Assessment of solid phase microfiber extraction fibers for the monitoring of volatile organoarsinicals emitted from a plant-soil system.
Assessment of solid phase microfiber extraction fibers for the monitoring of volatile organoarsinicals emitted from a plant-soil system.
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DOI：
10.1016/j.jhazmat.2012.06.046
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发表时间：
2013-11
影响因子：
13.6
通讯作者：
L. Ruppert;Zhi-Qing Lin;Robert P. Dixon;Kevin A. Johnson
中科院分区：
文献类型：
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作者：
L. Ruppert;Zhi-Qing Lin;Robert P. Dixon;Kevin A. Johnson
植物修复，即利用植物和微生物来清除无机和有机污染物，作为一种廉价可行的修复形式，已显示出巨大的前景。最近的研究表明，一些植物具有惊人的挥发污染物的能力，如果释放的化学物质无毒，可以成为有效的补救策略。砷污染及其修复已引起科学界的高度重视。然而，其毒性也因其形式而异。我们评估，优化，然后利用固相微纤维萃取（SPME）顶空采样技术，以表征有机砷的排放从兔脚草（Polypogon monspeliensis）在砷处理过的土壤，以确定是否潜在的更有毒的有机形式的砷（AsH 3，AsH 2CH 3，AsH（CH 3）2，和As（CH 3）3）正在从植物-土壤系统中排放。最适合此应用的SPME光纤是采样周期为45分钟的DVB/CAR/PDMS光纤。我们确实检测到并确认了二甲基氯胂（AsCl（CH 3）2）和五甲基胂（As（CH 3）5）的排放。然而，据确定，在植物挥发过程中没有释放毒性更大的有机形式的砷。
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 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 rabbitfoot grass (Polypogon monspeliensis) in arsenic treated soils to determine if the potentially more toxic organic forms of arsenic (AsH3, AsH2CH3, AsH(CH3)2, and As(CH3)3) were being emitted from the plant–soil system. The SPME fiber that proved best fitted for this application was the DVB/CAR/PDMS fiber with a 45 min sampling period. We did detect and confirm the emissions of dimethylchloroarsine (AsCl(CH3)2) and pentamethylarsine (As(CH3)5). However, it was determined that the more toxic organic forms of arsenic were not released during phytovolatilization.