微波-化学改性粉煤灰及其处理腐殖酸机理研究  

Research of the Modification of Fly Ash by Microwave and Chemical Substance and the Mechanism of Treating Humic Acid

作　　者：李磊[1,2] 王文娟[1,2] 薛森娟 徐炎华[1,2] 

机构地区：[1]南京工业大学环境学院,江苏南京210009 [2]南京工业大学江苏省工业节水减排重点实验室,江苏南京210009

出　　处：《安全与环境工程》2014年第4期69-74,79,共7页Safety and Environmental Engineering

基　　金：江苏省自然科学基金重大专项(BK2011016)

摘　　要：微波活化-化学改性方法可有效改善粉煤灰的表面结构及化学性质,提高粉煤灰吸附混凝腐殖酸的效果。本文采用微波活化-化学改性方法对粉煤灰进行处理,并通过试验研究了改性粉煤灰处理废水中腐殖酸的效果及其作用机理。试验结果表明:微波活化粉煤灰处理腐殖酸的效果优于原粉煤灰,先微波活化后化学改性粉煤灰处理腐殖酸的效果优于先化学改性后微波活化粉煤灰;在最佳处理工艺条件下,先微波活化后盐酸最优改性的粉煤灰处理腐殖酸废水时腐殖酸的去除率可达91.34%,而先微波活化后氢氧化钙最优改性的粉煤灰处理腐殖酸废水时腐殖酸的去除率更高,可达98.28%。This paper studies the effect of the adsorption and coaccgulation of humic acid by fly ash modified by microwave and chemical substance,whose surface properties are improved.Results show that the removal efficiency of humic acid is higher after fly ash is modified by microwave activation.The removal rate of humic acid with fly ash primarily modified by microwave activation and then by chemical substance is higher than the removal rate of humic acid with fly ash primarily modified by chemical substance and then by microwave activation.The removal rate of humic acid with fly ash modified under the sequence of microwave activation and hydrochloric acid and under the optimum technological conditions for the treatment of humic acid wastewater can reach 91.34%,and the removal rate of humic acid with fly ash modified under the sequence of microwave activation and Ca（OH）2and under the optimum technological conditions for the treatment of humic acid wastewater can reach 98.28%.

关 键 词：粉煤灰 微波活化 盐酸改性 氢氧化钙改性 腐殖酸 

分 类 号：X773[环境科学与工程—环境工程]