1. Rapid on-site separation of As(III) and As(V) in waters using a disposable thiol-modified sand cartridge.
- Author
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Du, Jingjing, Che, Dongsheng, Zhang, Jianfeng, and Jing, Chuanyong
- Subjects
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THIOLS , *ARSENIC , *AQUEOUS solutions , *GENETIC speciation , *FLUORESCENCE spectroscopy , *ENVIRONMENTAL toxicology research - Abstract
The rapid redox transformation of arsenic (As) species in waters presents a great environmental challenge in the accurate determination of its concentration and toxicity. The motivation of the present study was therefore to develop a method for rapid on-site separation of As(V) and As(III) in various aqueous matrices. The authors synthesized a thiol-modified sand (T-sand) that selectively removed As(III) but did not adsorb As(V). The novel application of this T-sand in a disposable cartridge was able to successfully separate As(V) (37-970 µg Lā1) and As(III) (not detected to 488 µg Lā1) in 23 groundwater samples collected in areas with naturally occurring As. The As speciation results determined with T-sand separation in the field were consistent with those obtained using high-performance liquid chromatography-atomic fluorescence spectrometry. Furthermore, the T-sand cartridge was applicable in a wide variety of matrices, including groundwater, leachants of the toxicity-characteristic leaching procedure, and extracts from the California waste extraction test; sequential extraction test; and in vitro gastrointestinal extraction. This easy-to-use separation method is especially suitable for routine field monitoring of As speciation. Environ Toxicol Chem 2014;33:1692-1696. © 2014 SETAC [ABSTRACT FROM AUTHOR]
- Published
- 2014
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