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Zheng X, Lin H, Du D, Li G, Alam O, Cheng Z, Liu X, Jiang S, Li J. Remediation of heavy metals polluted soil environment: A critical review on biological approaches. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 284:116883. [PMID: 39173222 DOI: 10.1016/j.ecoenv.2024.116883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 08/03/2024] [Accepted: 08/11/2024] [Indexed: 08/24/2024]
Abstract
Heavy metals (HMs) pollution is a globally emerging concern. It is difficult to cost-effectively combat such HMs polluted soil environments. The efficient remediation of HMs polluted soil is crucial to protect human health and ecological security that could be carried out by several methods. Amidst, biological remediation is the most affordable and ecological. This review focused on the principles, mechanisms, performances, and influential factors in bioremediation of HMs polluted soil. In microbial remediation, microbes can alter metallic compounds in soils. They transform these compounds into their metabolism through biosorption and bioprecipitation. The secreted microbial enzymes act as transformers and assist in HMs immobilization. The synergistic microbial effect can further improve HMs removal. In bioleaching, the microbial activity can simultaneously produce H2SO4 or organic acids and leach HMs. The production of acids and the metabolism of bacteria and fungi transform metallic compounds to soluble and extractable form. The key bioleaching mechanisms are acidolysis, complexolysis, redoxolysis and bioaccumulation. In phytoremediation, hyperaccumulator plants and their rhizospheric microbes absorb HMs by roots through absorption, cation exchange, filtration, and chemical changes. Then they exert different detoxification mechanisms. The detoxified HMs are then transferred and accumulated in their harvestable tissues. Plant growth-promoting bacteria can promote phytoremediation efficiency; however, use of chelants have adverse effects. There are some other biological methods for the remediation of HMs polluted soil environment that are not extensively practiced. Finally, the findings of this review will assist the practitioners and researchers to select the appropriate bioremediation approach for a specific soil environment.
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Affiliation(s)
- Xiaojun Zheng
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Hongjun Lin
- Jiangsu Xianghe Agricultural Development Co. LTD, Lianyungang, Jiangsu 222048, China
| | - Daolin Du
- Jingjiang College, Institute of Environment and Ecology, School of the Environment and Safety Engineering, School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Guanlin Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Ohidul Alam
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Zheng Cheng
- Jiangsu Xianghe Agricultural Development Co. LTD, Lianyungang, Jiangsu 222048, China
| | - Xinlin Liu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shan Jiang
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
| | - Jian Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China.
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Luo Y, Liao M, Lu X, Xu N, Xie X, Gao W. Unveiling the performance of a novel alkalizing bacterium Enterobacter sp. LYX-2 in immobilization of available Cd. J Environ Sci (China) 2024; 137:245-257. [PMID: 37980012 DOI: 10.1016/j.jes.2023.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 02/04/2023] [Accepted: 02/07/2023] [Indexed: 11/20/2023]
Abstract
A novel alkalizing strain Enterobacter sp. LYX-2 that could resist 400 mg/L Cd was isolated from Cd-contaminated soil, which immobilized 96.05% Cd2+ from medium. Cd distribution analysis demonstrated that more than half of the Cd2+ was converted into extracellular precipitated Cd through mobilization of the alkali-producing mechanism by the strain LYX-2, achieving the high immobilization efficiency of Cd2+. Biosorption experiments revealed that strain LYX-2 had superior biosorption capacity of 48.28 mg/g for Cd. Pot experiments with Brassica rapa L. were performed with and without strain LYX-2. Compared to control, 15.92% bioavailable Cd was converted to non-bioavailable Cd and Cd content in aboveground vegetables was decreased by 37.10% with addition of strain LYX-2. Available Cd was mainly immobilized through extracellular precipitation, cell-surface biosorption and intracellular accumulation of strain LYX-2, which was investigated through Cd distribution, Scanning Electron Microscope and Energy-Dispersive X-ray Spectroscopy (SEM-EDS), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Photoelectron Spectroscopy (XPS) and Transmission Electron Microscopy (TEM) analysis. In addition, the application of strain LYX-2 significantly promoted the growth of vegetables about 2.4-fold. Above results indicated that highly Cd-resistant alkalizing strain LYX-2, as a novel microbial passivator, had excellent ability and reuse value to achieve the remediation of Cd-contaminated soil coupled with safe production of vegetables simultaneously.
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Affiliation(s)
- Yixin Luo
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Hangzhou 310058, China
| | - Min Liao
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Hangzhou 310058, China.
| | - Xiongxiong Lu
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Hangzhou 310058, China
| | - Na Xu
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Hangzhou 310058, China
| | - Xiaomei Xie
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China; National Demonstration Center for Experimental Environmental and Resources Education, Zhejiang University, Hangzhou 310058, China.
| | - Weiming Gao
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China; National Demonstration Center for Experimental Environmental and Resources Education, Zhejiang University, Hangzhou 310058, China
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Chen X, Cai S, Zhang N, Yang J, Peng T, Yang F. Biosorption of U(VI) and mechanisms by live and dead cells of Sphingopyxis sp. YF1. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:109469-109480. [PMID: 37924175 DOI: 10.1007/s11356-023-29881-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 09/10/2023] [Indexed: 11/06/2023]
Abstract
Heavy metal pollution seriously threatens the environment and human health. The biosorption of heavy metals has attracted worldwide attention due to its cost-effectiveness and environmental friendliness. It is significant to develop biosorbents with excellent adsorption performance. Sphingopyxis is widely used in the removal of various organic pollutants, but its potential application in heavy metal adsorption has been largely overlooked. This study investigates the biosorption of U(VI) onto live and dead cells of a Sphingopyxis strain YF1. The effects of pH, contact time and initial ion concentration on U(VI) adsorption investigated, and kinetic and isothermal models were used to fit the adsorption results. The results show that under pH 3-6, the adsorption of U(VI) by YF1 live cells increased with the increase of the pH. Both the pseudo-first order and pseudo-second order models can satisfactorily interpret the adsorption by live and dead cells. Three isothermal adsorption models (Langmuir, Freundlich, and Sips) were used to fit the adsorption process. The adsorption of uranium by live and dead cells was best fitted by the Sips model. The maximal adsorption capacities of U(VI) by live and dead cells were 140.7 mg g-1 and 205.7 mg g-1, respectively. The mechanisms of U(VI) adsorption by Sphingopyxis sp. YF1 were revealed. Scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS) show that U(VI) was deposited on the surface of the bacterial cells. Fourier-transform infrared spectroscopy (FTIR) shows that amine, hydroxyl, alkyl, amide I, amide II, phosphate, carboxylates and carboxylic acids were the major functional groups that are involved in U(VI) adsorption by live and dead cells. X-ray photoelectron spectroscopy (XPS) suggests that the main functional groups of live cells involved in adsorption were O = C-O, C-OH/C-O-C and N-C = O. This study indicates Sphingopyxis sp. YF1 is a high-efficiency U(VI)-adsorbing strain, promising to remove U(VI) from aquatic environment.
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Affiliation(s)
- Xinxin Chen
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Siheng Cai
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Nan Zhang
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Jieqiu Yang
- School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Tangjian Peng
- Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Fei Yang
- Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang, China.
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, China.
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Li X, Xiao Q, Shao Q, Li X, Kong J, Liu L, Zhao Z, Li R. Adsorption of Cd (II) by a novel living and non-living Cupriavidus necator GX_5: optimization, equilibrium and kinetic studies. BMC Chem 2023; 17:54. [PMID: 37316907 DOI: 10.1186/s13065-023-00977-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 05/30/2023] [Indexed: 06/16/2023] Open
Abstract
Biosorbents have been extensively studied for heavy metal adsorption due to their advantages of low cost and high efficiency. In the study, the living and non-living biomass of Cupriavidus necator GX_5 previously isolated were evaluated for their adsorption capacity and/or removal efficiency for Cd (II) through batch experiments, SEM and FT-IR investigations. The maximum removal efficiency rates for the live and dead biomass were 60.51% and 78.53%, respectively, at an optimum pH of 6, a dosage of 1 g/L and an initial Cd (II) concentration of 5 mg/L. The pseudo-second-order kinetic model was more suitable for fitting the experimental data, indicating that the rate-limiting step might be chemisorption. The Freundlich isotherm model fit better than the Langmuir isotherm model, implying that the adsorption process of both biosorbents was heterogeneous. FT-IR observation reflected that various functional groups were involved in Cd (II) adsorption: -OH, -NH, C=O, C-O and C-C groups for the living biomass and -OH, -NH, C-H, C = O, C-N and N-H groups for the dead biomass. Our results imply that non-living biosorbents have a higher capacity and stronger strength for absorbing Cd (II) than living biomass. Therefore, we suggest that dead GX_5 is a promising adsorbent and can be used in Cd (II)-contaminated environments.
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Affiliation(s)
- Xingjie Li
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China.
- Engineering Technology Research Center of Jiangxi Universities and Colleges for Selenium Agriculture, Yichun, 336000, China.
- Key Laboratory of Crop Growth and Development Regulation of Jiangxi Province, Yichun, 336000, China.
| | - Qiusheng Xiao
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
- Engineering Technology Research Center of Jiangxi Universities and Colleges for Selenium Agriculture, Yichun, 336000, China
- Key Laboratory of Crop Growth and Development Regulation of Jiangxi Province, Yichun, 336000, China
| | - Qin Shao
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
| | - Xiaopeng Li
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
- Engineering Technology Research Center of Jiangxi Universities and Colleges for Selenium Agriculture, Yichun, 336000, China
| | - Jiejie Kong
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
| | - Liyan Liu
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
| | - Zhigang Zhao
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
- Engineering Technology Research Center of Jiangxi Universities and Colleges for Selenium Agriculture, Yichun, 336000, China
| | - Rungen Li
- College of Life Science and Environmental Resources, Yichun University, Yichun, 336000, China
- Key Laboratory of Crop Growth and Development Regulation of Jiangxi Province, Yichun, 336000, China
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Luo Y, Liao M, Zhang Y, Xu N, Xie X, Fan Q. Cadmium resistance, microbial biosorptive performance and mechanisms of a novel biocontrol bacterium Paenibacillus sp. LYX-1. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:68692-68706. [PMID: 35543785 DOI: 10.1007/s11356-022-20581-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 04/29/2022] [Indexed: 06/15/2023]
Abstract
In this study, a novel biocontrol bacterium was isolated and identified as Paenibacillus sp. LYX-1 from soils in the peach orchard. Both Cd2+ resistance and biosorption behavior of strain LYX-1 was explored. Meanwhile, the Cd2+ resistance and biosorption mechanisms were further identified by Cd-resistant genes, SEM-EDS, FTIR, XPS, and TEM analysis. The results showed that strain LYX-1 could resist 50 mg/L Cd2+ and had the CzcD gene responsible for Cd2+ efflux. Under pH 8.0 and at a dose of 1.0 g/L sorbent dose, the removal efficiencies of living and dead cells were as high as 90.39% and 75.67% at 20 mg/L Cd2+, respectively. For the adsorption isotherm test, results revealed that both Langmuir (R2 = 0.9704) and Freundlich (R2 = 0.9915) model could describe the Cd2+ biosorption well for living strain LYX-1. The maximum equilibrium biosorption capacities of living and dead biomass were 30.6790 and 24.3752 mg/g, respectively. In the adsorption kinetic test, the adsorption process of both living and dead strain LYX-1 all satisfied the pseudo-second kinetic equation. A desorption study showed that strain LYX-1 sorbents could be recycled and regenerated by eluents efficiently. SEM-EDS analysis reflected that Cd2+ was bound to the cell wall. Besides, the biosorption process was controlled by chemisorption with the participation of the -OH, -NH, -C = O, O = C-O, C-N, S2-, and phosphate functional groups on the cell surface of strain LYX-1, which were identified by FTIR and XPS. Bioaccumulation also made a contribution to the Cd2+ removal during the biosorption process of living sorbent. The above results indicated that strain LYX-1 had higher Cd2+ tolerance and Cd2+ removal capacity. This strain exhibits promising application to the removal of Cd2+ in the Cd-contaminated environment.
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Affiliation(s)
- Yixin Luo
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No. 866, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No. 866, Hangzhou, 310058, China
| | - Min Liao
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No. 866, Hangzhou, 310058, China.
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No. 866, Hangzhou, 310058, China.
| | - Yuhao Zhang
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No. 866, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No. 866, Hangzhou, 310058, China
| | - Na Xu
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No. 866, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No. 866, Hangzhou, 310058, China
| | - Xiaomei Xie
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No. 866, Hangzhou, 310058, China
- National Demonstration Center for Experimental Environmental and Resources Education (Zhejiang University), Yuhangtang Road No. 866, Hangzhou, 310058, China
| | - Qiyan Fan
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No. 866, Hangzhou, 310058, China
- National Demonstration Center for Experimental Environmental and Resources Education (Zhejiang University), Yuhangtang Road No. 866, Hangzhou, 310058, China
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6
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Ren Q, Gao J, Wang C. Effects of Heavy Metals on the Performance and Mechanism of Anaerobic Ammonium Oxidation for Treating Wastewater. FRONTIERS IN CHEMICAL ENGINEERING 2022. [DOI: 10.3389/fceng.2022.851822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Persistence of ammonium nitrogen and heavy metals in wastewater still remains a challenge, and many wastewater treatment plants face the challenge of removing nitrogen under heavy metal stresses. There is no preferred method for the biological treatment of wastewater containing nitrogen and heavy metals with the possible exception of the anaerobic ammonium oxidation (anammox), since it has shown promise for removing nitrogen under heavy metal stresses. This article reviews the recent research results of the nitrogen-removal performance and mechanism by the anammox process under heavy metal stresses, mainly discussing the enhancing and inhibition effects of heavy metals on the performance of the Anammox reactor. The influencing mechanism of heavy metals on the microbial community and extracellular polymeric substances is also presented, and examples are given for explanation. The main problems of the present research are pointed out, and it is proposed that unifying the metal ion concentrations of inhibiting or promoting anammox activity is necessary for the development and industrial application of the anammox process. The information of this review can offer a great possibility for achieving desired nitrogen removal in wastewater treatment under heavy metal stresses and with significant energy savings.
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Dai S, Chen Q, Jiang M, Wang B, Xie Z, Yu N, Zhou Y, Li S, Wang L, Hua Y, Tian B. Colonized extremophile Deinococcus radiodurans alleviates toxicity of cadmium and lead by suppressing heavy metal accumulation and improving antioxidant system in rice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 284:117127. [PMID: 33892465 DOI: 10.1016/j.envpol.2021.117127] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 03/09/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) and lead (Pb) are the major toxic heavy metals accumulated in rice and pose a serious threat to human health. The most important remediation strategy is to reduce the translocation of these heavy metals from polluted soil to rice. Bioremediation using microorganisms had been widely used for preventing environmental heavy metal pollution, and the interaction between microorganisms and plants is critical to reduce the heavy metal stress. In this study, we demonstrated that an extremophile Deinococcus radiodurans, especially its mutant strain-Δdr2577 which is deficient in cell surface-layer, could efficiently prevent the translocation and damages of Cd or Pb in rice. The bacterial cells efficiently removed Cd or Pb from culture medium. Following colonization of Δdr2577 cells in rice root, Cd level decreased to 71.6% in root and 60.9% in shoot, comparing to the plants treated with Cd alone; Pb level decreased to 73.3% in root and 56.9% in shoot, comparing to the plants treated with Pb alone. Meanwhile, the bacterial cells released their intracellular antioxidant-related molecules including glutamate and manganese ions into culture medium. Accumulation of glutamate and manganese ions detected in rice root and shoot ameliorate Cd/Pb-induced oxidative stress as indicated by reduced levels of ROS and enhanced activities of antioxidant enzymes in rice. Our results provide a potential application of an extremophile bacterium in alleviating heavy metal toxicity in rice. The main findings of the work reveal the interaction between the D. radiodurans and rice, as well as the alleviating mechanism of Cd and Pb toxicity through suppressing heavy metal accumulation and improving the antioxidant system in rice by the extremophile bacterium.
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Affiliation(s)
- Shang Dai
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Qi Chen
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Meng Jiang
- National Key Laboratory of Rice Biology, Institute of Crop Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Binqiang Wang
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Zhenming Xie
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Ning Yu
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yulong Zhou
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, China
| | - Shan Li
- National Key Laboratory of Rice Biology, Institute of Crop Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Liangyan Wang
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yuejin Hua
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Bing Tian
- MOE Key Laboratory of Biosystems Homeostasis & Protection, College of Life Sciences, Zhejiang University, Hangzhou, China; Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, China.
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Marques CR, Wibowo D, Rubio-Reyes P, Serafim LS, Soares AMVM, Rehm BHA. Bacterially assembled biopolyester nanobeads for removing cadmium from water. WATER RESEARCH 2020; 186:116357. [PMID: 32916618 DOI: 10.1016/j.watres.2020.116357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/24/2020] [Accepted: 08/29/2020] [Indexed: 06/11/2023]
Abstract
Cadmium (Cd)-contaminated waterbodies are a worldwide concern for the environment, impacting human health. To address the need for efficient, sustainable and cost-effective remediation measures, we developed innovative Cd bioremediation agents by engineering Escherichia coli to assemble poly(3-hydroxybutyric acid) (PHB) beads densely coated with Cd-binding peptides. This was accomplished by translational fusion of Cd-binding peptides to the N- or C-terminus of a PHB synthase that catalyzes PHB synthesis and mediates assembly of Cd2 or Cd1 coated PHB beads, respectively. Cd1 beads showed greater Cd adsorption with 441 nmol Cd mg-1 bead mass when compared to Cd2 beads (334 nmol Cd mg-1 bead-mass) and plain beads (238 nmol Cd mg-1 bead-mass). The Cd beads were not ecotoxic and did attenuate Cd-spiked solutions toxicity. Overall, the bioengineered beads provide a means to remediate Cd-contaminated sites, can be cost-effectively produced at large scale, and offer a biodegradable and safe alternative to synthetic ecotoxic treatments.
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Affiliation(s)
- Catarina R Marques
- CESAM - Centre of Marine and Environmental Studies, Department of Biology, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, Portugal.
| | - David Wibowo
- Centre for Cell Factories and Biopolymers, Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD 4111, Australia
| | - Patricia Rubio-Reyes
- Malaghan Institute of Medical Research, Gate 7, Victoria University Central Services Building, Kelburn, Wellington 6012, New Zealand
| | - Luísa S Serafim
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Amadeu M V M Soares
- CESAM - Centre of Marine and Environmental Studies, Department of Biology, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, Portugal
| | - Bernd H A Rehm
- Centre for Cell Factories and Biopolymers, Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD 4111, Australia
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Peng H, Guan T, Luo J, Yang K, Wu Y, Xu L, He W, Liang Y, Liu W. Pretreatment with Ochrobactrum immobilizes chromium and copper during sludge pyrolysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 199:110755. [PMID: 32446099 DOI: 10.1016/j.ecoenv.2020.110755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 04/29/2020] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
To increase the degree of immobilization of heavy metals subjected to sludge pyrolysis, we investigated the effects of pretreating sludge with Ochrobactrum supplementation on the immobilization of chromium (Cr) and copper (Cu) during sludge pyrolysis. The sequential extraction procedure was used to test the metallic forms of Cr and Cu. The immobilization of Cr and Cu was characterized with X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, etc. Results show that: 1) the addition of Ochrobactrum (1-8%) can accelerate the mineralization process in blank sludge and can accelerate the conversion of the oxidizable forms of Cr and Cu into the residual forms subjected to pyrolysis; 2) pretreatment with Ochrobactrum supplementation can inhibit the volatilization of Cr and Cu during sludge pyrolysis, particularly in the case of a high concentration of Cu. Notably, the pretreatment with Ochrobactrum can reduce 20.38-85.09% of the potential ecological risk of Cr and Cu. The pretreatment with Ochrobactrum contributes to the immobilization of Cr and Cu subjected to sludge pyrolysis and thus can prevent pollution of the environment. The results of this study can be used for harmless disposal of municipal sludge.
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Affiliation(s)
- Huanlong Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Tong Guan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Jingsi Luo
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Kaijie Yang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Yukun Wu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Liang Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Wei He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Yongmei Liang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China.
| | - Wei Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China.
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Peng H, Wu Y, Guan T, He W, Xu L, Liang Y, Liu W. Sludge aging stabilizes heavy metals subjected to pyrolysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 189:109984. [PMID: 31767461 DOI: 10.1016/j.ecoenv.2019.109984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 06/10/2023]
Abstract
In this study, we analyzed the effects of sludge aging pre-treatment on the stabilization mechanisms of heavy metals during sludge pyrolysis. First, the form of copper (Cu) and chromium (Cr) was conducted using the sequential extraction procedure proposed by the European Community Bureau of Reference (BCR). The stabilization mechanisms for the sludge pyrolysis of Cu and Cr were then analyzed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Results indicate the following: 1) with aging pre-treatment, the improvement in adsorption performance and the formation of newly crystallized materials, like polyhydroxy copper phosphate and chromium phosphate minerals, occur concurrently with the stabilization of heavy metals during pyrolysis; 2) after four weeks of aging, active functional groups like amino and carboxyl groups were significantly sharpened, and caused sustained complexation of the heavy metals. Results suggested that the aging pre-treatment aided the stabilization of heavy metals during sludge pyrolysis. Notably, the aging effect can decrease the potential ecological risk of heavy metals.
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Affiliation(s)
- Huanlong Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Yukun Wu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Tong Guan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Wei He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Liang Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Yongmei Liang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China.
| | - Wei Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China.
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11
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Peng H, Li D, Ye J, Xu H, Xie W, Zhang Y, Wu M, Xu L, Liang Y, Liu W. Biosorption behavior of the Ochrobactrum MT180101 on ionic copper and chelate copper. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 235:224-230. [PMID: 30682675 DOI: 10.1016/j.jenvman.2019.01.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 01/08/2019] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
To study the biosorption behaviors of bacteria on heavy metal chelators, the biosorption kinetics, biosorption thermodynamics and pH influence tests of the Ochrobactrum MT180101 on ionic and chelate copper were investigated. Furthermore, the biosorption mechanisms of the Ochrobactrum MT180101 on ionic copper and chelate copper were explained by means of an excitation emission matrix as well as infrared and X-ray photoelectron spectroscopy. The results indicated the following. 1) The biosorption on chelate copper was needed to destroy the complexation group first through metabolic and secretory activities. 2) The biosorption mechanism of the Ochrobactrum MT180101 on copper involved surface biosorption, extracellular chelation and bienzyme-mediated biotransformation. The results suggested that Ochrobactrum had a superior biosorption efficiency to ionic and chelate copper.
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Affiliation(s)
- Huanlong Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Da Li
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Jian Ye
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Haixing Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Wenjia Xie
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Yuguang Zhang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Foshan Water Group Co., Ltd., Foshan, 528000, PR China
| | - Meirou Wu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Liang Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China
| | - Yongmei Liang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China.
| | - Wei Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, PR China.
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12
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Jiang L, Chen X, Qin M, Cheng S, Wang Y, Zhou W. On-board saline black water treatment by bioaugmentation original marine bacteria with Pseudoalteromonas sp. SCSE709-6 and the associated microbial community. BIORESOURCE TECHNOLOGY 2019; 273:496-505. [PMID: 30469140 DOI: 10.1016/j.biortech.2018.11.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/06/2018] [Accepted: 11/11/2018] [Indexed: 06/09/2023]
Abstract
To reduce fresh water load on ships, seawater can be used for toilet flushing on-board. And saline black water was treated on-site by bioaugmentation original marine bacteria with Pseudoalteromonas sp. SCSE709-6 (P. sp. SCSE709-6) to prevent marine pollution. In the batch experiments, P. sp. SCSE709-6 was effective in nutrient removal, which was not closely related to the amount of inoculation. In the on-board continuous experiments, the systems inoculated with P. sp. SCSE709-6 possessed excellent TP removal ability (removal rate: 80.93% for T3 and 88.39% for T4). The inoculum of P. sp. SCSE709-6 changed the microbial community structure and increased the similarity of microbial communities. P. sp. SCSE709-6 had a significant influence on the performance and microbial community of the systems. This study strongly proposes that the P. sp. SCSE709-6 is a promising alternative in saline black water treatment, which has great significance to the practice of on-board seawater flushing toilet.
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Affiliation(s)
- Li Jiang
- School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Xi Chen
- 27 King's College Circle, Ontario, Toronto M5S 1A1, Canada
| | - Min Qin
- School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Shuhua Cheng
- School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Yunxiao Wang
- School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Weizhi Zhou
- School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
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13
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Teng Z, Shao W, Zhang K, Huo Y, Li M. Characterization of phosphate solubilizing bacteria isolated from heavy metal contaminated soils and their potential for lead immobilization. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 231:189-197. [PMID: 30342331 DOI: 10.1016/j.jenvman.2018.10.012] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/29/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
Phosphate solubilizing bacteria (PSB) were isolated from heavy metal contaminated soils and their potentials for lead (Pb) immobilization in soil were studied in this paper. 53 PSB strains were isolated and their minimum inhibitory concentrations (MICs) for lead were determined. The results showed that strains B3, B4, B10, F2-1 and L1-5 had relatively high lead resistant capabilities with MICs ranged from 0.5 to 8 mM, and were identified as species of Leclercia adecarboxylata and Pseudomonas putida by 16S rRNA. The most efficient PSB strains could solubilize 200 mg L-1 of P, and phosphate solubilizing capacity of those PSBs was related to the concentrations of organic acids, acid phosphatase activity and pH. Furthermore, the growth pattern of L1-5 strain with the presence of Pb(NO3)2 was observed and a mechanism of biomineralization of lead ions in bacteria biomass was determined by FT-IR and XRD analyses. Results showed that high concentration of lead can inhibit the growth of PSBs, and L1-5 isolate can transform lead ions into lead hydroxyapatite and pyromorphite. The PSBs, which possessing the properties of immobilizing lead through phosphate solubilization and biomineralization could be exploited for bioremediation of Pb polluted soils in future.
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Affiliation(s)
- Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Wen Shao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Keyao Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Yaoqiang Huo
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China.
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14
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Peng H, Xie W, Li D, Wu M, Zhang Y, Xu H, Ye J, Ye T, Xu L, Liang Y, Liu W. Copper-resistant mechanism of Ochrobactrum MT180101 and its application in membrane bioreactor for treating electroplating wastewater. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 168:17-26. [PMID: 30384163 DOI: 10.1016/j.ecoenv.2018.10.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 10/15/2018] [Accepted: 10/17/2018] [Indexed: 06/08/2023]
Abstract
It is necessary to study the mechanism of resistance to heavy metals in microbiological processes. In this study, Ochrobactrum MT180101 was used as the microbial source of an membrane bioreactor to investigate its degradation efficiency for electroplating wastewater and the copper-resistant mechanism. Meanwhile, excitation emission matrix-parallel factor, scanning electron microscope, atomic force microscope, fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and proteome analyses were applied to explain the comprehensive mechanism of the Ochrobactrum MT180101 resisting heavy metal toxicity. The results indicated that the Ochrobactrum MT180101 resisted heavy metal toxicity with the following pathways: i) binding metal cations on cell wall surfaces, ii) generating microbial products such as protein to chelate and stabilize the metal cations, iii) bio-transporting heavy metals from the intramembrane to the outer membrane by means of intracellular transport, and iv) reducing heavy metals through enzyme-mediated biotransformation. The results ensure that Ochrobactrum MT180101 was a copper-resistant bacterium that can be used in the pretreatment or deep treatment of electroplating wastewater.
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Affiliation(s)
- Huanlong Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Wenjia Xie
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Da Li
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Meirou Wu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Yuguang Zhang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Foshan Water Group Co., Ltd., Foshan 528000, PR China
| | - Haixing Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Jian Ye
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Tingjin Ye
- Foshan Water Group Co., Ltd., Foshan 528000, PR China
| | - Liang Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China
| | - Yongmei Liang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China.
| | - Wei Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, PR China.
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15
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Zhang X, Chen Z, Ma Y, Zhao J, Chen T, Fu H, Zhai H. Acute and persistent toxicity of Cd(II) to the microbial community of Anammox process. BIORESOURCE TECHNOLOGY 2018; 261:453-457. [PMID: 29685486 DOI: 10.1016/j.biortech.2018.04.055] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 04/09/2018] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
In this study, the short- and long-term effects of Cd(II) on the bioactivity, nitrogen removal and microbial community of the anaerobic ammonia oxidation (Anammox) process were investigated by step-wise increasing Cd(II). The self-recovery ability of Anammox was also studied after long-term exposure in Cd(II). The bioactivity of anaerobic ammonia-oxidizing bacteria (AAOB) within short-term exposure of Cd(II) were detected by batch experiments. Results showed that Cd(II) had both acute and persistent toxicity to Anammox, the IC50 in short-term exposure was calculated as 5.43 mg L-1. Long-term exposure led to the microbial diversity increase, as well as the relative abundance decrease of AAOB in Anammox system. AAOB was continuously suppressed by Cd(II) in 1-20 mg L-1, while it had self-adaption to Cd(II) in 1-10 mg L-1. Anammox biofilm showed prominent adsorbing ability for cadmium, and the cadmium in biofilm was the key factor affecting Anammox.
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Affiliation(s)
- Xiaojing Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
| | - Zhao Chen
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Yongpeng Ma
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Jianguo Zhao
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Tao Chen
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Haoqiang Fu
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Hanfei Zhai
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
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16
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Wang T, Yao J, Yuan Z, Zhao Y, Wang F, Chen H. Isolation of lead-resistant Arthrobactor strain GQ-9 and its biosorption mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:3527-3538. [PMID: 29159439 DOI: 10.1007/s11356-017-0694-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
In this study, lead-resistant bacterium Arthrobacter sp. GQ-9 with a resistant capability to cadmium, zinc, and copper was isolated from a heavy metal polluted soil. Microcalorimetry analysis was applied to assess the strain's microbial activity under Pb(II) stress and suggested that GQ-9's microbial activities under Pb(II) stress were stronger than a non-resistant strain. Biosorption batch experiments revealed that the optimal condition for adsorption of Pb(II) by GQ-9 was pH 5.5, a biomass dosage of 1.2 g L-1, and an initial Pb(II) concentration of 100 mg L-1 with a maximum biosorption capacity of 17.56 mg g-1.Adsorption-desorption experiments and Fourier transform infrared spectroscopy (FTIR) analysis were applied to elucidate the biosorption mechanisms. Adsorption-desorption analysis showed that GQ-9 cells could sequester 56.60% of the adsorbed Pb(II) ions on the cell wall. FTIR analysis suggested that hydroxyl, carboxyl, amino, nitrile, and sulfhydryl groups and amide I, amide II bands on the GQ-9 cell wall participated in the complexation of Pb(II) ions. The present study illustrates that the lead-resistant bacteria GQ-9 has the potential for further development of an effective and ecofriendly adsorbent for heavy metal bioremediation.
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Affiliation(s)
- Tianqi Wang
- School of Energy and Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Jun Yao
- School of Water Resource and Environment, Sino-Hungarian Joint Laboratory of Environmental Science and Health, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian District, Beijing, 100083, China.
| | - Zhimin Yuan
- School of Energy and Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Yue Zhao
- School of Energy and Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Fei Wang
- School of Energy and Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Huilun Chen
- School of Energy and Environmental Engineering, and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China.
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17
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Li X, Li D, Yan Z, Ao Y. Adsorption of cadmium by live and dead biomass of plant growth-promoting rhizobacteria. RSC Adv 2018; 8:33523-33533. [PMID: 35548138 PMCID: PMC9086479 DOI: 10.1039/c8ra06758a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 09/15/2018] [Indexed: 11/28/2022] Open
Abstract
Plant growth-promoting rhizobacteria (PGPR) have been extensively investigated in combination remediation with plants in heavy metal contaminated soil. However, being biosorbent, few studies of live and dead cells of PGPR have been undertaken. Meanwhile, the application of live or dead biomass for the removal of heavy metals continues to be debated. Therefore, this study uses living and non-living biosorbents of Cupriavidus necator GX_5, Sphingomonas sp. GX_15, and Curtobacterium sp. GX_31 to compare their Cd(ii) adsorption capacities by SEM-EDX, FTIR, and adsorption experiments. In the present study, whether the cells were living or dead and whatever the initial Cd(ii) concentration was, removal efficiency and adsorption capacity can be arranged as GX_31 > GX_15 > GX_5 (p < 0.05). However, removal efficiency in live and dead biosorbents was quite different and it greatly affected by the initial Cd(ii) concentrations. The dead cells exhibited a higher adsorption capacity than the live cells of GX_31. Nevertheless, for GX_5 and GX_15, the loading capacity of the non-living biomass was stronger than that of the living biomass at 20 mg L−1 of Cd(ii), but the capacity was similar at 100 mg L−1 of Cd(ii). Minor changes of spectra were found after autoclaving and it seemed that more functional groups of the dead biosorbent were involved in Cd(ii) binding by FTIR analysis, which also illustrated that the hydroxyl, amino, amide, and carboxyl groups played an important role in complexation with Cd(ii). Based on these findings, we concluded that the dead cells were more potent for Cd(ii) remediation, especially for GX_31. Plant growth-promoting rhizobacteria (PGPR) have been extensively investigated in combination remediation with plants in heavy metal contaminated soil.![]()
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Affiliation(s)
- Xingjie Li
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Dongbo Li
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Zhenning Yan
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Yansong Ao
- School of Agriculture and Biology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
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18
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Biosorption isotherm study of Cd 2+ , Pb 2+ and Zn 2+ biosorption onto marine bacterium Pseudoalteromonas sp. SCSE709-6 in multiple systems. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.117] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Compartmentalization of Co and Mn in live cells of Escherichia coli: investigation using 60Co and 54Mn as radioindicators. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5480-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Yuan Z, Yi H, Wang T, Zhang Y, Zhu X, Yao J. Application of phosphate solubilizing bacteria in immobilization of Pb and Cd in soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:21877-21884. [PMID: 28779341 DOI: 10.1007/s11356-017-9832-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 07/24/2017] [Indexed: 06/07/2023]
Abstract
In the present study, heavy metal (HM)-tolerant phosphate solubilizing bacteria (PSB) were isolated and their performance during the remediation of Pb and Cd in contaminated soil was studied. A total of 16 bacterial strains and one consortium were isolated, and the consortium had the highest phosphate solubilizing ability and HM tolerance. Great variations between the Fourier transform infrared (FTIR) spectra of consortium cells before and after adsorption of Pb2+ and Cd2+ revealed that amide I/amide II bonds and carboxyl on the cell surface were involved in binding of metal ions. High-throughput sequencing technique revealed that the consortium was composed of Enterobacter spp., Bacillus spp., and Lactococcus spp. The consortium was added into contaminated soil, and its potential ability in dissolution of phosphate from Ca3(PO4)2 and subsequent immobilization of HMs was tested. Results showed that when Ca3(PO4)2 was applied at 10.60 mg/g soil, PSB addition significantly increased soil available phosphate content from 12.28 to 17.30 mg/kg, thereby enhancing the immobilization rate of Pb and Cd from 69.95 to 80.76% and from 28.38 to 30.81%, respectively. Microcalorimetric analysis revealed that PSB addition significantly improved soil microbial activity, which was possibly related with the decreased HMs availability and the nutrient effect of the solubilized phosphate. The present study can provide a cost-effective and environmental-friendly strategy to remediate multiple HM-contaminated soils.
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Affiliation(s)
- Zhimin Yuan
- School of Energy & Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China
| | - Honghong Yi
- School of Energy & Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China.
| | - Tianqi Wang
- School of Energy & Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China
| | - Yiyue Zhang
- School of Energy & Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China
| | - Xiaozhe Zhu
- School of Energy & Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China
| | - Jun Yao
- School of Energy & Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China.
- School of Water Resource and Environmental Engineering, Sino-Hungarian Joint Laboratory of Environmental Science and Health, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China.
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21
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Özdemir S, Kilinç E, Okumuş V, Poli A, Nicolaus B, Romano I. Thermophilic Geobacillus galactosidasius sp. nov. loaded γ-Fe2O3 magnetic nanoparticle for the preconcentrations of Pb and Cd. BIORESOURCE TECHNOLOGY 2016; 201:269-275. [PMID: 26679049 DOI: 10.1016/j.biortech.2015.11.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 11/17/2015] [Accepted: 11/18/2015] [Indexed: 06/05/2023]
Abstract
Thermophilic bacteria, Geobacillus galactosidasius sp nov. was loaded on γ-Fe2O3 magnetic nanoparticle for the preconcentrations of Pb and Cd by solid phase extraction before ICP-OES. pH and flow rate of the solution, amounts of biosorbent and magnetic nanoparticle, volume of sample solution, effects of the possible interferic ions were investigated in details. Linear calibration curves were constructed in the concentration ranges of 1.0-60ngmL(-1) for Pb and Cd. The RSDs of the method were lower than 2.8% for Pb and 3.8% for Cd. Certified and standard reference samples of fortified water, wastewater, poplar leaves, and simulated fresh water were used to accurate the method. LOD values were found as 0.07 and 0.06ngmL(-1) respectively for Pb and Cd. The biosorption capacities were found as 34.3mgg(-1) for Pb and 37.1mgg(-1) for Cd. Pb and Cd concentrations in foods were determined. Surface microstructure was investigated by SEM-EDX.
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Affiliation(s)
- Sadin Özdemir
- Department of Biology, Faculty of Art and Science, Siirt University, 56100 Siirt, Turkey.
| | - Ersin Kilinç
- Health Services Vocational High School, Medical Marketing and Promotion Programme, Mardin Artuklu University, 47200 Mardin, Turkey
| | - Veysi Okumuş
- Department of Biology, Faculty of Art and Science, Siirt University, 56100 Siirt, Turkey
| | - Annarita Poli
- National Research Council of Italy (C.N.R.), Institute of Biomolecular Chemistry, Via Campi Flegrei, n. 34, 80078 Pozzuoli, Napoli, Italy
| | - Barbara Nicolaus
- National Research Council of Italy (C.N.R.), Institute of Biomolecular Chemistry, Via Campi Flegrei, n. 34, 80078 Pozzuoli, Napoli, Italy
| | - Ida Romano
- National Research Council of Italy (C.N.R.), Institute of Biomolecular Chemistry, Via Campi Flegrei, n. 34, 80078 Pozzuoli, Napoli, Italy
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