Abundance and diversity of methanogens: potential role in high arsenic groundwater in Hetao Plain of Inner Mongolia, China

The Science of the Total Environment
Yanxin WangY X Wang

Abstract

To investigate the community diversity and abundance of methanogens and their potential role in high arsenic groundwater, 17 groundwater samples from Hetao Plain of Inner Mongolia were investigated with an integrated method including 16S rRNA gene clone library, quantitative polymerase chain reaction and geochemistry analyses. Total arsenic (AsTot) concentrations were 82.7-1088.7 μg/L and arsenite (AsIII) mostly dominated in these samples with percentages of 0.04-0.79. CH₄ concentrations ranged from 0.01 to 292 μg/L and distinctly elevated only when AsTot were relatively high and SO₄(2-) were distinctly low. Principal component analysis indicated that these samples were divided into three groups according to the variations of AsTot, CH₄ and SO₄(2-). AsTot concentrations were distinctly high in the group with high CH₄ and low SO₄(2-) comparing to the other two groups (one with high CH₄ and high SO₄(2-), the other with low CH₄ and SO₄(2-)). The mcrA gene (methyl coenzyme-M reductase gene) based phylogenetic analysis of methanogens population showed that methanogenic archaea was diverse but mainly composed of Methanomicrobiales, Methanosarcinales, Methanobacteria and unidentified groups, with Methanomicrobiales being distinctly do...Continue Reading

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Citations

Jun 18, 2017·Environmental Science and Pollution Research International·Guannan LiangYunfeng Xu
Jan 30, 2016·Water, Air, and Soil Pollution·Lucia Rodriguez-FreireJames A Field
Oct 31, 2018·International Journal of Environmental Research and Public Health·Claudia Avila-SandovalEdith Olmos-Trujillo
Dec 2, 2020·The Science of the Total Environment·Marco RotirotiBarbara Leoni

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