1
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Pan X, Zhang W, Lao F, Mi R, Liao X, Luo D, Wu J. Isolation and identification of putative precursors of the volatile sulfur compounds and their inhibition methods in heat-sterilized melon juices. Food Chem 2020; 343:128459. [PMID: 33158672 DOI: 10.1016/j.foodchem.2020.128459] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 11/19/2022]
Abstract
Volatile sulfur compounds, such as dimethyl sulfide, dimethyl disulfide and dimethyl trisulfide, cause the off-flavor in heat-sterilized juices and limit the commercial production of juices. In this study, we investigated the precursors for these volatile sulfur compounds and analyzed the potential inhibition methods. Upon separation of melon juice components using resin column, the dimethyl sulfide precursor was present in the acidic fraction whereas the dimethyl trisulfide precursor was present in neutral and acidic fractions. Exogenous addition experiments indicated S-methyl methionine was the precursor of dimethyl sulfide, and methionine was the precursor of dimethyl disulfide and dimethyl trisulfide. The release of volatile sulfur compounds was reduced by decreasing the pH to 2.0, or by adding epicatechin. We concluded S-methyl methionine and methionine were degraded into volatile sulfur compounds through nucleophilic substitution and Strecker degradation. This study can help establishing protocols for controlling the release of volatile sulfur compounds in heat-sterilized juices.
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Affiliation(s)
- Xin Pan
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing 100083, China
| | - Wentao Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing 100083, China
| | - Fei Lao
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing 100083, China
| | - Ruifang Mi
- Beijing Academy of Food Sciences, Beijing 100068, China
| | - Xiaojun Liao
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing 100083, China
| | - Dongsheng Luo
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China.
| | - Jihong Wu
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing 100083, China.
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2
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Rezaee M, Honaker RQ. Long-term leaching characteristic study of coal processing waste streams. Chemosphere 2020; 249:126081. [PMID: 32062206 DOI: 10.1016/j.chemosphere.2020.126081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 01/23/2020] [Accepted: 01/31/2020] [Indexed: 06/10/2023]
Abstract
A study of the mobility of major and potentially hazardous trace elements from coal processing waste materials was conducted using two types of leaching tests. The baseline leaching test simulates stable waste storage under water, whereas the kinetic test models the storage of waste under more variable conditions including intermittent exposure to air and variations in humidity. Coarse and fine refuse materials were obtained from three commercial coal preparation plants that were being used to upgrade US bituminous run-of-mine coal containing low-to-high amounts of pyritic sulfur. X-ray diffraction analyses revealed a large variation in mineralogy between the coarse and fine refuse streams due to the mineral fractionation that occurs in the processing units and plant. The coarse refuse samples contained higher pyrite contents while the fine refuse samples had high clay content and a minor amount of calcite. This variation in mineralogy resulted in relatively large difference in the leaching characteristics of the waste streams. The most acidic pH and highest release of trace elements were observed in the leachate of coarse refuse containing medium-to-high amounts of coal pyrite, while the fine refuse samples released lower amounts of trace elements in their circumneutral leachate. The least amount of trace elements was observed in the leachate of low pyritic refuse streams. The test data suggested that the most effective disposal practice for coal waste material is segregation and isolation of the coal pyrite and co-disposal of the coarse and fine refuse streams.
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Affiliation(s)
- Mohammad Rezaee
- The Pennsylvania State University, John and Willie Leone Family Department of Energy and Mineral Engineering (EME), EMS Energy Institute & Center for Critical Minerals, USA.
| | - Rick Q Honaker
- University of Kentucky, Department of Mining Engineering, USA
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3
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Liu F, Lei Y, Shi J, Zhou L, Wu Z, Dong Y, Bi W. Effect of microbial nutrients supply on coal bio-desulfurization. J Hazard Mater 2020; 384:121324. [PMID: 31586921 DOI: 10.1016/j.jhazmat.2019.121324] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 09/13/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
Research on coal desulfurization is very important for economic, social, and environmentally sustainable development. In this study, three batches of shake flask experiments were conducted for coal bio-desulfurization using Acidithiobacillus ferrooxidans to explore the relationship between microbial nutrients (iron-free M9 K medium) supply and coal bio-desulfurization efficiency. The results showed that the removal rates of pyritic sulfur and total sulfur from coal effectively increased following reintroduction of coal into the filtrate from previous batch. The removal rates of pyritic sulfur and total sulfur were 55.6% and 10.0%, 77.1% and 16.1%, and 86.5% and 28.2%, respectively, in the three batch experiments without iron-free M9 K medium addition. In contrast, the removal rates of pyritic sulfur and total sulfur reached 87.5% and 28.2%, 89.1% and 31.6%, and 92.0% and 29.1%, respectively, in the three batch experiments with 6.7% iron-free M9 K medium addition. However, addition of excessive iron-free M9 K medium was detrimental to coal bio-desulfurization because of the synthesis of jarosite (MFe3(SO4)2(OH)6, M = K+, NH4+) and gypsum (CaSO4·2H2O), which further declined the pyritic sulfur bio-oxidation efficiency and total sulfur removal efficiency.
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Affiliation(s)
- Fenwu Liu
- Environmental Engineering Laboratory, College of Resource and Environment, Shanxi Agricultural University, Taigu, 030801, China.
| | - Yongsheng Lei
- Environmental Engineering Laboratory, College of Resource and Environment, Shanxi Agricultural University, Taigu, 030801, China
| | - Jing Shi
- Analytical Instrumentation center, Institute of coal chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, China
| | - Lixiang Zhou
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhihui Wu
- Sanshui Experimental Testing Center, Shanxi province, Jingzhong, 030600, China
| | - Yan Dong
- Environmental Engineering Laboratory, College of Resource and Environment, Shanxi Agricultural University, Taigu, 030801, China
| | - Wenlong Bi
- Environmental Engineering Laboratory, College of Resource and Environment, Shanxi Agricultural University, Taigu, 030801, China
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4
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Fan F, Zhang B, Liu J, Cai Q, Lin W, Chen B. Towards sulfide removal and sulfate reducing bacteria inhibition: Function of biosurfactants produced by indigenous isolated nitrate reducing bacteria. Chemosphere 2020; 238:124655. [PMID: 31472344 DOI: 10.1016/j.chemosphere.2019.124655] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 08/21/2019] [Accepted: 08/23/2019] [Indexed: 06/10/2023]
Abstract
The effectiveness of nitrate-mediated souring control highly depends on the interactions of sulfate reducing bacteria (SRB) and nitrate reducing bacteria (NRB). Biosurfactants produced by natural NRB are promising bio-agents for enhancing NRB competence towards SRB. However, the function of NRB-produced biosurfactants in NRB-SRB interactions remains unexplored due to the rarely successful isolation of natural biosurfactant-producing NRB. Hereby, biosurfactant-aided inhibitory control of SRB strain Desulfomicrobium escambiense ATCC 51164 by biosurfactant-producing NRB strain Pseudomonas stutzeri CX3, reported in our previous work, was investigated. Under non-sour conditions, insufficient nitrate injection resulted in limited SRB inhibition. Phospholipid fatty acid (PLFA) biomarkers traced the overall bacterial responses. Compositional PLFA patterns revealed biosurfactant addition benefitted both SRB and NRB towards stressful conditions. Under sour conditions, nitrite oxidation of sulfide proved to be the primary mechanism for sulfide removal. The subsequent elevation of redox potential and pH inhibited SRB activities. NRB-produced biosurfactants significantly enhanced SRB inhibition by NRB through more efficient sulfide removal and effective duration of nitrate in the microcosms. Biosurfactants specially produced by the NRB strain are for the first time reported to significantly strengthen SRB inhibition by NRB via reduced nitrate usage and prolonged effective duration of nitrate, which has encouraging potential in nitrate-dependent souring control.
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Affiliation(s)
- Fuqiang Fan
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada.
| | - Baiyu Zhang
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada.
| | - Jiabin Liu
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada.
| | - Qinhong Cai
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada.
| | - Weiyun Lin
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada.
| | - Bing Chen
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, A1B 3X5, Canada.
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5
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Chen Z, Zhang S, Zhong L. Simultaneous sulfide removal, nitrogen removal and electricity generation in a coupled microbial fuel cell system. Bioresour Technol 2019; 291:121888. [PMID: 31374413 DOI: 10.1016/j.biortech.2019.121888] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
A coupled microbial fuel cell (MFC) system, consisting of a nitrifying sulfide removal MFC and a denitrifying sulfide removal MFC, was assembled to simultaneously treat ammonium and sulfide in wastewater. It provided a promising approach to recover electricity from wastewater containing sulfide and ammonium. Considering both substrate removal and electricity generation performance, the desirable feeding S/N molar ratio was deemed as 3 and the optimal temperature was found to be 30 °C. Under this condition, the coupled MFC achieved a sum coulomb production of 554.8 C/d, a total nitrogen removal efficiency of 58.7 ± 1.3% and a sulfur production percent of 27.4 ± 0.4-33.3 ± 0.9%. The introduction of nitrifiers and electroactive oxic microbes from the oxic-cathode chamber into the anoxic-cathode chamber favored nitrogen removal.
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Affiliation(s)
- Zhuang Chen
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Shaohui Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Fuel Cell, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Liuxiang Zhong
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
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6
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Montalvo S, Huiliñir C, Borja R, Castillo A, Pereda I. Anaerobic digestion of wastewater rich in sulfate and sulfide: effects of metallic waste addition and micro-aeration on process performance and methane production. J Environ Sci Health A Tox Hazard Subst Environ Eng 2019; 54:1035-1043. [PMID: 31188049 DOI: 10.1080/10934529.2019.1623597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 05/17/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
This work explores the effect of two metallic wastes (mining wastes, MW; fly ashes, FA) and micro-aeration (MA) on the anaerobic digestion of wastewater which is rich in sulfate and sulfide. Two initial COD concentrations (5,000 and 10,000 mg/L) were studied under both conditions in batch systems at 35 °C, with a fixed COD/SO42- ratio = 10, with 100 mg/L of S2-. It was observed that the use of MW and FA in the assays with an initial COD concentration of 10,000 mg/L resulted in a simultaneous increase in COD removal, sulfate removal, sulfide removal and methane generation, while MA only improved the COD and sulfide removals in comparison with the control system. On the contrary, the use of MW, FA or MA in systems with initial COD concentrations equal to or lower than 5,000 mg/L did not show any improvement with respect to the control system in terms of COD removal, sulfate removal or methane generation, with only sulfide removal being positively affected by MW and FA.
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Affiliation(s)
- Silvio Montalvo
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química, Universidad de Santiago de Chile , Santiago de Chile , Chile
| | - César Huiliñir
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química, Universidad de Santiago de Chile , Santiago de Chile , Chile
| | | | - Alejandra Castillo
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química, Universidad de Santiago de Chile , Santiago de Chile , Chile
| | - Ileana Pereda
- Centro de Estudios de Tecnologías Energéticas Renovables, Universidad Tecnológica de La Habana , La Habana , Cuba
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7
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Chen C, Shi X, Yang Z, Fan F, Li Y. An integrated method for controlling the offensive odor and suspended matter originating from algae-induced black blooms. Chemosphere 2019; 221:526-532. [PMID: 30660909 DOI: 10.1016/j.chemosphere.2019.01.072] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 01/06/2019] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
Potentially toxic algae-induced black blooms can trigger crises in urban water supplies and have fatal effects on aquatic ecosystems. Urgent disposal methods to mitigate the taste and odor are imperative for ensuring the safety of the drinking water supply. In this study, we tested three oxidants and two flocculants to improve water quality after the occurrence of a black bloom. The results indicated that a two-step integrated treatment process is efficient as an urgent disposal measure. The first step is removal of volatile organic sulfide compounds (VOSCs) through the addition of H2O2. A total of 50 mg/L of H2O2 can largely decrease the concentrations of dimethyl trisulfide and related alkyl sulfide compounds in the water column. The second step is the flocculation and sedimentation of black-bloom-induced black matter via a chitosan-modified clay. The addition of 1 g/L of an attapulgite clay plus 10 mg/L of chitosan can effectively deposit suspended matter on the bottom of the water column and have a positive effect on the removal of nutrients.
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Affiliation(s)
- Chao Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China
| | - Xiaoli Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaian 223300, China.
| | - Zhen Yang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Fan Fan
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunxiang Li
- College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China
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8
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Ni G, Harnawan P, Seidel L, Ter Heijne A, Sleutels T, Buisman CJN, Dopson M. Haloalkaliphilic microorganisms assist sulfide removal in a microbial electrolysis cell. J Hazard Mater 2019; 363:197-204. [PMID: 30308358 DOI: 10.1016/j.jhazmat.2018.09.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 09/17/2018] [Accepted: 09/19/2018] [Indexed: 06/08/2023]
Abstract
Several industrial processes produce toxic sulfide containing streams that are often scrubbed using caustic solutions. An alternative, cost effective sulfide treatment method is bioelectrochemical sulfide removal. For the first time, a haloalkaliphilic sulfide-oxidizing microbial consortium was introduced to the anodic chamber of a microbial electrolysis cell operated at alkaline pH and with 1.0 M sodium ions. Under anode potential control, the highest sulfide removal rate was 2.16 mM/day and chemical analysis supported that the electrical current generation was from the sulfide oxidation. Biotic operation produced a maximum current density of 3625 mA/m2 compared to 210 mA/m2 while under abiotic operation. Furthermore, biotic electrical production was maintained for a longer period than for abiotic operation, potentially due to the passivation of the electrode by elemental sulfur during abiotic operation. The use of microorganisms reduced the energy input in this study compared to published electrochemical sulfide removal technologies. Sulfide-oxidizing populations dominated both the planktonic and electrode-attached communities with 16S rRNA gene sequences aligning within the genera Thioalkalivibrio, Thioalkalimicrobium, and Desulfurivibrio. The dominance of the Desulfurivibrio-like population on the anode surface offered evidence for the first haloalkaliphilic bacterium able to couple electrons from sulfide oxidation to extracellular electron transfer to the anode.
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Affiliation(s)
- Gaofeng Ni
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, P.O. Box 1113, Leeuwarden, 8911 MA, the Netherlands; Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden.
| | - Pebrianto Harnawan
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, P.O. Box 1113, Leeuwarden, 8911 MA, the Netherlands
| | - Laura Seidel
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Annemiek Ter Heijne
- Sub-Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands
| | - Tom Sleutels
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, P.O. Box 1113, Leeuwarden, 8911 MA, the Netherlands
| | - Cees J N Buisman
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, P.O. Box 1113, Leeuwarden, 8911 MA, the Netherlands; Sub-Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands
| | - Mark Dopson
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
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Shi ZJ, Xu LZJ, Wu D, Cheng YF, Zhang FY, Liao SM, Zhang ZZ, He MM, Jin RC. Anammox granule as new inoculum for start-up of anaerobic sulfide oxidation (ASO) process and its reverse start-up. Chemosphere 2019; 217:279-288. [PMID: 30419382 DOI: 10.1016/j.chemosphere.2018.11.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/07/2018] [Accepted: 11/03/2018] [Indexed: 06/09/2023]
Abstract
The feasibility of implementing anaerobic ammonium oxidation (anammox) granules to start up high-loading anaerobic sulfide oxidation (ASO) in an upflow anaerobic sludge bed (UASB) reactor was investigated. An innovation method of the reverse start-up of anammox was also validated. Firstly, the reactor was operated to treat sulfide-rich wastewaters into which nitrite was introduced as an electron acceptor. An high-rate performance with sulfide and nitrate removal rates of 105.5 ± 0.11 kg S m-3 d-1 and 28.45 ± 3.40 kg N m-3 d-1, respectively, was accomplished. Sulfurovum were enriched with the increase of the substrate load and then conquered Candidatus Kuenenia to be the predominant bacteria. Excitation-emission matrix (EEM) spectroscopy showed that the intensities of fluorescence decreased and protein-like substrates were the main components associated with the process of start-up. FT-IR analysis found that the main functional groups indicator were O-H groups. Secondly, the reverse start-up of anammox (achieving 90% TN removal) was achieved immediately when the substrate changed. 16S rRNA analysis indicated the successfully enrichment of anammox bacteria (Candidatus Kuenenia). These results suggest that anammox granules can act as inoculum of high-loading ASO process and the reverse start-up provides a new perspective for the fast initiation of anammox process.
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Affiliation(s)
- Zhi-Jian Shi
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China
| | - Lian-Zeng-Ji Xu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China
| | - Dan Wu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China
| | - Ya-Fei Cheng
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China
| | - Fu-Yue Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China
| | - Si-Mo Liao
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China
| | - Zheng-Zhe Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China
| | - Miao-Miao He
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China.
| | - Ren-Cun Jin
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, 310036, China.
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10
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Watsuntorn W, Ruangchainikom C, Rene ER, Lens PNL, Chulalaksananukul W. Comparison of sulphide and nitrate removal from synthetic wastewater by pure and mixed cultures of nitrate-reducing, sulphide-oxidizing bacteria. Bioresour Technol 2019; 272:40-47. [PMID: 30308406 DOI: 10.1016/j.biortech.2018.09.125] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/23/2018] [Accepted: 09/25/2018] [Indexed: 06/08/2023]
Abstract
In this study, the activities of hydrogen sulphide (H2S) oxidation and nitrate (N-NO3-) reduction by three pure and mixed strains of nitrate-reducing, sulphide oxidizing bacteria (NR-SOB) were determined. Batch experiments were performed at 35 °C and pH 7.0-8.0 with initial H2S concentrations of 650-900 ppmv and N-NO3- concentrations of ∼120 mg/L. The strains MAL 1HM19, TPN 1HM1 and TPN 3HM1 were capable of removing 100% gas-phase H2S. The co-cultures showed better performance for H2S and N-NO3- removal. The mixed NR-SOB strains showed a higher H2S oxidation rate (143 ± 18 ppmv/h), while the highest N-NO3- removal rate (5.5 ± 0 and 5.1 ± 0.6 N-NO3- mg/L·h) was obtained by a mixture of two NR-SOB strains. The 16S rDNA sequence analysis revealed that all strains belonged to the sub-class Alphaproteobacteria and are closely related to Paracoccus sp. (>99%).
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Affiliation(s)
- Wannapawn Watsuntorn
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | | | - Eldon R Rene
- UNESCO-IHE Institute for Water Education, P. O. Box 3015, 2601 DA Delft, The Netherlands
| | - Piet N L Lens
- UNESCO-IHE Institute for Water Education, P. O. Box 3015, 2601 DA Delft, The Netherlands
| | - Warawut Chulalaksananukul
- Biofuels by Biocatalysts Research Unit, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
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11
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Chen C, Shao B, Zhang RC, Xu XJ, Zhou X, Yuan Y, Ren NQ, Lee DJ. Mitigating adverse impacts of varying sulfide/nitrate ratios on denitrifying sulfide removal process performance. Bioresour Technol 2018; 267:782-788. [PMID: 30057004 DOI: 10.1016/j.biortech.2018.07.096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/17/2018] [Accepted: 07/18/2018] [Indexed: 06/08/2023]
Abstract
Complete removal of nitrogen, sulfur and carbon in wastewaters by denitrifying sulfide removal (DSR) process can be achieved at stoichiometry sulfide to nitrate ratio (S/N) of 1:1 in expanded granular sludge bed reactor. Wastewaters with varying S/N ratios can adversely impact the DSR performances with deterioration of synergetic cooperation between autotrophic and heterotrophic denitrifiers. DO (dissolved oxygen) serves effectively as supplementary electron receiver for sulfide oxidation, leaving more nitrate for heterotrophic denitrifiers to utilize acetate. The optimal oxygen to sulfide molar ratio (DO/S) is 0.5:1 for complete removal of sulfide, nitrate and acetate at different S/N ratios. The heterotrophic denitrification rate was decreased to 0.03 ± 0.002, 0.24 ± 0.011 and 0.35 ± 0.027 NO3--N·h-1·gVSS-1 at S/N ratio of 5:2, 5:5 and 5:8, respectively, when DO/S of 3:1 was performed. This optimal condition was proposed as an easy-to-implement control criterion for subsiding the adverse impact by varying S/N ratios in handling real wastewaters.
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Affiliation(s)
- Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Bo Shao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Ruo-Chen Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Xu Zhou
- Engineering Laboratory of Microalgal Bioenergy, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
| | - Yuan Yuan
- Department of Biotechnology, Beijing Polytechnic, Beijing 100029, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
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Argüello-García R, de la Vega-Arnaud M, Loredo-Rodríguez IJ, Mejía-Corona AM, Melgarejo-Trejo E, Espinoza-Contreras EA, Fonseca-Liñán R, González-Robles A, Pérez-Hernández N, Ortega-Pierres MG. Activity of Thioallyl Compounds From Garlic Against Giardia duodenalis Trophozoites and in Experimental Giardiasis. Front Cell Infect Microbiol 2018; 8:353. [PMID: 30374433 PMCID: PMC6196658 DOI: 10.3389/fcimb.2018.00353] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 09/18/2018] [Indexed: 12/18/2022] Open
Abstract
Fresh aqueous extracts (AGEs) and several thioallyl compounds (TACs) from garlic have an important antimicrobial activity that likely involves their interaction with exposed thiol groups at single aminoacids or target proteins. Since these groups are present in Giardia duodenalis trophozoites, in this work we evaluated the anti-giardial activity of AGE and several garlic's TACs. In vitro susceptibility assays showed that AGE affected trophozoite viability initially by a mechanism impairing cell integrity and oxidoreductase activities while diesterase activities were abrogated at higher AGE concentrations. The giardicidal activities of seven TACs were related to the molecular descriptor HOMO (Highest Occupied Molecular Orbital) energy and with their capacity to modify the -SH groups exposed in giardial proteins. Interestingly, the activity of several cysteine proteases in trophozoite lysates was inhibited by representative TACs as well as the cytopathic effect of the virulence factor giardipain-1. Of these, allicin showed the highest anti-giardial activity, the lower HOMO value, the highest thiol-modifying activity and the greatest inhibition of cysteine proteases. Allicin had a cytolytic mechanism in trophozoites with subsequent impairment of diesterase and oxidoreductase activities in a similar way to AGE. In addition, by electron microscopy a marked destruction of plasma membrane and endomembranes was observed in allicin-treated trophozoites while cytoskeletal elements were not affected. In further flow cytometry analyses pro-apoptotic effects of allicin concomitant to partial cell cycle arrest at G2 phase with the absence of oxidative stress were observed. In experimental infections of gerbils, the intragastric administration of AGE or allicin decreased parasite numbers and eliminated trophozoites in experimentally infected animals, respectively. These data suggest a potential use of TACs from garlic against G. duodenalis and in the treatment of giardiasis along with their additional benefits in the host's health.
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Affiliation(s)
- Raúl Argüello-García
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Mariana de la Vega-Arnaud
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Iraís J. Loredo-Rodríguez
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Adriana M. Mejía-Corona
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Elizabeth Melgarejo-Trejo
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Eulogia A. Espinoza-Contreras
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Rocío Fonseca-Liñán
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Arturo González-Robles
- Departamento de Infectómica y Patogénesis Experimental, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Nury Pérez-Hernández
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Mexico City, Mexico
| | - M. Guadalupe Ortega-Pierres
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
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13
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Shammay A, Evanson I, Stuetz RM. A comparison of removal performance of volatile organic and sulfurous compounds between odour abatement systems. Water Sci Technol 2018; 77:2657-2667. [PMID: 29944130 DOI: 10.2166/wst.2018.223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Three types of odour abatement systems in sewer networks in Australia were studied for 18 months to determine the removals of different compounds. Six volatile sulfurous compounds and seven volatile organic compounds (VOCs) were further investigated. All types of odour abatement systems exhibited good removal of hydrogen sulfide with the biotrickling filters (BTFs) showing the highest consistent removal. Biofilters outperformed BTFs and activated carbon (AC) filters in the removal of dimethyl mono-, di- and tri-sulfide species at the low inlet concentrations typically found. AC filters exhibited little VOC removal with no compound consistently identified as having a removal greater than 0%. Biofilters outperformed BTFs in VOC removal, yet both had high removal variability.
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Affiliation(s)
- A Shammay
- School of Civil and Environmental Engineering, UNSW, Sydney, NSW, Australia E-mail: ; Stantec Australia, North Sydney, NSW, Australia
| | - I Evanson
- Stantec Australia, North Sydney, NSW, Australia
| | - R M Stuetz
- School of Civil and Environmental Engineering, UNSW, Sydney, NSW, Australia E-mail:
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Masiukovichi T, Murtazashvili T, Bakuridze A. DEVELOPMENT OF THE FORMULATION AND TECHNOLOGY OF HYDROGEL, CONTAINING ADJARA REGION SULFIDE SILT PELOID. Georgian Med News 2018:157-162. [PMID: 29578442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the world today, the demand for the preparations and cosmetics, made of peloids is increasing significantly, which is explained by the increased interest of the community to the ecologically clean raw materials of natural origin, it often replaces expensive chemical preparations, which are often accompanied by some contraindications. The increased interest in peloids in the world put on the agenda the question of rational use of acting mud mines as well as the problem of cosmetic and medicinal preparations, developed on their basis. It is noteworthy that the development of ready-made, soft drug forms from the Adjara region sulfide silt peloids is one of the most topical and important issues, as at present there is not available the form of ready-made drugs containing the sulfide silt peloids of this region. Therefore, the aim of the research was to develop the formulation and technology of the hydrogel, containing the Adjara region sulfide silt peloid. The sulfide silt peloid of the Ardagani lake have been used for preparing the hydrogel compositions, as it is distinguished by its advantageous physical-chemical properties and content of biologically active ingredients compared with other studied peloids. The main physical-chemical and technological characteristics of hydrogels compositions have been studied using the following methods: uniformity, pH, the colloidal stability, thermal stability , osmotic activity - by dialysis method using semiconductor membrane (Kruvichinski method), release of active ingredient was studied by using Franz diffusion cells, viscosity was determined by Viscometer RVDV-1 T (Dongguan Zhongli Instrument Technology Co., China), the structure of hydrogel composition - by microscopic (ROW Rathenow, Germany) examination. Based on the conducted studies have been established, that the hydrogel composition N6 is distinguished by its best properties compared to other hydrogel compositions, in which the carboxymethylcellulose was used as a base.The conducted studies became the basis for the development of the formula and technological scheme of production for the hydrogel of Ardagani lake sulfide silt peloid of Adjara region. The results of determining the main characteristics of the given gel provide the desired quality and efficiency of the product.
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Affiliation(s)
- T Masiukovichi
- Tbilisi State Medical University, Department of Pharmaceutical and Toxicological Chemistry; Department of Pharmaceutical Technology, Georgia
| | - T Murtazashvili
- Tbilisi State Medical University, Department of Pharmaceutical and Toxicological Chemistry
| | - A Bakuridze
- Tbilisi State Medical University, Department of Pharmaceutical and Toxicological Chemistry
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15
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Liu J, Wei LX, Wang Q, Lu YF, Zhang F, Shi JZ, Li C, Cherian MG. A review of cinnabar (HgS) and/or realgar (As 4S 4)-containing traditional medicines. J Ethnopharmacol 2018; 210:340-350. [PMID: 28864167 DOI: 10.1016/j.jep.2017.08.037] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 08/27/2017] [Accepted: 08/28/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMOCOLOGICAL RELEVANCE Herbo-metallic preparations have a long history in the treatment of diseases, and are still used today for refractory diseases, as adjuncts to standard therapy, or for economic reasons in developing countries. AIM OF THE REVIEW This review uses cinnabar (HgS) and realgar (As4S4) as mineral examples to discuss their occurrence, therapeutic use, pharmacology, toxicity in traditional medicine mixtures, and research perspectives. MATERIALS AND METHODS A literature search on cinnabar and realgar from PubMed, Chinese pharmacopeia, Google and other sources was carried out. Traditional medicines containing both cinnabar and realgar (An-Gong-Niu-Huang Wan, Hua-Feng-Dan); mainly cinnabar (Zhu-Sha-An-Shen Wan; Zuotai and Dangzuo), and mainly realgar (Huang-Dai Pian; Liu-Shen Wan; Niu-Huang-Jie-Du) are discussed. RESULTS Both cinnabar and realgar used in traditional medicines are subjected to special preparation procedures to remove impurities. Metals in these traditional medicines are in the sulfide forms which are different from environmental mercurials (HgCl2, MeHg) or arsenicals (NaAsO2, NaH2AsO4). Cinnabar and/or realgar are seldom used alone, but rather as mixtures with herbs and/or animal products in traditional medicines. Advanced technologies are now used to characterize these preparations. The bioaccessibility, absorption, distribution, metabolism and elimination of these herbo-metallic preparations are different from environmental metals. The rationale of including metals in traditional remedies and their interactions with drugs need to be justified. At higher therapeutic doses, balance of the benefits and risks is critical. Surveillance of patients using these herbo-metallic preparations is desired. CONCLUSION Chemical forms of mercury and arsenic are a major determinant of their disposition, efficacy and toxicity, and the use of total Hg and As alone for risk assessment of metals in traditional medicines is insufficient.
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Affiliation(s)
- Jie Liu
- Key Lab for Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, China.
| | - Li-Xin Wei
- Key Lab of Pharmacology and Safety Evaluation of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
| | - Qi Wang
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China
| | - Yuan-Fu Lu
- Key Lab for Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, China
| | - Feng Zhang
- Key Lab for Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, China
| | - Jing-Zhen Shi
- Central Lab of Guiyang Traditional Medical College, Guiyang 550004, China
| | - Cen Li
- Key Lab of Pharmacology and Safety Evaluation of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
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16
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Koike S, Kawamura K, Kimura Y, Shibuya N, Kimura H, Ogasawara Y. Analysis of endogenous H 2S and H 2S n in mouse brain by high-performance liquid chromatography with fluorescence and tandem mass spectrometric detection. Free Radic Biol Med 2017; 113:355-362. [PMID: 29055825 DOI: 10.1016/j.freeradbiomed.2017.10.346] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/14/2017] [Accepted: 10/17/2017] [Indexed: 12/28/2022]
Abstract
Previous studies indicated that bound sulfur species (BSS), including hydrogen polysulfide (H2Sn), have various physiological functions in mammalian cells. Although H2Sn molecules have been considered as secondary metabolites derived from hydrogen sulfide (H2S) based on in vitro studies or predetermined reaction formula, the physiological form of BSS and their endogenous concentration remain unclear. In the present study, we aimed to improve the usual method using monobromobimane (mBB) followed by high performance liquid chromatographic (HPLC) analysis for HS- for simultaneous determination of H2S, H2S2, H2S3 and cysteine persulfide in biological samples. We demonstrated that mBB derivatization of H2S and H2Sn standards under alkaline conditions (pH 9.5) induced significant decreases in H2S2 and H2S3 levels and a significant increase in the H2S level in an incubation time-dependent manner. Conversely, the derivatization of mBB adducts of H2S2 and H2S3 were stable under neutral conditions (pH 7.0), which is physiologically relevant. Therefore, we re-examined the method using mBB and applied an improved method for the evaluation of H2S, H2S2, and H2S3 in mouse brain under physiological pH conditions. The concentrations of H2S and H2S2 were 0.030 ± 0.004μmol/g protein and 0.026 ± 0.002μmol/g protein, respectively. Although the level of H2S3 was below the quantification limit of this method, H2S3 was detected in mouse brain. Using the method established here, we reveal for the first time the existence of endogenous H2S2 and H2S3 in mammalian brain tissues. H2S2 and H2S3 exert anti-oxidant activity and anti-carbonyl stress effects through the regulation of redox balance in neuronal cells. Thus, our observations provide novel insights into the physiological functions of BSS in the brain and into neuronal diseases involved in redox imbalance.
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Affiliation(s)
- Shin Koike
- Department of Analytical Biochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Kumiko Kawamura
- Department of Analytical Biochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Yuka Kimura
- National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawahigashi, Kodaira, Tokyo 187-8502, Japan
| | - Norihiro Shibuya
- National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawahigashi, Kodaira, Tokyo 187-8502, Japan
| | - Hideo Kimura
- National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawahigashi, Kodaira, Tokyo 187-8502, Japan
| | - Yuki Ogasawara
- Department of Analytical Biochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
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17
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Abstract
Dengue virus (DENV) is a mosquito-borne flavivirus that causes significant global human disease and mortality. One approach to develop treatments for DENV infection and the prevention of severe disease is through investigation of natural medicines. Inflammation plays both beneficial and harmful roles during DENV infection. Studies have proposed that the oxidative stress response may be one mechanism responsible for triggering inflammation during DENV infection. Thus, blocking the oxidative stress response could reduce inflammation and the development of severe disease. Garlic has been shown to both reduce inflammation and affect the oxidative stress response. Here, we show that the garlic active compounds diallyl disulfide (DADS), diallyl sulfide (DAS) and alliin reduced inflammation during DENV infection and show that this reduction is due to the effects on the oxidative stress response. These results suggest that garlic could be used as an alternative treatment for DENV infection and for the prevention of severe disease development.
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Affiliation(s)
- Alex Hall
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA.
| | - Andrea Troupin
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA.
| | - Berlin Londono-Renteria
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Tonya M Colpitts
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA.
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18
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Chen C, Zhang RC, Xu XJ, Fang N, Wang AJ, Ren NQ, Lee DJ. Enhanced performance of denitrifying sulfide removal process at high carbon to nitrogen ratios under micro-aerobic condition. Bioresour Technol 2017; 232:417-422. [PMID: 28238639 DOI: 10.1016/j.biortech.2017.02.031] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 02/05/2017] [Accepted: 02/08/2017] [Indexed: 06/06/2023]
Abstract
The success of denitrifying sulfide removal (DSR) processes, which simultaneously degrade sulfide, nitrate and organic carbon in the same reactor, counts on synergetic growths of autotrophic and heterotrophic denitrifiers. Feeding wastewaters at high C/N ratio would stimulate overgrowth of heterotrophic bacteria in the DSR reactor so deteriorating the growth of autotrophic denitrifiers. The DSR tests at C/N=1.26:1, 2:1 or 3:1 and S/N =5:6 or 5:8 under anaerobic (control) or micro-aerobic conditions were conducted. Anaerobic DSR process has <50% sulfide removal with no elemental sulfur transformation. Under micro-aerobic condition to remove <5% sulfide by chemical oxidation pathway, 100% sulfide removal is achieved by the DSR consortia. Continuous-flow tests under micro-aerobic condition have 70% sulfide removal and 55% elemental sulfur recovery. Trace oxygen enhances activity of sulfide-oxidizing, nitrate-reducing bacteria to accommodate properly the wastewater with high C/N ratios.
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Affiliation(s)
- Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China
| | - Ruo-Chen Zhang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China
| | - Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China
| | - Ning Fang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China
| | - Duu-Jong Lee
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang Province 150090, China; Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
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19
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Huang LH, Chen YX, Yu JC, Yuan J, Li HJ, Ma WZ, Watanapokasin R, Hu KC, Niaz SI, Yang DP, Lan WJ. Secondary Metabolites from the Marine-Derived Fungus Dichotomomyces sp. L-8 and Their Cytotoxic Activity. Molecules 2017; 22:molecules22030444. [PMID: 28287456 PMCID: PMC6155177 DOI: 10.3390/molecules22030444] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/03/2017] [Accepted: 03/07/2017] [Indexed: 01/01/2023] Open
Abstract
Bioassay-guided isolation of the secondary metabolites from the fungus Dichotomomyces sp. L-8 associated with the soft coral Lobophytum crassum led to the discovery of two new compounds, dichotones A and B (1 and 2), together with four known compounds including dichotocejpin C (3), bis-N-norgliovictin (4), bassiatin (5) and (3R,6R)-bassiatin (6). The structures of these compounds were determined by 1D, 2D NMR and mass spectrometry. (3R,6R)-bassiatin (6) displayed significant cytotoxic activities against the human breast cancer cell line MDA-MB-435 and the human lung cancer cell line Calu3 with IC50 values of 7.34 ± 0.20 and 14.54 ± 0.01 μM, respectively, while bassiatin (5), the diastereomer of compound 6, was not cytotoxic.
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Affiliation(s)
- Li-Hong Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
- Guangdong Technology Research Center for Advanced Chinese Medicine, Guangzhou 510006, China.
| | - Yan-Xiu Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
- Guangdong Technology Research Center for Advanced Chinese Medicine, Guangzhou 510006, China.
| | - Jian-Chen Yu
- Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan Road II, Guangzhou 510080, China.
| | - Jie Yuan
- Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan Road II, Guangzhou 510080, China.
| | - Hou-Jin Li
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China.
| | - Wen-Zhe Ma
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa 519020, Macau (SAR), China.
| | - Ramida Watanapokasin
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Bangkok 10110, Thailand.
| | - Kun-Chao Hu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
- Guangdong Technology Research Center for Advanced Chinese Medicine, Guangzhou 510006, China.
| | - Shah Iram Niaz
- Institute of Chemical Sciences, Gomal University, D.I.Khan 29050, Pakistan.
| | - De-Po Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
- Guangdong Technology Research Center for Advanced Chinese Medicine, Guangzhou 510006, China.
| | - Wen-Jian Lan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
- Guangdong Technology Research Center for Advanced Chinese Medicine, Guangzhou 510006, China.
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20
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Le Pape P, Battaglia-Brunet F, Parmentier M, Joulian C, Gassaud C, Fernandez-Rojo L, Guigner JM, Ikogou M, Stetten L, Olivi L, Casiot C, Morin G. Complete removal of arsenic and zinc from a heavily contaminated acid mine drainage via an indigenous SRB consortium. J Hazard Mater 2017; 321:764-772. [PMID: 27720469 DOI: 10.1016/j.jhazmat.2016.09.060] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/01/2016] [Accepted: 09/26/2016] [Indexed: 05/27/2023]
Abstract
Acid mine drainages (AMD) are major sources of pollution to the environment. Passive bio-remediation technologies involving sulfate-reducing bacteria (SRB) are promising for treating arsenic contaminated waters. However, mechanisms of biogenic As-sulfide formation need to be better understood to decontaminate AMDs in acidic conditions. Here, we show that a high-As AMD effluent can be decontaminated by an indigenous SRB consortium. AMD water from the Carnoulès mine (Gard, France) was incubated with the consortium under anoxic conditions and As, Zn and Fe concentrations, pH and microbial activity were monitored during 94days. Precipitated solids were analyzed using electron microscopy (SEM/TEM-EDXS), and Extended X-Ray Absorption Fine Structure (EXAFS) spectroscopy at the As K-edge. Total removal of arsenic and zinc from solution (1.06 and 0.23mmol/L, respectively) was observed in two of the triplicates. While Zn precipitated as ZnS nanoparticles, As precipitated as amorphous orpiment (am-AsIII2S3) (33-73%), and realgar (AsIIS) (0-34%), the latter phase exhibiting a particular nanowire morphology. A minor fraction of As is also found as thiol-bound AsIII (14-23%). We propose that the formation of the AsIIS nanowires results from AsIII2S3 reduction by biogenic H2S, enhancing the efficiency of As removal. The present description of As immobilization may help to set the basis for bioremediation strategies using SRB.
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Affiliation(s)
- Pierre Le Pape
- Sorbonne Universités - Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR IRD 206, UPMC Université Paris VI, 4 place Jussieu, 75252 Paris cedex 05, France.
| | | | - Marc Parmentier
- French Geological Survey (BRGM), 3 av. Claude Guillemin, 45060, BP 36009, Orléans Cedex 2, France
| | - Catherine Joulian
- French Geological Survey (BRGM), 3 av. Claude Guillemin, 45060, BP 36009, Orléans Cedex 2, France
| | - Cindy Gassaud
- French Geological Survey (BRGM), 3 av. Claude Guillemin, 45060, BP 36009, Orléans Cedex 2, France
| | - Lidia Fernandez-Rojo
- HydroSciences Montpellier, UMR 5569 CNRS-IRD-UM, CC57, 163 rue Auguste Broussonet, 34090 Montpellier, France
| | - Jean-Michel Guigner
- Sorbonne Universités - Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR IRD 206, UPMC Université Paris VI, 4 place Jussieu, 75252 Paris cedex 05, France
| | - Maya Ikogou
- Sorbonne Universités - Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR IRD 206, UPMC Université Paris VI, 4 place Jussieu, 75252 Paris cedex 05, France
| | - Lucie Stetten
- Sorbonne Universités - Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR IRD 206, UPMC Université Paris VI, 4 place Jussieu, 75252 Paris cedex 05, France
| | - Luca Olivi
- Sincrotrone Trieste ELETTRA, I-34012 Trieste, Italy
| | - Corinne Casiot
- HydroSciences Montpellier, UMR 5569 CNRS-IRD-UM, CC57, 163 rue Auguste Broussonet, 34090 Montpellier, France
| | - Guillaume Morin
- Sorbonne Universités - Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR IRD 206, UPMC Université Paris VI, 4 place Jussieu, 75252 Paris cedex 05, France
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Tan W, Huang C, Chen C, Liang B, Wang A. Bioaugmentation of activated sludge with elemental sulfur producing strain Thiopseudomonas denitrificans X2 against nitrate shock load. Bioresour Technol 2016; 220:647-650. [PMID: 27590576 DOI: 10.1016/j.biortech.2016.08.093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 06/06/2023]
Abstract
The sulfide and nitrogen compounds in wastewaters are toxic and cause a serious environmental problem. Thiopseudomonas denitrificans X2, which is the type species of a novel genus Thiopseudomonas was used for bioaugmentation. It oxidized sulfide and acetate with nitrate, and generated elemental sulfur that could be recovered as resource. The generation rate of elemental sulfur was enhanced significantly by the bioaugmentation under the condition of excessive nitrate feeding. The inoculums survived and worked actively in the activated sludge system as the dominant population. Thiopseudomonas denitrificans X2 could be applied to wastewater treatment and resource recovery simultaneously.
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Affiliation(s)
- Wenbo Tan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Cong Huang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Bin Liang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Aijie Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
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22
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Omri Hichri A, Mosbah H, Majouli K, Besbes Hlila M, Ben Jannet H, Flamini G, Aouni M, Selmi B. Chemical composition and biological activities of Eruca vesicaria subsp. longirostris essential oils. Pharm Biol 2016; 54:2236-2243. [PMID: 26983675 DOI: 10.3109/13880209.2016.1151445] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Context To date, there are no reports to validate the Tunisian traditional and folklore claims of Eruca vesicaria (L) Cav. subsp. longirostris (Brassicaceae) for the treatment of disease. Objective Investigation of the chemical composition antimicrobial and antioxidant activity of essential oils from Eruca longirostris leaves, stems, roots and fruits. Materials and methods The essential oils of E. longirostris from leaves, stems, roots and fruits were obtained after 4 h of hydrodistillation. Chemical compositions were determined using a combination of GC/FID and GC/MS. The in vitro antimicrobial activity of the volatile constituents of E. longirostris was performed in sterile 96-well microplates against three Gram-positive, four Gram-negative bacteria and one strain as yeast. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration values were reported. Furthermore, the antioxidant activity was evaluated by DPPH and ABTS assays. Results The main compound for fruits, stems and roots was the erucin (96.6%, 85.3% and 83.7%, respectively), while β-elemene (35.7%), hexahydrofarnesylacetone (23.9%), (E)-β-damascone (15.4%), erucin (10.6%) and α-longipinene (9.6%) constituted the major compounds in the essential oil of the leaves. The experimental results showed that in all tests, essential oil of fruits showed the better antioxidant activity than the others. On the other hand, the oils of stems, fruits and roots showed significant antimicrobial activity with MIC values ranging from 0.125 to 0.31 mg/mL against Candida species, Gram-positive and Gram-negative bacteria, mainly Salmonella enterica. Conclusions The present results indicate that essential oils of E. longirostris can be used as a source of erucin.
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Affiliation(s)
- Amel Omri Hichri
- a Laboratoire Des Maladies Transmissibles Et Des Substances Biologiquement Actives, Faculté De Pharmacie , Monastir , Tunisia
| | - Habib Mosbah
- b Laboratoire De Bioressources: Biologie Integrative Et Valorisation (BIOLIVAL) , Institut Supérieur De Biotechnologie De Monastir, Université De Monastir , Monastir , Tunisia
| | - Kaouther Majouli
- c Laboratoire De Biochimie, Mécanismes Moléculaires Et Maladie, Faculté De Médecine De Monastir , Université De Monastir , Monastir , Tunisia
| | - Malek Besbes Hlila
- a Laboratoire Des Maladies Transmissibles Et Des Substances Biologiquement Actives, Faculté De Pharmacie , Monastir , Tunisia
| | - Hichem Ben Jannet
- d Laboratoire De Chimie Hétérocyclique, Produits Naturels Et Réactivité, Equipe: Chimie Médicinale Et Produits Naturels, Faculté Des Sciences De Monastir , Université De Monastir , Monastir , Tunisia
| | - Guido Flamini
- e Dipartimento Di Farmacia , via Bonanno , Pisa , Italy
| | - Mahjoub Aouni
- a Laboratoire Des Maladies Transmissibles Et Des Substances Biologiquement Actives, Faculté De Pharmacie , Monastir , Tunisia
| | - Boulbaba Selmi
- b Laboratoire De Bioressources: Biologie Integrative Et Valorisation (BIOLIVAL) , Institut Supérieur De Biotechnologie De Monastir, Université De Monastir , Monastir , Tunisia
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Wang N, Wang W, Liu C, Jin J, Shao B, Shen L. Inhibition of growth and induction of apoptosis in A549 cells by compounds from oxheart cabbage extract. J Sci Food Agric 2016; 96:3813-3820. [PMID: 26679410 DOI: 10.1002/jsfa.7575] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 11/11/2015] [Accepted: 12/18/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Oxheart cabbage (Brassica oleracea var. capitata) is a member of the Brassica genus. Although some studies on the anticancer effects of extracts from oxheart cabbage have been reported, comprehensive information on the bioactive fractions and components from oxheart cabbage extracts is still lacking. The aim of this study was to isolate and identify the bioactive fractions and components from oxheart cabbage seeds using activity-guided isolation methods. RESULTS The cytotoxicity and apoptotic effects of fraction II, fraction III, iberverin, sulforaphane and iberin from oxheart cabbage seed extract were investigated. The results showed that all five components had inhibitory effects on the in vitro growth of A549 cells which were dose-dependent. These compounds also changed the morphology of A549 cells, and their inhibitory activity on A549 cells was as follows: sulforaphane > iberin > iberverin > fraction III > fraction II. The IC50 values were 3.53 ± 0.63, 4.93 ± 1.02, 7.07 ± 0.51, 15.56 ± 0.24 and 27.32 ± 0.63 µg mL(-1) respectively. Fraction II, fraction III, iberverin, sulforaphane and iberin induced cell apoptosis by increasing early apoptosis and late apoptosis/necrosis, and activation of caspase-3, -8 and -9. CONCLUSION These results indicated that the decrease in A549 cell viability by active compounds from oxheart cabbage seed extract was due to the induction of apoptosis. © 2015 Society of Chemical Industry.
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Affiliation(s)
- Nan Wang
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310021, China
| | - Wei Wang
- Institute of Quality and Standard for Agriculture Products, Zhejiang Academy of Agriculture Sciences, Hangzhou 310021, China
| | - Caiqin Liu
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310021, China
| | - Jianchang Jin
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310021, China
| | - Bo Shao
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310021, China
| | - Lianqing Shen
- College of Food Science and Biotechnology Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
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Liu C, Xu J, Lee DJ, Yu D, Liu L. Denitrifying sulfide removal process on high-tetracycline wastewater. Bioresour Technol 2016; 205:254-257. [PMID: 26810146 DOI: 10.1016/j.biortech.2016.01.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 01/05/2016] [Accepted: 01/08/2016] [Indexed: 06/05/2023]
Abstract
Antibiotics wastewater from tetracycline (TC) production unit can have high levels of chemical oxygen demand, ammonium and sulfate and up to a few hundreds of milligrams per liter of TC. Denitrifying sulfide removal (DSR) process is set up for simultaneously removal of sulfur, carbon and nitrogen from waters. The DSR process was for the first time studied for treating TC wastewaters. The TC stress has no adverse effects on removal rates of nitrate and acetate; however, it moderately deteriorated sulfide removal rates and S(0) accumulation rates when the concentration is higher than 100mgL(-1) TC. The Thauera sp., and Pseudomonas sp. present the heterotrophs and Sulfurovum sp. presented the autotroph for the present DSR reactions. The high tolerance of TC stress by the tested consortium was explained by the excess production of extracellular polymeric substances at high TC concentration, which can bind with TC for minimizing its inhibition effects.
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Affiliation(s)
- Chunshuang Liu
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Jian Xu
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Daoyong Yu
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Lihong Liu
- School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China
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25
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Vaiopoulou E, Provijn T, Prévoteau A, Pikaar I, Rabaey K. Electrochemical sulfide removal and caustic recovery from spent caustic streams. Water Res 2016; 92:38-43. [PMID: 26827256 DOI: 10.1016/j.watres.2016.01.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 12/30/2015] [Accepted: 01/18/2016] [Indexed: 06/05/2023]
Abstract
Spent caustic streams (SCS) are produced during alkaline scrubbing of sulfide containing sour gases. Conventional methods mainly involve considerable chemical dosing or energy expenditures entailing high cost but limited benefits. Here we propose an electrochemical treatment approach involving anodic sulfide oxidation preferentially to sulfur coupled to cathodic caustic recovery using a two-compartment electrochemical system. Batch experiments showed sulfide removal efficiencies of 84 ± 4% with concomitant 57 ± 4% efficient caustic production in the catholyte at a final concentration of 6.4 ± 0.1 wt% NaOH (1.6 M) at an applied current density of 100 A m(-2). Subsequent long-term continuous experiments showed that stable cell voltages (i.e. 2.7 ± 0.1 V) as well as constant sulfide removal efficiencies of 67 ± 5% at a loading rate of 47 g(S) L(-1) h(-1) were achieved over a period of 77 days. Caustic was produced at industrially relevant strengths for scrubbing (i.e. 5.1 ± 0.9 wt% NaOH) at current efficiencies of 96 ± 2%. Current density between 0 and 200 A m(-2) and sulfide loading rates of 50-200 g(S) L(-1) d(-1) were tested. The higher the current density the more oxidized the sulfur species produced and the higher the sulfide oxidation. On the contrary, high loading rate resulted in a reduction of sulfide oxidation efficiency. The results obtained in this study together with engineering calculations show that the proposed process could represent a cost-effective approach for sodium and sulfur recovery from SCS.
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Affiliation(s)
- Eleni Vaiopoulou
- Laboratory of Microbial Ecology & Technology, Faculty of Bioscience Engineering, University of Ghent, Coupure Links 653, 9000, Ghent, Belgium
| | - Thomas Provijn
- Laboratory of Microbial Ecology & Technology, Faculty of Bioscience Engineering, University of Ghent, Coupure Links 653, 9000, Ghent, Belgium
| | - Antonin Prévoteau
- Laboratory of Microbial Ecology & Technology, Faculty of Bioscience Engineering, University of Ghent, Coupure Links 653, 9000, Ghent, Belgium
| | - Ilje Pikaar
- School of Civil Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Korneel Rabaey
- Laboratory of Microbial Ecology & Technology, Faculty of Bioscience Engineering, University of Ghent, Coupure Links 653, 9000, Ghent, Belgium.
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26
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Huang C, Li ZL, Chen F, Liu Q, Zhao YK, Gao LF, Chen C, Zhou JZ, Wang AJ. Efficient regulation of elemental sulfur recovery through optimizing working height of upflow anaerobic sludge blanket reactor during denitrifying sulfide removal process. Bioresour Technol 2016; 200:1019-1023. [PMID: 26497112 DOI: 10.1016/j.biortech.2015.09.109] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 09/25/2015] [Accepted: 09/29/2015] [Indexed: 06/05/2023]
Abstract
In this study, two lab-scale UASB reactors were established to testify S(0) recovery efficiency, and one of which (M-UASB) was improved from the previous T-UASB by shortening reactor height once S(2-) over oxidation was observed. After the height was shortened from 60 to 30cm, S(0) recovery rate was improved from 7.4% to 78.8%, and while, complete removal of acetate, nitrate and S(2-) was simultaneously maintained. Meanwhile, bacterial community distribution was homogenous throughout the reactor, with denitrifying sulfide oxidization bacteria predominant, such as Thauera and Azoarcus spp., indicating the optimized condition for S(0) recovery. The effective control of working height/volume in reactors plays important roles for the efficient regulation of S(0) recovery during DSR process.
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Affiliation(s)
- Cong Huang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Zhi-Ling Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Fan Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Qian Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - You-Kang Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Ling-Fang Gao
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Ji-Zhong Zhou
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019, USA; Earth Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94270, USA
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
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Abstract
Diallyl sulfide (C6H10S, DAS) is one of the novel natural organosulfur compounds, which is mostly obtained from the genus Allium plants. Numerous studies have revealed several unique properties of DAS in terms of its health-promoting effects. DAS has proved to be anticancer, antimicrobial, anti-angiogenic, and immunomodulatory like unique functions as demonstrated by the multiple investigations. Diallyl sulfide can also impede oxidative stress and chronic inflammation as suggested by the literature. Studies also explored that DAS could thwart the development of chronic diseases like cancer, neuronal, cardiovascular disease through modulating mechanistic pathways involved in pathogenesis. In this book chapter, we have attempted to give the comprehensive view on DAS about the physiochemical and biological properties, and its preventive role in chronic diseases with a mechanistic overview.
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Affiliation(s)
- Shankar Suman
- Food, Drug and Chemical Toxicology Division, CSIR-Indian Institute of Toxicology Research, 31, Vish Vigyan Bhawan, M.G. Marg, Lucknow, 226001, Uttar Pradesh, India
| | - Yogeshwer Shukla
- Food, Drug and Chemical Toxicology Division, CSIR-Indian Institute of Toxicology Research, 31, Vish Vigyan Bhawan, M.G. Marg, Lucknow, 226001, Uttar Pradesh, India.
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Wei L, Xiao L, Lei L, Jianguo L. Sulfide-based mixotrophic denitrification for treatment of sulfur, nitrogen and carbon-contaminated wastewater. J Environ Biol 2015; 36 Spec No:813-820. [PMID: 26387356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Wastewater contaminated by sulfur, nitrogen and carbon compounds was treated by sulfide-based denitrification process in an expanded granular sludge bed packed with porous sponge. In influent, nitrate and nitrite served as electron acceptors, while sulfide and organic carbon served as electron donors. Both sulfide-based autotrophic denitrification and heterotrophic denitrification were found in the bioreactor. The percentage of heterotrophic denitrification was 36.5%, and the removal rates of sulfide, nitrate, nitrite and organic carbon were 99%, 99%, 95.5% and 80% respectively, which actualized the simultaneous mixotrophic denitrification and desulfurization. The effect factors such as organic carbon category, organic carbon loading rate and nitrite loading rate were also investigated. The 50 mg Cl(-1)d(-1) of glucose and 25 mg Cl(-1) d(-1) acetate sodium were found good for sulfide-based denitrification, while the suitable loading rate of nitrite was 50 mg Nl(-1)d(-1).
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Daengrot C, Rukachaisirikul V, Tansakul C, Thongpanchang T, Phongpaichit S, Bowornwiriyapan K, Sakayaroj J. Eremophilane Sesquiterpenes and Diphenyl Thioethers from the Soil Fungus Penicillium copticola PSU-RSPG138. J Nat Prod 2015; 78:615-622. [PMID: 25734623 DOI: 10.1021/np5005328] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Four new compounds including two eremophilane sesquiterpenes, penicilleremophilanes A (1) and B (2), as well as two sulfur-containing biphenols, penicillithiophenols A (3) and B (4), were isolated from the soil fungus Penicillium copticola PSU-RSPG138 together with 16 known compounds. Their structures were elucidated by spectroscopic methods. Known sporogen AO-1 exhibited significant antimalarial activity against Plasmodium falciparum with an IC50 value of 1.53 μM and cytotoxic activity to noncancerous (Vero) cell lines with an IC50 value of 4.23 μM. Although compound 1 was approximately half as active against P. falciparum with the IC50 value of 3.45 μM, it showed much weaker cytotoxic activity.
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Affiliation(s)
- Charuwan Daengrot
- †Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Vatcharin Rukachaisirikul
- †Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Chittreeya Tansakul
- †Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Tienthong Thongpanchang
- ‡Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Souwalak Phongpaichit
- §Natural Products Research Center of Excellence and Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Kawitsara Bowornwiriyapan
- §Natural Products Research Center of Excellence and Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Jariya Sakayaroj
- ⊥National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Khlong Luang, Pathum Thani 12120, Thailand
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Wang X, Zhang Y, Zhou J, Zhang T, Chen M. Regeneration of elemental sulfur in a simultaneous sulfide and nitrate removal reactor under different dissolved oxygen conditions. Bioresour Technol 2015; 182:75-81. [PMID: 25682226 DOI: 10.1016/j.biortech.2015.01.123] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/22/2015] [Accepted: 01/28/2015] [Indexed: 06/04/2023]
Abstract
A continuous reactor in microaerobic conditions was adopted for sulfide-oxidizing, nitrate-reducing and elemental sulfur (S(0)) regenerating, simultaneously. The results showed that appropriate dissolved oxygen (DO) enhanced S(0) regeneration efficiency, sulfide oxidation efficiency, and nitrate reduction efficiency. When the DO concentration was 0.1-0.3 mg L(-1), the microaerobic bioreactor simultaneously converted 8.16 kg-Sm(-3)d(-1) of sulfide to S(0) and 2.48 kg-Nm(-3)d(-1) of nitrate to nitrogen with the sulfide and nitrate removal efficiency of 100% and 90% respectively. Compared with anaerobic sulfide and nitrate removal process previously reported, the loading sulfide was higher and more S(0) was generated during the operation in microaerobic reactor. Analysis using the 16S rDNA gene clone library revealed that Azoarcus, Thauera, Paracoccus, Sulfurospirillum, Arcobacter and Clostridium were the dominant microorganisms in the sulfide and nitrate removal system.
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Affiliation(s)
- Xiaowei Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Yu Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Tingting Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Mingxiang Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
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31
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Garcia GPP, Diniz RCO, Bicalho SK, Franco VADS, Gontijo EMDO, Toscano RA, Canhestro KO, Santos MRD, Carmo ALRD, Lobato LCS, Brandt EMF, Chernicharo CAL, Calabria de Araujo J. Biological sulphide removal from anaerobically treated domestic sewage: reactor performance and microbial community dynamics. Environ Technol 2015; 36:2177-2189. [PMID: 25737383 DOI: 10.1080/09593330.2015.1024174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We developed a biological sulphide oxidation system and evaluated two reactors (shaped similar to the settler compartment of an up-flow anaerobic sludge blanket [UASB] reactor) with different support materials for biomass retention: polypropylene rings and polyurethane foam. The start-up reaction was achieved using microorganisms naturally occurring on the open surface of UASB reactors treating domestic wastewater. Sulphide removal efficiencies of 65% and 90% were achieved with hydraulic retention times (HRTs) of 24 and 12 h, respectively, in both reactors. However, a higher amount of elemental sulphur was formed and accumulated in the biomass from reactor 1 (20 mg S(0) g(-1) VTS) than in that from reactor 2 (2.9 mg S(0) g(-1) VTS) with an HRT of 24 h. Denaturing gradient gel electrophoresis (DGGE) results revealed that the the pink and green biomass that developed in both reactors comprised a diverse bacterial community and had sequences related to phototrophic green and purple-sulphur bacteria such as Chlorobium sp., Chloronema giganteum, and Chromatiaceae. DGGE band patterns also demonstrated that bacterial community was dynamic over time within the same reactor and that different support materials selected for distinct bacterial communities. Taken together, these results indicated that sulphide concentrations of 1-6 mg L(-1) could be efficiently removed from the effluent of a pilot-scale UASB reactor in two sulphide biological oxidation reactors at HRTs of 12 and 24 h, showing the potential for sulphur recovery from anaerobically treated domestic wastewater.
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Affiliation(s)
- Graziella Patrício Pereira Garcia
- a Department of Sanitary and Environmental Engineering , Universidade Federal de Minas Gerais (UFMG) , Av. Antonio Carlos 6627, Belo Horizonte , MG 31270-901 , Brazil
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32
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Meng LH, Zhang P, Li XM, Wang BG. Penicibrocazines A-E, five new sulfide diketopiperazines from the marine-derived endophytic fungus Penicillium brocae. Mar Drugs 2015; 13:276-87. [PMID: 25574740 PMCID: PMC4306937 DOI: 10.3390/md13010276] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 12/25/2014] [Indexed: 12/22/2022] Open
Abstract
Five new sulfide diketopiperazine derivatives, namely, penicibrocazines A–E (1–5), along with a known congener (6), were isolated and identified from the culture extract of Penicillium brocae MA-231, an endophytic fungus obtained from the fresh tissue of the marine mangrove plant Avicennia marina. The structures of these compounds were elucidated by detailed interpretation of NMR and mass spectroscopic data and the structures of compounds 1 and 3 were confirmed by single-crystal X-ray diffraction analysis. All these compounds were examined for cytotoxic and antimicrobial activities. Compounds 2–6 exhibited antimicrobial activity against some of the tested strains with MIC values ranging from 0.25 to 64 μg/mL.
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Affiliation(s)
- Ling-Hong Meng
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
| | - Peng Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
| | - Xiao-Ming Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
| | - Bin-Gui Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China.
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Liu T, Yuan J, Dong W, Wu H, Wang H. Effects on inorganic nitrogen compounds release of contaminated sediment treatment with in situ calcium nitrate injection. Environ Sci Pollut Res Int 2015; 22:1250-60. [PMID: 25135170 DOI: 10.1007/s11356-014-3421-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/07/2014] [Indexed: 05/24/2023]
Abstract
Notable releases of nitrate, nitrite, and ammonia are often observed in contaminated sediment treatment works implementing in situ calcium nitrate injection. In order to provide extended information for making best decision of employing this in situ sediment remediation technology, in this study the releases of nitrate, nitrite, and ammonia from the sediment after the calcium nitrate addition operation was investigated in column setups designed to simulate the scenarios of a stagnant water (e.g., a pound or small lake) and a tidal-influenced water (e.g., a river mouth), respectively. Comparison with published aquatic toxicity data or authorized criteria was conducted to assess if there is any toxic effect that might be induced. Along with the vigorous N2 emission due to the denitrification reactions which occurred in the treated sediment, external loaded nitrate, intermediately produced nitrite, and indigenous ammonia in the sediment showed being mobilized and released out. Their promoted release and fast buildup in the overlying water to an excessive level probably cause toxic effects to sensitive freshwater living species. Among them, the potential ecological risk induced by the promoted sediment ammonia release is the greatest, and cautions shall be raised for applying the calcium nitrate injection in ammonia-rich sediments. The caused impacts shall be less violent in a tidal-influenced water body, and comparatively, the continuous and fast accumulation of the released inorganic nitrogen compounds in a stagnant water body might impose severer influences to the ecosystem until being further transferred to less harmful forms.
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Affiliation(s)
- Tongzhou Liu
- Harbin Institute of Technology Shenzhen Graduate School, Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen, 518055, People's Republic of China
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Abstract
In this study, Fe(VI) was applied to treat three mine tailings containing different amounts of sulphides and heavy metals. Oxidation of sulphides by Fe(VI) was studied at pH 9.2 with variation of solid to solution ratio, Fe(VI) concentration and injection number of Fe(VI) solution. The major dissolved products from the treatment of mine tailings with Fe(VI) solution were sulphate and arsenic. Oxidation efficiency of sulphides was evaluated by reduction efficiency of Fe(VI) as well as by measurement of dissolved sulphate concentration. Even though inorganic composition of three mine tailings was different, reduction fraction of Fe(VI) was quite similar. This result can suggest that Fe(VI) was involved in several other reactions in addition to oxidation of sulphides. Oxidation of sulphides in mine tailing was greatly dependent on the total amount of sulphides as well as kinds of sulphides complexed with metals. Over the five consecutive injections of Fe(VI) solution, dissolved sulphate concentration was greatly decreased by each injection and no more dissolved sulphate was observed at the fifth injection. While dissolved arsenic was decreased lineally up to the fifth injection. Sulphate generation was slightly increased for all mine tailings as Fe(VI) concentration was increased; however, enhancement of oxidation efficiency of sulphides was not directly proportional to the initial Fe(VI) concentration.
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Affiliation(s)
- Yong-Hoon Lee
- a Department of Environmental Engineering , Kwangwoon University , Seoul 139-701 , Korea
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35
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Deng SY, Zhang T, Shan D, Wu XY, Dou YZ, Cosnier S, Zhang XJ. Unusual Fe(CN)₆³⁻/⁴⁻ capture induced by synergic effect of electropolymeric cationic surfactant and graphene: characterization and biosensing application. ACS Appl Mater Interfaces 2014; 6:21161-21166. [PMID: 25409412 DOI: 10.1021/am506057d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Herein, a special microheterogeneous system for Fe(CN)6(3-/4-) capture was constructed based on graphene (GN) and the electropolymeric cationic surfactant, an amphiphilic pyrrole derivative, (11-pyrrolyl-1-yl-undecyl) triethylammonium tetrafluoroborate (A2). The morphology of the system was characterized by scanning electron microscope. The redox properties of the entrapped Fe(CN)6(3-/4-) were investigated by cyclic voltammetry and UV-visible spectrometry. The entrapped Fe(CN)6(3-/4-) exhibited highly electroactive with stable and symmetrical cyclic voltammetric signal. A dramatic negative shift in the half wave potential can be obtained due to the unusual Fe(CN)6(3-/4-) partitioning in in this microheterogeneous system based on poly(A2+GN). Finally, the entrapped Fe(CN)6(3-/4-) was applied in the construction of the enhanced biosensors to hydrogen peroxide and sulfide.
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Affiliation(s)
- Sheng-Yuan Deng
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, China
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36
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Chandler GT, Schlekat CE, Garman ER, He L, Washburn KM, Stewart ER, Ferry JL. Sediment nickel bioavailability and toxicity to estuarine crustaceans of contrasting bioturbative behaviors--an evaluation of the SEM-AVS paradigm. Environ Sci Technol 2014; 48:12893-12901. [PMID: 25313978 DOI: 10.1021/es5025977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Robust sediment quality criteria require chemistry and toxicity data predictive of concentrations where population/community response should occur under known geochemical conditions. Understanding kinetic and geochemical effects on toxicant bioavailability is key, and these are influenced by infaunal sediment bioturbation. This study used fine-scale sediment and porewater measurement of contrasting infaunal effects on carbon-normalized SEM-AVS to evaluate safe or potentially toxic nickel concentrations in a high-binding Spartina saltmarsh sediment (4%TOC; 35-45 μmol-S2-·g(-1)). Two crustaceans producing sharply contrasting bioturbation--the copepod Amphiascus tenuiremis and amphipod Leptocheirus plumulosus--were cultured in oxic to anoxic sediments with SEM[Ni]-AVS, TOC, porewater [Ni], and porewater DOC measured weekly. From 180 to 750 μg-Ni·g(-1) sediment, amphipod bioturbation reduced [AVS] and enhanced porewater [Ni]. Significant amphipod uptake, mortality, and growth-depression occurred at the higher sediment [Ni] even when [SEM-AVS]/foc suggested acceptable risk. Less bioturbative copepods produced higher AVS and porewater DOC but exhibited net population growth despite porewater [Ni] 1.3-1.7× their aqueous [Ni] LOEC. Copepod aqueous tests with/without dissolved organic matter showed significant aqueous DOC protection, which suggests porewater DOC attenuates sediment Ni toxicity. The SEM[Ni]-AVS relationship was predictive of acceptable risk for copepods at the important population-growth level.
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Affiliation(s)
- G Thomas Chandler
- Department of Environmental Health Sciences, Norman J. Arnold School of Public Health, University of South Carolina , Columbia, South Carolina 29208, United States
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37
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Lee DJ, Wong BT. Denitrifying sulfide removal by enriched microbial consortium: kinetic diagram. Bioresour Technol 2014; 164:386-393. [PMID: 24874878 DOI: 10.1016/j.biortech.2014.05.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 05/02/2014] [Accepted: 05/04/2014] [Indexed: 06/03/2023]
Abstract
Denitrifying sulfide removal (DSR) process simultaneously removes nitrate, sulfide and organic matters in the same reactor. This study isolated eight DSR strains and composed a microbial consortium to reveal the stoichiometry and kinetics of autotrophic, heterotrophic and mixotrophic denitrification (DSR). A novel kinetic diagram based on mass and electron balances was proposed to graphically interpret the system kinetics and identify the accessible regime where DSR reactions can be applied. Demonstration of the use of the proposed diagram showed the easy assessment of DSR system performance by the status on the diagram.
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Affiliation(s)
- Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Biing-Teo Wong
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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Villa-Gomez DK, Cassidy J, Keesman KJ, Sampaio R, Lens PNL. Sulfide response analysis for sulfide control using a pS electrode in sulfate reducing bioreactors. Water Res 2014; 50:48-58. [PMID: 24361702 DOI: 10.1016/j.watres.2013.10.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 10/02/2013] [Accepted: 10/02/2013] [Indexed: 06/03/2023]
Abstract
Step changes in the organic loading rate (OLR) through variations in the influent chemical oxygen demand (CODin) concentration or in the hydraulic retention time (HRT) at constant COD/SO4(2-) ratio (0.67) were applied to create sulfide responses for the design of a sulfide control in sulfate reducing bioreactors. The sulfide was measured using a sulfide ion selective electrode (pS) and the values obtained were used to calculate proportional-integral-derivative (PID) controller parameters. The experiments were performed in an inverse fluidized bed bioreactor with automated operation using the LabVIEW software version 2009(®). A rapid response and high sulfide increment was obtained through a stepwise increase in the CODin concentration, while a stepwise decrease to the HRT exhibited a slower response with smaller sulfide increment. Irrespective of the way the OLR was decreased, the pS response showed a time-varying behavior due to sulfide accumulation (HRT change) or utilization of substrate sources that were not accounted for (CODin change). The pS electrode response, however, showed to be informative for applications in sulfate reducing bioreactors. Nevertheless, the recorded pS values need to be corrected for pH variations and high sulfide concentrations (>200 mg/L).
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Affiliation(s)
- D K Villa-Gomez
- Chair Group Pollution Prevention and Resource Recovery, UNESCO-IHE Institute for Water Education, P.O. Box 3015, 2601 DA Delft, The Netherlands.
| | - J Cassidy
- Chair Group Pollution Prevention and Resource Recovery, UNESCO-IHE Institute for Water Education, P.O. Box 3015, 2601 DA Delft, The Netherlands
| | - K J Keesman
- Systems and Control Group, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - R Sampaio
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - P N L Lens
- Chair Group Pollution Prevention and Resource Recovery, UNESCO-IHE Institute for Water Education, P.O. Box 3015, 2601 DA Delft, The Netherlands
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Xu X, Chen C, Wang A, Guo W, Zhou X, Lee DJ, Ren N, Chang JS. Simultaneous removal of sulfide, nitrate and acetate under denitrifying sulfide removal condition: modeling and experimental validation. J Hazard Mater 2014; 264:16-24. [PMID: 24275469 DOI: 10.1016/j.jhazmat.2013.10.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 10/22/2013] [Accepted: 10/24/2013] [Indexed: 06/02/2023]
Abstract
Simultaneous removal of sulfide (S(2-)), nitrate (NO3(-)) and acetate (Ac(-)) under denitrifying sulfide removal process (DSR) is a novel biological wastewater treatment process. This work developed a mathematical model to describe the kinetic behavior of sulfur-nitrogen-carbon and interactions between autotrophic denitrifiers and heterotrophic denitrifiers. The kinetic parameters of the model were estimated via data fitting considering the effects of initial S(2-) concentration, S(2-)/NO3(-)-N ratio and Ac(-)-C/NO3(-)-N ratio. Simulation supported that the heterotrophic denitratation step (NO3(-) reduction to NO2(-)) was inhibited by S(2-) compared with the denitritation step (NO2(-) reduction to N2). Also, the S(2-) oxidation by autotrophic denitrifiers was shown two times lower in rate with NO2(-) as electron acceptor than that with NO3(-) as electron acceptor. NO3(-) reduction by autotrophic denitrifiers occurs 3-10 times slower when S(0) participates as final electron donor compared to the S(2-)-driven pathway. Model simulation on continuous-flow DSR reactor suggested that the adjustment of hydraulic retention time is an efficient way to make the reactor tolerating high S(2-) loadings. The proposed model properly described the kinetic behaviors of DSR processes over wide parametric ranges and which can offer engineers with basis to optimize bioreactor operation to improve the treatment capacity.
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Affiliation(s)
- Xijun Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Aijie Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wanqian Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xu Zhou
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Duu-Jong Lee
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Jo-Shu Chang
- Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, Taiwan
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40
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Abstract
Our current natural product program researches the second metabolites of a fungus Penicilliumcrustosum YN-HT-15 isolated from the red soil (Yunnan Province, China), to discover potential antitumor chemical entities. Two new compounds were isolated from the ethyl acetate extract of the fermentation broth of the fungus, and their structures were characterized as 1-(2',4'-dihydroxy-5'-methyl-3'-methylsulfanylmethyl-phenyl)-ethanone and R-3-(3'-acetyl-2',6'-dihydroxy-5'-methylphenyl)-2-methyl-propionic acid methyl ester on the basis of spectroscopic data.
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Affiliation(s)
- Yan-Ping Liu
- a School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University , Shenyang , 110016 , China
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41
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Jiang G, Keating A, Corrie S, O'halloran K, Nguyen L, Yuan Z. Dosing free nitrous acid for sulfide control in sewers: results of field trials in Australia. Water Res 2013; 47:4331-4339. [PMID: 23764584 DOI: 10.1016/j.watres.2013.05.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 04/10/2013] [Accepted: 05/10/2013] [Indexed: 06/02/2023]
Abstract
Intermittent dosing of free nitrous acid (FNA), with or without the simultaneous dosing of hydrogen peroxide, is a new strategy developed recently for the control of sulfide production in sewers. Six-month field trials have been carried out in a rising main sewer in Australia (150 mm in diameter and 1080 m in length) to evaluate the performance of the strategy that was previously demonstrated in laboratory studies. In each trial, FNA was dosed at a pumping station for a period of 8 or 24 h, some with simultaneous hydrogen peroxide dosing. The sulfide control effectiveness was monitored by measuring, on-line, the dissolved sulfide concentration at a downstream location of the pipeline (828 m from the pumping station) and the gaseous H2S concentration at the discharge manhole. Effective sulfide control was achieved in all nine consecutive trials, with sulfide production reduced by more than 80% in 10 days following each dose. Later trials achieved better control efficiency than the first few trials possibly due to the disrupting effects of FNA on sewer biofilms. This suggests that an initial strong dose (more chemical consumption) followed by maintenance dosing (less chemical consumption) could be a very cost-effective way to achieve consistent control efficiency. It was also found that heavy rainfall slowed the recovery of sulfide production after dosing, likely due to the dilution effects and reduced retention time. Overall, intermittent dose of FNA or FNA in combination with H2O2 was successfully demonstrated to be a cost-effective method for sulfide control in rising main sewers.
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Affiliation(s)
- Guangming Jiang
- Advanced Water Management Centre, The University of Queensland, QLD, Australia.
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42
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De la Torre-Velasco A, Beristain-Cardoso R, Damian-Matsumura P, Gómez J. Sequential nitrification-denitrification process for nitrogenous, sulfurous and phenolic compounds removal in the same bioreactor. Bioresour Technol 2013; 139:220-225. [PMID: 23665217 DOI: 10.1016/j.biortech.2013.03.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/29/2013] [Accepted: 03/31/2013] [Indexed: 06/02/2023]
Abstract
The kinetic and metabolic behavior of an aerobic granular sludge to nitrify, denitrify and nitrify-denitrify was evaluated in batch cultures. In nitrification control, ammonium, 4-methylphenol and sulfide were consumed efficiently (∼100%) and recovered as NO3(-), CO2, S(0) and SO4(2-), respectively. In denitrification control, S(0) and nitrate were efficiently consumed and recovered as SO4(2-) and N2, respectively. Sequential nitrification-denitrification process was evaluated by applying oxic/anoxic conditions. Ammonium, 4-methylphenol and sulfide were oxidized to nitrate, CO2 and mainly S(0), respectively, under aerobic conditions. After that, anoxic conditions were established where S(0) reduced all nitrate to N2, with molecular nitrogen yield (YN2) of 1.03 ± 0.06 mg/mg NH4(+)-N consumed. This is the first study to show the capability of an aerobic granular sludge in simultaneous removal of ammonium, 4-methylphenol and sulfide by sequential nitrification-denitrification process in the same bioreactor.
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Affiliation(s)
- A De la Torre-Velasco
- Universidad Autónoma Metropolitana-Iztapalapa, Department of Biotechnology, Av., San Rafael Atlixco 186, C.P. 09340, Mexico
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Chen J, Pan X, Chen J. Regeneration of activated carbon saturated with odors by non-thermal plasma. Chemosphere 2013; 92:725-730. [PMID: 23648327 DOI: 10.1016/j.chemosphere.2013.04.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 04/07/2013] [Accepted: 04/10/2013] [Indexed: 06/02/2023]
Abstract
The dielectric barrier discharge (DBD) regeneration process of an activated carbon (AC) saturated with dimethyl sulfide was studied on a laboratory scale. The results showed sustainable high regeneration efficiency (RE) (>90%) in successive regeneration cycles (10 cycles). Energy density, humidity and oxygen content were key factors for DBD system, with optimum conditions of 761JL(-1), 0-1vol% and 5%, respectively. The high efficiency was likely attributed to the improvement of structure and surface properties of AC by DBD. After the first regeneration, surface area, micropore volume and total pore volume of AC increased by 8%, 23% and 15% respectively, while average pore size decreased by 9.5%. The number of carboxylic groups doubled (from 0.22 to 0.48mmolg(-1)) while that of phenolic groups remarkably decreased (from 0.48 to 0.26mmolg(-1)) after successive regeneration cycles, which helped to maintain high RE. The results suggested DBD as a novel, efficient alternative process for odor-saturated AC regeneration.
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Affiliation(s)
- Jie Chen
- Institute of Environment Science & Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China.
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Zhang J, Zhang B, Tian C, Ye Z, Liu Y, Lei Z, Huang W, Feng C. Simultaneous sulfide removal and electricity generation with corn stover biomass as co-substrate in microbial fuel cells. Bioresour Technol 2013; 138:198-203. [PMID: 23612180 DOI: 10.1016/j.biortech.2013.03.167] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 03/22/2013] [Accepted: 03/24/2013] [Indexed: 06/02/2023]
Abstract
Microbial fuel cells (MFCs), representing a promising method to treat combined pollutants with energy recovery, were utilized to remove sulfide and recover power with corn stover filtrate (CSF) as the co-substrate in present study. A maximum power density of 744 mW/m(2) was achieved with sulfide removal of 91% during 72 h operation when the CSF concentrations (mg-COD/l) and the electrolyte conductivity were set at 800 mg/l and 10.06 mS/cm, respectively, while almost 52% COD was removed due to the microbial degradation of CSF to the volatile organic carbons. CSF concentrations and electrolyte conductivities had significant effects on the performance of the MFCs. Simultaneous removals of inorganic pollutant and complex organic compounds with electricity generation in MFCs are reported for the first time. These results provide a good reference for multiple contaminations treatment especially sulfide containing wastewaters based on the MFC technology.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences Beijing, Ministry of Education, Beijing 100083, China
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45
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Ma XY, Zhang ZH, Wang HY, Hu SF, Li QS. [Simultaneous removal of algae and its odorous metabolite dimethyl trisulfide in water by potassium ferrate]. Huan Jing Ke Xue 2013; 34:1767-1772. [PMID: 23914526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Co-removal of oscillatoria algae and its potential odorous metabolite dimethyl trisulfide (DMTS) in simulated algae-laden alkaline source water by potassium ferrate (K2FeO4) was investigated in contrast to potassium permanganate (KMnO4) pre-oxidation followed by polyferric chloride (PFC) under varying conditions, including pH, initial oxidant dosage and turbidity. Based on the pre-comparison with PFC, the optimal dosage of PFC in the combined KMnO4 pre-oxidation-PFC treatment was determined. Potassium ferrate resulted in 92.4% removal of algae, higher than PFC when the dosage was equivalent as measured by Fe and KMnO4 showed obviously positive effect as a coagulation aid. Degradation of dimethyl trisufide (92.5%) by potassium ferrate was better than the pre-oxidation of potassium permanganate (74.6%), and the treatment time was decreased from 10 min to 1 min.
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Affiliation(s)
- Xiao-yan Ma
- Architecture Engineering College, Zhejiang University of Technology, Hangzhou 310014, China.
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46
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Yu H, Wang AJ, Chen C. [Structure and dynamics of microbial community in the denitrifying sulfide removal process]. Huan Jing Ke Xue 2013; 34:1190-1195. [PMID: 23745433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In order to investigate the relationship between the structure of microbial community and the operational efficiency of the denitrifying sulfide removal (DSR) process, whole genomic DNA was extracted from sludge samples at each operational stage. Functional gene arrays (FGAs), a high throughput metagenomic technology, was employed to characterize the change of microbial community structure in DSR process. The results of diversity indices (Simpson and Shannon indices) and clustering showed that the microbial community structure changed greatly with stages according to the operational conditions. In stage I and II, diversity indices and richness decreased due to acclimation of the microbial community to the environment, whereas they increased notably according to the maturing of sludge which may indicate that the bioreactor entered the steady stage. Analysis of key functional genes showed that the abundance of genes did not only reflect the activities of functional bacteria but also had a close relationship with the reactor performance.
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Affiliation(s)
- Hao Yu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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47
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Cai J, Zheng P, Zhang J, Xie Z, Li W, Sun P. Simultaneous anaerobic sulfide and nitrate removal coupled with electricity generation in Microbial Fuel Cell. Bioresour Technol 2013; 129:224-228. [PMID: 23247150 DOI: 10.1016/j.biortech.2012.11.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/30/2012] [Accepted: 11/01/2012] [Indexed: 06/01/2023]
Abstract
Two-chamber Microbial Fuel Cells (MFC) using graphite rods as electrodes were operated for simultaneous anaerobic sulfide and nitrate removal coupled with electricity generation. The MFC showed good ability to remove substrates. When the influent sulfide and nitrate concentrations were 780 mg/L and 135.49 mg/L, respectively, the removal percentages of sulfide and nitrate were higher than 90% and the main end products were nitrogen and sulfate. The MFC also showed good ability to generate electricity, and the voltage went up with the rise of influent substrate concentrations. When the external resistance was 1000 Ω, its highest steady voltage was 71 mV. Based on the linear relationship between the electrons released by substrates and accepted by electrode, it was concluded that the electricity generation was coupled with the substrate conversion in the MFC.
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Affiliation(s)
- Jing Cai
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
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48
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Liu Y, Ganigué R, Sharma K, Yuan Z. Controlling chemical dosing for sulfide mitigation in sewer networks using a hybrid automata control strategy. Water Sci Technol 2013; 68:2584-2590. [PMID: 24355844 DOI: 10.2166/wst.2013.525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Chemicals such as magnesium hydroxide (Mg(OH)2) and iron salts are widely used to control sulfide-induced corrosion in sewer networks composed of interconnected sewer pipe lines and pumping stations. Chemical dosing control is usually non-automatic and based on experience, thus often resulting in sewage reaching the discharge point receiving inadequate or even no chemical dosing. Moreover, intermittent operation of pumping stations makes traditional control theory inadequate. A hybrid automata-based (HA-based) control method is proposed in this paper to coordinate sewage pumping station operations by considering their states, thereby ensuring suitable chemical concentrations in the network discharge. The performance of the proposed control method was validated through a simulation study of a real sewer network using real sewage flow data. The physical, chemical and biological processes were simulated using the well-established SeweX model. The results suggested that the HA-based control strategy significantly improved chemical dosing control performance and sulfide mitigation in sewer networks, compared to the current common practice.
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Affiliation(s)
- Yiqi Liu
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia E-mail: ; School of Automation Science & Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Ramon Ganigué
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia E-mail:
| | - Keshab Sharma
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia E-mail:
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Brisbane QLD 4072, Australia E-mail:
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Jan CR, Lo HR, Chen CY, Kuo SY. Effect of allyl sulfides from garlic essential oil on intracellular ca2+ levels in renal tubular cells. J Nat Prod 2012; 75:2101-2107. [PMID: 23163425 DOI: 10.1021/np3005248] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Diallyl sulfide (1), diallyl disulfide (2), and diallyl trisulfide (3), which are major organosulfur compounds of garlic (Allium sativum), are recognized as a group of potential chemopreventive compounds. In this study, the early signaling effects of 3 were examined on Madin-Darby canine kidney (MDCK) cells loaded with the Ca(2+)-sensitive dye fura-2. It was found that 3 caused an immediate and sustained increase of [Ca(2+)](i) in a concentration-dependent manner (EC(50) = 40 μM). Compound 3 also induced a [Ca(2+)](i) elevation when extracellular Ca(2+) was removed, but the magnitude was reduced by 45%. In Ca(2+)-free medium, the 3-induced [Ca(2+)](i) level was abolished by depleting stored Ca(2+) with 1 μM thapsigargin (an endoplasmic reticulum Ca(2+) pump inhibitor). Elevation of [Ca(2+)](i) caused by 3 in the Ca(2+)-containing medium was not affected by modulation of protein kinase C activity. The 3-induced Ca(2+) influx was inhibited by nifedipine and nicardipine (1 μM). U73122, an inhibitor of phospholipase C, abolished ATP (but not the 3-induced [Ca(2+)](i) level). These findings suggest that 3 induced a significant [Ca(2+)](i) elevation in MDCK renal tubular cells by stimulating both extracellular Ca(2+) influx and thapsigargin-sensitive intracellular Ca(2+) release via as yet unidentified mechanisms. Furthermore, the order of the allyl sulfide-induced [Ca(2+)](i) elevation and cell viability was 1 < 2 < 3. The differential effect of allyl sulfides on Ca(2+) signaling and cell death appears to correlate with the number of sulfur atoms in the structure of these allyl sulfides.
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Affiliation(s)
- Chung-Ren Jan
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan
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Chen C, Zhou X, Wang A, Wu DH, Liu LH, Ren N, Lee DJ. Elementary sulfur in effluent from denitrifying sulfide removal process as adsorbent for zinc(II). Bioresour Technol 2012; 121:441-444. [PMID: 22850176 DOI: 10.1016/j.biortech.2012.06.117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Revised: 05/30/2012] [Accepted: 06/01/2012] [Indexed: 06/01/2023]
Abstract
The denitrifying sulfide removal (DSR) process can simultaneously convert sulfide, nitrate and organic compounds into elementary sulfur (S(0)), di-nitrogen gas and carbon dioxide, respectively. However, the S(0) formed in the DSR process are micro-sized colloids with negatively charged surface, making isolation of S(0) colloids from other biological cells and metabolites difficult. This study proposed the use of S(0) in DSR effluent as a novel adsorbent for zinc removal from wastewaters. Batch and continuous tests were conducted for efficient zinc removal with S(0)-containing DSR effluent. At pH<7.5, removal rates of zinc(II) were increased with increasing pH. The formed S(0) colloids carried negative charge onto which zinc(II) ions could be adsorbed via electrostatic interactions. The zinc(II) adsorbed S(0) colloids further enhanced coagulation-sedimentation efficiency of suspended solids in DSR effluents. The DSR effluent presents a promising coagulant for zinc(II) containing wastewaters.
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Affiliation(s)
- Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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