Assessing Effects of Climate Change on Biogeochemical Cycling of Trace Metals in Alluvial and Coastal Watersheds
Ming-Kuo Lee, Michael Natter, Jeff Keevan, Kirsten Guerra, James Saunders, Ashraf Uddin, Munir Humayun, Yang Wang, Alison R. Keimowitz
International Journal of Environment and Climate Change · pp. 44–66 · Published 10 Apr 2013
10.9734/BJECC/2013/3061Abstract
Assessing the impacts of climate changes on water quality requires an understanding of the biogeochemical cycling of trace metals. Evidence from research on alluvial aquifers and coastal watersheds shows direct impacts of climate change on the fate and transformation of trace metals in natural environments. The case studies presented here use field data and numerical modeling techniques to test assumptions about the effects of climate change on natural arsenic contamination of groundwater in alluvial aquifers and mercury bioaccumulation in coastal salt marshes. The results show that the rises of sea level and river base during the warm Holocene period has led to an overall increase in groundwater arsenic concentration due to the development of reducing geochemical conditions and sluggish groundwater movement. Modeling results indicate that the intrusion of seawater occurring during high sea-level stand may lead to desorption of arsenic from surface of hydrous oxides due to pH effects and ionic competition for mineral sorbing sites. Our results also show that contamination and bioaccumulation of Hg and other metals in estuarine and coastal ecosystems may be influenced by climate-induced hydrologic modifications (atmospheric deposition, riverine input, salinity level, etc.).
Cited by 9
Md Mahfujur Rahman, Ming-Kuo Lee, Ashraf Uddin · Minerals · 2020
Ming-Kuo Lee, J. Saunders, Theodore Wilson · Bioremediation Journal · 2018
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N. L. B. Kouassi, K. Yao, A. Trokourey · 2015
Wei Zhang, N. Chang · 2013
Bindiya Aribam, Wazir Alam, Binota Thokchom · 2021
Ming-Kuo Lee, C. Mitra, Amy Thomas · 2015
Ming-Kuo Lee, Chandana Mitra, Amy Thomas · Handbook of Climate Change Mitigation and Adaptation · 2016
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