Zhao N J, Meng D S, Jia Y, Ma M J, Fang L, Liu J G, Liu W Q
Opt Express. 2019 Apr 15;27(8):A495-A506. doi: 10.1364/OE.27.00A495.
Heavy metal pollution from industrial wastewater is an important source. A method for heavy metals determination in industrial wastewater based on laser-induced breakdown spectroscopy (LIBS) technique was studied and the on-line monitoring system that used automatic graphite enrichment and spatial plasma confinement detection was developed and field demonstrated. The limits of detection (LOD) of heavy metal elements (Cd, Cr, Cu, Ni, Pb, Zn) could reach several μg/L. In Tongling, the on-line heavy metal monitor was field demonstrated. The calibration curves of copper and zinc were built on site, and then on-line monitoring was conducted. The measurement results of this monitor were compared with ICP-OES and had a good correlation. The results showed that the heavy metal monitor could be used for on-line detection of heavy metals in wastewater and had a good reliability.
工业废水的重金属污染是一个重要来源。研究了一种基于激光诱导击穿光谱（LIBS）技术测定工业废水中重金属的方法，并开发了采用自动石墨富集和空间等离子体约束检测的在线监测系统并进行了现场演示。重金属元素（镉、铬、铜、镍、铅、锌）的检测限可达几μg/L。在铜陵进行了在线重金属监测仪的现场演示。现场建立了铜和锌的校准曲线，然后进行在线监测。将该监测仪的测量结果与电感耦合等离子体发射光谱仪（ICP-OES）进行比较，具有良好的相关性。结果表明，该重金属监测仪可用于废水中重金属的在线检测，具有良好的可靠性。
