快速消解电位滴定法测定电镀废水的化学需氧量
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摘要
建立了采用快速消解法处理电镀废水样品,电位滴定测定水中化学需氧量的方法。对方法进行了选择、优化及验证。在优化的条件下,高浓度和低浓度的化学需氧量溶液测试的回收率分别为96.2%和93.4%,方法的精密度分别为2.1%~4.7%。该法高效快捷、操作简便、灵敏准确,适用于电镀废水中化学需氧量含量的快速测定。
A testing method for chemical oxygen demand in electroplating wastewater samples using rapid digestion and potentiometric titration was developed. The test parameters were optimized and validated. Under the optimized conditions,the recoveries for the high and low concentration of chemical oxygen demand were 96. 2% and 93. 4%,respectively. The relative standard deviations of this method were 2. 1% to 4. 7%. The proposed method could be applied in the determination for chemical oxygen demand content in electroplating wastewater,with the advantages of rapidity,simplicity,high sensitivity and accuracy.
A testing method for chemical oxygen demand in electroplating wastewater samples using rapid digestion and potentiometric titration was developed. The test parameters were optimized and validated. Under the optimized conditions,the recoveries for the high and low concentration of chemical oxygen demand were 96. 2% and 93. 4%,respectively. The relative standard deviations of this method were 2. 1% to 4. 7%. The proposed method could be applied in the determination for chemical oxygen demand content in electroplating wastewater,with the advantages of rapidity,simplicity,high sensitivity and accuracy.
引文
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[2]Abhinesh K P,Parmesh K C.Electrochemical treatment of rice grain-based distillery effluent:chemical oxygen demand and colour removal[J].Environmental technology,2014,(1/4):242-249.
[3]韦聪,李磊,吕文英,等.工业废水CODCr测定方法与技术发展过程分析[J].中国测试,2017(7):1-9.
[4]谭立香.化学耗氧量的快速测定法与重铬酸钾蒸馏法的对比[J].聚酯工业,2017,30(4):23-25.
[5]董萍,胡斯翰,孙忠.不同来源废水中TOC与COD相关性研究[J].环境科学与管理,2018,(2):117-120.
[6]HJ 828-2017,水质化学需氧量的测定重铬酸盐法[S].
[7]HJ/T 399-2007,水质化学需氧量的测定快速消解分光光度法[S].
[8]沈澄英.掩蔽剂硫酸汞用量对水样中CODCr测定的影响[J].安徽化工,2014,(6):96-98.