硅藻土对水中微囊藻毒素的吸附性能研究

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英文篇名：Adsorption performance of diotomite to MC-LR in water 作者：郑西强 ; 刘群 ; 匡武 英文作者：Zheng Xiqiang;Liu Qun;Kuang Wu;Key Laboratory of Wastewater Treatment Technology in Anhui Province,Anhui Academy of Environmental Sciences Research;College of Environment, Hohai University;Basis Experimental Center, Anhui Sanlian University; 关键词：硅藻土 ; 微囊藻毒素 ; 吸附等温线 ; 吸附量 ; 动力学 英文关键词：Diatomite;;MC-LR;;Adsorption isotherm;;Adsorbing capacity;;Kinetics 中文刊名：给水排水 英文刊名：Water & Wastewater Engineering 机构：安徽省环境科学研究院安徽省污水处理技术研究重点实验室;河海大学环境学院;安徽三联学院基础实验教学中心; 出版日期：2019-03-10 出版单位：给水排水 年：2019 期：03 基金：国家水体污染控制与治理科技重大专项(2012ZX07103-003,2015ZX07204-007) 语种：中文; 页：21-26 页数：6 CN：11-4972/TU ISSN：1002-8471 分类号：X524

摘要

富营养化是我国湖库面临的共性问题,藻类水华造成的藻毒素污染严重威胁到湖库型饮用水水源地的供水安全。选择硅藻土吸附去除水中微囊藻毒素(MC-LR),研究其吸附性能及稳定性。结果表明,硅藻土对水中微囊藻毒素(MC-LR)的平衡吸附量随着温度的升高而增大,最大能达到4.4μg/g,相同温度下,平衡吸附量随微囊藻毒素(MC-LR)起始浓度的增加而增加。硅藻土对微囊藻毒素(MC-LR)的吸附符合Langmuir等温吸附模型。吸附过程较符合一级速率方程,反应速率由多种因素共同控制。选择典型湖库自然水体,验证硅藻土对微囊藻毒素的吸附性能,1 h内可将微囊藻毒素(MC-LR)浓度降至1.0μg/L以下。通过对示范工程进出水跟踪监测,进一步验证了硅藻土对自然水体中微囊藻毒素具有良好的去除效果。
        Eutrophication is a common problem in China,algal blooms cause algal toxin pollution is a serious threat to lake of drinking water safety. Diatomite was used to absorb MC-LR in water,the thermodynamics and dynamic characteristics were researched.The results showed that the equilibrium adsorption of diatomite significantly increased along with the increasing initial concentration of MC-LR at the same temperature,and which went up with the rising temperature, the maximum adsorption was 4.4 μg/g. The absorption capacity of diatomite for MC-LR was in accordance with Langmuir isothermal adsorption model at different temperatures.Kinetic studies showed that this process fits the first-degree reaction dynamic equation.The adsorption reaction rate was affected by particles internal diffusion and liquid membrane diffusion and so on.Selected the Chaohu Lake natural water for test,the microcystin algae toxins(MC-LR) concentrations reduced to less than 1.0 μg/L by diatomite in one hour,and it had well removal efficiency and stability.

引文

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