摘要
以某污水厂的高氯低COD生化出水为研究对象,探讨了硫酸汞加入量、K2Cr2O7溶液浓度、反应酸度、取水样量等参数对COD测定的影响,探讨消除该厂Cl-干扰最简单有效方法,结果表明:控制硫酸汞与氯离子比为15∶1(质量比)、K2Cr2O7浓度为0.18 mol/L、水样稀释0.75倍、Ag2SO4-H2SO4加入量为28mL,皆可有效减少氯离子的干扰。该方法相对氯气校正法,操作简单、准确可靠。
Studying the high chlorine and low COD biotreated effluent of certain sewage plant,this paper discusses the influence of mercury sulfate dosage,K2Cr2O7 concentration,reaction acidity and water sample volume on COD determination.Furthermore,the most simple and effective way for eliminating the Cl-interference is presented in this paper and the results show that: The ratio between mercury sulfate and chloride ion 15∶1(mass ratio),K2Cr2O7 concentration 0.18 mol/L,water sample dilution 0.75-fold and Ag2SO4-H2SO4 dosage 28 mL,chloride ion interference can be effectively reduced.Compared with chlorine correction approach,this method is simpler,more accurate and reliable as well as expands the serviceable range of potassium dichromate method.
出处
《油气田环境保护》
CAS
2010年第4期42-44,共3页
Environmental Protection of Oil & Gas Fields
关键词
高氯低COD废水
COD测定
重铬酸钾法
氯气校正
high chlorine low COD wastewater
COD test
potassium dichromate method
chlorine correction
作者简介
成国飞，1991年毕业于浙江工业大学化学工程专业，工程师，现在上虞市水务集团有限公司从事水污染防治与管理工作。通信地址：浙江省绍兴市上虞市还珠路2号百官街道办事处五楼，312300
