Arsenic Methylation and its Relationship to Abundance and Diversity of arsM Genes in Composting Manure.

ABSTRACT: Although methylation is regarded as one of the main detoxification pathways for arsenic (As), current knowledge about this process during manure composting remains limited. In this study, two pilot-scale compost piles were established to treat manure contaminated with As. An overall accumulation of methylated As occurred during 60 day-composting time. The concentration of monomethylarsonic acid (MMA) increased from 6 to 190 μg kg^-1 within 15 days and decreased to 35 μg kg^-1 at the end of the maturing phase; while the concentration of dimethylarsinic acid (DMA) continuously increased from 33 to 595 μg kg^-1 over the composting time. The arsM gene copies increased gradually from 0.08 × 10⁹ to 6.82 × 10⁹ copies g^-1 dry mass over

SUBMITTER: Zhai W 

PROVIDER: S-EPMC5339872 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature