Heterogeneous Fenton Photodegradation of Microcystin-LR with Visible Light Irradiation

被引：17
作者：
Fang Yan-Fen [1 ,2 ]
Chen Deng-Xia [3 ]
Huang Ying-Ping [3 ]
Yang Jing [3 ]
Chen Gen-Wei [1 ]
机构：
[1] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
[3] China Three Gorges Univ, Minist Educ, China Engn Res Ctr Ecoenvironm Gorges Reservoir R, Yichang 443002, Peoples R China
来源：
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY | 2011年 / 39卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Heterogeneous; Microcystin-LR; Fey Catalyst; Degradation mechanism; PHOTOCATALYTIC DEGRADATION; CATALYST; RAT;
D O I：
10.1016/S1872-2040(10)60433-1
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Under the condition of visible light irradiation (lambda>450 nm), the degradation mechanism of microcystin-LR was studied using H2O2 and FeY catalyst, which is prepared by means of loading Fe2+ to the molecular sieve NaY. The results indicate that the degradation rate of microcystin-LR is up to 90% in the wide pH range using Vis/FeY/H2O2 system. Based on the intermediates detected by LC-MS analysis, the possible pathways and three vulnerable oxidation sites are put forward: (1) the conjugated double bonds of the Adda chain, (2) the methoxy group of the Adda chain, (3) unsaturated double bond of the Mdha chain. FeY catalyst is of good stability, having catalytic activity after 5 times repetition, which indicates its potential application to the control of the alga wastewater.
引用
收藏
页码：540 / 543
页数：4
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