Role of organic matter and humic substances in the binding and mobility of arsenic in a Gangetic aquifer
Article
Article Title | Role of organic matter and humic substances in the binding and mobility of arsenic in a Gangetic aquifer |
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ERA Journal ID | 36368 |
Article Category | Article |
Authors | Kar, Sandeep (Author), Maity, Jyoti Prakash (Author), Jean, Jiin-Shuh (Author), Liu, Chia-Chuan (Author), Nath, Bibhash (Author), Lee, Yao-Chang (Author), Bundschuh, Jochen (Author), Chen, Chien-Yen (Author) and Li, Zhaohui (Author) |
Journal Title | Journal of Environmental Science and Health Part A: Toxic Hazardous Substances and Environmental Engineering |
Journal Citation | 46 (11), pp. 1231-1238 |
Number of Pages | 8 |
Year | 2011 |
Publisher | Taylor & Francis |
Place of Publication | United Kingdom |
ISSN | 1093-4529 |
1532-4117 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/10934529.2011.598796 |
Web Address (URL) | http://www.tandfonline.com/doi/full/10.1080/10934529.2011.598796 |
Abstract | Arsenic (As) enrichment in groundwater has led to extensive research, particularly on the factors responsible for its release into groundwater. In the Gangetic plain, organic matter driven microbial reduction of Fe-oxyhydroxides is considered as the most plausible mechanism of As release into groundwater. However, the role of organic matter in the aqueous environment is not well known and particularly that of organometallic complex. In this study, we have characterized bulk sediment and groundwater samples, collected from Barasat, West Bengal, India, to understand the effect of organic matter in the binding and mobility of As in the subsurface environment. The results showed a moderate correlation (R2 = 0.49, p < 0.05) between dissolved organic carbon (DOC) and As in groundwater, suggesting that DOC has a role in releasing As into groundwater. The relative fluorescent intensity (RFI) of the dissolved humic substances in groundwater showed a maximum value of 65 QSU (mean: 47 ± 8 QSU). FT-IR spectra of the extracted humic acid fractions of the sediment showed COO-, C = O, OH, and C = C (aromatic ring) functional groups, which may act as a chelating agents with the metal(loid)s. FT-IR spectra of the HA-As complex exhibited specific peaks at 1242 and 832 cm−1 in the fingerprint region. This is similar to the extracted humic acid fractions of the Gangetic sediment, suggesting binding of As with humic substances. |
Keywords | arsenic, biogeochemistry, organic matter Ganges aquifer, India |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 410402. Environmental assessment and monitoring |
370302. Inorganic geochemistry | |
350505. Occupational and workplace health and safety | |
410404. Environmental management | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | National Cheng Kung University, Taiwan |
National Chung Cheng University, Taiwan | |
University of Sydney | |
National Synchrotron Radiation Research Center, Taiwan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2922/role-of-organic-matter-and-humic-substances-in-the-binding-and-mobility-of-arsenic-in-a-gangetic-aquifer
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