微波消解法测定高氯废水的COD探讨
Journal of Xihua University(Natural Science Edition)(2017)
Abstract
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≤士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CI-对COD测定干扰,测定结果准确可靠.
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Key words
microwave digestion method,high chlorine containing wastewater,COD
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