热改性铝污泥吸附除磷的动力学和热力学研究  

Kinetics and thermodynamics of phosphate removal by heat modified alum sludge

作　　者：耿雅妮[1,2] 任雪盈 巨龙[2] 张军[1,3] 邢孟[2] GENG Ya-ni;REN Xue-ying;JU Long;ZHANG Jun;XING Meng(Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,Baoji University of Arts and Sciences,Baoji 721013,China;College of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education,Chang＇ an University,Xi＇ an 710064,China)

机构地区：[1]宝鸡文理学院陕西省灾害监测与机理模拟重点实验室,陕西宝鸡721013 [2]宝鸡文理学院地理与环境学院,陕西宝鸡721013 [3]长安大学旱区地下水文与生态效应教育部重点实验室,陕西西安710064

出　　处：《应用化工》2018年第7期1377-1381,共5页Applied Chemical Industry

基　　金：教育部旱区地下水文及生态效应重点实验室开放基金(310829151140;310829151141);陕西省教育厅自然科学基金项目(15JK1026);宝鸡文理学院校级重点项目(ZK2017007);地理学陕西省重点学科资助

摘　　要：考察了热改性颗粒铝污泥吸附剂(ASGA)对水中磷的吸附动力学和热力学行为。结果表明,Langmuir方程能较好地拟合ASGA对磷的等温吸附特征(R2=0.998);准一级动力学能较好地反映动力学特征(R2=0.993);热力学ΔG为负值,表明该反应是自发进行的;ASGA对磷的吸附机理主要是配位体交换,类型为单分子层化学吸附,在一定温度内,升高温度有利于吸附反应的进行。Batch experiments were used to investigate the kinetics and thermodynamics of phosphorus adsorption onto Alum sludge granular adsorbent（ ASGA）. The results show,Langmuir equation can well fit the isothermal adsorption characteristic of ASGA in adsorption isotherm experiment（ R2= 0. 998）. In the experiments of adsorption kinetics,Lagergren Pseudo-first-order kinetics can well reflect the dynamic characteristics（ R2= 0. 993）. ΔG0 is negative,indicating that the reaction is carried out spontaneously.The adsorption mechanism of ASGA on phosphate was ligand exchange and precipitation. The type of adsorption is monomolecular adsorption. Increasing the temperature is beneficial to the adsorption reaction in a certain range.

关 键 词：热改性铝污泥 除磷 吸附等温线 动力学 热力学 

分 类 号：X703.1[环境科学与工程—环境工程] TQ09[化学工程]