完全氧化法测定高氯废水COD_(Cr)

COD_(Cr) Determination Using Complete Oxidation Method for High Chloride-containing Wastewater

采用完全氧化法对高氯废水CODCr测定方法进行了研究。首先进行不同浓度纯氯水样与其CODCr关系的实验,得出CODCr与氯离子浓度关系为:y=0.227 4x-49.422;然后配置CODCr为100mg·L-1的标准水样,加入不同浓度氯离子进行实验,得出CODCr与氯离子浓度的关系为:y=0.227 6x+46.300;最后用某企业CODCr为249mg·L-1的实际水样加入不同浓度的氯离子进行实验,得出CODCr与氯离子的关系:y=0.227 8x+188.46。研究结果表明,采用完全氧化法测定的CODCr与水样的实际CODCr相对误差全部小于7%,能够满足环境监测质量要求。

A complete oxidation method was utilized to determine the CODcr in high chlo- ride wastewater. The relationship between pure chlorine water samples and its experi- mental CODcr was obtained, expressing as a linear relation between the CODcr and the chloride ion concentration： y=0. 227 4x-49. 422. A series of standard water samples were prepared （CODcr was 100 mg ·L-1） with different concentrations of chloride ion. The linear relation between the CODer and the chloride ion concentration was obtained as： y=0. 227 6x＋46. 300. Actual water samples （CODcrwas 249 mg · L ^-1） with differ- ent concentrations of chloride ion were tested. The result showed that the linear relation between the CODcr and the chloride ion concentration was： y=0. 227 8x＋188. 460. The final results showed that all of the relative errors between the CODer determined by com- plete oxidation and the actual CODer of water samples were less than 7%, which met the quality requirement of environmental monitoring.