摘要
研究高铁酸盐对悦目颤藻 (Oscillatoriaamoena)肝毒素 (Microcystin LR)的降解效能及其与pH的关系 .结果表明 ,处理有机质含量很高的藻类肝毒素粗提液 ,当高铁投加量增到 4 0mg/L ,pH控制在 6～ 1 0 ,肝毒素几乎被完全降解 .同时高铁的还原产物Fe3+ 、Fe(OH) 3 发挥其助凝、絮凝的作用 ,对水体中有机质吸附沉降去除 ,TOC去除率达到 5 0 %左右 ,铁几乎无残留 .高效液相色谱分析发现 ,作用机制可能是高铁氧化或异构化Adda基团的共轭双键 ,使Adda基团的结构发生变化 。
In this study, the effect of ferrate oxidation on stability of microcystins LR (MCLR) in freeze dried Oscillatoria amoena was investigated. The toxin was easily decomposed by oxidation with ferrate, and the stability depended on the dosage of ferrate and pH. Simultaneously the product Fe(OH) 3 after ferrate oxidation could flocculate the organic compounds so that 50% TOC removal of the extract was reached. The low residual iron reflected the excellent results of coagulation and could meet the standard of drinking water. The results show that ferrate oxidation may be an effective and practical method for the removal of cyanobacterial peptide toxins from drinking water.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第2期96-99,共4页
Environmental Science
基金
国家自然科学基金资助项目 (2 0 0 770 31)
中科院研究生科学与社会实践项目
关键词
悦目颤藻
藻类肝毒素
高铁
氧化絮凝
Oscillatoria amoena
microcystin LR
ferrate
oxidation
