羟基磷灰石去除铅离子过程机理研究  

Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)

作　　者：徐作行 钱功明[1,2] 刘露露 刘威[1] 蔡先炎 冯俊燕 XU Zuoxing;QIAN Gongming;LIU Lulu;LIU Wei;CAI Xianyan;FENG Junyan(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉科技大学冶金矿产资源高效利用与造块湖北省重点试验室,湖北武汉430081

出　　处：《矿产保护与利用》2020年第1期37-41,共5页Conservation and Utilization of Mineral Resources

基　　金：国家科技支撑计划项目(2012BAC02B04);国家自然科学基金(51304149)。

摘　　要：研究了化学沉淀法合成的羟基磷灰石对水溶液中铅离子的吸附性能及机理。运用SEM电镜、EDS、XRD等手段对羟基磷灰石(HAP)的结构形貌进行分析。结果显示除铅的反应机理在pH=3时主要为溶解沉淀和离子交换,在pH=5时为溶解沉淀和水解沉淀。除铅效果与溶液的pH值、反应温度呈正相关,与溶液初始铅离子浓度呈负相关;pH=4时,铅离子去除率接近99%,同时水溶液中铅离子浓度可降至规定的排放标准(1 mg/L)以下。Lead ions were removed by using HAP prepared by chemical precipitation method.Morphology of Hydroxyapatite(HAP)was observed by SEM,EDS and XRD.The results showed that the reaction mechanism of lead removal was mainly precipitation and ion exchange at pH=3,and precipitation and hydrolysis at pH=5.The removal rate of lead was positively correlated with pH value and reaction temperature of the solution,negatively correlated with the initial lead ion concentration of the solution,and the reaction process was a complicated multistage reaction.When pH=4,the removal rate of lead ions is close to 99%,while the lead ions in aqueous solution drop below the prescribed emission standard(1 mg/L).

关 键 词：HAP 铅离子 机理 

分 类 号：X703[环境科学与工程—环境工程]