Arsenic speciation in municipal landfill leachate

作者：Li Yarong; Low Gary K C; Scott Jason A^*; Amal Rose

来源：Chemosphere, 2010, 79(8): 794-801.

DOI：10.1016/j.chemosphere.2010.03.010

• Arsenic
• Speciation
• Dimethyldithioarsinic acid
• Dimethylmonothioarsinic acid
• Municipal landfill leachate

Arsenic species in municipal landfill leachates (MLL) were investigated by HPLC-DRC-ICPMS and LC-ESI-MS/MS. Various arsenic species including arsenate (iAs(V)), arsenite (iAs(III)), monomethylarsonic acid (MMA(V)), dimethylarsinic acid (DMA(V)), as well as sulfur-containing organoarsenic species were detected. Two sulfur-containing arsenic species in a MLL were positively identified as dimethyldithioarsinic acid (DMDTA(V)) and dimethylmonothioarsinic acid (DMMTA(V)) by comparing their molecular ions, fragment patterns and sulfur/arsenic ratios with in-house synthesised thiol-organoarsenic compounds. The findings demonstrated the potential for transformation of DMA(V) to DMDTA(V) and DMMTA(V) in a DMA(V)-spiked MLL in a landfill leachate environment.

• 出版日期2010-5