基于氧化石墨烯混凝的消毒副产物控制及其机制研究

项目名称： 基于氧化石墨烯混凝的消毒副产物控制及其机制研究

项目编号： No.51508077

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 其他

项目作者： 杨武

作者单位： 东北师范大学

项目金额： 20万元

中文摘要： 本项目针对常规金属盐类混凝剂对消毒副产物前体物去除效率较低的问题，拟选用新型碳基材料——氧化石墨烯（GO）作为混凝剂，以期改善及提高混凝工艺对水中消毒副产物前体物的去除效果。拟通过研究GO混凝过程中絮体粒径变化、絮体强度、絮体分形维数、电荷特性等明确GO混凝特性；以TOC、浊度、UV254等为指标，研究不同条件（温度、pH、二价阳离子浓度、静沉时间、搅拌强度等）下的混凝效果，掌握影响GO混凝的主要因素；通过分子量分布、亲疏水性变化、三维荧光光谱分析等手段分析GO混凝对有机物的去除机制；以三卤甲烷、卤乙酸、卤代酮、三氯硝基甲烷、卤乙腈、亚硝基二甲胺等副产物生成潜能来衡量GO混凝对消毒副产物前体物的控制效果。在上述基础上，分别选用聚合氯化铝、聚合硫酸铁、硅藻土等与GO联用，考察联合作用下的有机物去除特征、影响因素、消毒副产物控制效果。

中文关键词： 氧化石墨烯；消毒副产物；消毒副产物前驱物；混凝

英文摘要： In order to solve the problem that conventional metal salts coagulants cannot remove disinfection byproduct precursor efficiently, graphene oxide (GO ) was selected as a new coagulant to improve the DBPs control efficiency by coagulation in this project. .The GO coagulation characteristics and its mechanism will be clarified by observing the change of floc particle size, strength, fractal dimension and charge characteristics. The TOC, UV254，turbidity will be selected as the index to evaluate the coagulation efficiency under different conditions (e.g. temperature, pH, concentration of divalent cations, settling time, stirring intensity). Factors that affect GO coagulation efficiency will be also analyzed. The mechanism of organics removal by GO coagulation will be explained by analyzing the changes of the distribution of the apparent molecular weight, hydrophility, three-dimensional fluorescence, etc. The DBPs control efficiency will be evaluated by measuring the formation potential of trihalomethanes, haloacetic acids, haloketones, chloropicrin, haloacetonitriles, nitrosodimethylamine, etc. Also the combination of GO/PAC, GO/PFS, GO/ diatomite will be used as composite coagulant to evaluate the coagulation characteristics, mechanism, affecting factors, DBPs control efficiency.

英文关键词： graphene oxide;disinfection byproduct;disinfection byproduct precursor;coagulation