Mn-Al双金属氢氧化物的制备及其除氟性能  

Preparation of Mn-Al Double Hydroxide Adsorbent and Its Application to Fluoride Adsorption

作　　者：胡家朋[1,2,3] 吴代赦[1] 饶瑞晔[2,3] 陈喆[2,3] 赖文亮 

机构地区：[1]南昌大学环境与化学工程学院,南昌330031 [2]武夷学院生态与资源工程学院,武夷山354300 [3]武夷学院绿色化工技术福建省高等学校重点实验室,武夷山354300 [4]大仁科技大学环境管理研究所

出　　处：《材料导报》2015年第2期15-20,共6页Materials Reports

基　　金：国家自然科学基金(40601004);福建省教育厅资助项目(JA11262);南平市科技局项目(N2012Z06);武夷学院青年专项科研基金(XQ201020);福建省区域科技重大项目(2012Y3008)

摘　　要：采用共沉淀法制备Mn-Al双金属氢氧化物吸附剂,优化了合成条件,并利用扫描电子显微镜(Scanning electron microscope,SEM)及能谱分析仪(Energy dispersive spectrometer,EDS)、X射线衍射仪(X-ray diffraction,XRD)、热重分析仪(Thermogravimetric analyzer,TGA)、比表面积分析仪(Brunauer-Emmett-Teller surface area,BET)等对吸附材料进行表征探讨。研究结果表明pH值和共存离子等因素对Mn-Al双金属氢氧化物吸附剂除氟效能有一定的影响,在pH为6时,达到最大吸附容量,为44.15mg·g-1,氯离子和硝酸根离子能够提高吸附剂除氟效率,磷酸根离子与氟离子有一定的竞争吸附。A novel adsorbent of Mn-Al double hydroxide for removing fluoride was prepared using coprecipitation method according to the optimal preparation conducted by this experiment.The prepared adsorbent was characterized by scanning electron microscope（SEM）,energy dispersive spectrometer（EDS）,X-ray diffraction（XRD）,thermogravimetric analyzer（TGA）,Brunauer-Emmett-Teller surface area（BET）.Based on current results,it reveals that the adsorbent belongs to amorphous structure with part of aggregated nanoparticles.According to the effect of pH value and competitive anions on defluoridation by Mn-Al adsorbent,the maximum fluoride adsorption capacity of Mn-Al adsorbent is 44.15mg·g^-1 while pH value is controlled at 6.The presence of chloride and nitrate ions could enhance the removal of fluoride by Mn-Al adsorbent while phosphate ion acts oppositely.

关 键 词：Mn-Al双金属氢氧化物 除氟 吸附 表征 

分 类 号：X703.1[环境科学与工程—环境工程]