粉煤灰对模拟河流中DMP的吸附实验研究  

Study on removal efficiency of fly ash to DMP in simulated river

作　　者：李萌 陈爱侠[1,2] 陈贝[3] 胡卫星[1,2] 孟建昊 韩融 LI Meng;CHEN Ai-xia;CHEN Bei;HU Wei-xing;MENG Jian-hao;HAN Rong(School of Environmental Science and Engineering,Chang’an University,Xi’an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Ducation,Xi’an 710054,China;Chang’an University Haiwei Environmental Technology Company,Xi’an 710054,China)

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]旱区地下水文与生态效应教育部重点实验室,陕西西安710054 [3]长安大学海威环境技术公司,陕西西安710054

出　　处：《应用化工》2019年第2期258-261,266,共5页Applied Chemical Industry

基　　金：国家自然科学基金青年基金资助项目(21407012);陕西省自然科学基金基础研究计划项目(2015JQ5178)

摘　　要：以邻苯二甲酸二甲酯(DMP)为研究对象,以粉煤灰作为吸附剂,有机玻璃反应槽作为反应装置,向其持续注入初始浓度相同的DMP溶液,并对该反应进行吸附动力学方程拟合;同时,分析了DMP初始浓度、水流速度及吸附剂投加方式3种因素对粉煤灰去除DMP效率的影响。结果表明:①Elovich方程能较好地拟合粉煤灰对DMP的吸附行为;②随着水流速度的增加,粉煤灰对DMP的去除率升高,吸附量增加,在水流速度为0.42 m/s时,粉煤灰对DMP的最大吸附量为27.50μg/g;③溶液的初始浓度越小,投加相同质量的粉煤灰,其上可供吸附的活性点位比例越高,去除率升高。但是污染液之间的传质推动力减小,相同时间的吸附量会降低;④将粉煤灰全部平铺在槽子底部时,粉煤灰与DMP之间的接触面积最大,吸附速率增大,去除率升高,最高可达69.38%。Dimethyl phthalate(DMP)was used to investigate the river pollution caused by pollutant leakage,with fly ash as the adsorbent and plexiglass reaction tank as the reaction device,DMP solution with the same initial concentration was injected into the reaction tank,and the adsorption kinetic equation was used to fit this reaction results.Moreover,the relations between the DMP initial concentration,water flow rate and adsorbent dosing method and removal efficiency of DMP on fly ash were analyzed.The results showed that the Elovich equation was more precise to fit the adsorption behavior of DMP on fly ash.The removal rate of DMP on fly ash and the adsorption amount increased with the water flow rate increasing,and the adsorption capacity of DMP on fly ash reached a maximum 27.50μg/g when the velocity was 0.42 m/s.Adding the same mass of fly ash,the initial concentration of the solution was smaller and the higher percent of the activesite on adsorption and removal rate.However,the mass transfer driving force between the DMP molecules was reduced,the adsorption amount was reduced at the same time.Furthermore,the largest contact area between the fly ash and DMP was achieved with the fly ash lying on the bottom of the tank completely,the adsorption and removal rate was improved consequently,and 69.38%maximum removal rate was realized.

关 键 词：邻苯二甲酸二甲酯 模拟河流 粉煤灰 吸附 

分 类 号：TQ53[化学工程—煤化学工程] X522[环境科学与工程—环境工程]