ZnAl-LDH/Al(OH)_(3)复合材料的制备及其对废水中Pb^(2+)的去除性能  

Fabrication of ZnAl-LDH/Al(OH)_(3)composite and its Pb^(2+) removal property from wastewater

作　　者：赵鹤翔 李明昕 王艳[3] 张继国 郭元茹[1] 潘清江[2] ZHAO Hexiang;LI Mingxin;WANG Yan;ZHANG Jiguo;GUO Yuanru;PAN Qingjiang(Key Laboratory of Bio-based Material Science&Technology,Ministry of Education,College of Material Science and Engineering,Northeast Forestry University,Harbin 150040,China;Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China;Harbin Center for Disease Control and Prevention(Harbin Center for Health Examination),Harbin 150056,China)

机构地区：[1]东北林业大学,材料科学与工程学院,生物质材料科学与技术教育部重点实验室,哈尔滨150040 [2]黑龙江大学,化学化工与材料学院,功能无机材料化学教育部重点实验室,哈尔滨150080 [3]哈尔滨市疾病预防控制中心(哈尔滨市卫生检验检测中心),哈尔滨150056

出　　处：《黑龙江大学自然科学学报》2023年第3期283-290,共8页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省自然科学基金(C2018006);黑龙江省大学生创新创业训练计划(202110225226)。

摘　　要：利用共沉淀法,以Zn(NO_(3))_(2)和Al(NO_(3))_(3)为原料成功制备了锌铝复合材料ZnAl-LDH/Al(OH)_(3)(标记为ZAL/AH),采用SEM表征了ZAL/AH的形貌,利用FTIR、XPS和XRD分析了样品的结构及组成。结果表明,所制备的ZAL/AH为片状结构,相组成受投料比的影响。其中,ZAL/AH-1具有高的比表面积,达到82.7 m^(2)·g^(-1)。同时,利用所制备的复合材料ZAL/AH对水中的Pb^(2+)离子进行了吸附实验,ZAL/AH-1对Pb^(2+)的去除率能够达到95%。对吸附结果进行了吸附动力学、Freundlich和Langmuir模型拟合,Langmuir拟合计算得到的最大吸附量为143.3 mg·g^(-1)。The composite of ZnAl-LDH/Al(OH)_(3)(marked as ZAL/AH)was successfully prepared using co-precipitation method from the mixture of Zn(NO_(3))_(2)and Al(NO_(3))_(3).Samples were characterized by SEM,FT-IR,XPS and XRD,and the morphology,structure and components of ZAL/AH were analyzed.The results showed that ZAL/AH had lamellar structure,and its phase composition was determined by the feeding molar ratio of Zn(NO_(3))_(2)and Al(NO_(3))_(3).The prepared ZAL/AH-1 had large specific surface area of 82.7 m^(2)·g^(-1).Meanwhile,the experiments of up-taking of Pb^(2+) were also carried out.The removal efficiency toward Pb^(2+) could reach 95%in the case of ZAL/AH-1.Kinetic models,Freundlich and Langmuir models were used to fit the adsorption process.The Langmuir model was found more suitable to describe the removal process,where the calculated maximum adsorption capacity was 143.3 mg·g^(-1).

关 键 词：吸附 层状双金属氢氧化物 共沉淀法 Pb^(2+) Al(OH)_(3) 

分 类 号：O614.35[理学—无机化学]