Li Cong, Luo Feng, Dong Feilong, Zhao Jingguo, Zhang Tuqiao, He Guilin, Cizmas Leslie, Sharma Virender K
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China.
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China.
Chemosphere. 2017 Nov;187:413-420. doi: 10.1016/j.chemosphere.2017.08.084. Epub 2017 Aug 19.
This paper presents the effect of preoxidation with ferrate(VI) (FeO, Fe(VI)) prior to chlorination on chlorine decay and formation of disinfection by-products in filtered raw water from a full-scale drinking water treatment plant. The rate of chlorine decay became significantly faster as the concentration of ferrate(VI) increased. Chlorine degradation followed two first-order decay reactions with rate constants k and k for fast and slow decay, respectively. Kinetic modeling established the relationships between k and k and varying dosages of chlorine and ferrate(VI). When ferrate(VI) was used as a pre-oxidant, the levels of trihalomethanes (trichloromethane (TCM), dichlorobromomethane (DCBM), dibromochloromethane (DBCM), and tribromomethane (TBM)) in water samples decreased as the ferrate(VI) concentration increased. The concentrations of these trihalomethanes followed the order TCM > DCBM ≈ DBCM > TBM.
本文介绍了在全尺寸饮用水处理厂的过滤原水中，在氯化之前用高铁酸盐（VI）（FeO，Fe（VI））进行预氧化对氯衰减和消毒副产物形成的影响。随着高铁酸盐（VI）浓度的增加，氯衰减速率显著加快。氯的降解遵循两个一级衰减反应，快速衰减和慢速衰减的速率常数分别为k和k。动力学模型建立了k和k与不同剂量的氯和高铁酸盐（VI）之间的关系。当使用高铁酸盐（VI）作为预氧化剂时，水样中三卤甲烷（三氯甲烷（TCM）、二氯溴甲烷（DCBM）、二溴氯甲烷（DBCM）和三溴甲烷（TBM））的含量随着高铁酸盐（VI）浓度的增加而降低。这些三卤甲烷的浓度顺序为TCM > DCBM ≈ DBCM > TBM。
