Removal of Microcystin-LR in Water by Chlorine Dioxide  

作　　者：季颖 黄君礼 付娇 吴明松 苏立强 崔崇威 

机构地区：[1]School of Municipal and Environmental Engineering,Harbin Institute of Technology [2]School of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar

出　　处：《Journal of Donghua University(English Edition)》2007年第6期734-739,共6页东华大学学报（英文版）

基　　金：the National Nature Science Foundation of China(No.50178022);the National863Projects(No.2006AA06Z309)

摘　　要：Microcystins （ MCs ） are well known as hepatotoxins produced by blooms of toxic cyanobacteria （blue-green algae） abundant in surface water used as drinking water resource and have drawn attention of environmentalists world over by leading to adverse health effects. A study on efficiency and reaction kinetics of microcystin-LR （ MC-LR ） degradation by CIO2 was performed. Experimental results indicated that MC-LR was removed by CIO2 effectively and the residual concentration of MC-LR could meet the national guideline（GB5749 - 2006） （1.0 μg · L^-1）, the efficiency of removal was in positive correlation to CIO2 dosage and reaction time and in negative correlation to initial concentration of MC-LR and pH value, whereas it was affected by temperature slightly. CIO2 dosage was the most important reaction factor on base of the orthogonal test results. The reaction was second order overall and first order with respect to both CIO2 and MC- LR, and had an activation energy of 78.81 kJ · mo1^-1 . The reaction rate constant was 4.74× 10-^2 L/（mol · min） at 10 ℃. Therefore, oxidation of CIO~ could be taken as an effective technology for removing MC-LR from drinking water resources in traditional drinking water supplies.Microcystins(MCs)are well known as hepatotoxins produced by blooms of toxic cyanobacteria(blue-green algae)abundant in surface water used as drinking water resource and have drawn attention of environmentalists world over by leading to adverse health effects.A study on efficiency and reaction kinetics of microcystin-LR(MC-LR)degradation by ClO2 was performed.Experimental results indicated that MC-LR was removed by ClO2 effectively and the residual concentration of MC-LR could meet the national guideline(GB5749-2006)(1.0 μg·L-1),the efficiency of removal was in positive correlation to ClO2 dosage and reaction time and in negative correlation to initial concentration of MC-LR and pH value,whereas it was affected by temperature slightly.ClO2 dosage was the most important reaction factor on base of the orthogonal test results.The reaction was second order overall and first order with respect to both ClO2 and MC-LR,and had an activation energy of 78.81 kJ·mol-1.The reaction rate constant was 4.74×102 L/(mol·min)at 10℃.Therefore,oxidation of ClO2 could be taken as an effective technology for removing MC-LR from drinking water resources in traditional drinking water supplies.

关 键 词：CLO2 MICROCYSTIN-LR the efficiency of removal reaction kinetics 

分 类 号：X703.1[环境科学与工程—环境工程]