摘要
化学需氧量(COD)是评价水体有机污染的一项重要指标,氯离子是COD测定中的主要干扰物之一,尤其是针对高含氯低COD水样的测定难度很大。如何有效消除氯离子的干扰,提高COD测定的准确性,是环境监测/检测、研究工作关注和研发的重要研究方向。本文对高含氯低COD水样测定方法的国内外研究进展作了详细综述,包括氯气校正法,以及简单介绍了新兴的流动注射分析法等,评价了各种方法的适用条件和优缺点,为筛选合适的高含氯低COD水样检测方法以及获取有代表性、精确性、精密性、可比性的数据提供参考。
Chemical oxygen demand(COD) is an important indicator to evaluate the organic pollution of water. Chloride ion is one of the main disturbances in COD determination,especially for high chlorine and low COD water samples. How to effectively eliminate the interference of chloride ions and improve the accuracy of COD measurement is an important research direction of environmental monitoring and testing. In this paper,we reviewed the research progress of determination of low COD in high chlorine water samples,introduced some determination methods including the chlorine calibration method and the emerging flow injection analysis method,and evaluated the applicable conditions and advantages and disadvantages of various methods. This paper provides a reference for the screening of suitable method for determination of low COD in high chlorine water samples,also helps to obtain data of representative,accuracy,precision and comparability.
出处
《环保科技》
2017年第1期41-46,64,共7页
Environmental Protection and Technology
关键词
高含氯低COD废水
化学需氧量
high-chlorine and low-COD wastewater
chemical oxygen demand(COD)
