溴化物与氯化物对废水中COD_(Cr)测定的协同干扰效应及机理  

Study on Synergistic Interference Effect and Interference Mechanism of Bromide and Chloride on the Determination of COD_(Cr) in Wastewater

作　　者：王荟[1] 赵敏敏[1] 吴仲夏 WANG Hui;ZHAO Minmin;WU Zhongxia(State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water,Jiangsu Provincial Environmental Monitoring Center,Nanjing 210019,China)

机构地区：[1]江苏省环境监测中心,国家环境保护地表水环境有机污染物监测分析重点实验室,江苏南京210019

出　　处：《中国环境监测》2024年第3期222-227,共6页Environmental Monitoring in China

基　　金：江苏省环境监测科研基金项目(2005)。

摘　　要：针对溴化物对COD_(Cr)产生正干扰的现象,通过测定和比较只含有氯化物或溴化物以及同时含有氯化物与溴化物混合物的COD_(Cr)标准溶液,考察了溶液中只含有氯离子或溴离子以及同时含有氯离子与溴离子对COD_(Cr)测定的干扰规律,探明溴化物以及氯化物、溴化物共存对COD_(Cr)测定的协同干扰效应及干扰机理,提出消除干扰的措施,即在低浓度测定模式下扣除1/10溴离子浓度,得到样品真实的COD_(Cr)值。In view of the phenomenon that bromides produce positive interference to COD_(Cr),the COD_(Cr) standard solutions containing chlorides,bromides and mixtures of chlorides and bromides were determined and comparedThe interference rule of chlorine ion,bromine ion and the cooperation of chlorine ion and bromine ion on the determination of COD_(Cr) was investigated,and the synergistic interference effect and interference mechanism of bromide and the coexistence of chloride and bromine on the determination of COD_(Cr) were studied.The measures to eliminate the interference of bromide were put forward.The real COD_(Cr) value of the sample was obtained by using the low concentration determination model and deducting 1/10 bromine ion concentration.

关 键 词：溴化物 COD_(Cr) 干扰效应 干扰机理 

分 类 号：X832[环境科学与工程—环境工程]