摘要
研究水上介质阻挡放电等离子体对微囊藻毒素-LR(MC-LR)的去除及其反应动力学。在室温和常压下,考察了峰值电压、初始电导率、溶液初始浓度和pH对降解率影响。结果表明,水上介质阻挡放电等离子体降解MC-LR的过程均符合一级反应动力学。随着峰值电压的升高,MC-LR的降解率升高。高的溶液初始电导率和初始浓度不利于放电等离子体MC-LR的去除,反应过程中溶液的电导率增长速率与毒素降解速率呈现正相关性;pH在酸性和碱性条件下更有利于毒素的去除,反应20min后溶液pH均会下降到3左右,H+浓度直线上升;初始浓度为26.16μg/L的MC-LR经过100min的处理之后降解到0.23μg/L,去除率达到99.35%,低于国家《生活饮用水卫生标准》(GB5749～2006)限值1μg/L。
This paper studied the removal of mieroeystin- LR （MC- LR） in aqueous solution by dielectric barrier discharge over water （DBDow） and its reaction kinetics. Influencing factors on the MC- LR removal efficiency, such as supporting peak voltage, MC- LR initial concentration, pH, and the electrical conductivity, were evaluated under atmospheric pressure and room temperature. The results showed that the MC- LR removal process by DBDow matched the first stage reaction kinetics. With the increase of peak voltage, the degrading rate of MC - LR would also increase. High initial electrical conductivity and solution of solution would hinder the removal of MC- LR, and the increasing rate of electrical conductivity in solution was in positive correlative property with the toxin degrading rate; acid condition was prefer to alkaline condition for toxin removal, the pH would decreased to about 3 and the H^＋ concentration would increase linearly after 20 minutes of reaction; initial MC- LR concentration of 26. 16 μg/L would decrease to 0. 23 μg/L after 100 minutes of treatment, the removal rate could reach 99.35% which was lower than the ＂ Standards for drinking water quality（GB 5749-2006）＂ of 1μg/L.
出处
《给水排水》
CSCD
北大核心
2011年第11期122-127,共6页
Water & Wastewater Engineering
基金
广西科技攻关项目(桂科攻10142003)
