Simultaneous dissipation of trichloroethene and arsenic from co-contaminated groundwater by coupling biodechlorination and biodetoxification with assistance of biochar

Abstract

Highlights Biochar enhanced microbes’ metabolic activity by adsorbing TCE and intermediate products allowing them to be degraded on its surface. While biochar itself cannot remove As, it acted as carrier to remove As-laden microorganisms, achieving 70% As-removal from groundwater. Biochar enhanced the self-detoxification ability of microorganisms for As by enriching microbes possessing crucial As-transforming genes.

Keywords

• Co-contamination
• Complete dechlorination
• Microbes’ self-detoxification
• As-transforming genes
• Spatial distribution of microbes