Formation of dimethyldithioarsinic acid in a simulated landfill leachate in relation to hydrosulfide concentration

• Published in: Environmental geochemistry and health 2016-02, Vol.38 (1), p.255-263
• Main Authors: An, Jinsung, Kim, Ki-Hyun, Kong, Mihye, Kim, Joo-Ae, Shin, Jeoung Hwa, Ahn, Yun Gyong, Yoon, Hye-On
• Format: Article
• Language: English
• Subjects: Acids; Arsenicals - chemistry; Cacodylic Acid - analogs & derivatives; Cacodylic Acid - chemistry; Earth and Environmental Science; Environment; Environmental Chemistry; Environmental Health; Environmental Monitoring; Geochemistry; Hydrogen Sulfide - chemistry; Landfill; Landfills; Leachates; Liquid chromatography; Municipal solid waste; Original Paper; Public Health; Sodium sulfate; Soil Science & Conservation; Sulfides; Terrestrial Pollution; Toxicity; Waste Disposal Facilities; Waste disposal sites; Water Pollutants, Chemical - chemistry
• ISSN: 0269-4042; 1573-2983
• DOI: 10.1007/s10653-015-9714-z

Dimethyldithioarsinic acid (DMDTA V ), present in such intense sources as municipal landfill leachate, has drawn a great deal of attention due to its abundant occurrence and different aspect of toxicity. The hydrosulfide (HS − ) concentration in leachate was studied as a major variable affecting the formation of DMDTA V . To this end, the HPLC–ICPMS system equipped with the reversed-phase C18 column was used to determine DMDTA V . Simulated landfill leachates (SLLs) were prepared to cover a mature landfill condition with the addition of sodium sulfate and sulfide at varying concentrations in the presence of dimethylarsinic acid (DMA V ). The concentration of sodium sulfide added in the SLLs generally exhibited a strong positive correlation with the concentration of DMDTA V . As such, the formation of DMDTA V in the SLLs is demonstrated to be controlled by the interactive relationship between DMA V and the HS − .