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Mao Q, Xie X, Pinzon-Nuñez DA, Xie Z, Liu T, Irshad S. Native microalgae and Bacillus XZM remediate arsenic-contaminated soil by forming biological soil crusts. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118858. [PMID: 37647731 DOI: 10.1016/j.jenvman.2023.118858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/09/2023] [Accepted: 08/20/2023] [Indexed: 09/01/2023]
Abstract
Biological soil crusts (BSCs) are a useful tool for immobilization of metal(loid)s in mining areas. Yet, the typical functional microorganisms involved in promoting the fast development of BSCs and their impacts on arsenic(As) contaminated soil remain unverified. In this study, As-contaminated soil was inoculated with indigenous Chlorella thermophila SM01 (C. thermophila SM01), Leptolyngbya sp. XZMQ, isolated from BSCs in high As-contaminated areas and plant growth-promoting (PGP) bacteria (Bacillus XZM) to construct BSCs in different manners. After 45 days of ex-situ culture experiment, Leptolyngbya sp. XZMQ and bacteria could form obvious BSCs. Compared to single-inoculated microalgae, the co-inoculation of Leptolyngbya sp. XZMQ and Bacillus XZM increased soil pH and water content by 10% and 26%, respectively, while decreasing soil EC and density by 19% and 14%, respectively. The soil catalase, alkaline phosphatase, sucrase, and urease activities were also increased by 30.53%, 96.24%, 154.19%, and 272.17%, respectively. The co-inoculation of Leptolyngbya sp. XZMQ and Bacillus XZM drove the formation of BSCs by producing large amounts of extracellular polymeric substances (EPS). The three-dimensional fluorescence spectroscopy (3D-EEM) analysis showed that induced BSCs increased As immobilization by enhancing the contents of tryptophan and tyrosine substances, fulvic acid, and humic acid in EPS. The presence of the -NH2 and -COOH functional groups in tryptophan residues were determined using Fourier Transform Infrared Spectroscopy (FTIR). X-Ray Diffraction (XRD) analysis showed that there were iron (hydrogen) oxides in BSCs, which could form ternary complexes with humic acid and As, thereby increasing the adsorption of As. Therefore, BSCs formed by co-inoculation of Leptolyngbya sp. XZMQ and Bacillus XZM increased the immobilization of As, thereby reducing the content of soluble As in the environment. In summary, our findings innovatively provided a new method for the remediation of As-contaminated soil in mining areas.
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Affiliation(s)
- Qing Mao
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Xi Xie
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | | | - Zuoming Xie
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China.
| | - Taikun Liu
- Linyi Vocational University of Science and Technology, Linyi, 276000, China
| | - Sana Irshad
- Institute for Advanced Study, Shenzhen University, Shenzhen, 51806, China
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2
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Guo S, Jiang M, Lin J, Khan NI, Owens G, Chen Z. Arsenic speciation, oxidation and immobilization in an unsaturated soil in the presence of green synthesized iron oxide nanoparticles and humic acid. CHEMOSPHERE 2023; 311:137198. [PMID: 36356806 DOI: 10.1016/j.chemosphere.2022.137198] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 10/18/2022] [Accepted: 11/06/2022] [Indexed: 06/16/2023]
Abstract
While the availability of arsenic (As) in soil is well known to be highly correlated with the presence of iron (Fe) oxides and humic acid (HA) in the soil, the relationship between Fe oxides and HA and As species in the soil is less well understood. In this study, As speciation in an unsaturated soil in the presence of external HA and green synthesized Fe oxide nanoparticles (FeNPs) showed that As(V) was mainly distributed to the specifically-bound (F2), amorphous and poorly-crystalline hydrous oxides of Fe, Al (F3) and the well-crystallized hydrous oxides of Fe and Al (F4). While As(III). This was the major component in unsaturated soil, and was mainly distributed to F4 and the residual fraction (F5). As bound to F3 and F5 was most sensitive to the addition of HA and FeNPs, while HA/FeNPs treatment increased the F3-bound As(V); however, it decreased the F5-bound As(III). Nonetheless the effect of HA on As is completely different to the HA/FeNPs treatment. The increase of As(V) in F3 resulted from F5-bound As(III) oxidation when treated by HA/FeNPs. Cyclic voltammetry confirmed that HA and Fe3+/Fe2+ redox enhanced As(III) oxidation, while FTIR revealed that HA-bound As(III) was the least available fraction in the soil. Finally, a mechanism involving a combination of HA and FeNPs was proposed for explaining the redistribution of As species in the soil.
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Affiliation(s)
- Shurui Guo
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China
| | - Mingqin Jiang
- Fujian Inspection and Research Institute for Product Quality, Fuzhou, 350002, Fujian Province, China
| | - Jiajiang Lin
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China.
| | - Nasreen Islam Khan
- Environmental Contaminants Group, Future Industries Institute, University of South Australian, Mawson Lakes, SA, 5095, Australia
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australian, Mawson Lakes, SA, 5095, Australia
| | - Zuliang Chen
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China.
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3
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Lv X, Li S, Yang Q, Zhang S, Su J, Cheng SB, Lai Y, Chen J, Zhan J. Robust, reliable and quantitative sensing of aqueous arsenic species by Surface-enhanced Raman Spectroscopy: The crucial role of surface silver ions for good analytical practice. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 281:121600. [PMID: 35816865 DOI: 10.1016/j.saa.2022.121600] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/25/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
Arsenic speciation analysis is important for pollution and health risk assessment. Surface-enhanced Raman Spectroscopy (SERS) is supposed to be a promising detection technology for arsenic species owing to the unique fingerprints. However, further application of SERS is hampered by its poor repeatability. Herein, the role of surface silver ions on colloidal Ag was revealed in SERS analysis of arsenic species. Arsenic species were adsorbed on Ag nanoparticles (Ag NPs) driven by surface silver ions and were simultaneously sensed by the SERS "hot spots" generated from the aggregation of Ag NPs. So, the inconsistent SERS activities of Ag NPs synthesized from different batches can be significantly improved by modifying external silver ions onto Ag NPs (AgNPs@Ag+), Specific binding affinity of surface silver ions to arsenic species generated higher sensitivity (detection limit, 4.0 × 10-11 mol L-1 for arsenite, 8.0 × 10-11 mol L-1 for arsenate), wider linear range, faster response, cleaner spectra background and better reproducibility. Batch-to-batch reproducibility was significantly improved with a variation below 3.1%. The method was also demonstrated with drinking and environmental water with adequate recovery and high interference resistance. Our findings displayed good analytical practice of the surface silver ions derived SERS method and its great potential in the rapid detection of hazardous materials.
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Affiliation(s)
- Xiaochen Lv
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Shu Li
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Qing Yang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Shaoying Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Jie Su
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Shi-Bo Cheng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yongchao Lai
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, China.
| | - Jing Chen
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Jinhua Zhan
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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4
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Ouyang X, Ma J, Li P, Chen Y, Weng L, Li Y. Comparison of the effects of large-grained and nano-sized biochar, ferrihydrite, and complexes thereof on Cd and As in a contaminated soil-plant system. CHEMOSPHERE 2021; 280:130731. [PMID: 33971411 DOI: 10.1016/j.chemosphere.2021.130731] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/20/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
Cd and As are difficult to co-remediate in co-contaminated soils. In this study, remediation materials comprising large-grained and nano-sized biochar (BC), ferrihydrite (FH), and complexes thereof were added to Cd- and As-contaminated soil. The uptake of Cd and As by pak choi (Brassica chinensis L.) was then evaluated using a pot experiment and the Cd and As concentrations of the soil pore water and leaching water were measured. The Cd and As concentrations of the pore and leaching water were slightly increased with the addition of BC, and decreased with addition of FH and the biochar-ferrihydrite complex (BC-FH). However, nano-sized BC (BCN), FH (FHN), and BC-FH (BC-FHN) had little influence on the decreases in Cd and As of the two monitored water types. Large-grained remediation materials, rather than nanomaterials, decreased the Cd and As concentrations of the two monitored water types. Nonetheless, nanomaterial treatments more effectively decreased the Cd and As concentrations in plants by an average of >10% relative to the large-grained treatments. The DLVO theory analysis suggested that BCN, FHN, and BC-FHN, immobilized in the topsoil, adsorbed heavy metals in the rhizosphere soil. The remainder of the nano-sized materials was dispersed in the rhizosphere soil pores, shielding the uptake of Cd and As by the roots. Although the doses of nanomaterials used in this study were less than one-fortieth of those of the large-grained materials, changes in the plant rhizosphere microenvironment caused by the nanomaterials decreased the risk of toxicity transfer from the soil to the plants.
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Affiliation(s)
- Xiaoxue Ouyang
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
| | - Jie Ma
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China.
| | - Pan Li
- School of Earth System Science, Tianjin University, Tianjin, 300072, China
| | - Yali Chen
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
| | - Liping Weng
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Department of Soil Quality, Wageningen University, Wageningen, the Netherlands.
| | - Yongtao Li
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 341000, China
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Rahman MM, Ara MG, Alim MA, Uddin MS, Najda A, Albadrani GM, Sayed AA, Mousa SA, Abdel-Daim MM. Mesoporous Carbon: A Versatile Material for Scientific Applications. Int J Mol Sci 2021; 22:ijms22094498. [PMID: 33925852 PMCID: PMC8123390 DOI: 10.3390/ijms22094498] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 01/16/2023] Open
Abstract
Mesoporous carbon is a promising material having multiple applications. It can act as a catalytic support and can be used in energy storage devices. Moreover, mesoporous carbon controls body’s oral drug delivery system and adsorb poisonous metal from water and various other molecules from an aqueous solution. The accuracy and improved activity of the carbon materials depend on some parameters. The recent breakthrough in the synthesis of mesoporous carbon, with high surface area, large pore-volume, and good thermostability, improves its activity manifold in performing functions. Considering the promising application of mesoporous carbon, it should be broadly illustrated in the literature. This review summarizes the potential application of mesoporous carbon in many scientific disciplines. Moreover, the outlook for further improvement of mesoporous carbon has been demonstrated in detail. Hopefully, it would act as a reference guidebook for researchers about the putative application of mesoporous carbon in multidimensional fields.
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Affiliation(s)
- Md. Motiar Rahman
- Shenzhen Institute of Advanced Technology (SIAT) of the Chinese Academy of Sciences (CAS), Shenzhen 518055, China
- Nanotechnology and Catalysis Research Center (NanoCat), University of Malaya, Kuala Lumpur 50603, Malaysia;
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
- Correspondence:
| | - Mst Gulshan Ara
- Nanotechnology and Catalysis Research Center (NanoCat), University of Malaya, Kuala Lumpur 50603, Malaysia;
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Mohammad Abdul Alim
- Department of Chemistry, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh;
- Graduate School of Innovative Life Science, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Md. Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka 1213, Bangladesh;
- Pharmakon Neuroscience Research Network, Dhaka 1207, Bangladesh
| | - Agnieszka Najda
- Laboratory of Quality of Vegetables and Medicinal Plants, Department of Vegetable Crops and Medicinal Plants, University of Life Sciences in Lublin, 15 Akademicka Street, 20-950 Lublin, Poland;
| | - Ghadeer M. Albadrani
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11474, Saudi Arabia;
| | - Amany A. Sayed
- Zoology Department, Faculty of Science, Cairo University, Giza 12613, Egypt;
| | - Shaker A. Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY 12144, USA;
| | - Mohamed M. Abdel-Daim
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt;
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6
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Zhang Y, Gan Y, Yu K, Han L. Fractionation of carbon isotopes of dissolved organic matter adsorbed to goethite in the presence of arsenic to study the origin of DOM in groundwater. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:1225-1238. [PMID: 32651930 DOI: 10.1007/s10653-020-00644-w] [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: 01/31/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
Natural dissolved organic matter (DOM) in groundwater plays a crucial role in mobilizing arsenic (As). The complex contribution of DOM sources makes it hard to predict how the variation of environmental conditions would affect the distribution of As concentrations. Identifying the carbon isotope fractionation of DOM is the key to quantify DOM sources based on stable carbon isotopes. To understand the magnitude and variability in the carbon isotopic fractionation of DOM in competitive adsorption with As(V), this study investigated the δ13C values of fulvic acid (FA) and DOM during adsorption to goethite in the presence of As(V), at a specific pH and temperature. The carbon isotopic enrichment factor (ε) of FA in the adsorption to goethite was 0.65 ± 2.11‰ at pH 4.1, 25 °C, suggesting that FA molecules containing 13C were more easily adsorbed to goethite. An increasing temperature increased εFA from 0.32 ± 1.17‰ to 0.82 ± 5.39‰ at 15-35 °C. For dissolved sediment organic matter (DSOM) cases, molecules containing 13C were more easily adsorbed to goethite. However, enrichment factors were not detected due to a reduction in DSOM adsorption and the diversity of natural humic substances or groups. The findings provide basic data for accurately ascertaining DOM sources through carbon isotopes, which is significant for predicting As fluctuation in aquifers affected by monsoon climate and/or human activities.
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Affiliation(s)
- Yanan Zhang
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, China
- State Key Laboratory of Biogeology and Environment Geology, China University of Geosciences, Wuhan, 430074, China
| | - Yiqun Gan
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, China.
- State Key Laboratory of Biogeology and Environment Geology, China University of Geosciences, Wuhan, 430074, China.
| | - Kai Yu
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, China
| | - Li Han
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, China
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7
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Huang X, Wang Z. Comment on "Arsenite biotransformation by Rhodococcus sp.: Characterization, optimization using response surface methodology and mechanistic studies", Science of the Total Environment, 687, 577-589(2019). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 721:135042. [PMID: 31787281 DOI: 10.1016/j.scitotenv.2019.135042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/15/2019] [Accepted: 10/16/2019] [Indexed: 06/10/2023]
Abstract
Kumari et al. investigated the arsenic resistance and arsenic biotransforming ability in three bacterial species, mainly Rhodococcus sp.. But in the use of response surface methodology to optimize key parameters that affect the removal of arsenic, the effects of dissolved oxygen and the effect of HA addition on the adsorption or oxidation of arsenic by bacteria were ignored. We therefore recommend taking the impacts of the above-mentioned factors on the removal of arsenic into examination.
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Affiliation(s)
- Xingyun Huang
- School of Resources and Environmental Science, Wuhan University, Wuhan 430079, PR China.
| | - Zhenhua Wang
- School of Resources and Environmental Science, Wuhan University, Wuhan 430079, PR China
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8
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Kumari N, Rana A, Jagadevan S. Response to the comments on the paper "Arsenite biotransformation by Rhodococcus sp.: Characterization, optimization using response surface methodology and mechanistic studies". THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 712:135748. [PMID: 31787303 DOI: 10.1016/j.scitotenv.2019.135748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 11/23/2019] [Indexed: 06/10/2023]
Affiliation(s)
- Nisha Kumari
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
| | - Anu Rana
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
| | - Sheeja Jagadevan
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India.
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9
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Kumari N, Rana A, Jagadevan S. Arsenite biotransformation by Rhodococcus sp.: Characterization, optimization using response surface methodology and mechanistic studies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 687:577-589. [PMID: 31216511 DOI: 10.1016/j.scitotenv.2019.06.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/11/2019] [Accepted: 06/05/2019] [Indexed: 06/09/2023]
Abstract
A large population of the world is under increased health risk due to consumption of arsenic contaminated groundwater. The present study investigates the arsenic resistance and arsenic biotransforming ability in three bacterial species, namely Bacillus arsenicus, Rhodococcus sp. and Alcaligenes faecalis for employing them in potential groundwater bioremediation programmes. The tolerance to pH levels for the 3 organisms are 6-9 for A. faecalis, 5-10 for Rhodococcus and 5-9 for B. arsenicus. The arsenic bio-oxidation capacity was qualitatively confirmed by using the silver nitrate method and all three bacteria were able to convert arsenite to arsenate. The arsenite tolerance capacity (MIC values) were found to be 3 mM, 7 mM and 12 mM for B. arsenicus, A. faecalis and Rhodococcus sp. respectively. The changes in cellular morphology of these strains under various arsenic stress conditions were studied using advanced cell imaging techniques such as scanning electron microscopy and Atomic Force Microscopy. Rhodococcus sp. emerged as a potential candidate for bioremediation application. A response surface methodology was employed to optimize key parameters affecting arsenic removal (pH, Iron (II) soluble, concentration of humic acid and initial arsenic concentration) and at optimized conditions, experimental runs demonstrated 48.34% removal of As (III) (initial concentration = 500 μg/L) in a duration of 6 h, with complete removal after 48 h. Evidences from this work indicate that arsenic removal occurs through bioaccumulation, biotransformation and biosorption. The present study makes the first attempt to investigate the arsenic removal capability of Rhodococcus sp. in synthetic groundwater by employing bacterial whole cell assays. This study also sheds light on the arsenic tolerance and detoxification mechanisms employed by these bacteria, knowledge of which could be crucial in the successful implementation of in-situ bioremediation programmes.
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Affiliation(s)
- Nisha Kumari
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
| | - Anu Rana
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
| | - Sheeja Jagadevan
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India.
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Ma J, Guo H, Weng L, Li Y, Lei M, Chen Y. Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH. CHEMOSPHERE 2018; 212:794-801. [PMID: 30189406 DOI: 10.1016/j.chemosphere.2018.08.131] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/23/2018] [Accepted: 08/26/2018] [Indexed: 05/20/2023]
Abstract
Both humic acid and arsenic (As) have a strong affinity to ferrihydrite colloids (FHC). However, little is known about effects of humic acid colloid (HAC) and FHC interaction on transport and deposition of As in porous media. Co-transport of HAC-FHC and As at different pH was systematically investigated by monitoring their breakthrough curves (BTCs) in saturated sand columns. Colloid and solute transport models were used to reveal mechanisms of As transport with HAC-FHC in porous media. Results showed that HAC-FHC regulated As transport. Under neutral pH conditions, As transport was facilitated by FHC loading small chain-shaped HAC, while it was slightly retarded by FHC loading granular HAC. Under alkaline conditions, HAC was chain-shaped and coupled with FHC to facilitate As transport. However, mobile colloid-adsorbed As was less evident due to relatively low adsorption on FHC under alkaline pH in comparison with the transport under neutral pH. The presence of HAC occupied adsorption sites on FHC and thus decreased As adsorption. Arsenic adsorption on mobile FHC decreased with increasing HAC concentration. Therefore, HAC had an antagonistic effect on mixed colloid-facilitated As transport at neutral and alkaline conditions. Arsenic was readily co-deposited with FHC, especially at low pH. This study suggested that morphology and concentration of HAC, mobility of FHC, and solution pH would control As transport in porous media. The fate of As changed from co-transport with HAC-FHC to co-deposition when environmental pH decreased.
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Affiliation(s)
- Jie Ma
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, PR China; MOE Key Laboratory of Groundwater Circulation & Environment Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Huaming Guo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, PR China; MOE Key Laboratory of Groundwater Circulation & Environment Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China.
| | - Liping Weng
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, PR China
| | - Yongtao Li
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China; Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, PR China
| | - Mei Lei
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Yali Chen
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, PR China
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Hu S, Lu Y, Peng L, Wang P, Zhu M, Dohnalkova AC, Chen H, Lin Z, Dang Z, Shi Z. Coupled Kinetics of Ferrihydrite Transformation and As(V) Sequestration under the Effect of Humic Acids: A Mechanistic and Quantitative Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:11632-11641. [PMID: 30230819 DOI: 10.1021/acs.est.8b03492] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In natural environments, kinetics of As(V) sequestration/release is usually coupled with dynamic Fe mineral transformation, which is further influenced by the presence of natural organic matter (NOM). Previous work mainly focused on the interactions between As(V) and Fe minerals. However, there is a lack of both mechanistic and quantitative understanding on the coupled kinetic processes in the As(V)-Fe mineral-NOM system. In this study, we investigated the effect of humic acids (HA) on the coupled kinetics of ferrihydrite transformation into hematite/goethite and sequestration of As(V) on Fe minerals. Time-resolved As(V) and HA interactions with Fe minerals during the kinetic processes were studied using aberration-corrected scanning transmission electron microscopy, chemical extractions, stirred-flow kinetic experiments, and X-ray absorption spectroscopy. Based on the experimental results, we developed a mechanistic kinetics model for As(V) fate during Fe mineral transformation. Our results demonstrated that the rates of As(V) speciation changes within Fe minerals were coupled with ferrihydrite transformation rates, and the overall reactions were slowed down by the presence of HA that sorbed on Fe minerals. Our kinetics model is able to account for variations of Fe mineral compositions, solution chemistry, and As(V) speciation, which has significant environmental implications for predicting As(V) behavior in the environment.
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Affiliation(s)
- Shiwen Hu
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Yang Lu
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Lanfang Peng
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Pei Wang
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management , University of Wyoming , Laramie , Wyoming 82071 , United States
| | - Alice C Dohnalkova
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Hong Chen
- SLAC National Accelerator Laboratory , Stanford University , Menlo Park , California 94025 , United States
| | - Zhang Lin
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Zhi Dang
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Zhenqing Shi
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy , South China University of Technology , Guangzhou , Guangdong 510006 , People's Republic of China
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12
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Han J, Ro HM. Interpreting competitive adsorption of arsenate and phosphate on nanosized iron (hydr)oxides: effects of pH and surface loading. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:28572-28582. [PMID: 30091077 DOI: 10.1007/s11356-018-2897-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
Arsenate and phosphate have similar properties due to their electrochemical structures, but their environmental impacts are unique. The abundance and competition of arsenate and phosphate determine their bioavailability and leachability; thus, it is essential to understand their fate in the soil environment. In this study, the effects of pH and surface loading on the competitive adsorption of arsenate and phosphate on four iron (hydr)oxides were evaluated by employing the Langmuir isotherm, competitive sorption ratio (CSR), and competition effect (CE). The stability and transformation of the iron (hydr)oxides were also assessed. Various adsorption patterns were observed in the single and mixed treatments by controlling the addition of oxyanions, pH, surface loading, and type of iron (hydr)oxides. Arsenate was preferentially adsorbed at a low pH, whereas phosphate showed the opposite trend. The CEAs(V),P(V) was close to zero at low surface density (no competition) and sequentially changed to negative or positive values with increasing surface density, indirectly indicating the sequential development of promotive and competitive effects. Transformation in goethite was identified at a high pH with the presence of oxyanions, except that no transformation was observed upon the addition of oxyanions and with pH change. However, the stability of the iron (hydr)oxides decreased at a low pH and with the presence of phosphate, arsenate, or both. The hematite showed a significant promotive effect regardless of the pH. Our study revealed that the pH, surface loading, and type of iron (hydr)oxides are intercorrelated and simultaneously affect the adsorption characteristics of oxyanions and the stability of iron (hydr)oxides.
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Affiliation(s)
- Junho Han
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hee-Myong Ro
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
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13
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Wang D, Gilliland SE, Yi X, Logan K, Heitger DR, Lucas HR, Wang WN. Iron Mesh-Based Metal Organic Framework Filter for Efficient Arsenic Removal. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018. [PMID: 29513011 DOI: 10.1021/acs.est.7b06212] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Efficient oxidation from arsenite [As(III)] to arsenate [As(V)], which is less toxic and more readily to be adsorbed by adsorbents, is important for the remediation of arsenic pollution. In this paper, we report a metal organic framework (MIL-100(Fe)) filter to efficiently remove arsenic from synthetic groundwater. With commercially available iron mesh as a substrate, MIL-100(Fe) is implanted through an in situ growth method. MIL-100(Fe) is able to capture As(III) due to its microporous structure, superior surface area, and ample active sites for As adsorption. This approach increases the localized As concentration around the filter, where Fenton-like reactions are initiated by the Fe2+/Fe3+ sites within the MIL-100(Fe) framework to oxidize As(III) to As(V). The mechanism was confirmed by colorimetric detection of H2O2, fluorescence, and electron paramagnetic resonance detection of ·OH. With the aid of oxygen bubbling and Joule heating, the removal efficiency of As(III) can be further boosted. The MIL-100(Fe)-based filter also exhibits satisfactory structural stability and recyclability. Notably, the adsorption capacity of the filter can be regenerated satisfactorily. Our results demonstrate the potential of this filter for the efficient remediation of As contamination in groundwater.
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14
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Yan D, Li HJ, Cai HQ, Wang M, Wang CC, Yi HB, Min XB. Microscopic insight into precipitation and adsorption of As(V) species by Fe-based materials in aqueous phase. CHEMOSPHERE 2018; 194:117-124. [PMID: 29197814 DOI: 10.1016/j.chemosphere.2017.11.150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 11/22/2017] [Accepted: 11/25/2017] [Indexed: 06/07/2023]
Abstract
The mechanism of As(V) removal from the drinking water and industrial effluents by iron materials remains unclear at the molecular level. In this work, the association of Fe-based materials with As(V) species was explored using density functional theory and ab initio calculations. Solvent separated ion pair structures of [FeH2AsO4]2+aq species may be dominant in an acidic solution of FeAs complex. The association trend of H2AsO4- species by Fe3+aq is found to be quite weak in the aqueous solution, which may be attributed to the strong hydration of Fe3+aq and [FeH2AsO4]2+ species. However, the association of H2AsO4- species by colloidal clusters is quite strong, due to the weakened hydration of Fe(III) in colloidal structures. The hydrophobicity of Fe-based materials may be one of the key factors for their As(V) removal efficiency in an aqueous phase. When the number of OH- coordinated with Fe(III) increases, the association trend of As(V) by colloidal ferric hydroxides weakens accordingly. This study provides insights into understanding the coprecipitation and adsorption mechanisms of arsenate removal and revealing the high efficiency of arsenate removal by colloidal ferric hydroxides or iron salts under moderate pH conditions.
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Affiliation(s)
- Dan Yan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Hui-Ji Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Hou-Qin Cai
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Mei Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Chun-Chang Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Hai-Bo Yi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China.
| | - Xiao-Bo Min
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, School of Metallurgy and Environment, Central South University, Changsha 410083, China.
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15
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Gude JCJ, Rietveld LC, van Halem D. As(III) oxidation by MnO 2 during groundwater treatment. WATER RESEARCH 2017; 111:41-51. [PMID: 28040540 DOI: 10.1016/j.watres.2016.12.041] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 12/23/2016] [Accepted: 12/24/2016] [Indexed: 06/06/2023]
Abstract
The top layer of natural rapid sand filtration was found to effectively oxidise arsenite (As(III)) in groundwater treatment. However, the oxidation pathway has not yet been identified. The aim of this study was to investigate whether naturally formed manganese oxide (MnO2), present on filter grains, could abiotically be responsible for As(III) oxidation in the top of a rapid sand filter. For this purpose As(III) oxidation with two MnO2 containing powders was investigated in aerobic water containing manganese(II) (Mn(II)), iron(II) (Fe(II)) and/or iron(III) (Fe(III)). The first MnO2 powder was a very pure - commercially available - natural MnO2 powder. The second originated from a filter sand coating, produced over 22 years in a rapid filter during aeration and filtration. Jar test experiments showed that both powders oxidised As(III). However, when applying the MnO2 in aerated, raw groundwater, As(III) removal was not enhanced compared to aeration alone. It was found that the presence of Fe(II)) and Mn(II) inhibited As(III) oxidation, as Fe(II) and Mn(II) adsorption and oxidation were preferred over As(III) on the MnO2 surface (at pH 7). Therefore it is concluded that just because MnO2 is present in a filter bed, it does not necessarily mean that MnO2 will be available to oxidise As(III). However, unlike Fe(II), the addition of Fe(III) did not hinder As(III) oxidation on the MnO2 surface; resulting in subsequent effective As(V) removal by the flocculating hydrous ferric oxides.
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Affiliation(s)
- J C J Gude
- Delft University of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands.
| | - L C Rietveld
- Delft University of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands
| | - D van Halem
- Delft University of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands
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16
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Yang JC, Yin XB. CoFe 2O 4@MIL-100(Fe) hybrid magnetic nanoparticles exhibit fast and selective adsorption of arsenic with high adsorption capacity. Sci Rep 2017; 7:40955. [PMID: 28102334 PMCID: PMC5244426 DOI: 10.1038/srep40955] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 12/14/2016] [Indexed: 01/22/2023] Open
Abstract
In this study, we report the synthesis and application of mesoporous CoFe2O4@MIL-100(Fe) hybrid magnetic nanoparticles (MNPs) for the simultaneous removal of inorganic arsenic (iAs). The hybrid adsorbent had a core-shell and mesoporous structure with an average diameter of 260 nm. The nanoscale size and mesoporous character impart a fast adsorption rate and high adsorption capacity for iAs. In total, 0.1 mg L−1 As(V) and As(III) could be adsorbed within 2 min, and the maximum adsorption capacities were 114.8 mg g−1 for As(V) and 143.6 mg g−1 for As(III), higher than most previously reported adsorbents. The anti-interference capacity for iAs adsorption was improved by the electrostatic repulsion and size exclusion effects of the MIL-100(Fe) shell, which also decreased the zero-charge point of the hybrid absorbent for a broad pH adsorption range. The adsorption mechanisms of iAs on the MNPs are proposed. An Fe-O-As structure was formed on CoFe2O4@MIL-100(Fe) through hydroxyl substitution with the deprotonated iAs species. Monolayer adsorption of As(V) was observed, while hydrogen bonding led to the multi-layer adsorption of neutral As(III) for its high adsorption capacity. The high efficiency and the excellent pH- and interference-tolerance capacities of CoFe2O4@MIL-100(Fe) allowed effective iAs removal from natural water samples, as validated with batch magnetic separation mode and a portable filtration strategy.
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Affiliation(s)
- Ji-Chun Yang
- State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xue-Bo Yin
- State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, Tianjin, 300071, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300071, China
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17
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Affiliation(s)
- X Chris Le
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta T6G 2G3, Canada.
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18
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Feng Q, Liu S, Mao Z, Xu J, Wang Z, Le XC. Cover features and new Associate Editors of the Journal of Environmental Sciences. J Environ Sci (China) 2016; 48:1-5. [PMID: 27745653 DOI: 10.1016/j.jes.2016.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Qingcai Feng
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Suqin Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhengang Mao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jian Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zixuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - X Chris Le
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta T6G 2G3, Canada.
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19
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Hao J, Han MJ, Han S, Meng X, Su TL, Wang QK. SERS detection of arsenic in water: A review. J Environ Sci (China) 2015; 36:152-62. [PMID: 26456617 DOI: 10.1016/j.jes.2015.05.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 05/19/2015] [Accepted: 05/21/2015] [Indexed: 05/19/2023]
Abstract
Arsenic (As) is one of the most toxic contaminants found in the environment. Development of novel detection methods for As species in water with the potential for field use has been an urgent need in recent years. In past decades, surface-enhanced Raman scattering (SERS) has gained a reputation as one of the most sensitive spectroscopic methods for chemical and biomolecular sensing. The SERS technique has emerged as an extremely promising solution for in-situ detection of arsenic species in the field, particularly when coupled with portable/handheld Raman spectrometers. In this article, the recent advances in SERS analysis of arsenic species in water media are reviewed, and the potential of this technique for fast screening and field testing of arsenic-contaminated environmental water samples is discussed. The problems that remain in the field are also discussed and an outlook for the future is featured at the end of the article.
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Affiliation(s)
- Jumin Hao
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA; Agiltron Inc., 15 Presidential Way, Woburn, MA 01801, USA.
| | - Mei-Juan Han
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Songman Han
- Department of Chemical Engineering, Renai College of Tianjin University, Tianjin 301636, China
| | - Xiaoguang Meng
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Tsan-Liang Su
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Qingwu K Wang
- Agiltron Inc., 15 Presidential Way, Woburn, MA 01801, USA
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20
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Mladenov N, Zheng Y, Simone B, Bilinski TM, McKnight DM, Nemergut D, Radloff KA, Rahman MM, Ahmed KM. Dissolved Organic Matter Quality in a Shallow Aquifer of Bangladesh: Implications for Arsenic Mobility. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:10815-24. [PMID: 26192081 PMCID: PMC5986556 DOI: 10.1021/acs.est.5b01962] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In some high arsenic (As) groundwater systems, correlations are observed between dissolved organic matter (DOM) and As concentrations, but in other systems, such relationships are absent. The role of labile DOM as the main driver of microbial reductive dissolution is not sufficient to explain the variation in DOM-As relationships. Other processes that may also influence As mobility include complexation of As by dissolved humic substances, and competitive sorption and electron shuttling reactions mediated by humics. To evaluate such humic DOM influences, we characterized the optical properties of filtered surface water (n = 10) and groundwater (n = 24) samples spanning an age gradient in Araihazar, Bangladesh. Further, we analyzed large volume fulvic acid (FA) isolates (n = 6) for optical properties, C and N content, and (13)C NMR spectroscopic distribution. Old groundwater (>30 years old) contained primarily sediment-derived DOM and had significantly higher (p < 0.001) dissolved As concentration than groundwater that was younger than 5 years old. Younger groundwater had DOM spectroscopic signatures similar to surface water DOM and characteristic of a sewage pollution influence. Associations between dissolved As, iron (Fe), and FA concentration and fluorescence properties of isolated FA in this field study suggest that aromatic, terrestrially derived FAs promote As-Fe-FA complexation reactions that may enhance As mobility.
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Affiliation(s)
- Natalie Mladenov
- INSTAAR, University of Colorado , Boulder, Colorado 80309-0450, United States
- Department of Civil, Construction, and Environmental Engineering, San Diego State University , San Diego, California 92182, United States
| | - Yan Zheng
- School of Earth and Environmental Sciences, Queens College, City University of New York , Flushing, New York 11367, United States
- Lamont-Doherty Earth Observatory, Columbia University , Palisades, New York 10964, United States
| | - Bailey Simone
- INSTAAR, University of Colorado , Boulder, Colorado 80309-0450, United States
| | - Theresa M Bilinski
- School of Natural Sciences, St. Edward's University , 3001 S. Congress Ave, Austin, Texas 78704, United States
| | - Diane M McKnight
- INSTAAR, University of Colorado , Boulder, Colorado 80309-0450, United States
| | - Diana Nemergut
- INSTAAR, University of Colorado , Boulder, Colorado 80309-0450, United States
| | - Kathleen A Radloff
- Lamont-Doherty Earth Observatory, Columbia University , Palisades, New York 10964, United States
| | - M Moshiur Rahman
- School of Earth and Environmental Sciences, Queens College, City University of New York , Flushing, New York 11367, United States
- Department of Environmental Science and Management, North South University , Bashundhara, Dhaka-1229, Bangladesh
| | - Kazi Matin Ahmed
- Department of Geology, University of Dhaka , Dhaka-1000, Bangladesh
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21
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Cui J, Jing C, Che D, Zhang J, Duan S. Groundwater arsenic removal by coagulation using ferric(III) sulfate and polyferric sulfate: A comparative and mechanistic study. J Environ Sci (China) 2015; 32:42-53. [PMID: 26040730 DOI: 10.1016/j.jes.2014.10.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 10/10/2014] [Accepted: 10/17/2014] [Indexed: 06/04/2023]
Abstract
Elevated arsenic (As) in groundwater poses a great threat to human health. Coagulation using mono- and poly-Fe salts is becoming one of the most cost-effective processes for groundwater As removal. However, a limitation comes from insufficient understanding of the As removal mechanism from groundwater matrices in the coagulation process, which is critical for groundwater treatment and residual solid disposal. Here, we overcame this hurdle by utilizing microscopic techniques to explore molecular As surface complexes on the freshly formed Fe flocs and compared ferric(III) sulfate (FS) and polyferric sulfate (PFS) performance, and finally provided a practical solution in As-geogenic areas. FS and PFS exhibited a similar As removal efficiency in coagulation and coagulation/filtration in a two-bucket system using 5mg/L Ca(ClO)2. By using the two-bucket system combining coagulation and sand filtration, 500 L of As-safe water (<10 μg/L) was achieved during five treatment cycles by washing the sand layer after each cycle. Fe k-edge X-ray absorption near-edge structure (XANES) and As k-edge extended X-ray absorption fine structure (EXAFS) analysis of the solid residue indicated that As formed a bidentate binuclear complex on ferrihydrite, with no observation of scorodite or poorly-crystalline ferric arsenate. Such a stable surface complex is beneficial for As immobilization in the solid residue, as confirmed by the achievement of much lower leachate As (0.9 μg/L-0.487 mg/L) than the US EPA regulatory limit (5 mg/L). Finally, PFS is superior to FS because of its lower dose, much lower solid residue, and lower cost for As-safe drinking water.
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Affiliation(s)
- Jinli Cui
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Chuanyong Jing
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Dongsheng Che
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Jianfeng Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
| | - Shuxuan Duan
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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22
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Cui J, Du J, Yu S, Jing C, Chan T. Groundwater arsenic removal using granular TiO2: integrated laboratory and field study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:8224-8234. [PMID: 25516251 DOI: 10.1007/s11356-014-3955-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 12/04/2014] [Indexed: 06/04/2023]
Abstract
High concentrations of arsenic (As) in groundwater pose a great threat to human health. The motivation of this study was to provide a practical solution for As-safe water in As geogenic areas using granular TiO2 (GTiO2). The kinetics results indicated that the As (III/V) adsorption on GTiO2 conformed to the Weber-Morris (WM) intraparticle diffusion model. The Langmuir isotherm results suggested that the adsorption capacities for As (III) and As (V) were 106.4 and 38.3 mg/g, respectively. Ion effect study showed that cationic Ca and Mg substantially enhanced As (V) adsorption, whereas no significant impact was observed on As (III). Silicate substantially decreased As (V) adsorption by 57 % and As (III) by 50 %. HCO3 (-) remarkably inhibited As (V) adsorption by 52 %, whereas it slightly reduced As (III) adsorption by 8 %. Field column results demonstrated that ∼700 μg/L As was removed at an empty bed contact time (EBCT) of 1.08 min for 968 bed volumes before effluent As concentration exceeded 10 μg/L, corresponding to 0.96 mg As/g GTiO2. Two household filters loaded with 110 g GTiO2 in the on-off operational mode can provide 6-L/day As-safe drinking water up to 288 and 600 days from the groundwater containing ∼700 μg/L As and ∼217 μg/L As, respectively. Integration of batch experiments and column tests with systematic variation of EBCTs was successfully achieved using PHREEQC incorporating a charge distribution multisite complexation (CD-MUSIC) model and one-dimensional reactive transport block.
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Affiliation(s)
- Jinli Cui
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
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23
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Mallampati R, Valiyaveettil S. Co-precipitation with calcium carbonate – a fast and nontoxic method for removal of nanopollutants from water? RSC Adv 2015. [DOI: 10.1039/c4ra14292f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, scalable and environmentally friendly coprecipitation method using CaCO3 is reported for the removal of nanopollutants from water.
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24
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Yang J, Chai L, Yue M, Li Q. Complexation of arsenate with ferric ion in aqueous solutions. RSC Adv 2015. [DOI: 10.1039/c5ra21836e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ferric arsenate complexes (FeH2AsO42+ and FeHAsO4+) formed in acidic solutions were confirmed by UV-Vis spectroscopic techniques, which transformed into gel-like material under higher pH (pH ≥ 2.38) or higher temperature (T ≥ 90 °C) conditions.
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Affiliation(s)
- Jinqin Yang
- School of Metallurgy and Environment
- Central South University
- 410083 Changsha
- China
| | - Liyuan Chai
- School of Metallurgy and Environment
- Central South University
- 410083 Changsha
- China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution
| | - Mengqing Yue
- School of Metallurgy and Environment
- Central South University
- 410083 Changsha
- China
| | - Qingzhu Li
- School of Metallurgy and Environment
- Central South University
- 410083 Changsha
- China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution
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