CAJ | 학술논문

采用臭氧对微囊藻毒素 - LR(MC LR)进行降解试验,研究其反应动力学.取自无锡太湖流域蓝藻藻华提取藻毒素,研究了臭氧投加量、MC LR的初始质量浓度、pH值及一些阴离子作用对降解速率的影响.结果表明,臭氧氧化能有效降解MC LR,且符合准一级动力学反应.降解速率不受MC LR初始质量浓度的影响.当臭氧投加量由0.31 mg·L-1增加到1.35 mg·L-1时,MC-LR的降解速率由0.010 3 min-1提高到0.040 7 min-1.当pH值由3.08升高到10.08时,MC-LR的降解速率由0.252 8 min-1降低到0.009 9 min-1.在酸性条件下,pH值的变化对降解速率的影响程度更大.在阴离子影响方面,NO-3有利于MC-LR的降解,CO2-3阻碍降解,SO2-4和Cl-对降解速率的影响不明显,其反应速率常数由大到小的次序是:NO-3,Cl-,SO2-4,CO2-3.
채용취양대미낭조독소 - LR(MC LR)진행강해시험,연구기반응동역학.취자무석태호류역람조조화제취조독소,연구료취양투가량、MC LR적초시질량농도、pH치급일사음리자작용대강해속솔적영향.결과표명,취양양화능유효강해MC LR,차부합준일급동역학반응.강해속솔불수MC LR초시질량농도적영향.당취양투가량유0.31 mg·L-1증가도1.35 mg·L-1시,MC-LR적강해속솔유0.010 3 min-1제고도0.040 7 min-1.당pH치유3.08승고도10.08시,MC-LR적강해속솔유0.252 8 min-1강저도0.009 9 min-1.재산성조건하,pH치적변화대강해속솔적영향정도경대.재음리자영향방면,NO-3유리우MC-LR적강해,CO2-3조애강해,SO2-4화Cl-대강해속솔적영향불명현,기반응속솔상수유대도소적차서시:NO-3,Cl-,SO2-4,CO2-3.
A study was made of the degradation of microcystin-LR (MC LR) by ozonation and its kinetics.The microcystins were extracted in cyanobacteria blooms from Taihu Lake in Wuxi,China.An investigation was also conducted on the effects of ozone dose,MC LR initial concentration,pH value and some anions.The results indicate that MC LR can be effectively degraded by ozonation and the reaction fits well with the first-order kinetics.The rate constant is invariable with different MC LR initial concentrations.However,when the dosage of ozone changes from 0.31 mg·L-1 to 1.35 mg·L-1,the rate constant increases from 0.010 3 min-1 to 0.040 7 min-1.The rate constant decreases from 0.252 8 min-1 to 0.009 9 min-1 with pH value from 3.08 to 10.08.Under acidic condition,the degradation of MC LR is more sensitive to pH value.NO3 - has positive effect on the degradation of MC-LR while CO3 2- has negative effect on it,and the effects of SO4 2- and Cl- on it are not obvious.According to their effects on the degradation rate,the four anions can be arranged as NO-3,Cl-,SO2-4,CO2-3.