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Zhou Y, Wan X, Lei M, Chen T. Arsenic release during groundwater recharge and effects of coexisting ions in a typical inland basin with high arsenic concentration: Modeling and batch experiment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:175359. [PMID: 39122042 DOI: 10.1016/j.scitotenv.2024.175359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 08/03/2024] [Accepted: 08/05/2024] [Indexed: 08/12/2024]
Abstract
Groundwater recharge is a viable solution to groundwater overexploitation. However, the injection of recharge water may break the dissolution balance and induce the release of trace elements especially arsenic (As), which has been identified in river deltas. Only a few studies have been conducted in inland basins with high As concentration, high pH, and low Eh. Aiming to analyze As release with groundwater recharge in inland high-As regions and determine the effects of coexisting ions in recharge water, this study established PHase Equilibria Calculation (PHREEQC) models using rainwater and groundwater data from three inland sedimentary basins with slow groundwater flow in semi-arid regions. The simulations fitted with the batch experiments, achieving an R-squared (R2) of 0.98. The coexisting ions in the recharge water significantly affected As release during recharge. Ca2+ inhibited the release of total arsenic (Total-As) by increasing the surface charge of iron oxides. NO3- inhibited Total-As release by promoting the conversion of trivalent As into pentavalent As. Conversely, HCO3- facilitated As release by competing with arsenate for adsorption sites. On the basis of the modeling and batch experiment results, Total-As release with groundwater recharge was predicted. The results indicated that the high Ca2+ concentration in the recharge water inhibited the As release by 83.5 %, which can be used as a strategy to control As release during groundwater recharge in high-As inland basins.
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Affiliation(s)
- Yanru Zhou
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoming Wan
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
| | - Mei Lei
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Tongbin Chen
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
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Zhang Y, Xie X, Sun S, Wang Y. Coupled redox cycling of arsenic and sulfur regulates thioarsenate enrichment in groundwater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 943:173776. [PMID: 38862046 DOI: 10.1016/j.scitotenv.2024.173776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 06/02/2024] [Accepted: 06/03/2024] [Indexed: 06/13/2024]
Abstract
High‑arsenic groundwater is influenced by a combination of processes: reductive dissolution of iron minerals and formation of secondary minerals, metal complexation and redox reactions of organic matter (OM), and formation of more migratory thioarsenate, which together can lead to significant increases in arsenic concentration in groundwater. This study was conducted in a typical sulfur- and arsenic-rich groundwater site within the Datong Basin to explore the conditions of thioarsenate formation and its influence on arsenic enrichment in groundwater using HPLC-ICPMS, hydrogeochemical modeling, and fluorescence spectroscopy. The shallow aquifer exhibited a highly reducing environment, marked by elevated sulfide levels, low concentrations of Fe(II), and the highest proportion of thioarsenate. In the middle aquifer, an optimal ∑S/∑As led to the presence of significant quantities of thioarsenate. In contrast, the deep aquifer exhibited low sulfide and high Fe(II) concentration, with arsenic primarily originating from dissolved iron minerals. Redox fluctuations in the sediment driven by sulfur‑iron minerals generated reduced sulfur, thereby facilitating thioarsenate formation. OM played a crucial role as an electron donor for microbial activities, promoting iron and sulfate reduction processes and creating conditions conducive to thioarsenate formation in reduced and high‑sulfur environments. Understanding the process of thioarsenate formation and the influencing factors is of paramount importance for comprehending the migration and redistribution of arsenic in groundwater systems.
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Affiliation(s)
- Yuyao Zhang
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Xianjun Xie
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, China University of Geosciences, Wuhan 430078, China.
| | - Shutang Sun
- School of Resource and Environmental Sciences, Wuhan University, 430072, China
| | - Yanxin Wang
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, China University of Geosciences, Wuhan 430078, China
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Demissie S, Mekonen S, Awoke T, Teshome B, Mengistie B. Examining carcinogenic and noncarcinogenic health risks related to arsenic exposure in Ethiopia: A longitudinal study. Toxicol Rep 2024; 12:100-110. [PMID: 38229921 PMCID: PMC10789645 DOI: 10.1016/j.toxrep.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/30/2023] [Accepted: 01/02/2024] [Indexed: 01/18/2024] Open
Abstract
Background The carcinogenic properties of arsenic make it one of the most hazardous chemicals globally. Nevertheless, the exact level of human exposure to arsenic and the associated risks of cancer and non-cancer effects through different pathways in Ethiopia are still uncertain. Objective The primary aim of this study was to evaluate the risk of both cancer and non-cancer outcomes among children and adults who have been exposed to arsenic through drinking water in the Adami Tulu Jido Kombolcha district of Ethiopia. Methods For this study, a longitudinal study design was employed. A total of 45 groundwater sources were sampled using the census sampling method. The concentrations of total arsenic were measured using Agilent 7900 series inductively coupled plasma mass spectrometry. Carcinogenic and noncarcinogenic risk assessments were conducted by calculating lifetime cancer risk and hazard quotients. Microsoft Office Excel was utilized to calculate human health risk indices, and descriptive statistical analysis were performed using SPSS software. Results Our findings revealed that during the dry season, the mean arsenic concentration in the groundwater samples was 11.15 ± 9.38 µg/L, while during the rainy season, it was 10.67 ± 8.16 µg/L. The total cancer risk for children, resulting from oral ingestion and skin contact, was 1.15 × 10-2 and 1.07 × 10-2 during the dry and rainy seasons, respectively. For adults, the total cancer risk from oral ingestion and skin contact during the dry and rainy seasons was 4.95 × 10-3 and 4.59 × 10-3, respectively. Furthermore, the total hazard quotients for children via oral ingestion and skin absorption were 25.9 and 24.0 during the dry and rainy seasons, respectively. For adults, the total hazard quotients from ingestion and dermal contact during the dry and rainy seasons were 11 and 10, respectively. Conclusions The findings indicate that the risks of cancer and non-cancer effects resulting from arsenic exposure through ingestion and dermal exposure were found to exceed the acceptable thresholds in both seasons. These results emphasize the urgent need for focused attention on the study population in the study area due to the high likelihood of experiencing adverse health outcomes.
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Affiliation(s)
- Solomon Demissie
- Department of Water and Public Health, Ethiopian Institute of Water Resources, Addis Ababa University, Ethiopia
| | - Seblework Mekonen
- Department of Water and Public Health, Ethiopian Institute of Water Resources, Addis Ababa University, Ethiopia
| | - Tadesse Awoke
- Department of Epidemiology and Biostatistics, University of Gondar, Ethiopia
| | - Birhanu Teshome
- Division of Epidemiology and Biostatistics, Stellenbosch University, South Africa
| | - Bezatu Mengistie
- Department of Water and Public Health, Ethiopian Institute of Water Resources, Addis Ababa University, Ethiopia
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Amorosi A, Sammartino I. Predicting natural arsenic enrichment in peat-bearing, alluvial and coastal depositional systems: A generalized model based on sequence stratigraphy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171571. [PMID: 38492587 DOI: 10.1016/j.scitotenv.2024.171571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/23/2024] [Accepted: 03/06/2024] [Indexed: 03/18/2024]
Abstract
Hazardously high concentrations of arsenic exceeding the threshold limits for soils and drinking waters have been widely reported from Quaternary sedimentary successions and shallow aquifers of alluvial and coastal lowlands worldwide, raising public health concerns due to potential human exposure to arsenic. A combined sedimentological and geochemical analysis of subsurface deposits, 2.5-50 m deep, from the SE Po Plain (Italy) documents a systematic tendency for naturally-occurring arsenic to accumulate in peat-rich layers, with concentrations invariably greater than maximum permissible levels. A total of 366 bulk sediment samples from 40 cores that penetrated peat-bearing deposits were analysed by X-ray fluorescence. Arsenic concentrations associated with 7 peat-free lithofacies associations (fluvial-channel, levee/crevasse, floodplain, swamp, lagoon/bay, beach-barrier, and offshore/prodelta) exhibit background values invariably below threshold levels (<20 mg/kg). In contrast, total arsenic contents from peaty clay and peat showed 2-6 times larger As accumulation. A total of 204 near-surface (0-2.5 m) samples from modern alluvial and coastal depositional environments exhibit the same trends as their deeper counterparts, total arsenic peaking at peat horizons above the threshold values for contaminated soils. The arsenic-bearing, peat-rich Quaternary successions of the Po Plain accumulated under persisting reducing conditions in wetlands of backstepping estuarine and prograding deltaic depositional environments during the Early-Middle Holocene sea-level rise and subsequent stillstand. Contamination of the Holocene and underlying Pleistocene aquifer systems likely occurred through the release of As by microbially-mediated reductive dissolution. Using high-resolution sequence-stratigraphic concepts, we document that the Late Pleistocene-Holocene lithofacies architecture dictates the subsurface distribution of As. The "wetland trajectory", i.e. the path taken by the landward/seaward shift of peat-rich depositional environments during the Holocene, may help predict spatial patterns of natural As distribution, delineating the highest As-hazard zones and providing a realistic view of aquifer contamination even in unknown areas.
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Affiliation(s)
- Alessandro Amorosi
- Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via Zamboni 67, 40126 Bologna, Italy.
| | - Irene Sammartino
- National Research Council (CNR), Institute of Marine Science (ISMAR), Via Gobetti 101, 40129 Bologna, Italy.
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Dresler SR, Pinto BI, Salanga MC, Propper CR, Berry SR, Kellar RS. Arsenic Impairs Wound Healing Processes in Dermal Fibroblasts and Mice. Int J Mol Sci 2024; 25:2161. [PMID: 38396835 PMCID: PMC10888720 DOI: 10.3390/ijms25042161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/03/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Inorganic arsenic (NaAsO2) is a naturally occurring metalloid found in water resources globally and in the United States at concentrations exceeding the U.S. Environmental Protection Agency Maximum Contamination Level of 10 ppb. While exposure to arsenic has been linked to cancer, cardiovascular disease, and skin lesions, the impact of arsenic exposure on wound healing is not fully understood. Cultured dermal fibroblasts exposed to NaAsO2 displayed reduced migration (scratch closure), proliferation, and viability with a lowest observable effect level (LOEL) of 10 µM NaAsO2 following 24 h exposure. An enrichment of Matrix Metalloproteinase 1 (MMP1) transcripts was observed at a LOEL of 1 µM NaAsO2 and 24 h exposure. In vivo, C57BL/6 mice were exposed to 10 µM NaAsO2 in their drinking water for eight weeks, then subjected to two full thickness dorsal wounds. Wounds were evaluated for closure after 6 days. Female mice displayed a significant reduction in wound closure and higher erythema levels, while males showed no effects. Gene expression analysis from skin excised from the wound site revealed significant enrichment in Arsenic 3-Methyltransferase (As3mt) and Estrogen Receptor 2 (Esr2) mRNA in the skin of female mice. These results indicate that arsenic at environmentally relevant concentrations may negatively impact wound healing processes in a sex-specific manner.
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Affiliation(s)
- Sara R. Dresler
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Bronson I. Pinto
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Matthew C. Salanga
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Catherine R. Propper
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Savannah R. Berry
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Robert S. Kellar
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
- Center for Materials Interfaces in Research & Applications, ¡MIRA!, Flagstaff, AZ 86011, USA
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Covatti G, Hoang TNA, Grischek T. Release of arsenic during riverbank filtration under anoxic conditions linked to grain size of riverbed sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 900:165858. [PMID: 37516192 DOI: 10.1016/j.scitotenv.2023.165858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 07/31/2023]
Abstract
Geogenic arsenic contamination of groundwater poses a health threat to millions of people worldwide, particularly in Asia. Riverbank filtration (RBF) is a pre-treatment technique that aims to improve surface water quality through natural processes during water infiltration before abstraction. A study in Hanoi, Vietnam is presented, where the water quality of 48 RBF wells from 5 large well fields located in the Pleistocene aquifer along the Red River was analyzed. >80 % of the wells had arsenic concentrations above the WHO limit of 10 μg/l. The riverbed sediment and riverbed pore-water from 23 sites along a stretch of 30 km of the Red River near the well fields was also analyzed. Muddy riverbeds were found to be a hotspot for arsenic release. Already at a 30 cm depth from the riverbed sediment surface, the pore-water at many sites had high concentrations of arsenic (>100 μg/l). Arsenic concentrations in the pore-water of sites where mud lenses were present in the riverbed were significantly higher compared to sites with sandy riverbeds. At well fields along stretches of the Red River where riverbed was mostly muddy, higher arsenic concentrations were found than at well fields where the riverbed was mostly sandy. This indicates that river muds deposition and river morphology can influence arsenic concentrations in the aquifer in Hanoi and potentially other RBF sites in regions with geogenic arsenic contamination. At the end, recommendations regarding site selection of new potential RBF wells in affected regions is given.
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Affiliation(s)
- Gustavo Covatti
- Dresden University of Applied Sciences, Friedrich-List-Platz 1, 01069 Dresden, Germany.
| | - Thi Ngoc Anh Hoang
- Dresden University of Applied Sciences, Friedrich-List-Platz 1, 01069 Dresden, Germany
| | - Thomas Grischek
- Dresden University of Applied Sciences, Friedrich-List-Platz 1, 01069 Dresden, Germany
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Ansari MA, Saravana Kumar U, Noble J, Akhtar N, Akhtar MA, Deodhar A. Isotope hydrology tools in the assessment of arsenic contamination in groundwater: An overview. CHEMOSPHERE 2023; 340:139898. [PMID: 37607597 DOI: 10.1016/j.chemosphere.2023.139898] [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: 11/24/2022] [Revised: 07/27/2023] [Accepted: 08/19/2023] [Indexed: 08/24/2023]
Abstract
Groundwater is important for the survival of humanity and the demand for the same is drastically increasing globally. The precious water resources are under constant threat, either as a result of natural processes or due to the influence of the anthropogenic activities. Arsenic contamination of groundwater is one of those threats that have affected approximately over 500 million people in 107 countries globally. Although, many studies (∼1000 Nos.) have been carried out on arsenic hydrogeobiochemistry, only a few have reported, on the use of different isotopes in understanding the arsenic hydrochemistry, and its release mechanism and mobilization. Determination of the isotopic composition of a groundwater sample and its dissolved compounds enable a better insight into the hydrological processes that control the distribution and migration of arsenic in the subsurface hydrological system. The environmental isotopes of water molecules (δ18O and δ2H) have been widely used to assess the groundwater origin, its recharge mechanisms, the rock-water interactions and quality. The stable isotopes of dissolved compounds of water (δ34S, δ15N, δ13C, δ56Fe etc.) give better information on the reaction processes within these elements and thus act as a tracer for contaminants, while the radioactive isotopes, such as 14C, 3H, 81Kr, 36Cl, 39Ar etc., can be used to assess the residence time of groundwater and its renewability. This article reviews the different uses of environmental isotopes as tools for providing critical information on various hydrological processes in the arsenic contaminated regions that can't be obtained through conventional tools for better management of the groundwater resources.
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Affiliation(s)
- Md Arzoo Ansari
- Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Trombay, Mumbai- 400085, India
| | - U Saravana Kumar
- Isotope Hydrology Section, Division of Physical and Chemical Sciences, International Atomic Energy Agency (IAEA), Vienna, Austria.
| | - Jacob Noble
- Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Trombay, Mumbai- 400085, India
| | - Naima Akhtar
- Central Groundwater Board, North-West Region, Chandigarh - 160019, India
| | - M Arslaan Akhtar
- Geoscience Division, Indian Institute of Remote Sensing, Indian Space Research Organisation (ISRO), Dehradun- 248001, India
| | - Archana Deodhar
- Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Trombay, Mumbai- 400085, India
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Kwak E, Kim JH, Lee S. Longevity evaluation of non-pumping reactive wells for control of groundwater contamination: Application of upscaling methods. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122136. [PMID: 37419206 DOI: 10.1016/j.envpol.2023.122136] [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: 03/06/2023] [Revised: 06/28/2023] [Accepted: 07/01/2023] [Indexed: 07/09/2023]
Abstract
Non-pumping reactive wells (NPRWs) are subsurface structures used for the passive treatment of contaminated groundwater using wells containing reactive media. In the vicinity of NPRWs, a combination of hydrogeological and chemical processes makes it difficult to predict their longevity. In this study, we evaluated the longevity of NPRWs using the upscaling methods. A horizontal two-dimensional sandbox was constructed to mimic the hydrogeological and chemical processes in a single unit of NPRW (unit NPRW). The groundwater flow and solute transport were simulated numerically to validate the processes of contaminant spreading prevention in the sandbox. Dye tracing and arsenic transport tests showed different performance of NPRW due to induced flow and uneven consumption of reactivity, which is dependent on the pathway length and residence time of the coal waste. Through numerical modeling of the experiments, the fate-related processes of contamination around NPRW were described in detail in both spatial and temporal terms. The stepwise approach of the upscaling methods was used to predict the contamination-blocking performance of the entire facility based on the reactivity of the materials and the contamination removal of the unit NPRW.
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Affiliation(s)
- Eunjie Kwak
- Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Jae-Hyun Kim
- Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Soonjae Lee
- Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
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Sarath KV, Shaji E, Nandakumar V. Characterization of trace and heavy metal concentration in groundwater: A case study from a tropical river basin of southern India. CHEMOSPHERE 2023; 338:139498. [PMID: 37451633 DOI: 10.1016/j.chemosphere.2023.139498] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
This study investigates the hydrogeochemistry of groundwater samples collected from the Shiriya River Basin (SRB), a tropical watershed located in Kasaragod, Kerala, southern India, with a special focus on trace elements. Fifty-four groundwater samples were collected from deep aquifers, which constitute weathered and fractured granitoids and mafic rocks, and the groundwater is tapped by bore wells from a fractured zone at a depth range of 60-100 m. Concentrations of Sr, Li, Ba, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Cd, Ag, Au, Te, Pb, Re, and PGEs in groundwater were determined by using Q-ICPMS. Out of the 25 analysed trace elements in groundwater, only Sr (489.6 μg/L), Ba (226 μg/L), Li (11.76 μg/L) Mn (396.8 μg/L), Ni (68 μg/L) and Fe (2438.5 μg/L) show anomalous values. The PGEs and the majority of trace elements show values within the permissible limit. Raman spectral studies reveal the presence of celsian in aquifer rocks and are the source of Ba in groundwater. Further, XRF data of the rocks show a high enrichment of Fe and Mn in mafic dyke, basalt, and syenite, and Ba and Sr in granite, pegmatite, and granitic gneiss. Therefore, this study proved that the source of these elements is geogenic, i.e., they are released from the crystalline aquifer through rock-water interaction under alkaline conditions. The results of this study show that the groundwater of the basin has enough metals such as Na, K, Mg, Ca, Mn, Fe, Co, Cu, and Zn, which are good for health. Nevertheless, a few metals (Fe, Mn, Ba, Sr, Li, Ni) that may exert toxic effects on humans are also present in the groundwater of the SRB. As groundwater is found to be a dependable source of drinking water in such watersheds, a comprehensive study on the hydrogeochemistry of all watersheds in tropical regions is recommended.
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Affiliation(s)
- K V Sarath
- Department of Geology, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India
| | - E Shaji
- Department of Geology, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India.
| | - V Nandakumar
- National Centre for Earth Science Studies, Ministry of Earth Sciences, Government of India, Akkulam, Thiruvananthapuram, Kerala, 695011, India
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Shinkareva G, Erina O, Tereshina M, Sokolov D, Lychagin M, Kasimov N. Anthropogenic factors affecting the Moskva River water quality: levels and sources of nutrients and potentially toxic elements in Moscow metropolitan area. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:3113-3141. [PMID: 36163533 DOI: 10.1007/s10653-022-01393-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 09/10/2022] [Indexed: 06/01/2023]
Abstract
This study aims to identify the main patterns of distribution and sources of pollutants in the Moskva River and their influence on river water quality under different levels of anthropogenic stress caused by the largest megacity in Europe - Moscow. For this study, we determined concentrations of 18 trace elements, nutrient elements and major ions, chemical and biochemical oxygen demand, and physical parameters of water at 45 stations on the Moskva River and 20 stations on its tributaries during spring flood and low water of 2019 and 2020 to identify the extent and mechanisms of urban impact on its water chemistry. Chemical elements concentrations have been determined using ICP-MS and ICP-AES methods. Mn, Al, Cu, Sr, Zn, B, Mo, and inorganic nitrogen were outlined as key pollutants according to various drinking water and environmental guidelines. Using correlation and factor analysis, five groups of elements were identified, corresponding to different drivers controlling their unequal distribution within the watershed: mineral sources (Sr, Li, B, Mo, Ca), sewage and road runoff (TN, TP, Sb, Ni, N-NO2, BOD5, COD, V, Zn), impact of acidic wetlands (Al, COD, Zr, Bi), groundwater and landfills leachate (V, As, Pb, U, Sb), and industrial activities (Zn, Cu). Water quality in the Moskva Basin on the whole is good according to the CCME Water Quality Index. Local deterioration of water quality to marginal and even fair (depending on the reference water quality guideline) is confined to the Moskva River part downstream from the Kuryanovo aeration station to the Moskva mouth and to the mouths of several heavily contaminated tributaries.
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Affiliation(s)
- Galina Shinkareva
- Faculty of Geography, Lomonosov Moscow State University, Leninskie gory 1, Moscow, Russian Federation, 119991.
| | - Oxana Erina
- Faculty of Geography, Lomonosov Moscow State University, Leninskie gory 1, Moscow, Russian Federation, 119991
| | - Maria Tereshina
- Faculty of Geography, Lomonosov Moscow State University, Leninskie gory 1, Moscow, Russian Federation, 119991
| | - Dmitriy Sokolov
- Faculty of Geography, Lomonosov Moscow State University, Leninskie gory 1, Moscow, Russian Federation, 119991
| | - Mikhail Lychagin
- Faculty of Geography, Lomonosov Moscow State University, Leninskie gory 1, Moscow, Russian Federation, 119991
| | - Nikolay Kasimov
- Faculty of Geography, Lomonosov Moscow State University, Leninskie gory 1, Moscow, Russian Federation, 119991
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11
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Suzuki S, Katoh M. Impact of arsenic releaching from excavated rock after once-arsenic leaching on potential arsenic leaching. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:3277-3291. [PMID: 36279073 DOI: 10.1007/s10653-022-01418-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 10/08/2022] [Indexed: 06/01/2023]
Abstract
Massive quantities of naturally arsenic-containing rocks are excavated from urbanized and mountainous areas for construction. Treatments such as chemical immobilization are applied to such excavated rocks for reuse. To design such treatments, determining the potentially leachable arsenic amounts in excavated rocks is imperative. This study aims to understand whether the arsenic releached amount from the excavated rock after once-arsenic leaching should be included in the potentially leachable arsenic amount or estimated using the sequential extraction procedure (SEP). Arsenic was releached at exceeding 0.01 mg L-1, even from the excavated rock that leached arsenic to less than 0.01 mg L-1, and this amount corresponded to approximately 12% of that of arsenic leached from the arsenic non-leached rock. The arsenic (re)leached amount corresponded to 84-116% (102 ± 7%) of that of arsenic in the readily soluble fraction using SEP, regardless of whether the arsenic was leached or not. These results indicate that the source of arsenic (re)leached from the excavated rock is arsenic extracted as the readily soluble fraction through SEP, regardless of whether the rock was arsenic-leached or not. This study's findings suggest that the arsenic releached amount from the excavated rock should be considered in the potentially leachable arsenic amount. In addition, the potentially leachable arsenic amount can be relatively and readily estimated by performing SEP.
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Affiliation(s)
- Shoji Suzuki
- Department of Agricultural Chemistry, Graduate School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan
- Technical Research Institute, Okumura Corporation, 387 Ohsuna, Tsukuba, 300-2612, Japan
| | - Masahiko Katoh
- Department of Agricultural Chemistry, School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan.
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Nieder R, Benbi DK. Potentially toxic elements in the environment - a review of sources, sinks, pathways and mitigation measures. REVIEWS ON ENVIRONMENTAL HEALTH 2023; 0:reveh-2022-0161. [PMID: 37118984 DOI: 10.1515/reveh-2022-0161] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/06/2023] [Indexed: 06/19/2023]
Abstract
Pollution of ecosystems with potentially toxic elements (PTEs) has become a global problem with serious consequences for public health. The PTEs are hazardous to humans owing to their longevity, toxicity, and ability to accumulate in the biotic environment. As most PTEs cannot be degraded microbially or chemically, they can persist in soils for a long time. Besides posing a threat to landsphere, they may be transported to surrounding environmental spheres through movement of water, atmospheric circulation, and biological transmission. This can severely affect the ecological equilibrium. Accumulation of PTEs in soils pose serious health hazards to higher organisms leading to various diseases and disorders and significant relationships exist between the occurrence of PTEs and the toxic effects in humans. In natural soils, PTEs accumulate due to weathering of rocks and ores. Furthermore, locally or regionally significant accumulation of PTEs in soils may occur from industrial goods, pesticides and paints, municipal and industrial waste, fertilizer application, mining activities and atmospheric deposition. In response to the growing need to address PTE contamination, remediation methods have been developed employing mechanical, physico-chemical or biological based technologies. In this review, we discuss sources, sinks, pathways and mitigation measures related to natural and anthropogenic PTEs. We focus on As, Cd, Cr, Hg and Pb which are highly toxic and perform no physiological functions in biota. Further, these are the most widely studied PTEs.
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Affiliation(s)
- Rolf Nieder
- Institute of Geoecology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Dinesh K Benbi
- Department of Soil Science, Punjab Agricultural University, Ludhiana, India
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13
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Shakya A, Dodson M, Artiola JF, Ramirez-Andreotta M, Root RA, Ding X, Chorover J, Maier RM. Arsenic in Drinking Water and Diabetes. WATER 2023; 15:1751. [PMID: 37886432 PMCID: PMC10601382 DOI: 10.3390/w15091751] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Arsenic is ubiquitous in soil and water environments and is consistently at the top of the Agency for Toxic Substances Disease Registry (ATSDR) substance priority list. It has been shown to induce toxicity even at low levels of exposure. One of the major routes of exposure to arsenic is through drinking water. This review presents current information related to the distribution of arsenic in the environment, the resultant impacts on human health, especially related to diabetes, which is one of the most prevalent chronic diseases, regulation of arsenic in drinking water, and approaches for treatment of arsenic in drinking water for both public utilities and private wells. Taken together, this information points out the existing challenges to understanding both the complex health impacts of arsenic and to implementing the treatment strategies needed to effectively reduce arsenic exposure at different scales.
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Affiliation(s)
- Aryatara Shakya
- Department Pharmacology & Toxicology, University of Arizona, Tucson, AZ 85721, USA
| | - Matthew Dodson
- Department Pharmacology & Toxicology, University of Arizona, Tucson, AZ 85721, USA
| | - Janick F. Artiola
- Department Environmental Science, University of Arizona, Tucson, AZ 85721, USA
| | | | - Robert A. Root
- Department Environmental Science, University of Arizona, Tucson, AZ 85721, USA
| | - Xinxin Ding
- Department Pharmacology & Toxicology, University of Arizona, Tucson, AZ 85721, USA
| | - Jon Chorover
- Department Environmental Science, University of Arizona, Tucson, AZ 85721, USA
| | - Raina M. Maier
- Department Environmental Science, University of Arizona, Tucson, AZ 85721, USA
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14
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Shan H, Mo H, Liu Y, Zeng C, Peng S, Zhan H. As(III) removal by a recyclable granular adsorbent through dopping Fe-Mn binary oxides into graphene oxide chitosan. Int J Biol Macromol 2023; 237:124184. [PMID: 36972821 DOI: 10.1016/j.ijbiomac.2023.124184] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/01/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023]
Abstract
Graphene oxide chitosan composite (GOCS) is recognized as an environmentally friendly composite adsorbent because of its stability and abundant functional groups to adsorb heavy metals, and Fe-Mn binary oxides (FMBO) have attracted increasing interest due to their high removal capacity of As(III). However, GOCS is often inefficient for heavy metal adsorption and FMBO suffers poor regeneration for As(III) removal. In this study, we have proposed a method of dopping FMBO into GOCS to obtain a recyclable granular adsorbent (Fe/MnGOCS) for achieving As(III) removal from aqueous solutions. Characterization of BET, SEM-EDS, XRD, FTIR, and XPS are carried out to confirm the formation of Fe/MnGOCS and As(III) removal mechanism. Batch experiments are conducted to investigate the effects of operational factors (pH, dosage, coexisting ions, etc.), as well as kinetic, isothermal, and thermodynamic processes. Results show that the removal efficiency (Re) of As(III) by Fe/MnGOCS is about 96 %, which is much higher than those of FeGOCS (66 %), MnGOCS (42 %), and GOCS (8 %), and it increases slightly with the increasing molar ratio of Mn and Fe. This is because amorphous Fe (hydro)oxides (mainly in the form of ferrihydrite) complexation with As(III) is the major mechanism to remove As(III) from aqueous solutions, and it is accompanied by As(III) oxidation mediated by Mn oxides and the complexation of As(III) with oxygen-containing functional groups of GOCS. Charge interaction plays a weaker role in As(III) adsorption, therefore Re is persistently high over a wide range of pH values of 3-10. But the coexisting PO43- can greatly decrease Re by 24.11 %. As(III) adsorption on Fe/MnGOCS is endothermic and its kinetic process is controlled by pseudo-second-order with a determination coefficient of 0.95. Fitted by the Langmuir isotherm, the maximum adsorption capacity is 108.89 mg/g at 25 °C. After four times regeneration, there is only a slight decrease of <10 % for the Re value. Column adsorption experiments show that Fe/MnGOCS can effectively reduce As(III) concentration from 10 mg/L to <10 μg/L. This study provides new insights into binary polymer composite modified by binary metal oxides to efficiently remove heavy metals from aquatic environments.
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Affiliation(s)
- Huimei Shan
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China.
| | - Huinan Mo
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Yunquan Liu
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Chunya Zeng
- Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Sanxi Peng
- College of Earth Science, Guilin University of Technology, Guilin 541004, China
| | - Hongbin Zhan
- Department of Geology & Geophysics, Texas A&M University, College Station 77843, USA.
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15
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Biswas T, Pal SC, Chowdhuri I, Ruidas D, Saha A, Islam ARMT, Shit M. Effects of elevated arsenic and nitrate concentrations on groundwater resources in deltaic region of Sundarban Ramsar site, Indo-Bangladesh region. MARINE POLLUTION BULLETIN 2023; 188:114618. [PMID: 36682305 DOI: 10.1016/j.marpolbul.2023.114618] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
An attempt has been adopted to predict the As and NO3- concentration in groundwater (GW) in fast-growing coastal Ramsar region in eastern India. This study is focused to evaluate the As and NO3- vulnerable areas of coastal belts of the Indo-Bangladesh Ramsar site a hydro-geostrategic region of the world by using advanced ensemble ML techniques including NB-RF, NB-SVM and NB-Bagging. A total of 199 samples were collected from the entire study area for utilizing the 12 GWQ conditioning factors. The predicted results are certified that NB-Bagging the most suitable and preferable model in this current research. The vulnerability of As and NO3- concentration shows that most of the areas are highly vulnerable to As and low to moderately vulnerable to NO3. The reliable findings of this present study will help the management authorities and policymakers in taking preventive measures in reducing the vulnerability of water resources and corresponding health risks.
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Affiliation(s)
- Tanmoy Biswas
- Department of Geography, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | - Subodh Chandra Pal
- Department of Geography, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India.
| | - Indrajit Chowdhuri
- Department of Geography, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | - Dipankar Ruidas
- Department of Geography, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | - Asish Saha
- Department of Geography, The University of Burdwan, Purba Bardhaman, West Bengal 713104, India
| | | | - Manisa Shit
- Department of Geography, Raiganj University, Raiganj, Uttar Dinajpur, West Bengal 733134, India
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16
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Xu J, Chen Z, Li Y, Dong S, Li L, Long S, Wu Y, Wang S. The changes in the physicochemical properties of calcareous soils and the factors of arsenic (As) uptake by wheat were investigated after the cessation of effluent irrigation for nearly 20 years. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 859:160171. [PMID: 36379339 DOI: 10.1016/j.scitotenv.2022.160171] [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: 09/23/2022] [Revised: 10/31/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
It is not known what the buffering capacity of soils and arsenic (As) enrichment by crops is for calcareous agricultural soils after the end of long-term effluent irrigation. In this study, changes in soil physicochemical properties and factors of influencing As uptake by wheat were investigated in agricultural soils where sewage irrigation had been ceased for nearly 20 years. The results showed that the content of CaCO3 and pH in soil increased compared to the period before the cessation of sewage irrigation, but remained below the soil background value. Furthermore, CaCO3 is by far the main buffering substance in agricultural soils and indirectly contributes to the increase in pH. The As concentration in the soil was 36.4 ± 34.8 mg/kg, which was 0.56-10.28 times and 0.28-5.18 times higher than the soil background and risk screening values, respectively, but showed a decreasing trend. pH and Fe dissolution were the main reasons for the lower As concentration in the soil. Total As in soil was a better predictor of As in wheat, and soil electrical conductivity (EC) and soil organic matter (SOM) promoted As uptake by wheat. The competitive uptake of As by dissolved Si was an important reason for the mismatch between As concentrations in soil and wheat. This study highlighted the key issues of As transport transformation in soil-wheat systems after cessation of effluent irrigation, using agricultural soils, and provided a reference for soil risk management in agricultural soils in mining areas.
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Affiliation(s)
- Jun Xu
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Zhaoming Chen
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Yueyue Li
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Suhang Dong
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Longrui Li
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Song Long
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Yining Wu
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Shengli Wang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
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17
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Mahlknecht J, Aguilar-Barajas I, Farias P, Knappett PSK, Torres-Martínez JA, Hoogesteger J, Lara RH, Ramírez-Mendoza RA, Mora A. Hydrochemical controls on arsenic contamination and its health risks in the Comarca Lagunera region (Mexico): Implications of the scientific evidence for public health policy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159347. [PMID: 36228788 DOI: 10.1016/j.scitotenv.2022.159347] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/30/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Nearly half of the world's urban population depends on aquifers for drinking water. These are increasingly vulnerable to pollution and overexploitation. Besides anthropogenic sources, pollutants such as arsenic (As) are also geogenic and their concentrations have, in some cases, been increased by groundwater pumping. Almost 40 % of Mexico's population relies on groundwater for drinking water purposes; much the aquifers in semi-arid and arid central and northern Mexico is contaminated by As. These are agricultural regions where irrigation water is primarily provided from intenstive pumping of the aquifers leading to long-standing declines in the water table. The focus of this study is the main aquifer within the Comarca Lagunera region in Northern Mexico. Although the scientific evidence demonstrates that health effects are associated with long-term exposure to elevated As concentrations, this knowledge has not yielded effective groundwater development and public health policy. A multidisciplinary approach - including the evaluation of geochemistry, human health risk and development and public health policy - was used to provide a current account of these links. The dissolved As concentrations measured exceeded the corresponding World Health Organization guideline for drinking water in 90 % of the sampled wells; for the population drinking this water, the estimated probability of presenting non-carcinogenic health effects was >90 %, and the lifetime risk of developing cancer ranged from 0.5 to 61 cases in 10,000 children and 0.2 to 33 cases in 10,000 adults. The results suggest that insufficient policy responses are due to a complex and dysfunctional groundwater governance framework that compromises the economic, social and environmental sustainability of this region. These findings may valuable to other regions with similar settings that need to design and enact better informed, science-based policies that recognize the value of a more sustainable use of groundwater resources and a healthier population.
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Affiliation(s)
- Jürgen Mahlknecht
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501, Monterrey 64849, Mexico
| | - Ismael Aguilar-Barajas
- Departamento de Economía, Escuela de Ciencias Sociales y Gobierno, Tecnologico de Monterrey, Campus Monterrey, Monterrey 64849, Mexico
| | - Paulina Farias
- Instituto Nacional de Salud Pública, Universidad No. 655, Colonia Santa María Ahuacatitlán, Cuernavaca 62100, Mexico
| | - Peter S K Knappett
- Department of Geology & Geophysics, Texas A&M University, College Station 77843, USA
| | - Juan Antonio Torres-Martínez
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501, Monterrey 64849, Mexico
| | - Jaime Hoogesteger
- Water Resources Management Group, Wageningen University & Research, Droevendaalsesteeg 3a, 6708 PB Wageningen, the Netherlands
| | - René H Lara
- Facultad de Ciencias Químicas, Departamento de Ciencia de Materiales, Universidad Juárez del Estado de Durango (UJED), Av. Veterinaria S/N, Circuito Universitario, Col. Valle del Sur, 34120 Durango, DGO, Mexico
| | - Ricardo A Ramírez-Mendoza
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501, Monterrey 64849, Mexico
| | - Abrahan Mora
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Puebla, Atlixcáyotl 5718, Puebla de Zaragoza 72453, Mexico.
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18
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Qaiser FUR, Zhang F, Pant RR, Zeng C, Khan NG, Wang G. Characterization and health risk assessment of arsenic in natural waters of the Indus River Basin, Pakistan. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159408. [PMID: 36243075 DOI: 10.1016/j.scitotenv.2022.159408] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 10/06/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
The elevated concentrations of arsenic in natural water are one of the major environmental threats to human health. However, the existing characteristics, controlling mechanisms, and associated risks of arsenic in natural waters in the Indus River Basin (IRB), Pakistan, are yet to be unequivocally understood. In this study, a total of 203 samples of surface water (SW), shallow groundwater (SGW), and deep groundwater (DGW) were collected from the IRB to assess the geochemical characteristics of arsenic and its associated health risks, as all three kinds of waters are the main sources of drinking and domestic usage. The results revealed that the arsenic concentrations in the SW, SGW, and DGW were in the ranges of 1.1-26.45, 1.05-44.44, and 0.67-41.09 μg L-1, respectively. Furthermore, the predominance of As (V) (97 %) over As(III) (3 %) confirmed that the desorption of As in oxidizing environments with elevated pH and Eh is the controlling mechanism. The hazard quotient of 11-45 % and 20-60 % samples and cancer risk of 26-64 % and 26-68 % samples indicated high health risks for the adults and children, respectively, suggesting an immense need for appropriate measures of reducing natural water arsenic concentrations in IRB from the human health perspectives.
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Affiliation(s)
- Faizan Ur Rehman Qaiser
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; China-Pakistan Joint Research Center on Earth Sciences, CAS-HEC, Islamabad 45320, Pakistan; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Earth Sciences, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Fan Zhang
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; China-Pakistan Joint Research Center on Earth Sciences, CAS-HEC, Islamabad 45320, Pakistan; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ramesh Raj Pant
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Central Department of Environmental Science, Tribhuvan University, Nepal
| | - Chen Zeng
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Nangyal Ghani Khan
- Department of Earth Sciences, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Guanxing Wang
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
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Pal S, Singh SK, Singh P, Pal S, Kashiwar SR. Spatial pattern of groundwater arsenic contamination in Patna, Saran, and Vaishali districts of Gangetic plains of Bihar, India. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-022-25105-y. [PMID: 36622595 DOI: 10.1007/s11356-022-25105-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 12/28/2022] [Indexed: 01/10/2023]
Abstract
Groundwater is an essential source of drinking as well as irrigation water. It has recently become a significant challenge to maintain good and safe drinking water for all living beings. The continuous supply of arsenic detected in groundwater poses a severe health problem and has adverse effects on humans and the ecosystem. Researchers also identified arsenic contamination globally across various regions. However, a few studies also identified that the groundwater of Patna, Saran, and Vaishali districts of Bihar is intoxicated by arsenic. To assess the toxic level of arsenic in groundwater, samples from various GPS-based pointed locations were collected from the study area using a GARMIN GPS device. The total concentration of arsenic in drinking water (mostly traces of arsenic, level of μg L-1 or less) can be detected only by sophisticated analytical techniques such as ICP-MS, GF-AAS, and HG-AAS. The standard procedures were followed to determine quality attributes in groundwater. Arsenic contamination persists in most areas and exceeds the permissible limits prescribed by the World Health Organization (WHO), negatively impacting the health of more than 10 million people in the state. The 90.47% and 85.71% groundwater samples of the study area exceeded the permissible limit of the WHO (0.01 mg L-1) and Bureau of Indian Standards (BIS (0.05 mg L-1), respectively. The analyzed data was obtained, and variability was noticed in total arsenic concentrations ranging from 0.002 to 7.801 mg L-1, with a mean value of 0.87 mg L-1. Similarly, the water quality attribute like total dissolved solids were identified in 14.28% of samples, which crossed 201 to 1026 mg L-1, with a mean value of 375.33 mg L-1.
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Affiliation(s)
- Subhajit Pal
- Department of Agriculture Chemistry and Soil Science, BCKV, Mohanpur, West Bengal, India
| | - Sanjay Kumar Singh
- Department of Soil Science, Tirhut College of Agriculture, Dholi, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar, India.
| | - Pankaj Singh
- Department of Soil Science, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar, India
| | - Sukanta Pal
- Department of Agronomy, BCKV, Mohanpur, West Bengal, India
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20
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Warke M, Sarkar D, Zhang Z, Neve S, Datta R. Human health risk mitigation from arsenic in rice by crop rotation with a hyperaccumulator plant. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:12030-12040. [PMID: 36103075 DOI: 10.1007/s11356-022-22985-y] [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: 03/17/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Exposure to arsenic (As) from a diet of contaminated rice is a widespread problem and a serious concern in several parts of the world. There is a need to develop sustainable, effective, and reliable strategies to reduce As accumulation in rice. Our goal was to develop and test a simple crop rotation method of alternating rice with the As hyperaccumulator plant, Chinese brake fern (Pteris vitatta L.), to reduce As concentrations in rice grains. A greenhouse column study was performed for 2 years using As-contaminated rice paddy soil from West Bengal. Rice was grown under flooded conditions and irrigated with As-contaminated water to simulate field conditions. Chinese brake fern was grown between two rice cycles in experimental columns, while control columns were left unplanted. Our results show that at the end of two cycles, there was a statistically significant decrease in soil As concentrations in the treatment columns compared to the control columns. After one rotation with the fern, there was a significant decline in As concentrations in rice grains in treatment plants and a concomitant decline in both noncarcinogenic and carcinogenic health risks. Our results indicate that there could be substantial benefit in implementing this simple crop rotation model to help lower human health risks from As exposure via rice ingestion.
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Affiliation(s)
- Manas Warke
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, MI, 49931, USA
| | - Dibyendu Sarkar
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ, 07030, USA
| | - Zhiming Zhang
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ, 07030, USA
| | - Sameer Neve
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ, 07030, USA
| | - Rupali Datta
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, MI, 49931, USA.
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21
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UV-vis spectrophotometer and smartphone RGB dual mode detection of inorganic arsenic based on hydride generation iodine-starch system. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Niede R, Benbi DK. Integrated review of the nexus between toxic elements in the environment and human health. AIMS Public Health 2022; 9:758-789. [PMID: 36636150 PMCID: PMC9807406 DOI: 10.3934/publichealth.2022052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/16/2022] [Accepted: 11/24/2022] [Indexed: 12/05/2022] Open
Abstract
Emerging pollutants in the environment due to economic development have become a global challenge for environmental and human health management. Potentially toxic elements (PTEs), a major group of pollutants, have been detected in soil, air, water and food crops. Humans are exposed to PTEs through soil ingestion, consumption of water, uptake of food crop products originating from polluted fields, breathing of dust and fumes, and direct contact of the skin with contaminated soil and water. The dose absorbed by humans, the exposure route and the duration (i.e., acute or chronic) determine the toxicity of PTEs. Poisoning by PTEs can lead to excessive damage to health as a consequence of oxidative stress produced by the formation of free radicals and, as a consequence, to various disorders. The toxicity of certain organs includes neurotoxicity, nephrotoxicity, hepatotoxicity, skin toxicity, and cardiovascular toxicity. In the treatment of PTE toxicity, synthetic chelating agents and symptomatic supportive procedures have been conventionally used. In addition, there are new insights concerning natural products which may be a powerful option to treat several adverse consequences. Health policy implications need to include monitoring air, water, soil, food products, and individuals at risk, as well as environmental manipulation of soil, water, and sewage. The overall goal of this review is to present an integrated view of human exposure, risk assessment, clinical effects, as well as therapy, including new treatment options, related to highly toxic PTEs.
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Affiliation(s)
- Rolf Niede
- Institute of Geoecology, Technische Universität Braunschweig, Germany,* Correspondence:
| | - Dinesh K. Benbi
- Department of Soil Science, Punjab Agricultural University, Ludhiana, India
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23
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Choi W, Han DS, Park H. Reactive Halogen Species-Mediated Electrocatalytic Oxidation of Arsenite(III). J Phys Chem A 2022; 126:8459-8467. [DOI: 10.1021/acs.jpca.2c06479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wonjung Choi
- School of Energy Engineering, Kyungpook National University, Daegu41566, Korea
| | - Dong Suk Han
- Center for Advanced Materials, Qatar University, Doha2713, Qatar
| | - Hyunwoong Park
- School of Energy Engineering, Kyungpook National University, Daegu41566, Korea
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24
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Din SU, Hussain B, Haq S, Imran M, Ahmad P, Khandaker MU, Rehman FU, Eldin SM, Mousa AAA, Khan I, Emran TB. Efficient Arsenate Decontamination from Water Using MgO-Itsit Biochar Composite: An Equilibrium, Kinetics and Thermodynamic Study. WATER 2022; 14:3559. [DOI: 10.3390/w14213559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
(1) Background: In this investigation, a composite of MgO nanoparticles with Itsit biochar (MgO-IBC) has been used to remove arsenate from contaminated water. The reduced adsorption capacity of biochar (IBC), due to loss of functionalities under pyrolysis, is compensated for with the composite MgO-IBC. (2) Methods: Batch scale adsorption experiments were conducted by using MgO-IBC as an adsorbent for the decontamination of arsenate from water. Functional groups, elemental composition, surface morphology, and crystallinity of the adsorbent were investigated by using FTIR, EDX, SEM and XRD techniques. The effect of pH on arsenate adsorption by MgO-IBC was evaluated in the pH range of 2 to 8, whereas the temperature effect was investigated in the range of 303 K to 323 K. (3) Results: Both pH and temperature were found to significantly influence the overall adsorption efficiency of MgO-IBC for arsenate adsorption with lower pH and higher temperature being suitable for higher arsenate adsorption. A kinetics study of arsenate adsorption confirmed an equilibrium time of 240 min and a pseudo-second-order model well-explained the kinetic adsorption data, whereas the Langmuir model best fitted with the equilibrium arsenate adsorption data. The spontaneity and the chemisorptive nature of arsenate adsorption was confirmed by enthalpy, entropy, and activation energy. Comparison of adsorbents in the literature with the current study indicates that MgO-IBC composite has better adsorption capacity for arsenate adsorption than several previously explored adsorbents. (4) Conclusions: The higher adsorption capacity of MgO-IBC confirms its suitability and efficient utilization for the removal of arsenate from water.
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Cao W, Ren Y, Dong Q, Li Z, Xiao S. Enrichment of High Arsenic Groundwater Controlled by Hydrogeochemical and Physical Processes in the Hetao Basin, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:13489. [PMID: 36294070 PMCID: PMC9658607 DOI: 10.3390/ijerph192013489] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/14/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
Based on 447 samples collected from a shallow aquifer (depths from 0 to 150 m) in the Hetao Basin, Northern China, an integrated hydrogeochemical approach was used in this study to conceptualize the enrichment of high arsenic groundwater in the Hetao Basin. An unconventional method of distinguishing hydrogeochemical and physical processes from a dataset was tested by investigating the cumulative frequency distribution of ionic ratios expressed on a probability scale. By applying cumulative frequency distribution curves to characterize the distribution of ionic ratios throughout the Hetao Basin, hydrogeochemical indicators were obtained that distinguish the series of hydrogeochemical processes that govern groundwater composition. All hydrogeochemical processes can basically be classified as recharge intensity of groundwater, evaporation concentration intensity, and reductive degree controlling the spatial distribution of arsenic. By considering the three processes, we found that the concentration of arsenic was more than 10 μg/L when the (HCO3-+CO32-)/SO42- ratio was over 4.1 (strong reductive area). As the evaporation concentration intensity increased, the median value of arsenic increased from 10.74 to 382.7 μg/L in the median reductive area and rapidly increased from 89.11 to 461.45 μg/L in the strong reductive area. As the river recharge intensity increased (with the intensity index increasing from 0 to 5), the median value of arsenic dropped from 40.2 to 6.8 μg/L in the median reductive area and decreased more markedly from 219.85 to 23.73 μg/L in the strong reductive area. The results provide a new insight into the mechanism of As enrichment in groundwater.
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Affiliation(s)
- Wengeng Cao
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Sciences and Engineering, Ministry of Natural Resources, Shijiazhuang 050061, China
- Hebei Cangzhou Groundwater and Land Subsidence National Observation and Research Station, Shijiazhuang 050061, China
| | - Yu Ren
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Sciences and Engineering, Ministry of Natural Resources, Shijiazhuang 050061, China
- Hebei Cangzhou Groundwater and Land Subsidence National Observation and Research Station, Shijiazhuang 050061, China
| | - Qiuyao Dong
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
| | - Zeyan Li
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
- Key Laboratory of Groundwater Sciences and Engineering, Ministry of Natural Resources, Shijiazhuang 050061, China
- Hebei Cangzhou Groundwater and Land Subsidence National Observation and Research Station, Shijiazhuang 050061, China
| | - Shunyu Xiao
- College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
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Liu S, Liu H, Li J, Wang Y. Research Progress on Elements of Wild Edible Mushrooms. J Fungi (Basel) 2022; 8:jof8090964. [PMID: 36135689 PMCID: PMC9505289 DOI: 10.3390/jof8090964] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/09/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
Wild edible mushrooms are distributed all over the world and are delicious seasonal foods, rich in polysaccharides, amino acids, vitamins, and other components. At the same time, they contain many essential trace elements and are highly enriched in heavy metals (compared to green plants and cultivated edible mushrooms). Consumers may be exposed to health risks due to excessive heavy metals in the process of consumption. This is also one of the important factors affecting the import and export of edible mushrooms, which is of great concern to consumers and entry and exit inspection and quarantine departments. In this paper, the contents of four essential trace elements of iron, manganese, zinc, and copper and four harmful heavy metals of cadmium, lead, mercury, and arsenic in nearly 400 species of wild edible mushrooms from 10 countries are reviewed. It was found that the factors affecting the elemental content of edible mushrooms are mainly divided into internal and external factors. Internal is mainly the difference in species element-enrichment ability, and external is mainly environmental pollution and geochemical factors. The aim is to provide a reference for the risk assessment of edible mushrooms and their elemental distribution characteristics.
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Affiliation(s)
- Shuai Liu
- College of Resources and Environmental, Yunnan Agricultural University, Kunming 650201, China
- Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming 650223, China
| | - Honggao Liu
- School of Agronomy and Life Sciences, Zhaotong University, Zhaotong 657000, China
| | - Jieqing Li
- College of Resources and Environmental, Yunnan Agricultural University, Kunming 650201, China
- Correspondence: (J.L.); (Y.W.); Tel.: +86-13-700-615-526 (J.L.); +86-87-165-033-575 (Y.W.)
| | - Yuanzhong Wang
- Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming 650223, China
- Correspondence: (J.L.); (Y.W.); Tel.: +86-13-700-615-526 (J.L.); +86-87-165-033-575 (Y.W.)
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Shi LD, Zhou YJ, Tang XJ, Kappler A, Chistoserdova L, Zhu LZ, Zhao HP. Coupled Aerobic Methane Oxidation and Arsenate Reduction Contributes to Soil-Arsenic Mobilization in Agricultural Fields. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:11845-11856. [PMID: 35920083 DOI: 10.1021/acs.est.2c01878] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Microbial oxidation of organic compounds can promote arsenic release by reducing soil-associated arsenate to the more mobile form arsenite. While anaerobic oxidation of methane has been demonstrated to reduce arsenate, it remains elusive whether and to what extent aerobic methane oxidation (aeMO) can contribute to reductive arsenic mobilization. To fill this knowledge gap, we performed incubations of both microbial laboratory cultures and soil samples from arsenic-contaminated agricultural fields in China. Incubations with laboratory cultures showed that aeMO could couple to arsenate reduction, wherein the former bioprocess was carried out by aerobic methanotrophs and the latter by a non-methanotrophic bacterium belonging to a novel and uncultivated representative of Burkholderiaceae. Metagenomic analyses combined with metabolite measurements suggested that formate served as the interspecies electron carrier linking aeMO to arsenate reduction. Such coupled bioprocesses also take place in the real world, supported by a similar stoichiometry and gene activity in the incubations with natural paddy soils, and contribute up to 76.2% of soil-arsenic mobilization into pore waters in the top layer of the soils where oxygen was present. Overall, this study reveals a previously overlooked yet significant contribution of aeMO to reductive arsenic mobilization.
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Affiliation(s)
- Ling-Dong Shi
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yu-Jie Zhou
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xian-Jin Tang
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Andreas Kappler
- Center for Applied Geosciences, University of Tübingen, Tübingen 72074, Germany
| | - Ludmila Chistoserdova
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195-0005, United States
| | - Li-Zhong Zhu
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - He-Ping Zhao
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
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Podgorski J, Araya D, Berg M. Geogenic manganese and iron in groundwater of Southeast Asia and Bangladesh - Machine learning spatial prediction modeling and comparison with arsenic. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155131. [PMID: 35405246 DOI: 10.1016/j.scitotenv.2022.155131] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 03/25/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Naturally occurring, geogenic manganese (Mn) and iron (Fe) are frequently found dissolved in groundwater at concentrations that make the water difficult to use (deposits, unpleasant taste) or, in the case of Mn, a potential health hazard. Over 6000 groundwater measurements of Mn and Fe in Southeast Asia and Bangladesh were assembled and statistically examined with other physicochemical parameters. The machine learning methods random forest and generalized boosted regression modeling were used with spatially continuous environmental parameters (climate, geology, soil, topography) to model and map the probability of groundwater Mn > 400 μg/L and Fe > 0.3 mg/L for Southeast Asia and Bangladesh. The modeling indicated that drier climatic conditions are associated with a tendency of elevated Mn concentrations, whereas high Fe concentrations tend to be found in a more humid climate with elevated levels of soil organic carbon. The spatial distribution of Mn > 400 μg/L and Fe > 0.3 mg/L was compared and contrasted with that of the critical geogenic contaminant arsenic (As), confirming that high Fe concentrations are often associated with high As concentrations, whereas areas of high concentrations of Mn and As are frequently found adjacent to each other. The probability maps draw attention to areas prone to elevated concentrations of geogenic Mn and Fe in groundwater and can help direct efforts to mitigate their negative effects. The greatest Mn hazard is found in densely populated northwest Bangladesh and the Mekong, Red and Ma River Deltas of Cambodia and Vietnam. Widespread elevated Fe concentrations and their associated negative effects on water infrastructure pose challenges to water supply. The Mn and Fe prediction maps demonstrate the value of machine learning for the geospatial prediction modeling and mapping of groundwater contaminants as well as the potential for further constituents to be targeted by this novel approach.
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Affiliation(s)
- Joel Podgorski
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department Water Resources and Drinking Water, 8600 Dübendorf, Switzerland.
| | - Dahyann Araya
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department Water Resources and Drinking Water, 8600 Dübendorf, Switzerland
| | - Michael Berg
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department Water Resources and Drinking Water, 8600 Dübendorf, Switzerland
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Silica- Iron Oxide Nanocomposite Enhanced with Porogen Agent Used for Arsenic Removal. MATERIALS 2022; 15:ma15155366. [PMID: 35955299 PMCID: PMC9369727 DOI: 10.3390/ma15155366] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/26/2022] [Accepted: 07/28/2022] [Indexed: 11/18/2022]
Abstract
This study aims to remove arsenic from an aqueous medium by adsorption on a nanocomposite material obtained by the sol–gel method starting from matrices of silica, iron oxide and NaF (SiO2/Fe(acac)3/NaF). Initially, the study focused on the synthesis and characterization of the material by physico–chemical methods such as: X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, atomic force microscopy, and magnetization. Textural properties were obtained using nitrogen adsorption/desorption measurements. The zero load point, pHpZc, was also determined by the method of bringing the studied system into equilibrium. In addition, this study also provides a comprehensive discussion of the mechanism of arsenic adsorption by conducting kinetic, thermodynamic and equilibrium studies. Studies have been performed to determine the effects of adsorbent dose, pH and initial concentration of arsenic solution, material/arsenic contact time and temperature on adsorption capacity and material efficiency. Three theoretical adsorption isotherms were used, namely Langmuir, Freundlich and Sips, to describe the experimental results. The Sips isotherm was found to best describe the experimental data obtained, the maximum adsorption capacity being ~575 µg As(III)/g. The adsorption process was best described by pseudo-second order kinetics. Studies have been performed at different pH values to establish not only the optimal pH at which the adsorption capacity is maximum, but also which is the predominantly adsorbed species. The effect of pH and desorption studies have shown that ion exchange and the physiosorption mechanism are implicated in the adsorption process. From a thermodynamic point of view, parameters such as ΔG°, ΔH° and ΔS° were evaluated to establish the mechanism of the adsorption process. Desorption studies have been performed to determine the efficiency of the material and it has been shown that the material can be used successfully to treat a real-world example of deep water with a high arsenic content.
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Rakib MA, Quraishi SB, Newaz MA, Sultana J, Bodrud-Doza M, Rahman MA, Patwary MA, Bhuiyan MAH. Groundwater quality and human health risk assessment in selected coastal and floodplain areas of Bangladesh. JOURNAL OF CONTAMINANT HYDROLOGY 2022; 249:104041. [PMID: 35759889 DOI: 10.1016/j.jconhyd.2022.104041] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 06/08/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
Groundwater aquifers are a common source of drinking water in Bangladesh. However, groundwater contamination is a major public health concern across the country. This research aims to examine the groundwater quality and health concerns using a random sampling process. Multivariate statistical and health risk analyses of elements were performed to determine the source of contaminants and their effects on human health. A total of 24 parameters were analyzed, where Na+, NH4+, K+, Mg2+, F-, NO3-, Mn, Fe, Se, U, and As concentrations were found to be high in different sampling points compared to the Department of Environment of Bangladesh (DoE), and the World Health Organization (WHO) groundwater quality standards. Principal Component Analysis (PCA) and Cluster Analysis (CA) identified the dominant and potential sources of contaminants in the groundwater aquifer, including geogenic, salinity intrusion, industrial, and agricultural. The results of the degree of contamination level (Cd) and the heavy metal pollution index (HPI) showed that 28% and 12% of the sampling points had high levels of heavy metal contamination, indicating a high risk for human health issues. Cr concentrations were found to have a higher carcinogenic (cancer) risk than As and Cd concentrations. Hazard quotient (HQ) and hazard index (HI) scores expressed the hazardous status and possible chronic effects in the context of individual sampling points. For both child and adults, 44% and 36% of the sampling points had a high HI score, indicating the possibility of long-term health risks for local populations.
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Affiliation(s)
- M A Rakib
- Department of Disaster Management, Begum Rokeya University, Rangpur, Bangladesh; Graduate Program in Sustainability Science-Global Leadership Initiatives, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8563, Japan.
| | - Shamshad B Quraishi
- Analytical Chemistry Laboratory, Chemistry Division, Atomic Energy Center, Dhaka 1000, Bangladesh
| | - Md Asif Newaz
- Environmental Science Discipline, Khulna University, Khulna 9208, Bangladesh
| | - Jolly Sultana
- Department of Physics, Khulna University of Engineering and Technology, Khulna, Bangladesh
| | - Md Bodrud-Doza
- Climate Change Programme (CCP), BRAC, Dhaka 1212, Bangladesh
| | - Md Atiur Rahman
- Department of Geography and Environmental Science, Begum Rokeya University, Rangpur, Bangladesh
| | - Masum A Patwary
- Environmental Science and Disaster Management, Daffodil International University, Dhaka, Bangladesh
| | - Mohammad A H Bhuiyan
- Department of Environmental Sciences, Jahangirnagar University, Dhaka 1342, Bangladesh
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31
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Richards LA, Kumari R, Parashar N, Kumar A, Lu C, Wilson G, Lapworth D, Niasar VJ, Ghosh A, Chakravorty B, Krause S, Polya DA, Gooddy DC. Environmental tracers and groundwater residence time indicators reveal controls of arsenic accumulation rates beneath a rapidly developing urban area in Patna, India. JOURNAL OF CONTAMINANT HYDROLOGY 2022; 249:104043. [PMID: 35767908 DOI: 10.1016/j.jconhyd.2022.104043] [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: 05/21/2022] [Accepted: 06/12/2022] [Indexed: 06/15/2023]
Abstract
Groundwater security is a pressing environmental and societal issue, particularly due to significantly increasing stressors on water resources, including rapid urbanization and climate change. Groundwater arsenic is a major water security and public health challenge impacting millions of people in the Gangetic Basin of India and elsewhere globally. In the rapidly developing city of Patna (Bihar) in northern India, we have studied the evolution of groundwater chemistry under the city following a three-dimensional sampling framework of multi-depth wells spanning the central urban zone in close proximity to the River Ganges (Ganga) and transition into peri-urban and rural areas outside city boundaries and further away from the river. Using inorganic geochemical tracers (including arsenic, iron, manganese, nitrate, nitrite, ammonium, sulfate, sulfide and others) and residence time indicators (CFCs and SF6), we have evaluated the dominant hydrogeochemical processes occurring and spatial patterns in redox conditions across the study area. The distribution of arsenic and other redox-sensitive parameters is spatially heterogenous, and elevated arsenic in some locations is consistent with arsenic mobilization via reductive dissolution of iron hydroxides. Residence time indicators evidence modern (<~60-70 years) groundwater and suggest important vertical and lateral flow controls across the study area, including an apparent seasonal reversal in flow regimes near the urban center. An overall arsenic accumulation rate is estimated to be ~0.003 ± 0.003 μM.yr-1 (equivalent to ~0.3 ± 0.2 μg.yr-1), based on an average of CFC-11, CFC-12 and SF6-derived models, with the highest rates of arsenic accumulation observed in shallow, near-river groundwaters also exhibiting elevated concentrations of nutrients including ammonium. Our findings have implications on groundwater management in Patna and other rapidly developing cities, including potential future increased groundwater vulnerability associated with surface-derived ingress from large-scale urban abstraction or in higher permeability zones of river-groundwater connectivity.
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Affiliation(s)
- Laura A Richards
- Department of Earth and Environmental Sciences, Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester M13 9PL, UK.
| | - Rupa Kumari
- Mahavir Cancer Sansthan and Research Center, Phulwarisharif, Patna 801505, Bihar, India
| | - Neha Parashar
- Mahavir Cancer Sansthan and Research Center, Phulwarisharif, Patna 801505, Bihar, India; now at Indian Institute of Technology Patna, Patna 801106, Bihar, India
| | - Arun Kumar
- Mahavir Cancer Sansthan and Research Center, Phulwarisharif, Patna 801505, Bihar, India
| | - Chuanhe Lu
- Department of Earth and Environmental Sciences, Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester M13 9PL, UK
| | - George Wilson
- Department of Earth and Environmental Sciences, Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester M13 9PL, UK
| | - Dan Lapworth
- British Geological Survey, Maclean Building, Wallingford, Oxfordshire OX10 8BB, UK
| | - Vahid J Niasar
- Department of Chemical Engineering, The University of Manchester, Manchester M13 9PL, UK
| | - Ashok Ghosh
- Mahavir Cancer Sansthan and Research Center, Phulwarisharif, Patna 801505, Bihar, India
| | | | - Stefan Krause
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - David A Polya
- Department of Earth and Environmental Sciences, Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester M13 9PL, UK
| | - Daren C Gooddy
- British Geological Survey, Maclean Building, Wallingford, Oxfordshire OX10 8BB, UK
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Gyawali T, Pant S, Nakamura K, Komai T, Paudel SR. Spatial and temporal distribution of arsenic contamination in groundwater of Nawalparasi-West, Nepal: an investigation with suggested countermeasures for South Asian Region. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:582. [PMID: 35831479 DOI: 10.1007/s10661-022-10276-5] [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: 12/18/2021] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
Nawalparasi-West/Parasi is one of the severely affected districts in the Terai lowlands of Nepal by arsenic (As) contamination in groundwater, exceeding standards of 10 ppb (WHO) and 50 ppb (Nepal Drinking Water Standard). This study presents the spatial and temporal distribution of As across 6 km × 10 km region in Parasi via meteorological, hydrogeological, physio-chemical, and sedimentological investigations in 31 communities for about 5 years. In this study, water balance analysis was carried out for understanding the groundwater dynamics in the study area and its contribution to As elution. Gentle flow gradient and little to no infiltration was observed in the central region with relatively impervious silty clayey flood plain, where higher As concentrations were obtained compared to the northern Siwalik foothills and southern parts with coarser sediments. Similarly, higher As concentration (1048 ppb) was recorded in the drier pre-monsoon season than the wet season (529 ppb). The aquifer at 12 to 23 m depth feeding 73% wells in the study area exhibited higher As concentration in reduced environment as opposed to the oxidizing state at 5- to 6-m and 30- to 50-m deep aquifers. Other constituents such as Fe, B, and Cr and their relation with As were analyzed. The results of GERAS model analysis done for health risk assessment are also presented which show that under long-term exposure, the residents in Parasi were undertaking intolerable cancer risk of 1.1 to 6.4 × 10-3. This study further incorporates socio-economic sentiments vital to analyze, and propose sustainable and cheap countermeasures for immediate implementation to reduce As exposure and health risk in Nepal, which is also highly applicable for other affected regions in South Asian Region.
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Affiliation(s)
- Tunisha Gyawali
- Department of Civil Engineering, Institute of Engineering, Pulchowk Campus, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal
| | - Susmita Pant
- Department of Civil Engineering, Institute of Engineering, Pulchowk Campus, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal
| | - Keizo Nakamura
- Institute of Environmental Studies, Keiai University, Chiba, Japan
| | - Takeshi Komai
- Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
| | - Shukra Raj Paudel
- Department of Civil Engineering, Institute of Engineering, Pulchowk Campus, Tribhuvan University, Pulchowk, Lalitpur, 44700, Nepal.
- Department of Environmental Engineering, College of Science and Technology, Korea University, Sejong, Republic of Korea.
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Choppala G, Lamb D, Aughterson R, Burton ED. Tooeleite Transformation and Coupled As(III) Mobilization Are Induced by Fe(II) under Anoxic, Circumneutral Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:9446-9452. [PMID: 35733356 PMCID: PMC9667501 DOI: 10.1021/acs.est.2c02130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Tooeleite [FeIII6(AsIIIO3)4SO4(OH)4.4H2O] is an important As(III) host phase in diverse mining-impacted environments. Tooeleite has also received attention as a target phase for immobilizing As(III) in environmental and engineered settings. However, little is known regarding tooeleite's environmental stability, with no previous research examining the possible role of Fe(II) in inducing tooeleite transformation (as occurs for Fe(III) oxide minerals). We investigated shifts in solid-phase Fe and As speciation and associated As mobilization into the aqueous phase during exposure of tooeleite to aqueous Fe(II) under anoxic conditions at pH 4 to 8. Our results demonstrate that environmentally relevant concentrations of aqueous Fe(II) (i.e., 1 to 10 mM) induce significant mobilization of As(III) from tooeleite under near-neutral pH conditions, with greater As(III) mobilization occurring at higher pH. Extended X-ray absorption fine structure spectroscopy at both the As and Fe K-edge reveals that the observed As(III) mobilization was coupled with partial Fe(II)-induced transformation of tooeleite to As(III)-bearing ferrihydrite at pH 6 to 8. These results provide new insights into the environmental stability of tooeleite and demonstrate a novel pathway for As(III) mobilization in tooeleite-bearing systems.
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Affiliation(s)
- Girish Choppala
- Global
Centre for Environmental Remediation (GCER), The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Dane Lamb
- Chemical
and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Robert Aughterson
- Institute
of Materials Engineering, Australian Nuclear
Science and Technology Organization (ANSTO), Lucas Heights, Sydney, New South Wales 2234, Australia
| | - Edward D. Burton
- Faculty
of Science and Engineering, Southern Cross
University, Lismore, New South Wales 2480, Australia
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34
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Zhang X, Zhao R, Wu X, Mu W, Wu C. Delineating the controlling mechanisms of arsenic release into groundwater and its associated health risks in the Southern Loess Plateau, China. WATER RESEARCH 2022; 219:118530. [PMID: 35533622 DOI: 10.1016/j.watres.2022.118530] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 06/14/2023]
Abstract
The mechanisms controlling arsenic (As) enrichment and mobilization associated with human health risk assessment of groundwater in the Longdong Basin, located in the southern part of the Loess Plateau, China, have been yet unexplained. This uncertainty is partly attributed to a poor understanding of groundwater arsenic management. To address this problem, this study investigated the occurrence and spatial distribution of As in unconfined groundwater (UG) and confined groundwater (CG) in the study area, integrated Self-Organizing Maps (SOM) and geochemical modeling to elucidate the mechanisms controlling As release and mobilization in groundwater, and conducted a health risk assessment of groundwater As. The results showed that 13.6% of UG samples (n = 66) and 22.4% of CG samples (n = 98) exceeded the WHO guideline limit of As (10 μg/L). The detailed hydrogeochemical studies showed that As-enrichment groundwater is dominated by Cl-Na type, and Gaillardet diagram indicated that evaporites weathering may contribute to As mobilization in CG. The SOM analysis combined with Spearman's correlation coefficient quantified the negative correlation between As and redox potential, dissolved oxygen, SO42-, NO3-, and the positive correlation between As and HCO3-, Mn in UG. In CG, As is positively correlated to pH and negatively to electrical conductivity, SO42-, Fe and Mn. The saturation indices of the mineral phases indicates an insignificant relationship between As and Fe. We conclude that under oxidizing conditions, evaporative controls and the desorption of Fe-oxides under alkaline and high salinity conditions are the dominant mechanisms controlling As release and mobilization in groundwater. In addition, exposure to groundwater As through drinking water posed potential risk of carcinogenic and non-carcinogenic effects on children and adults. This study contributes to groundwater As management and sustainable safe groundwater supply.
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Affiliation(s)
- Xiao Zhang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Rong Zhao
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Xiong Wu
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Wenping Mu
- School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
| | - Chu Wu
- Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100083, China
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35
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Numerical Modeling and Simulation of the Effectiveness of Groundwater Source Protection Management Plans: Riverbank Filtration Case Study in Serbia. WATER 2022. [DOI: 10.3390/w14131993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The paper describes the establishment and testing of an algorithm for developing sustainable management plans associated with groundwater source protection against potential pollutants and discusses the effectiveness of individual systems. The applied methodology pertains to groundwater resource management, particularly those cases that involve riverbank filtration. Namely, groundwater (numerical) modeling is employed to examine the groundwater regime and balance, as well as to create protection systems and illustrate their effectiveness. Particle tracking analysis is used to study pollutants’ travel and residence time. On the other hand, PEST with regularization is employed to estimate the numerical model parameters. The proposed method is used in a real case study, which examines the application of the developed algorithm to the protection of a drinking water supply source from an industrial zone, which is a potential source of pollution. The research presented in the paper opens new avenues for future studies involving mathematical multicriteria optimization and decision making about optimal groundwater source protection management plans.
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Aljubran MA, Ali Z, Wang Y, Alonso E, Puspasari T, Cherviakouski K, Pinnau I. Highly efficient size-sieving-based removal of arsenic(III) via defect-free interfacially-polymerized polyamide thin-film composite membranes. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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37
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Vences-Alvarez E, Chazaro-Ruiz LF, Rangel-Mendez JR. New bimetallic adsorbent material based on cerium-iron nanoparticles highly selective and affine for arsenic(V). CHEMOSPHERE 2022; 297:134177. [PMID: 35245593 DOI: 10.1016/j.chemosphere.2022.134177] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 01/14/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Bimetallic oxy(hydroxides) have gain great interest in water treatment systems based on adsorption processes. Their high OH groups density, in addition to inheriting the oxides properties make them highly promising adsorbents of anions. In this work, highly affine and selective bimetallic oxyhydroxides of cerium and iron (Ce:Fe-P's) for arsenic(V) were synthesized by implementing an assisted microwave methodology. The Ce:Fe-P's were characterized by various techniques (SEM, FTIR, XRD and XPS) and the As(V) adsorption capacity and kinetics as well as the effect of pH and the presence of coexisting anions were determined. The results showed that Ce:Fe-P's have an outstanding As(V) adsorption capacity (179.8 mg g-1 at Ce = 3 mg L-1) even at low concentrations (120 mg g-1 at Ce = 37 μg L-1). Moreover, the adsorption equilibrium was reached very fast, just in 3 min, with an adsorption rate of 0.123 mg min-1, that is, 80% of the initial As(V) concentration of 5 mg L-1 was removed in the first 3 min. The arsenic adsorption capacity decreased only up to 20% at pH above 7, attributed to electrostatic repulsions due to the adsorbent's pHPZC, which was 6.8. On the other hand, the arsenic adsorption capacity of Ce:Fe-P's decreased just 21% in the presence of 10 mg L-1 of each of the following competing anions: F-, Cl-, SO42-, NO3-, PO43- and CO32-, which usually coincide in contaminated water with As(V). Ce:Fe-P's has proven to be one of the most promising As(V) adsorbent materials reported so far in the literature, because it presented an outstanding adsorption capacity and at the same time a very fast adsorption speed. Furthermore, the pH and the concentration of coexisting anions caused little interference in the adsorption processes. Due to the above, the Ce:Fe-P's is already in the process of intellectual protection.
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Affiliation(s)
- Esmeralda Vences-Alvarez
- Environmental Sciences Division, Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, S.L.P., 78216, Mexico
| | - Luis F Chazaro-Ruiz
- Environmental Sciences Division, Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, S.L.P., 78216, Mexico
| | - J Rene Rangel-Mendez
- Environmental Sciences Division, Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, S.L.P., 78216, Mexico.
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38
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Zhu C, Xue C, Huang M, Zhu F, Fang G, Wang D, Liu S, Chen N, Wu S, Zhou D. Rapid As(III) oxidation mediated by activated carbons: Reactive species vs. direct oxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 822:153536. [PMID: 35104530 DOI: 10.1016/j.scitotenv.2022.153536] [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: 12/04/2021] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
Activated carbon (AC) is widely used in pollutant removal, due to its adsorption capacity, conductivity and catalytic performance. However, few studies focus on the redox activity of AC and its role in pollutant transformation. In this study, we found that AC could efficiently mediate the oxidation of As(III) and the process of As(III) oxidation was pH and oxygen concentration dependent. In general, the presence of O2 promoted As(III) oxidation at pH 3.0-9.5. Acidic and alkaline conditions favored As(III) oxidation regardless of whether there was oxygen, but the mechanisms involved were quite different when there was oxygen. At pH 3.0, reactive species (H2O2 and ·OH) were generated and accounted for As(III) oxidation; at pH 9.5, As(III) was directly oxidized by O2 (electron transfer from As(III) to O2 mediated by carbon matrix) under aerobic conditions. Pre-oxidation and cyclic experiments results indicated the ability of AC to oxidize As(III) at pH 9.5 was sustainable and recyclable. This study provided a new insight in pollutant oxidation by AC in the environment.
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Affiliation(s)
- Changyin Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Chenyan Xue
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Mingquan Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Fengxiao Zhu
- School of Environment, Nanjing Normal University, Nanjing 210023, PR China
| | - Guodong Fang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Dixiang Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Shaochong Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Ning Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Song Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Dongmei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
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Lightfoot AK, Brennwald MS, Prommer H, Stopelli E, Berg M, Glodowska M, Schneider M, Kipfer R. Noble gas constraints on the fate of arsenic in groundwater. WATER RESEARCH 2022; 214:118199. [PMID: 35220067 DOI: 10.1016/j.watres.2022.118199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 02/10/2022] [Accepted: 02/13/2022] [Indexed: 06/14/2023]
Abstract
Groundwater contamination of geogenic arsenic (As) remains a global health threat, particularly in south-east Asia. The prominent correlation often observed between high As concentrations and methane (CH4) stimulated the analysis of the gas dynamics in an As contaminated aquifer, whereby noble and reactive gases were analysed. Results show a progressive depletion of atmospheric gases (Ar, Kr and N2) alongside highly increasing CH4, implying that a free gas phase comprised mainly of CH4 is formed within the aquifer. In contrast, Helium (He) concentrations are high within the CH4 (gas) producing zone, suggesting longer (groundwater) residence times. We hypothesized that the observed free (CH4) gas phase severely detracts local groundwater (flow) and significantly reduces water renewal within the gas producing zone. Results are in-line with this hypothesis, however, a second hypothesis has been developed, which focuses on the potential transport of He from an adjacent aquitard into the (CH4) gas producing zone. This second hypothesis was formulated as it resolves the particularly high He concentrations observed, and since external solute input from the overlying heterogeneous aquitard cannot be excluded. The proposed feedback between the gas phase and hydraulics provides a plausible explanation of the anti-intuitive correlation between high As and CH4, and the spatially highly patchy distribution of dissolved As concentrations in contaminated aquifers. Furthermore, the increased groundwater residence time would allow for the dissolution of more crystalline As-hosting iron(Fe)-oxide phases in conjunction with the formation of more stable secondary Fe minerals in the hydraulically-slowed (i.e., gas producing) zone; a subject which calls for further investigation.
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Affiliation(s)
- Alexandra K Lightfoot
- Department of Water Resources and Drinking Water, Eawag, Dübendorf 8600, Switzerland.
| | - Matthias S Brennwald
- Department of Water Resources and Drinking Water, Eawag, Dübendorf 8600, Switzerland.
| | - Henning Prommer
- CSIRO Land and Water, Floreat, WA 6014, Australia; Department of Earth Sciences, University of Western Australia, Crawley, WA 6009, Australia.
| | - Emiliano Stopelli
- Department of Water Resources and Drinking Water, Eawag, Dübendorf 8600, Switzerland; International Services and Projects, Nagra, Wettingen 5430, Switzerland.
| | - Michael Berg
- Department of Water Resources and Drinking Water, Eawag, Dübendorf 8600, Switzerland.
| | - Martyna Glodowska
- Department of Microbiology, Institute for Water and Wetland Research, Radboud University, XZ Nijmegen 6525, The Netherlands.
| | - Magnus Schneider
- Institute of Applied Geosciences, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany
| | - Rolf Kipfer
- Department of Water Resources and Drinking Water, Eawag, Dübendorf 8600, Switzerland; Department of Environmental System Sciences, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich 8092, Switzerland; Department of Earth Sciences, Institute of Geochemistry and Petrology, ETH Zürich, Zürich 8092, Switzerland.
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Nguyen TH, Tran HN, Nguyen TV, Vigneswaran S, Trinh VT, Nguyen TD, Ha Nguyen TH, Mai TN, Chao HP. Single-step removal of arsenite ions from water through oxidation-coupled adsorption using Mn/Mg/Fe layered double hydroxide as catalyst and adsorbent. CHEMOSPHERE 2022; 295:133370. [PMID: 34973248 DOI: 10.1016/j.chemosphere.2021.133370] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 12/12/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
This study developed a layered double hydroxides (Mn/Mg/Fe-LDH) material through a simple co-precipitation method. The Mn/Mg/Fe-LDH oxidized arsenite [As(III)] ions into arsenate [As(V)] anions. The As(III) and oxidized As(V) were then adsorbed onto Mn/Mg/Fe-LDH. The adsorption process of arseniate [As(V)] oxyanions by Mn/Mg/Fe-LDH was simultaneously conducted for comparison. Characterization results indicated that (i) the best Mg/Mn/Fe molar ratio was 1/1/1, (ii) Mn/Mg/Fe-LDH structure was similar to that of hydrotalcite, (iii) Mn/Mg/Fe-LDH possessed a positively charged surface (pHIEP of 10.15) and low Brunauer-Emmett-Teller surface area (SBET = 75.2 m2/g), and (iv) Fe2+/Fe3+ and Mn2+/Mn3+/Mn4+ coexisted in Mn/Mg/Fe-LDH. The As(III) adsorption process by Mn/Mg/Fe-LDH was similar to that of As(V) under different experimental conditions (initial solutions pH, coexisting foreign anions, contact times, initial As concentrations, temperatures, and desorbing agents). The Langmuir maximum adsorption capacity of Mn/Mg/Fe-LDH to As(III) (56.1 mg/g) was higher than that of As(V) (32.2 mg/g) at pH 7.0 and 25 °C. X-ray photoelectron spectroscopy was applied to identify the oxidation states of As in laden Mn/Mg/Fe-LDH. The key removal mechanism of As(III) by Mn/Mg/Fe-LDH was oxidation-coupled adsorption, and that of As(V) was reduction-coupled adsorption. The As(V) mechanism adsorption mainly involved: (1) the inner-sphere and outer-sphere complexation with OH groups of Mn/Mg/Fe-LDH and (2) anion exchange with host anions (NO3-) in its interlayer. The primary mechanism adsorption of As(III) was the inner-sphere complexation. The redox reactions made Mn/Mg/Fe-LDH lose its original layer structure after adsorbing As(V) or As(III). The adsorption process was highly irreversible. Mn/Mg/Fe-LDH can decontaminate As from real groundwater samples from 45-92 ppb to 0.35-7.9 ppb (using 1.0 g/L). Therefore, Mn/Mg/Fe-LDH has great potential as a material for removing As.
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Affiliation(s)
- Thi Hai Nguyen
- Faculty of Engineering and IT, University of Technology Sydney (UTS), Sydney, Australia
| | - Hai Nguyen Tran
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh, 700000, Viet Nam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang, 550000, Viet Nam.
| | - Tien Vinh Nguyen
- Faculty of Engineering and IT, University of Technology Sydney (UTS), Sydney, Australia.
| | | | - Van Tuyen Trinh
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
| | - Thanh Dong Nguyen
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
| | | | - Trong Nhuan Mai
- VNU University of Science, Vietnam National University, Hanoi, Viet Nam
| | - Huan-Ping Chao
- Department of Environmental Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan, 32023, Taiwan
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Kaplan DI, Nichols R, Xu C, Lin P, Yeager C, Santschi PH. Large seasonal fluctuations of groundwater radioiodine speciation and concentrations in a riparian wetland in South Carolina. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151548. [PMID: 34780820 DOI: 10.1016/j.scitotenv.2021.151548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 10/15/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
Recent studies evaluating multiple years of groundwater radioiodine (129I) concentration in a riparian wetland located in South Carolina, USA identified strong seasonal concentration fluctuations, such that summer concentrations were much greater than winter concentrations. These fluctuations were observed only in the wetlands but not in the upland portion of the plume and only with 129I, and not with other contaminants of anthropogenic origin: nitrate/nitrite, strontium-90, technecium-99, tritium, or uranium. This unexplained observation was hypothesized to be the result of strongly coupled processes involving hydrology, water temperature, microbiology, and chemistry. To test this hypothesis, an extensive historical groundwater database was evaluated, and additional measurements of total iodine and iodine speciation were made from recently collected samples. During the summer, the water table decreased by as much as 0.7 m, surface water temperature increased by as much as 15 °C, and total iodine concentrations were consistently greater (up to 680%) than the following winter months. Most of the additional iodine observed in the summer could be attributed to proportional gains in organo-iodine, and not iodide or iodate. Furthermore, 129I concentrations were observed to be two-orders-of-magnitude greater at the bottom of the upland aquifer than at the top. A coupled hydrological and biogeochemical conceptual model is proposed to tie these observations together. First, as the surface water temperature increased during the summer, microbial activity was enhanced, which in turn stimulated the formation of mobile organo-I. Hydrological processes were also likely involved in the observed iodine seasonal changes: (1) as the water table decreased in summer, the remaining upland water entering the wetland was comprised of a greater proportion of water containing elevated iodine concentrations from the low depths, and (2) water flow paths in summer changed such that the wells intercepted more of the contaminant plume and less of the diluting rainwater (due to evapotranspiration) and streamwater (as the lower levels promote a predominantly recharging system). These results underscore the importance of coupled processes influencing contaminant concentrations, and the need to assess seasonal contaminant variations to optimize long-term monitoring programs of wetlands.
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Affiliation(s)
- Daniel I Kaplan
- Savannah River National Laboratory, Aiken, SC 29808, United States.
| | - Ralph Nichols
- Savannah River National Laboratory, Aiken, SC 29808, United States
| | - Chen Xu
- Department of Marine Sciences, Texas A&M University, Galveston, TX 77551, United States
| | - Peng Lin
- Department of Marine Sciences, Texas A&M University, Galveston, TX 77551, United States
| | - Chris Yeager
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States
| | - Peter H Santschi
- Department of Marine Sciences, Texas A&M University, Galveston, TX 77551, United States
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Kumar A, Rahman MS, Ali M, Salaun P, Gourain A, Kumar S, Kumar R, Niraj PK, Kumar M, Kumar D, Bishwapriya A, Singh S, Murti K, Dhingra S, Sakamoto M, Ghosh AK. Assessment of disease burden in the arsenic exposed population of Chapar village of Samastipur district, Bihar, India, and related mitigation initiative. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:27443-27459. [PMID: 34982385 DOI: 10.1007/s11356-021-18207-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Fast growing arsenic menace is causing serious health hazards in Bihar, India, with an estimated 10 million people at risk. The exposed population is often unaware of the problem, which only amplifies the burden of arsenic health effects. In the present study, we have assessed the current situation of arsenic exposure in Chapar village of Samastipur district, Bihar. The health of the inhabitants was assessed and correlated with (1) arsenic concentrations in the groundwater of individual wells and (2) arsenic concentration found in their hair and urine. Altogether, 113 inhabitants were assessed, and 113 hair, urine and groundwater samples were collected. The health study reveals that the exposure to arsenic has caused serious health hazard amongst the exposed population with pronounced skin manifestations, loss of appetite, anaemia, constipation, diarrhoea, general body weakness, raised blood pressure, breathlessness, diabetes, mental disabilities, diabetes, lumps in the body and few cancer incidences. It was found that 52% of the total collected groundwater samples had arsenic levels higher than the WHO limit of 10 µg/l (with a maximum arsenic concentration of 1212 µg/l) and the reduced arsenite was the predominant form in samples tested for speciation (N = 19). In the case of hair samples, 29% of the samples had arsenic concentrations higher than the permissible limit of 0.2 mg/kg, with a maximum arsenic concentration of 46 µg/l, while in 20% exposed population, there was significant arsenic contamination in urine samples > 50 µg/l. In Chapar village, the probability of carcinogenic-related risk in the exposed population consuming arsenic contaminated water is 100% for children, 99.1% for females and 97.3% for male subjects. The assessment report shared to the government enabled the village population to receive two arsenic filter units. These units are currently operational and catering 250 households providing arsenic-free water through piped water scheme. This study therefore identified a significant solution for this arsenic-exposed population.
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Affiliation(s)
- Arun Kumar
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India.
| | - Md Samiur Rahman
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
| | - Mohammad Ali
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
| | | | | | | | - Ranjit Kumar
- Central University of Himachal Pradesh, Kangra, HP, India
| | - Pintoo Kumar Niraj
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
| | - Mukesh Kumar
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
| | - Dhruv Kumar
- Amity Institute of Molecular Medicine & Stem Cell Research (AIMMSCR), Amity University Uttar Pradesh, Noida, India
| | | | | | - Krishna Murti
- National Institute of Pharmaceutical Education and Research (NIPER), Hajipur, Bihar, India
| | - Sameer Dhingra
- National Institute of Pharmaceutical Education and Research (NIPER), Hajipur, Bihar, India
| | | | - Ashok Kumar Ghosh
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
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Granular Natural Zeolites: Cost-Effective Adsorbents for the Removal of Ammonium from Drinking Water. WATER 2022. [DOI: 10.3390/w14060939] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Increasing food demand has resulted in an ever increasing demand for nitrogen fertilizers. Ammonium is the main constituent of these fertilizers and is a threat to aquatic environments around the world. With a focus on the treatment of drinking water, the scope of this study was to investigate the influence of key parameters on the suitability of granular natural zeolites as adsorbents for ammonium. Sorption experiments were performed in artificial matrices by varying the grain size, contact time, ammonium concentration, pH, content of competing ions, and regeneration solutions used. Additionally, natural matrices and the point of zero charge (pzc) were investigated. With an initial ammonium concentration of 10 mgN/L, the grain size was shown to have no significant effect on the sorption efficiency (97–98%). The experimental data obtained was best described by the Langmuir adsorption model (R2 = 0.99). Minor effects on sorption were observed at different pH values and in the presence of competing anions. In addition, the pHPZC was determined to be between pH 6.24 and pH 6.47. Potassium ions were shown to be better than sodium ions for the regeneration of previously loaded zeolites, potassium is also the main competitor to ammonium sorption. The use of tap, bank filtrate, river, and groundwater matrices decreased the ammonium sorption capacity of granular natural zeolites by up to 8%. Based on our results, granular natural zeolites are promising cost-effective adsorbents for drinking water treatment, especially in threshold and developing countries.
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Bacterial Arsenic Metabolism and Its Role in Arsenic Bioremediation. Curr Microbiol 2022; 79:131. [PMID: 35290506 DOI: 10.1007/s00284-022-02810-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 02/14/2022] [Indexed: 11/03/2022]
Abstract
Arsenic contaminations, often adversely influencing the living organisms, including plants, animals, and the microbial communities, are of grave apprehension. Many physical, chemical, and biological techniques are now being explored to minimize the adverse affects of arsenic toxicity. Bioremediation of arsenic species using arsenic loving bacteria has drawn much attention. Arsenate and arsenite are mostly uptaken by bacteria through aquaglycoporins and phosphate transporters. After entering arsenic inside bacterial cell arsenic get metabolized (e.g., reduction, oxidation, methylation, etc.) into different forms. Arsenite is sequentially methylated into monomethyl arsenic acid (MMA) and dimethyl arsenic acid (DMA), followed by a transformation of less toxic, volatile trimethyl arsenic acid (TMA). Passive remediation techniques, including adsorption, biomineralization, bioaccumulation, bioleaching, and so on are exploited by bacteria. Rhizospheric bacterial association with some specific plants enhances phytoextraction process. Arsenic-resistant rhizospheric bacteria have immense role in enhancement of crop plant growth and development, but their applications are not well studied till date. Emerging techniques like phytosuction separation (PS-S) have a promising future, but still light to be focused on these techniques. Plant-associated bioremediation processes like phytoextraction and phytosuction separation (PS-S) techniques might be modified by treating with potent bacteria for furtherance.
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Vengosh A, Coyte RM, Podgorski J, Johnson TM. A critical review on the occurrence and distribution of the uranium- and thorium-decay nuclides and their effect on the quality of groundwater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:151914. [PMID: 34856287 DOI: 10.1016/j.scitotenv.2021.151914] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 10/22/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
This critical review presents the key factors that control the occurrence of natural elements from the uranium- and thorium-decay series, also known as naturally occurring radioactive materials (NORM), including uranium, radium, radon, lead, polonium, and their isotopes in groundwater resources. Given their toxicity and radiation, elevated levels of these nuclides in drinking water pose human health risks, and therefore understanding the occurrence, sources, and factors that control the mobilization of these nuclides from aquifer rocks is critical for better groundwater management and human health protection. The concentrations of these nuclides in groundwater are a function of the groundwater residence time relative to the decay rates of the nuclides, as well as the net balance between nuclides mobilization (dissolution, desorption, recoil) and retention (adsorption, precipitation). This paper explores the factors that control this balance, including the relationships between the elemental chemistry (e.g., solubility and speciation), lithological and hydrogeological factors, groundwater geochemistry (e.g., redox state, pH, ionic strength, ion-pairs availability), and their combined effects and interactions. The various chemical properties of each of the nuclides results in different likelihoods for co-occurrence. For example, the primordial 238U, 222Rn, and, in cases of high colloid concentrations also 210Po, are all more likely to be found in oxic groundwater. In contrast, in reducing aquifers, Ra nuclides, 210Pb, and in absence of high colloid concentrations, 210Po, are more mobile and frequently occur in groundwater. In highly permeable sandstone aquifers that lack sufficient adsorption sites, Ra is often enriched, even in low salinity and oxic groundwater. This paper also highlights the isotope distributions, including those of relatively long-lived nuclides (238U/235U) with abundances that depend on geochemical conditions (e.g., fractionation induced from redox processes), as well as shorter-lived nuclides (234U/238U, 228Ra/226Ra, 224Ra/228Ra, 210Pb/222Rn, 210Po/210Pb) that are strongly influenced by physical (recoil), lithological, and geochemical factors. Special attention is paid in evaluating the ability to use these isotope variations to elucidate the sources of these nuclides in groundwater, mechanisms of their mobilization from the rock matrix (e.g., recoil, ion-exchange), and retention into secondary mineral phases and ion-exchange sites.
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Affiliation(s)
| | | | - Joel Podgorski
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
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46
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Song Z, Garg S, Ma J, Waite TD. Influence of cations on As(III) removal from simulated groundwaters by double potential step chronoamperometry (DPSC) employing polyvinylferrocene (PVF) functionalized electrodes. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127472. [PMID: 34655881 DOI: 10.1016/j.jhazmat.2021.127472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 09/28/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
As(III) removal from groundwaters is challenging because of its neutral charge and low surface affinity under circumneutral pH conditions. In this work, we investigate the influence of Ca2+ and Mg2+ on the removal of As(III) by a redox active polyvinylferrocene (PVF) functionalized electrode in a modified double potential step chronoamperometry (DPSC) setup. In the absence of divalent cations, nearly 90% As(III) removal is achieved over ten continuous cycles by single-pass DPSC, even in the presence of competing anions, however the presence of divalent cations at concentrations ≥ 1.25 mM significantly inhibits As(III) removal. The divalent cations enhance arsenic removal in the first (removal) step but suppress electrode regeneration in the 2nd step. Our results suggest that Ca2+/Mg2+ either acts as a bridge between the electrode surface and As anions or the sorption of Ca2+/Mg2+ increases the positive charge on the electrode surface thereby facilitating As(V) sorption. We show that effective electrode regeneration can be achieved using an NaOH wash however the overall complexity of the process increases. Overall, we conclude that the influence of divalent cations on As removal by electro-sorption processes needs to be taken into consideration for application of this technology for real groundwater treatment.
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Affiliation(s)
- Zhao Song
- UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
| | - Shikha Garg
- UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
| | - Jinxing Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - T David Waite
- UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
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Rahman MA, Lamb D, Rahman MM, Bahar MM, Sanderson P. Adsorption-Desorption Behavior of Arsenate Using Single and Binary Iron-Modified Biochars: Thermodynamics and Redox Transformation. ACS OMEGA 2022; 7:101-117. [PMID: 35036682 PMCID: PMC8756808 DOI: 10.1021/acsomega.1c04129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Arsenic (As) is a dangerous contaminant in drinking water which displays cogent health risks to humans. Effective clean-up approaches must be developed. However, the knowledge of adsorption-desorption behavior of As on modified biochars is limited. In this study, the adsorption-desorption behavior of arsenate (AsV) by single iron (Fe) and binary zirconium-iron (Zr-Fe)-modified biosolid biochars (BSBC) was investigated. For this purpose, BSBC was modified using Fe-chips (FeBSBC), Fe-salt (FeCl3BSBC), and Zr-Fe-salt (Zr-FeCl3BSBC) to determine the adsorption-desorption behavior of AsV using a range of techniques. X-ray photoelectron spectroscopy results revealed the partial reduction of pentavalent AsV to the more toxic trivalent AsIII form by FeCl3BSBC and Zr-FeCl3BSBC, which was not observed with FeBSBC. The Langmuir maximum AsV adsorption capacities were achieved as 27.4, 29.77, and 67.28 mg/g when treated with FeBSBC (at pH 5), FeCl3BSBC (at pH 5), and Zr-FeCl3BSBC (at pH 6), respectively, using 2 g/L biochar density and 22 ± 0.5 °C. Co-existing anions reduced the AsV removal efficiency in the order PO4 3- > CO3 2- > SO4 2- > Cl- > NO3 -, although no significant inhibitory effects were observed with cations like Na+, K+, Mg2+, Ca2+, and Al3+. The positive correlation of AsV adsorption capacity with temperature demonstrated that the endothermic process and the negative value of Gibbs free energy increased (-14.95 to -12.47 kJ/mol) with increasing temperature (277 to 313 K), indicating spontaneous reactions. Desorption and regeneration showed that recycled Fe-chips, Fe-salt, and Zr-Fe-salt-coated biochars can be utilized for the effective removal of AsV up to six-repeated cycles.
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Affiliation(s)
- Md. Aminur Rahman
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
- Department
of Public Health Engineering (DPHE), Zonal
Laboratory, Khulna 9100, Bangladesh
| | - Dane Lamb
- Chemical
and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Mohammad Mahmudur Rahman
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Md Mezbaul Bahar
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Peter Sanderson
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment, The University
of Newcastle, Callaghan, New South Wales 2308, Australia
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Ge H, Yin R, Su P, Yu L, Lei M, Sun M, Sun Z, Wang S. On-site detection of As(III) based on silver nanoparticles aggregation mediated by phosphates using surface-enhanced Raman scattering (SERS). Mikrochim Acta 2022; 189:44. [PMID: 34978598 DOI: 10.1007/s00604-021-05134-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 12/07/2021] [Indexed: 11/27/2022]
Abstract
A portable and simple method was developed for on-site selective determination of As(III) based on the SERS signal of As(III)-O vibration. The method relies on the synergistic effect of nanoparticles aggregation and analyte adsorption. Experimental results demonstrated that phosphate replaced the ligands of HH@Ag NPs, which in turn facilitated the adsorption of As(III) on the surface of HH@Ag NPs. The phosphate was introduced as an agglomerating agent to improve the detection ability of the method for As(III). The method shows good selectivity and linear relationship between 5 × 10-8 and 0.8 × 10-6 M, with the detection limit of 1.8 × 10-9 M. The method was applied to actual water samples and successfully detected As(III), indicating that the method could have application potential in actual detection scenarios.
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Affiliation(s)
- Hongwei Ge
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Ranhao Yin
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Pengchen Su
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Long Yu
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Ming Lei
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Mingtai Sun
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China
| | - Zhenli Sun
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Suhua Wang
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China. .,Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China.
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49
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Wang B, Cheng H, Lin C, Zhang X, Duan X, Wang Q, Xu D. Arsenic exposure analysis for children living in central China: From ingestion exposure to biomarkers. CHEMOSPHERE 2022; 287:132194. [PMID: 34509767 DOI: 10.1016/j.chemosphere.2021.132194] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/20/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Emerging evidence indicates that chronic low-dose arsenic (As) exposure can pose adverse health effects to children. This study aimed to systematically study the exposure risk induced by As ingestion in children living in Hubei Province, central China. The feasibility of first morning spot urine instead of 24-h urine as an environmental exposure biomarker was also explored. A total of 120 children aged 2-17 years were recruited from an urban area for the collection of biomarker samples (first morning and 24-h urine samples), environmental exposure samples (duplicate diets, drinking water, and soil), and related child-specific exposure factors. The external exposure risk, internal exposure level, and source of exposure to As in children were analyzed. The results indicated that As concentration in duplicated diets, water, and soil were 29.2 μg kg-1, 1.3 μg L-1, and 9.3 mg kg-1, respectively; these were all below the corresponding maximum allowable levels in China (the threshold value of As in most food, drinking water and soil are 0.5 mg⸱kg-1, 0.01 mg L-1, and 20 mg⸱kg-1, respectively). Dietary intake was the predominant exposure route, accounting for 90% of the total daily dose. The combined oral non-carcinogenic and carcinogenic risks all exceeded the corresponding maximum acceptable risk level. Therefore, As bioavailability should be investigated and used in health risk assessment. Multiple linear regression analysis indicated that urinary As was positively associated with dietary As, with a one-unit increase in daily As intake from the diet associating with 4.82 and 5.21 μg g-1 increases in 24-h urine and first morning urine, respectively. Furthermore, significant correlations with 24-h urine and external exposure metrics suggested that creatine-adjusted As concentrations in first morning urine could be an appropriate substitute of 24-h urine as exposure biomarkers.
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Affiliation(s)
- Beibei Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Hongguang Cheng
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Chunye Lin
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, PR China.
| | - Xuan Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Xiaoli Duan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qin Wang
- Institute of Environmental Health and Related Product Safety, Chinese Center for Disease and Prevention, Beijing, 100021, PR China
| | - Dongqun Xu
- Institute of Environmental Health and Related Product Safety, Chinese Center for Disease and Prevention, Beijing, 100021, PR China
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50
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Keesari T, Chidambaram S, Pethaperumal S, Kamaraj P, Sharma DA, Sinha UK. Arsenic distribution in sediments of multi-tier sedimentary formation of coastal Pondicherry, India - Implications on groundwater quality. MARINE POLLUTION BULLETIN 2022; 174:113193. [PMID: 34896753 DOI: 10.1016/j.marpolbul.2021.113193] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 09/02/2021] [Accepted: 11/22/2021] [Indexed: 06/14/2023]
Abstract
In this work, sediments collected from a 150-m deep litho-section of a coastal region and encompassing Quaternary, Tertiary and Cretaceous sedimentary formations were studied for arsenic distribution and other trace and redox sensitive elements. Arsenic concentration in the sediments is found to vary from <0.5 to 30 mg·kg-1 and showed an increasing trend with the depth. The highest As content is observed at a depth of 129-131 m bgl belonging to Cretaceous formation. Though XRD studies do not indicate any arsenic mineral in sediments, positive correlations between As-Fe and S, as well as ESEM-EDS and TXRF studies confirm the presence of As sorbed to FeS mineral. The organic matter and As correlations suggest microbial mediated reduction process, which may pose future risk to water quality of this prolific coastal fresh water aquifer system. The elemental profiles infer that Cretaceous and Tertiary formations demonstrate inner shelf and marginal marine condition respectively.
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Affiliation(s)
- Tirumalesh Keesari
- Isotope Hydrology Section, Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Mumbai 400 085, India; Homi Bhabha National Institute, Mumbai 400 094, India.
| | - Sabarathinam Chidambaram
- Water Research Center, Kuwait Institute for Scientific Research, P.O. Box 24885, Safat 13109, Kuwait
| | - S Pethaperumal
- State Groundwater Unit and Soil Conservation, Department of Agriculture, Puducherry 605001, India
| | - Pradeep Kamaraj
- School of Applied Natural Sciences (SoANS), Department of Applied Geology, Adama Science & Technology University, Adama 1888, Ethiopia
| | - Diana Anoubam Sharma
- Isotope Hydrology Section, Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Uday Kumar Sinha
- Isotope Hydrology Section, Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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