不同钙源纳米零价铁-羟基磷灰石复合材料的制备及其对Mn(Ⅱ)的吸附性能  

Preparation of Nanoscale Zero-Valent Iron-Hydroxyapatite Nanocomposites with Different Calcium Sources and Their Adsorption Properties for Mn(Ⅱ)

作　　者：李蒨旻 张卫民[1,2] 陈家鸿 卢琪愿 LI Qianmin;ZHANG Weimin;CHEN Jiahong;LU Qiyuan(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,南昌330013 [2]东华理工大学水资源与环境工程学院,南昌330013

出　　处：《有色金属（冶炼部分）》2023年第10期126-137,共12页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省自然科学基金资助项目(20202BABL204069);核资源与环境国家重点实验室自主基金资助项目(2020Z06)。

摘　　要：通过液相还原法制备了两种不同钙源的纳米零价铁-羟基磷灰石复合材料(N-FH和C-FH)。通过静态批试验,研究了溶液pH、反应时间、初始锰浓度、反应温度等因素对N-FH和C-FH吸附水中Mn(Ⅱ)的影响,对复合材料吸附前后的微观形貌进行表征,并借助动力学模型分析其吸附机理。结果表明,在复合材料投加量0.125 g/L、初始锰浓度10 mg/L、溶液pH为5.0、反应时间720 min的条件下,N-FH和C-FH吸附水中Mn(Ⅱ)的最大吸附量分别为59.679 2、59.290 4 mg/g。N-FH和C-FH对Mn(Ⅱ)吸附过程更符合准二级动力学模型(R2>0.99)和Langmuir模型(R2>0.98),吸附机理皆为单层化学吸附。Two nanoscale zero-valent iron-hydroxyapatite nanocomposites(N-FH and C-FH)with different calcium sources were prepared by liquid-phase reduction method.Through static batch experiments,the effects of solution pH value,reaction time,initial manganese concentration,and reaction temperature on the performance of N-FH and C-FH adsorption of Mn(Ⅱ)in water were studied.Combined with microscopic characterization of composite material before and after adsorption,and the adsorption mechanism was further analyzed by adsorption kinetic model.The results show that the maximum adsorption capacity of Mn(Ⅱ)adsorbed in water by N-FH and C-FH is 59.6792 mg g and 59.2904 mg g respectively under the conditions including 0.125 g L of composite material,initial manganese concentration of 10 mg L,pH value of the solution to be set to 5.0,and reaction time of 720 min.The adsorption process of Mn(Ⅱ)by N-FH and C-FH is more consistent with the quasi-second-order kinetic model(R 2>0.99)and Langmuir model(R 2>0.98),and the adsorption mechanism is monolayer chemical adsorption.

关 键 词：纳米零价铁(nZVI) 羟基磷灰石(HAP) 锰 吸附机理 动力学 

分 类 号：X52[环境科学与工程—环境工程]