水环境重金属污染的激光诱导击穿光谱监测  

Monitoring of Heavy Metals Pollution of Water by Laser-induced Breakdown Spectroscopy

作　　者：张谦[1] 熊威[1] 赵芳[1] 李润华[1] 

机构地区：[1]华南理工大学理学院物理系,广东广州510640

出　　处：《环境科学与技术》2009年第B12期98-101,共4页Environmental Science & Technology

基　　金：国家自然基金资助项目（10874047）.

摘　　要：文章综述了激光诱导击穿光谱（Laser-induced Breakdown Spectroscopy，LIBS）技术的基本原理及其在水中重金属污染监测方厩的应用。比较了单脉冲LIBS技术和双脉冲LIBS技术的优缺点。分析了该技术的发展状况和存在的一些主要问题。同时介绍了本课题组近期研究工作及取得的成果。运用电沉积方法把水中重金属富集到高纯铝棒上再进行LIBS分析，能够极大地改善光谱分析灵敏度。对Cr^3＋、Mn^2＋、Cu^2＋、Zn^2＋、Cd^2＋、Pb^2＋等元素，检铡限达到了0．16～1．35μg／L的水平。This article reviews the basic principle of laser-induced breakdown spectroscopy （LIBS） and its applications on monitoring of the heavy metals pollution of water. The advantages and disadvantages of single pulse LIBS and double pulse LIBS technologies were compared. The technical development and problems existed there were discussed. At the same time, the research works in our group and the new results obtained were introduced. The trace heavy metal ions, Cr^3＋、Mn^2＋、Cu^2＋、Zn^2＋、Cd^2＋ and Pb^2＋ in water were electrically deposited on the surface of a high purity aluminum rod and then analyzed with LIBS to enhance their spectral detection sensitivity significantly. The limits of detection of these ions were determined to be 0.16-1.35μg/L.

关 键 词：激光诱导击穿光谱 电沉积 重金属 水污染 

分 类 号：X830[环境科学与工程—环境工程]