湖泊科学2017，Vol.29Issue(6)：1372-1378,7.DOI:10.18307/2017.0609
无机阴离子及溶解性有机质对程海化学需氧量测定值的影响
Effects of inorganic anions and dissolved organic matter on COD measurement in Lake Chenghai
摘要
Abstract
In Lake Chenghai,annual increase in chemical oxygen demand (COD) has been observed since 2005,while biochemical oxygen demand (BOD) has remained almost constant and permanganate index(CODMn) has been increasing slowly.In order to reveal the reason for the phenomenon,typical inorganic anions such as Cl-,F-,S2-and HCO3-,as well as dissolved organic matter (DOM) such as bumic acid (HA),fulvic acid (FA) and commercial humic acid (SHA) in Lake Chenghai were surveyed for the effect of COD measurement.This study investigated the effects of inorganic anions and major DOM fractions,and their combined occurrences on COD measurement.Results showed that:Cl-could significantly affect the COD measurement with the value of 5.42 mg/L,while the presence of S2-,F-and HCO3-may hardly impair accuracy of COD measurement;the inorganic anions also had a less impact on CODMn measurement.The different concentrations of HA,FA,SHA were significantly linearly correlated with COD values,the oxidation of 1 mg C HA,FA and SHA produced 2.164,1.964 and 2.362 mg COD,respectively;while the oxidation of 1 mg C HA and FA produced 0.646 and 0.344 mg CODMn,respectively.The influence of DOM on COD measurement was significantly larger than that of CODMn;and the different concentrations of chloride ions enhanced the effect of FA and HA on COD determination.This study can build up the foundation for further exploring the internal causes for the increase in COD and CODMn in Lake Chenghai.关键词
化学需氧量/氯离子/胡敏酸/富里酸/程海Key words
Chemical oxygen demand/chloride ions/humic acid/fulvic acid/Lake Chenghai引用本文复制引用
毕婷婷,杨本芹,罗闹,杜娅楠,杨金凤,任东,顾丽鹏,潘学军..无机阴离子及溶解性有机质对程海化学需氧量测定值的影响[J].湖泊科学,2017,29(6):1372-1378,7.基金项目
云南环境保护专项资助. （）
