title: Arsenic speciation in municipal landfill leachate.
abstract: 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.
authors.affiliation: School of Chemical Engineering, The University of New South Wales, Sydney 2052, Australia; Environmental Forensic and Analytical Science, Department of Environment, Climate Change and Water (NSW), Lidcombe 2141, Australia.
authors.forename: Yarong
authors.initials: Y
authors.lastname: Li
authors.forename: Gary K-C
authors.initials: GK
authors.lastname: Low
authors.forename: Jason A
authors.initials: JA
authors.lastname: Scott
authors.forename: Rose
authors.initials: R
authors.lastname: Amal
mesh_terms: D001149:Arsenates / Q000032:analysis / Q000737:chemistry; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry / Q000145:classification; D001152:Arsenicals / Q000032:analysis / Q000737:chemistry; D002101:Cacodylic Acid / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry; D002947:Cities; D012037:Refuse Disposal; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000145:classification
chemical_list: D001149:Arsenates; D001152:Arsenicals; D014874:Water Pollutants, Chemical; C518668:dimethyldithioarsinic acid; C518667:dimethylmonothioarsinic acid; D002101:Cacodylic Acid; C020300:monomethylarsonic acid; D001151:Arsenic; C025657:arsenic acid