摘要
该文探讨了3种氧化剂（臭氧、高锰酸钾和次氯酸钠）对微囊藻毒素-LR（MC-LR）的降解效果，并研究了氧化剂处理铜绿微囊藻过程中对MC—LR的释放及其降解特性。结果表明3种氧化剂均可有效降解MC—LR。氧化处理铜绿微囊藻时，在臭氧投加速率为0．41mg／L·min、氧化反应5min和高锰酸钾投加量为2mg／L、氧化反应5—8min的条件下，均可将水中的MC—LR去除完全；此外，3种氧化剂处理含藻水的同时，可引起胞内藻毒素不同程度的释放，其中次氯酸钠处理含藻水将严重破坏藻细胞，致使产生大量的、常规水处理工艺无法有效去除的胞外溶解性MC—LR，导致饮用水水质存在安全隐患。
The degradation of microcystin-LR by three different kinds of chemical oxidants （ozone, potassium permanganate and sodium hypochlorite） was discussed in this paper. Meanwhile, both effects of oxidants on release and degradation characteristics of microcystin-LR were also elaborated in algae removal process. The results show that three kinds of oxidants can effectively remove microcystin-LR. When ozone feed rate is 0.41 mg/L· min and reaction time is 5 min or when dosage of potassium permanganate is 2 mg/L and reaction time is 5 ~ 8 min during the oxidation treatment process of microcystis aeruginosa, microcystin-LR in water can be completely removed. In addition, when three kinds of oxidants treat water containing algae, a certain amount of intracellular microcystins releases into the water, and sodium hypochlorite can seriously damage the cells of algae, resulting in generating a large amount of extracellular dissolved microcystin-LR that is removed ineffectively by conventional water treatment processes and causes security risks of drinking water.
出处
《净水技术》
CAS
2015年第5期60-63,75,共5页
Water Purification Technology
基金
国家水体污染控制与治理科技重大专项课题(2012ZX07403-001)
