微波消解法测定高氯废水的COD探讨  

Research on Testing of COD in Wastewater Containing High Chlorine Based on Microwave Digestion Method

作　　者：冯栩[1] 鲍晋[2] 曹潜 刘涛[1] 刘恒[1] 梁婧华 夏丽娟[1] 杨阳[1] FENG Xu BAO Jin CAO Qian LIU Tao LIU Heng LIANG Jinhua XIA Lijuan YANG Yang(School of Food and Bioengineering, Xihua University, Chengdu 610039 China Downhole Service Division of Chuanqing Drilling Engineering Co. , Ltd. , CNPC , Chengdu 610051 China)

机构地区：[1]西华大学食品与生物工程学院,四川成都610039 [2]川庆钻探工程有限公司井下作业公司,四川成都610051

出　　处：《西华大学学报（自然科学版）》2017年第2期91-95,共5页Journal of Xihua University:Natural Science Edition

基　　金：西华大学重点科研基金项目(z1220409;Z1520526);四川省教育厅项目(14ZB0125)

摘　　要：高氯废水中氯离子的存在会严重干扰COD的测定。本文采用微波消解法测定高氯废水的COD,结果表明,采用此方法时氯离子对COD测定结果的影响小于传统重铬酸盐法。当氯离子质量浓度在0~30 000 mg/L、COD≤500 mg/L时,可添加一定量的硫酸汞进行COD的测定,相对误差≤±5%,满足国标允许范围。对实际水样页岩气压裂返排液进行测定时,微波消解法能够消除Cl^-对COD测定干扰,测定结果准确可靠。Chlorides in the wastewater with high concentration seriously interrupts the determination of chemical oxygen demand （COD）. Microwave digestion method was used to test COD of wastewater with high chlorine. The experiment results show that for this method, the effect of C1 - is weaker than that by traditional potassium dichromate method. As the concentration of Cl- is between 0 - 30 000 mg/L and COD ≤500 mg/L, a certain amount of mercuric sulfate would be added during the COD test, and fractional error of test result is less than ± 5% , which was in the scope of national standard. When the COD of shell gas fracturing flow - back fluid was tested, the effect of Cl- on the COD test would be eliminated by using microwave digestion method and the test results was accurate and reliable.

关 键 词：微波消解法 高氯废水 COD 

分 类 号：X703[环境科学与工程—环境工程]