差减法测定高氯废水的COD值  

Determination of COD of High Chloride Wastewater by Subtraction Method

作　　者：林诗敏 王茀跃 白书明 

机构地区：[1]海南省辐射环境监测站,海南海口570203

出　　处：《中国给水排水》2009年第24期79-81,共3页China Water & Wastewater

摘　　要：用国标法测定高氯废水的COD时易产生较大误差,且误差随着C l-浓度的增加而增大,为此采用差减法分别测定了含高COD和低COD浓度的高氯废水的COD值,结果表明,含高COD和低COD浓度的高氯废水,分别在C l-<12 500 mg/L和<8 000 mg/L时,测定误差在5%以内,满足国标允许范围,而超出此值时则易产生较大误差。Significant errors occur when COD value of high chloride wastewater is determined by the national standard,and the error is increased with the increasing of chloride concentration.Therefore,the subtraction method was used for determination of COD of high chloride wastewaters with high COD and low COD.The results show that the error is low than 5% when the chloride concentrations in high and low COD wastewater are less than 12 500 mg/L and 8 000 mg/L respectively,meeting the permissible range of the national...

关 键 词：高氯废水 COD 差减法 

分 类 号：X832[环境科学与工程—环境工程]