[1]周乙新,王月红,蒋丹萍,等.城镇污水处理厂出水游离余氯三种检测方法比对[J].中国给水排水,2021,37(18):148.
　ZHOU Yi-xin,WANG Yue-hong,JIANG Dan-ping,et al.Comparison of Three Detection Methods for Free Residual Chlorine in the Effluent of Urban Sewage Treatment Plant[J].China Water & Wastewater,2021,37(18):148.
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城镇污水处理厂出水游离余氯三种检测方法比对

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第18期 页码: 148 栏目: 出版日期: 2021-09-17
Title:
Comparison of Three Detection Methods for Free Residual Chlorine in the Effluent of Urban Sewage Treatment Plant
作者:
周乙新1，王月红2，蒋丹萍2，谈振娇2，王慕2，陈江杰2，唐中亚3
(1.无锡市市政公用产业集团有限公司，江苏无锡214001；2.无锡市政公用环境检测研究院有限公司，江苏无锡210424；3.扬州市给排水管理处，江苏扬州225000)
Author(s):
ZHOU Yi-xin1,WANG Yue-hong2,JIANG Dan-ping2,TAN Zhen-jiao2,WANG Mu2,CHEN Jiang-jie2,TANG Zhong-ya3
(1. Wuxi Public Utilities Industrial Group Co. Ltd., Wuxi 214001, China; 2. Wuxi Public Utilities Environment Testing Research Institute Co. Ltd., Wuxi 210424, China; 3. Yangzhou Water Supply and Drainage Management Office, Yangzhou 225000, China)
关键词:
城镇污水处理厂出水; 游离余氯; 检测
Keywords:
effluent of sewage treatment plant; free residual chlorine; determination
摘要:
城镇污水处理厂出水由于其基质的复杂性，在进行余氯检测时容易因杂质干扰或操作方法不当而导致检测结果不稳定。针对上述问题，采用3种均适用于污水处理厂出水游离余氯的检测方法——分光光度法、滴定法和现场仪器法，对城镇污水处理厂出水的游离余氯进行检测，比较3种方法对水样的适用性。研究发现，分光光度法的检测结果明显高于现场仪器法和滴定法检测结果。对样品反应时间、标准曲线线性范围、检测步骤、操作细节等的进一步研究结果表明，分光光度法最高定量检测浓度是1.50 mg/L；对于标准溶液而言，可按照标准中所描述的在60 min内完成比色，但实际上对于污水处理厂出水等复杂样品，于接近60 min时完成比色分析，其检测结果可能会偏高，因此建议在实际检测时应根据样品性质确定反应时间。
Abstract:
Due to the complexity of the influent, the detection of residual chlorine in effluent of urban sewage treatment plant is easy to be disturbed by impurities or improper detection method, which leads to instability of the detection results. In view of the above problems, free residual chlorine in the effluent of a sewage treatment plant was detected by spectrophotometric method, titration method and field instrument method, and the applicability of the three methods to water samples was compared. It was found that the test results of spectrophotometric method were significantly higher than those of field instrument and titration methods. Reaction time, linear range, experimental steps and operational details of spectrophotometric method were explored, and it was found that the upper limit of the method was 1.50 mg/L. For standard solutions, colorimetry could be completed within 60 minutes as described in the standard. However, colorimetric analysis could be completed near 60 minutes for complex samples such as effluent from sewage treatment plants, and the results might be higher. Therefore, it was suggested that reaction time should be determined according to the characteristics of the sample.
更新日期/Last Update: 2021-09-17