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Zhang H, Wang L, Xie Y, Zhang S, Ning P, Wang X. Silica-supported ionic liquid for efficient gaseous arsenic oxide removal through hydrogen bonding. J Hazard Mater 2024; 472:134482. [PMID: 38704905 DOI: 10.1016/j.jhazmat.2024.134482] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/08/2024] [Accepted: 04/28/2024] [Indexed: 05/07/2024]
Abstract
The emission of highly-toxic gaseous As2O3 (As2O3 (g)) from nonferrous metal smelting poses environmental concerns. In this study, we prepared an adsorbent (SMIL-X) by loading an ionic liquid (IL) ([HOEtMI]NTf2) into MCM-41 through an impregnation-evaporation process and then applied it to adsorb As2O3 (g). SMIL-20% exhibited an As2O3 (g) adsorption capacity of 35.48 mg/g at 400 °C, which was 490% times higher than that of neat MCM-41. Characterization of SMIL-X indicated that the IL was mainly supported on MCM-41 through O-H…O bonds formed between the hydroxyl groups (-OH) and the silanol groups (Si-OH) and the O-H…F bonds formed between the C-F groups and the Si-OH groups. The hydrogen bonds significantly contributed to the adsorption of As2O3 (g), with -NH and -OH groups forming hydrogen bonds with As-O species (i.e., N-H…O and O-H…O). This showed superior performance to traditional adsorbents that rely on van der Waals forces and chemisorption. Moreover, after exposure to high concentrations of SO2, the adsorption capacities remained at 76% of their initial values, demonstrating some sulfur resistance. This study presents an excellent adsorbent for the purification of As2O3 (g) and shows promising application potential for treating flue gas emitted by nonferrous metal smelting processes.
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Affiliation(s)
- Hui Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Hubei Key Laboratory of Industrial Fume and Dust Pollution Control, Jianghan University, Wuhan 430056, China
| | - Langlang Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Yibing Xie
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Shici Zhang
- Hubei Key Laboratory of Industrial Fume and Dust Pollution Control, Jianghan University, Wuhan 430056, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Xueqian Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
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2
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Wang W, Root CW, Peel HF, Garza M, Gidley N, Romero-Mariscal G, Morales-Paredes L, Arenazas-Rodríguez A, Ticona-Quea J, Vanneste J, Vanzin GF, Sharp JO. Photosynthetic pretreatment increases membrane-based rejection of boron and arsenic. Water Res 2024; 252:121200. [PMID: 38309061 DOI: 10.1016/j.watres.2024.121200] [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: 09/29/2023] [Revised: 01/10/2024] [Accepted: 01/23/2024] [Indexed: 02/05/2024]
Abstract
The metalloids boron and arsenic are ubiquitous and difficult to remove during water treatment. As chemical pretreatment using strong base and oxidants can increase their rejection during membrane-based nanofiltration (NF), we examined a nature-based pretreatment approach using benthic photosynthetic processes inherent in a unique type of constructed wetland to assess whether analogous gains can be achieved without the need for exogenous chemical dosing. During peak photosynthesis, the pH of the overlying clear water column above a photosynthetic microbial mat (biomat) that naturally colonizes shallow, open water constructed wetlands climbs from circumneutral to approximately 10. This biological increase in pH was reproduced in a laboratory bioreactor and resulted in analogous increases in NF rejection of boron and arsenic that is comparable to chemical dosing. Rejection across the studied pH range was captured using a monoprotic speciation model. In addition to this mechanism, the biomat accelerated the oxidation of introduced arsenite through a combination of abiotic and biotic reactions. This resulted in increases in introduced arsenite rejection that eclipsed those achieved solely by pH. Capital, operation, and maintenance costs were used to benchmark the integration of this constructed wetland against chemical dosing for water pretreatment, manifesting long-term (sub-decadal) economic benefits for the wetland-based strategy in addition to social and environmental benefits. These results suggest that the integration of nature-based pretreatment approaches can increase the sustainability of membrane-based and potentially other engineered treatment approaches for challenging water contaminants.
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Affiliation(s)
- Weishi Wang
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA; Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru
| | - Colin Wilson Root
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA; Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru
| | - Henry F Peel
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA
| | - Maximilian Garza
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA
| | - Nicholas Gidley
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA
| | - Giuliana Romero-Mariscal
- Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru; Facultad de Ingeniería de Procesos, Universidad Nacional de San Agustín de Arequipa. Santa Catalina 117, Arequipa 04001, Peru
| | - Lino Morales-Paredes
- Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru; Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín de Arequipa. Santa Catalina 117, Arequipa 04001, Peru
| | - Armando Arenazas-Rodríguez
- Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru; Facultad de Ciencias Biológicas, Universidad Nacional de San Agustín de Arequipa. Santa Catalina 117, Arequipa 04001, Peru
| | - Juana Ticona-Quea
- Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru; Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín de Arequipa. Santa Catalina 117, Arequipa 04001, Peru
| | - Johan Vanneste
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA; Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru
| | - Gary F Vanzin
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA; Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru
| | - Jonathan O Sharp
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA; Center for Mining Sustainability (Centro para Minería Sostenible), Colorado School of Mines and Universidad Nacional de San Agustín de Arequipa, Santa Catalina 117, Arequipa 04001, Peru; Hydrologic Science and Engineering Program, Colorado School of Mines, Golden, CO 80401, USA.
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3
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Yan X, Li Q, Huang X, Li K, Li B, Li S, Zhao Y, Wang Q, Liu H. Capture gaseous arsenic in flue gas by amorphous iron manganese oxides with high SO 2 resistance. Environ Res 2023; 236:116750. [PMID: 37500039 DOI: 10.1016/j.envres.2023.116750] [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: 05/19/2023] [Revised: 07/02/2023] [Accepted: 07/25/2023] [Indexed: 07/29/2023]
Abstract
In non-ferrous metal smelting, the problem of gaseous arsenic in high-sulfur flue gas is difficult to solve. Now we have developed oxygen-enriched amorphous iron manganese oxide (AFMBO) based on the unique superiority of iron-manganese oxide for arsenic capture to realize the effective control of gaseous arsenic in the non-ferrous smelting flue gas. The experimental results show that the arsenic adsorption capacity of AFMBO is up to 102.7 mg/g, which has surpassed most of the current adsorbents. In particular, AFMBO can effectively capture gaseous arsenic even at 12% v/v SO2 concentrations (88.45 mg/g). Moreover, the spent AFMBO possesses pronounced magnetic characteristics that make it easier to separate from dust, which is conducive to reducing the secondary environmental risk of arsenic. In terms of mechanism study, various characterization methods are used to explain the important role of lattice oxygen and adsorbed oxygen in the capture process of gaseous arsenic. Moreover, the reason for the efficient arsenic removal performance of AFMBO is also reasonably explained at the microscopic level. This study provides ideas and implications for gaseous arsenic pollution control research.
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Affiliation(s)
- Xuelei Yan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Qingzhu Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, 410083, China.
| | - Xiaowei Huang
- National Engineering Research Center for Rare Earth Materials, General Research Institute for Non-Ferrous Metals, Beijing, 100088, PR China
| | - Kaizhong Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Bensheng Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Shengtu Li
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Yeqiu Zhao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Qingwei Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; National Engineering Research Centre for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, 410083, China
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4
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Li G, Liu Y, Huang W, Chen L, Héroux P, Liu Y. Simultaneous remediation of arsenic and organic chemicals contaminated soil and groundwater using chemical oxidation and precipitation/stabilization: a case study. Environ Sci Pollut Res Int 2023; 30:86478-86483. [PMID: 37432574 DOI: 10.1007/s11356-023-28604-8] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 07/01/2023] [Indexed: 07/12/2023]
Abstract
After the departure of industrial facilities, reuse of the land in developed cities in China is problematic, due to the land contamination issues. The rapid remediation of sites with complex contamination is crucial and urgently needed. Herein, the case of on-site remediation of arsenic (As) in soil, as well as benzo(a)pyrene, total petroleum hydrocarbons, and As in groundwater was reported. For contaminated soil, the oxidant and deactivator (consisting of 20% sodium persulfate, 40% ferrous sulfate (FeSO4), and 40% portland cement) were applied to oxidize and immobilize As. As a result, the total amount and lixivium concentration of As were constrained under 20 mg/kg and 0.01 mg/L, respectively. Meanwhile, for contaminated groundwater, As and organic contaminants were treated by FeSO4/ozone and FeSO4/hydrogen peroxide with mass ratios of 1:5 and 1:8, respectively. The continuous monitoring of contaminants in 22 monitoring wells shown that all contaminants in groundwater were treated to meet the standards. In addition, the risk of secondary pollution and operation cost was effectively reduced by proper disposal and resourceful utilization. The findings indicated that the method of oxidation and precipitation/stabilization is technically, environmentally, and economically feasible for the remediation of contaminated sites with similar complex pollutants.
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Affiliation(s)
- Guoqing Li
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
- Shanghai institute of pollution control and ecological security, Shanghai, 200092, China
| | - Yanbiao Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
- Shanghai institute of pollution control and ecological security, Shanghai, 200092, China
| | - Wei Huang
- Shanghai Energy Conservation of Environment Co., Ltd., Taolin Road No. 18, Shanghai, 200135, China
| | - Luhai Chen
- Shanghai Jinxiang Environmental Technology Co., Ltd., Zhongjiang Road No. 388, Shanghai, 200062, China
| | - Paul Héroux
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, H3A 1A3, Canada
| | - Yanan Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China.
- Shanghai institute of pollution control and ecological security, Shanghai, 200092, China.
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5
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Zhang M, Liu L, Li A, Zhang T, Qiu G. UV-induced highly efficient removal of As(III) through synergistic photo-oxidation in the presence of Fe(II). Environ Sci Pollut Res Int 2022; 29:71583-71592. [PMID: 35604606 DOI: 10.1007/s11356-022-20931-6] [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: 01/21/2022] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
In polluted waters, arsenic (As) poses substantial risks to the environment and human health. Inorganic As mainly exists as As(V) and As(III), and As(III) usually shows higher mobility and toxicity and is more difficult to be removed by coagulation. The oxidation of coexisting Fe(II) can accelerate As(III) oxidation and removal by promoting the generation of reactive intermediates and Fe(III) coagulant in the presence of dissolved oxygen. However, the removal efficiency of As from acidic wastewaters is far from satisfactory due to the low Fe(II) oxidation rate by dissolved oxygen. Herein, UV irradiation was applied to stimulate the synergistic oxidation of Fe(II)/As(III), and the effects of coexisting Fe(II) concentration and pH were also evaluated. The synergistic oxidation of Fe(II)/As(III) significantly enhanced the removal of As from acidic waters. Under UV irradiation, Fe(II) significantly promoted the generation of reactive oxygen species (ROS), thereby facilitating As(III) oxidation. In addition, the formation of ferric arsenate and amorphous ferric (hydr)oxides contributed much to As removal. In the As(III)-containing solution with 200 μmol L-1 Fe(II) at initial pH 4.0, the total arsenic (As(T)) concentration decreased from 67.0 to 1.3 and 0.5 μmol L-1, respectively, at 25 and 120 min under UV irradiation. The As(T) removal rate increased with increasing Fe(II) concentration, and first increased and then decreased with increasing initial pH from 2.0 to 6.0. This study clarifies the mechanism for the synergistic photo-oxidation of Fe(II)/As(III) under UV irradiation, and proposes a new strategy for highly efficient As(III) removal from acidic industrial and mining wastewaters.
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Affiliation(s)
- Mingzhe Zhang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Lihu Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Anyu Li
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Tengfei Zhang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China
| | - Guohong Qiu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, State Environmental Protection Key Laboratory of Soil Health and Green Remediation, College of Resources and Environment, Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.
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6
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Roy M, van Genuchten CM, Rietveld L, van Halem D. Groundwater-native Fe(II) oxidation prior to aeration with H 2O 2 to enhance As(III) removal. Water Res 2022; 223:119007. [PMID: 36044797 DOI: 10.1016/j.watres.2022.119007] [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: 06/16/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Groundwater contaminated with arsenic (As) must be treated prior to drinking, as human exposure to As at toxic levels can cause various diseases including cancer. Conventional aeration-filtration applied to anaerobic arsenite (As(III)) contaminated groundwater can remove As(III) by co-oxidizing native iron (Fe(II)) and As(III) with oxygen (O2). However, the As(III) removal efficiency of conventional aeration can be low, in part, because of incomplete As(III) oxidation to readily-sorbed arsenate (As(V)). In this work, we investigated a new approach to enhance As(III) co-removal with native Fe(II) by the anaerobic addition of hydrogen peroxide (H2O2) prior to aeration. Experiments were performed to co-oxidize Fe(II) and As(III) with H2O2 (anaerobically), O2 (aerobically), and by sequentially adding of H2O2 and O2. Aqueous As(III) and As(V) measurements after the reaction were coupled with solid-phase speciation by Fe and As K-edge X-ray absorption spectroscopy (XAS). We found that complete anaerobic oxidation of 100 µM Fe(II) with 100 µM H2O2 resulted in co-removal of 95% of 7 µM As(III) compared to 44% with 8.0-9.0 mg/L dissolved O2. Furthermore, we found that with 100 µM Fe(II), the initial Fe(II):H2O2 ratio was a critical parameter to remove 7 µM As(III) to below the 10 µg/L (0.13 µM) WHO guideline, where ratios of 1:4 (mol:mol) Fe(II):H2O2 led to As(III) removal matching that of 7 µM As(V). The improved As(III) removal with H2O2 was found to occur partly because of the well-established enhanced efficiency of As(III) oxidation in Fe(II)+H2O2 systems relatively to Fe(II)+O2 systems. However, the XAS results unambiguously demonstrated that a large factor in the improved As(III) removal was also due to a systematic decrease in crystallinity, and thus increase in specific surface area, of the generated Fe(III) (oxyhydr)oxides from lepidocrocite in the Fe(II)+O2 system to poorly-ordered Fe(III) precipitates in the Fe(II)+H2O2 system. The combined roles of H2O2 (enhanced As(III) oxidation and structural modification) can be easily overlooked when only aqueous species are measured, but this dual impact must be considered for accurate predictions of As removal in groundwater treatment.
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Affiliation(s)
- Mrinal Roy
- Water Management Department, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, Delft CN 2628, the Netherlands.
| | - Case M van Genuchten
- Department of Geochemistry, Geological Survey of Denmark and Greenland, Copenhagen DK 1350, Denmark
| | - Luuk Rietveld
- Water Management Department, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, Delft CN 2628, the Netherlands
| | - Doris van Halem
- Water Management Department, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, Delft CN 2628, the Netherlands
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7
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Zang S, Qiu H, Sun C, Zhou H, Cui L. High Efficiency Adsorption Removal of Arsenilic Acid and Arsenate(V) by Iron-Modified Corncob Biochar. Bull Environ Contam Toxicol 2022; 109:379-385. [PMID: 35622103 DOI: 10.1007/s00128-022-03536-0] [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: 12/13/2021] [Accepted: 04/20/2022] [Indexed: 06/15/2023]
Abstract
It is crucial that a highly effective adsorbent can be used to simultaneously remove the composite pollution including both inorganic and organic arsenic from wastewater. In this work, the iron modified corncob biochar (MCCB), prepared via the co-precipitation of ferric chloride hexahydrate (FeCl3⋅6H2O) with sodium hydroxide (NaOH) on corncob biochar, was studied for the high efficiency removal of arsenilic acid (ASA) and arsenate [As(V)] in wastewater. X-ray diffraction, scanning electron microscopy, and fourier transform infrared spectroscopy were carried out to characterize the MCCB. At pH of 4.0-5.0, initial concentration of 10 mg/L ASA and 1 mg/L As(V), adsorbent dose of 0.4 g/L, the maximum adsorption capacities of ASA and As(V) were 49.20 and 4.89 mg/g, respectively. The adsorption performance of MCCB for ASA and As(V) was fitted well to the pseudo-second-order kinetic model. Results from this study indicate the promise of MCCB as an efficient, low-cost and environmentally friendly adsorbent for composite arsenic pollution.
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Affiliation(s)
- Shuyan Zang
- Shenyang University of Chemical Technology, Shenyang, 110142, China
| | - Hongwei Qiu
- Shenyang University of Chemical Technology, Shenyang, 110142, China
| | | | - Huafeng Zhou
- Shenyang University of Chemical Technology, Shenyang, 110142, China
| | - Lizhi Cui
- Shenyang University of Chemical Technology, Shenyang, 110142, China
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8
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Maitlo HA, Lee J, Park JY, Kim JC, Kim KH, Kim JH. An energy-efficient air-breathing cathode electrocoagulation approach for the treatment of arsenite in aquatic systems. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.01.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Binh PT, Van Anh NT, Thuy MTT, Xuan MT. Kinetics and isotherm studies for adsorption of arsenic on ferric hydroxide by potentiostatic electrocoagulation. VJCH 2018. [DOI: 10.1002/vjch.201800080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Phan Thi Binh
- Institute of Chemistry; Vietnam Academy of Science and Technology; Viet Nam
| | - Nguyen Thi Van Anh
- Institute of Chemistry; Vietnam Academy of Science and Technology; Viet Nam
| | - Mai Thi Thanh Thuy
- Institute of Chemistry; Vietnam Academy of Science and Technology; Viet Nam
| | - Mai Thi Xuan
- Institute of Chemistry; Vietnam Academy of Science and Technology; Viet Nam
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10
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Affiliation(s)
- Phan Thi Binh
- Institute of Chemistry; Vietnam Academy of Science and Technology
| | | | | | - Mai Thi Xuan
- Institute of Chemistry; Vietnam Academy of Science and Technology
| | - Le Cao The
- Center for Monitoring of Hanoi Environmental Resources; Department of Hanoi Environmental Resources
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11
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Pan H, Hou H, Shi Y, Li H, Chen J, Wang L, Crittenden JC. High catalytic oxidation of As(III) by molecular oxygen over Fe-loaded silicon carbide with MW activation. Chemosphere 2018; 198:537-545. [PMID: 29428768 DOI: 10.1016/j.chemosphere.2018.01.116] [Citation(s) in RCA: 8] [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: 08/20/2017] [Revised: 01/08/2018] [Accepted: 01/23/2018] [Indexed: 06/08/2023]
Abstract
The catalytic oxidation of arsenite (As(III)) to arsenate (As(V)) and the removal of arsenic (As) in an iron loaded silicon carbide (Fe/SiC) system under microwave (MW) irradiation were studied. Fe/SiC was synthesized by electro-deposition and its capability of activating molecular oxygen was also characterized. Highly efficient As(III) removal in a wide pH range of 2.5-9.5 was achieved, involving oxidation by reactive oxidation species (OH and O2-) induced by MW irradiation and adsorption by the generated Fe (hrdro)oxide precipitates. Significant enhancement of As(III) oxidation was achieved at acidic pH, where sequential fresh Fe(0) exposure with MW irradiation could improve the Fenton-like reactions and oxidation efficiency for As(III). As(III) removal was accelerated via adsorption at alkaline conditions, where the adsorbed Fe(II) on Fe/SiC showed significant catalytic activity for molecular oxygen and high pH further favored the formation of (hydro)oxides and the As sequestration by adsorption. Fe/SiC showed superior performance for the treatment of As in water with MW irradiation.
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Affiliation(s)
- Hong Pan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China
| | - Huijie Hou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China
| | - Yao Shi
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China
| | - Hongbo Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China
| | - Jing Chen
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China.
| | - Linling Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China.
| | - John C Crittenden
- Brook Byers Institute for Sustainable Systems, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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12
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Molinari R, Argurio P. Arsenic removal from water by coupling photocatalysis and complexation-ultrafiltration processes: A preliminary study. Water Res 2017; 109:327-336. [PMID: 27918996 DOI: 10.1016/j.watres.2016.11.054] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 06/13/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 06/06/2023]
Abstract
Inorganic As removal from contaminated water has been studied by off-line coupling of photocatalysis and complexation-ultrafiltration (CP-UF), showing that this combination permits to obtain a quite complete arsenic removal from the treated water. Two commercial polymers, poly(dimethylamine-coepichlorohydrin-coethylenediamine) (PDEHED) and poly(diallyl dimethyl amnmonium chloride) (PolyDADMAC) have been tested in the CP-UF process. The operating conditions (pH and polymer/As weight ratio) for As(V) complexation were determined finding values of 7.5/20 and 9.2/30 for PDEHED and polyDADMAC, respectively. The UF tests were performed by continuous diafiltration and diafiltration with volume reduction modes. The latter method permits to save the volume of washing solution during polymer regeneration. As(III) was not complexed, operating under the As(V) complexation conditions, thus a pre-oxidation step by using the photocatalytic approach was carried out to remove As(III) species. As(III) conversion to As(V) was evaluated by As speciation by using the CP-UF process for analytical purposes. Photocatalytic oxidation was successfully performed under UV radiation by using TiO2 (0.05 mg L-1), O2 and pH = 9. The oxidation was very fast during the first 10 min following a zero order kinetics (k = 0.83 mg L-1 min-1) and reaching 90% As(III) oxidation. A conceptual scheme coupling photocatalysis and CP-UF and some criteria to operate the CP-UF process, useful to address it towards application, are reported.
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Affiliation(s)
- R Molinari
- Department of Environmental and Chemical Engineering, University of Calabria, Via P. Bucci, Cubo 45/A, I-87036, Arcavacata di Rende, CS, Italy.
| | - P Argurio
- Department of Environmental and Chemical Engineering, University of Calabria, Via P. Bucci, Cubo 45/A, I-87036, Arcavacata di Rende, CS, Italy
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Vidal J, Huiliñir C, Salazar R. Removal of organic matter contained in slaughterhouse wastewater using a combination of anaerobic digestion and solar photoelectro-Fenton processes. Electrochim Acta 2016; 210:163-70. [DOI: 10.1016/j.electacta.2016.05.064] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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