Gondal M A, Hussain T, Yamani Z H, Baig M A
Laser Research Laboratory, Physics Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
J Hazard Mater. 2009 Apr 30;163(2-3):1265-71. doi: 10.1016/j.jhazmat.2008.07.127. Epub 2008 Aug 3.
Due to large growth in leather and textile industries to cater for the needs of a growing world population, contamination of soil and water resources by chromium has become a great threat for humans and animals. In this work, Laser Induced Breakdown Spectroscopy (LIBS) was applied to monitor the remediation process of soil contaminated with Chromium metal. This study was conducted at a laboratory scale by setting up an experiment in a container holding soil contaminated with chromium. This setup represents actual field conditions where remediation process could be applied and monitored for the removal of toxic metals like Cr. For generation of LIBS spectrum, the plasma was produced by focusing a pulsed Nd: YAG laser at 1064 nm on the soil contaminated with chromium under remediation process. The evaluation of the potential and capabilities of LIBS as a rapid tool for remediation process of contaminated sites is discussed in detail. Optimal experimental conditions were evaluated for improving the sensitivity of our LIBS system for monitoring of remediation process through parametric dependence study. The minimum detection limit of our spectrometer for chromium in soil matrix was 2 mg Kg(-1).
由于皮革和纺织工业的大规模增长以满足不断增长的世界人口的需求，铬对土壤和水资源的污染已对人类和动物构成巨大威胁。在这项工作中，激光诱导击穿光谱法（LIBS）被用于监测被铬金属污染的土壤的修复过程。本研究在实验室规模下进行，通过在装有被铬污染土壤的容器中设置实验。该设置代表了实际现场条件，在这种条件下可以应用和监测修复过程以去除诸如铬等有毒金属。为了产生LIBS光谱，通过将波长为1064 nm的脉冲Nd:YAG激光聚焦在处于修复过程中的被铬污染的土壤上产生等离子体。详细讨论了LIBS作为污染场地修复过程的快速工具的潜力和能力评估。通过参数依赖性研究评估了最佳实验条件，以提高我们的LIBS系统监测修复过程的灵敏度。我们的光谱仪对土壤基质中铬的最低检测限为2 mg Kg(-1)。
