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Title: Seasonal microbial variation accounts for arsenic dynamics in shallow alluvial aquifer systems

Abstract

Determining the temporal variation of microbial communities in groundwater systems is essential to improve our understanding of hydrochemical dynamics in aquifers, particularly as it relates to the fate of redox-sensitive contaminants like arsenic (As). Therefore, a high-resolution hydrobiogeochemical investigation was conducted in the As-affected alluvial aquifer systems of the Jianghan Plain. In two 25 m-deep monitoring wells, the seasonal variation in the composition of groundwater microbial communities was positively correlated with the change in groundwater level (R = 0.47 and 0.39 in NH03B and NH05B, respectively, P < 0.01), implying that the latter could be a primary driver of the seasonal microbial dynamics. In response to the fluctuating groundwater level, iron (Fe) reducers within the Desulfuromonadales were dominant (9.9 ± 4.7% among different sampling sites) in groundwater microbial communities during the monsoon season and associated with high concentrations of Fe(II) and As, while the predominance (16.7 ± 15.2% among different sampling sites) of iron-oxidizers the Gallionellaceae was accompanied by low Fe(II) and As in the non-monsoon season. Here, these results suggest that microbially-mediated iron reduction/oxidation may have governed the seasonal mobilization/scavenging of As in groundwater. Our results provide new insights into mechanisms responsible for seasonal variations in groundwater As concentrationsmore » in similar aquifer systems.« less

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [2];  [3];  [1];  [1]
  1. China Univ. of Geosciences, Wuhan (People's Republic of China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); California Dept. of Water Resources, Sacramento, CA (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation of China; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23). Subsurface Biogeochemical Research
OSTI Identifier:
1490093
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Hazardous Materials
Additional Journal Information:
Journal Volume: 367; Journal Issue: C; Journal ID: ISSN 0304-3894
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Groundwater level fluctuation; Iron redox cycling; Microbial community dynamics; Seasonal variation; Yangtze River Basin

Citation Formats

Zheng, Tianliang, Deng, Yamin, Wang, Yanxin, Jiang, Hongchen, O’Loughlin, Edward J., Flynn, Theodore M., Gan, Yiqun, and Ma, Teng. Seasonal microbial variation accounts for arsenic dynamics in shallow alluvial aquifer systems. United States: N. p., 2018. Web. doi:10.1016/j.jhazmat.2018.12.087.
Zheng, Tianliang, Deng, Yamin, Wang, Yanxin, Jiang, Hongchen, O’Loughlin, Edward J., Flynn, Theodore M., Gan, Yiqun, & Ma, Teng. Seasonal microbial variation accounts for arsenic dynamics in shallow alluvial aquifer systems. United States. doi:10.1016/j.jhazmat.2018.12.087.
Zheng, Tianliang, Deng, Yamin, Wang, Yanxin, Jiang, Hongchen, O’Loughlin, Edward J., Flynn, Theodore M., Gan, Yiqun, and Ma, Teng. Sun . "Seasonal microbial variation accounts for arsenic dynamics in shallow alluvial aquifer systems". United States. doi:10.1016/j.jhazmat.2018.12.087. https://www.osti.gov/servlets/purl/1490093.
@article{osti_1490093,
title = {Seasonal microbial variation accounts for arsenic dynamics in shallow alluvial aquifer systems},
author = {Zheng, Tianliang and Deng, Yamin and Wang, Yanxin and Jiang, Hongchen and O’Loughlin, Edward J. and Flynn, Theodore M. and Gan, Yiqun and Ma, Teng},
abstractNote = {Determining the temporal variation of microbial communities in groundwater systems is essential to improve our understanding of hydrochemical dynamics in aquifers, particularly as it relates to the fate of redox-sensitive contaminants like arsenic (As). Therefore, a high-resolution hydrobiogeochemical investigation was conducted in the As-affected alluvial aquifer systems of the Jianghan Plain. In two 25 m-deep monitoring wells, the seasonal variation in the composition of groundwater microbial communities was positively correlated with the change in groundwater level (R = 0.47 and 0.39 in NH03B and NH05B, respectively, P < 0.01), implying that the latter could be a primary driver of the seasonal microbial dynamics. In response to the fluctuating groundwater level, iron (Fe) reducers within the Desulfuromonadales were dominant (9.9 ± 4.7% among different sampling sites) in groundwater microbial communities during the monsoon season and associated with high concentrations of Fe(II) and As, while the predominance (16.7 ± 15.2% among different sampling sites) of iron-oxidizers the Gallionellaceae was accompanied by low Fe(II) and As in the non-monsoon season. Here, these results suggest that microbially-mediated iron reduction/oxidation may have governed the seasonal mobilization/scavenging of As in groundwater. Our results provide new insights into mechanisms responsible for seasonal variations in groundwater As concentrations in similar aquifer systems.},
doi = {10.1016/j.jhazmat.2018.12.087},
journal = {Journal of Hazardous Materials},
number = C,
volume = 367,
place = {United States},
year = {2018},
month = {12}
}

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Works referencing / citing this record:

Exploring Biodiversity and Arsenic Metabolism of Microbiota Inhabiting Arsenic-Rich Groundwaters in Northern Italy
journal, July 2019