• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Removal of disinfection by-products precursors by polyaluminum chloride coagulation coupled with chlorination
【24h】

Removal of disinfection by-products precursors by polyaluminum chloride coagulation coupled with chlorination

机译：聚氯化铝混凝加氯去除消毒副产物前体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of coagulation coupled with chlorination (i.e., pre-, inter-, and post-chlorination) on the formation of disinfection by-products (DBPs) and the removal efficiency of DBPs precursors were investigated. Compared with coagulation coupling with pre-chlorination, coagulation coupled with inter-chlorination could lead a higher removal efficiency of dissolved organic carbon (DOC), specific ultraviolet absorbance (SUVA) and chloroacetic acids formation potential (CAAsFP). The CAAsFP/DOC value of residual DOC showed that coagulation with inter-chlorination has a beneficial effect on CAAs precursors removal. More DBPs were produced during inter-chlorination than that of pre-chlorination at pH 7.5, while less DBPs were produced during inter-chlorination than that of pre-chlorination at pH 5.5. In addition, the precipitate of humic acid (HA) after coagulation was chlorinated to study the kinetics of chlorine decay. The results showed that coagulated-HA had a higher reactivity with chlorine than aqueous-HA at pH 7.5. Furthermore, the trends of zeta potential during coagulation process suggested that the distribution of chlorine species had significant influence on the removing of DBPs precursors by coagulation coupled with chlorination.
机译：研究了混凝与氯化反应（即氯化前，氯化间和氯化后）对消毒副产物（DBPs）形成和DBPs前体去除效率的影响。与采用预氯化的混凝相比，采用混氯化的混凝可以提高溶解有机碳（DOC），比紫外线吸收率（SUVA）和氯乙酸形成潜力（CAAsFP）的去除效率。残留DOC的CAAsFP / DOC值表明，氯化间混凝对CAA前体的去除具有有益作用。在pH值为7.5时，氯化间生成的DBP比预氯化的要多，而在pH值为5.5时，氯化间生成的DBP少。此外，对凝结后的腐殖酸（HA）沉淀物进行了氯化处理，以研究氯衰减的动力学。结果表明，在pH 7.5时，凝结的HA与氯的反应性比含水的HA高。此外，在凝结过程中ζ电位的趋势表明，氯物种的分布对凝结和氯化作用对DBPs前体的去除有显着影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号