Identification of volatile arsenical compounds produced during phytoremediation using a novel sampling and GC-MS technique

摘要：

Phytoremediation, the use of plants and microbes to clean up inorganic and organic pollutants, has shown great promise as an inexpensive and feasible form of remediation. More recently, studies have shown that some plants have an amazing capacity to volatilize contaminants and can be an effective remediation strategy if the chemicals released are non-toxic. Arsenic is the number one pollutant on the US EPA priority list for 2005. Arsenic contamination and remediation has drawn great attention in the scientific community. However, its toxicity also varies depending on its form. We evaluated, optimized, and then utilized a solid phase microfiber extraction (SPME) head space sampling technique to characterize the organoarsinical emissions from Rabbit foot Grass (polypogon monspeliensis) in arsenic fortified soils to determine if the potentially more toxic organic forms of arsenic were released during phytovolatilization (ASH<,3>, As H <,2>CH<,3>, AsH(CH<,3>)<,2>, and As(CH<,3>)<,3>). The SPME fiber that proved best fitted for this application was the DVB/CAR/PDMS fiber, although, we did not detect any of the above compounds. We did however, detect and confirm, the emissions of dimethylchloroarsine (AsCl(CH)<,2>) and pentamethylarsine (As(CH)<,5>).

关键词： Arsenic phytoremediation remediation sampling speciation

作者: L. Ruppert Z.-Q. Lin R. P. Dixon K. A. Johnson

作者单位: Department of Chemistry, Southern Illinois University Edwardsville (SIUE), Illinois, 62026-1608, USA Environmental Sciences Program, SIUE Department of Biological Sciences, SIUE Department of Chemistry, Southern Illinois University Edwardsville (SIUE), Illinois, 62026-1608, USA

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 873-874

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）