化学絮凝-分光光度法用于焦化废水中氰化物的检测  

Determination of Cyanide in Coking Wastewater by Chemical Flocculation and Spectrophotometry

作　　者：李红岩[1] 郑蓓[1] 李春甫 陈星 高迎新[1,3] 郑佳乐[1] LI Hong-yan;ZHENG Bei;LI Chun-fu;CHEN Xing;GAO Ying-xin;ZHENG Jia-le(Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Science,Chinese Academy of Sciences,Beijing 100085,China;Institute of Industrial Equipment and Technology,Hefei University of Technology,Hefei 230009,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院生态环境研究中心饮用水科学与技术重点实验室,北京100085 [2]合肥工业大学工业装备与技术研究院,安徽合肥230009 [3]中国科学院大学,北京100049

出　　处：《中国给水排水》2020年第6期118-122,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07201005-001)。

摘　　要：建立了化学絮凝-分光光度法分析焦化废水中氰化物的新型技术,与传统蒸馏-分光光度法相比,简化了操作步骤,提高了检测灵敏度。方法验证结果表明,絮凝剂硫酸亚铁(FS)和聚合硫酸铁(PFS)复合投加可以使焦化废水中氰化物检测相对误差达到1%以内;对9个模拟水样进行检测的精密度结果为0.56%~0.98%,准确度为0.97%~2.01%,加标回收率为82.87%~99.56%;对实际水样的检测加标回收率为98.6%,均达到了分析化学要求。A new detection technique for cyanide in coking wastewater by chemical flocculation and spectrophotometry was established.The operation steps were simplified and the detection sensitivity was improved compared with traditional distillation-spectrophotometry.The results of method verification showed that the compound addition of ferrous sulfate(FS)and polymerized ferrous sulfate(PFS)which were flocculants could make the relative error of cyanide in the coking wastewater be within 1%;the precision results of the 9 simulated water samples be 0.56%-0.98%,the accuracy be 0.97%-2.01%,and the standard-added recovery rate be 82.87%-99.56%;the standard-added recovery rate of the samples tested for the actual water samples be 98.6%,all of which could reach the analytical chemistry requirements.

关 键 词：焦化废水 氰化物分光光度法 化学絮凝 

分 类 号：TU992.3[建筑科学—市政工程]