reparation of disinfectant containing both chlorine dioxide and chlorine for safe urban reuse

樊金红

doi:10.3969/j.issn.0438-1157.2012.02.034

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reparation of disinfectant containing both chlorine dioxide and chlorine for safe urban reuse

更新时间：2025-12-10

- reparation of disinfectant containing both chlorine dioxide and chlorine for safe urban reuse
- CIESC Journal Issue 2, Pages: 578-583(2012)
- 作者机构：
  
  同济大学城市污染控制国家工程研究中心,上海
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2012.02.034
  CLC： 646TQ085.4
- Online First：05 February 2012，
  
  Published：05 February 2012
- 稿件说明：
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樊金红. reparation of disinfectant containing both chlorine dioxide and chlorine for safe urban reuse[J]. CIESC Journal, 2012, (2): 578-583.
DOI：

樊金红. reparation of disinfectant containing both chlorine dioxide and chlorine for safe urban reuse[J]. CIESC Journal, 2012, (2): 578-583. DOI： 10.3969/j.issn.0438-1157.2012.02.034.

摘要

在酸性环境中通过NaCl电解协同NaClO2化学氧化方法制备的复合二氧化氯溶液中ClO2和自由氯浓度分别达到70%和20%左右，系统地研究了电流密度(A)、NaClO2与NaCl质量比(B)、电解时间(C)对复合溶液中组分浓度和质量百分数的影响，并将复合溶液用于城市污水二级处理出水的消毒。结果表明，复合溶液中自由氯的浓度主要受因素C和A的影响，ClO2的浓度主要受因素C和B的影响，而A对副产物ClO2-和ClO3-的影响最大。总大肠菌群数在105~108个.L-1的城市污水二级处理出水采用复合溶液消毒时，当其中ClO2投加量为4 mg/.L-1，自由氯含量不低于1.20mg.L-1，经30min接触后出水生物学指标满足GB/ T18920-2002 的要求。既降低了消毒剂的使用量，又减少了消毒副产物ClO2-的生成。

Abstract

Combinations of chlorine dioxide and chlorine by mechanically mixing are finding potential applications in drinking water and urban reuse disinfection to achieve maximum disinfection and minimum toxicity simultaneously. However

transportation and reservation of chlorine dioxide and chlorine may threat to environmental safety. Therefore

site preparation methods are necessary for field use. At present

preparation methods of associated chlorine dioxide-free chlorine disinfectant include chemical reduction of sodium chlorate and electrolysis of sodium chloride. And the content of chlorine dioxide is usually below 30%. To extend the preparation method of associated chlorine dioxide-free chlorine disinfectant

the electrolysis of sodium chloride (NaCl) was followed by chemical oxidation of sodium chlorite(NaClO2) with membrane-free plate electrode reactor. The content of ClO2 in the compound disinfectants can be controlled. The effect of current density(A)

mass ratio of NaClO2:NaCl(B)

electrolysis time(C) on concentration and mass percentage of ClO2

free chlorine

ClO2- and ClO3- was investigated systematically. With the current density of 41.67~83.33A.m-2，mass ratio of NaClO2 and NaCl at 1:3~3:3，reaction time at 5~15min

the mass percentage of chlorine dioxide(ClO2) and free chlorine reached 70% and 20% in the compound solution. The free chlorine yield was mainly affected by factors C and A

the ClO2 was significantly influenced by factors C and B

and the by-products of ClO2- and ClO3- were greatly impacted by factor A. The total coliforms of urban sewage reached 105 ~ 108 cfu.L-1 after secondary treatment and before disinfection. The disinfected effluent after 30min contact time with ClO2 dosage of 4mg.L-1 and free chlorine of 1.20mg.L-1 above

complied with water quality standard for urban miscellaneous consumption GB / T18920-2002. In addition

the use of disinfectants was reduced

as well as the generation of ClO2-. Some fundamental insights into the preparation of associated chlorine dioxide-free chlorine disinfectants support its further application in safe urban reuse.

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