Zn/Co-LDHs纳米吸附材料的制备及其对含磷废水的净化效果研究  

Preparation of Zn/Co⁃LDHs nanoadsorbent and its purification effect on phosphorus⁃containing wastewater

作　　者：王泽华 张珂[1,2] 孙玉 赵晓辉 马利鸽 鲁铭函 李阳 崔节虎 WANG Zehua;ZHANG Ke;SUN Yu;ZHAO Xiaohui;MA Lige;LU Minghan;LI Yang;CUI Jiehu(Zhengzhou University of Aeronautics,Zhengzhou 450015,China;Zhengzhou Key Laboratory of Environment Functional Materials,Zhengzhou 450015,China)

机构地区：[1]郑州航空工业管理学院,河南郑州450015 [2]郑州市环境功能材料重点实验室,河南郑州450015

出　　处：《中国有色冶金》2023年第3期66-73,共8页China Nonferrous Metallurgy

基　　金：国家自然科学基金(21771165);河南省科技攻关项目(212102310520);河南省科技攻关项目(212102310069)。

摘　　要：磷是水体富营养化的主要限制因子之一,水环境中磷元素的去除对于水体富营养化治理具有重大意义。类水滑石及类水滑石化合物具有较大的比表面积、较好的再生性和优越的阴离子吸附性,是优良的吸附材料。本文以硝酸锌和硝酸钴为原料,采用水热法成功制备了一种新型的Zn/Co-LDHs纳米吸附材料,使用SEM、XRD、IR、BET对新吸附材料进行了表征,并进行了含磷废水的吸附试验,考察了材料投加量、磷酸根离子浓度、吸附时间对吸附效果的影响,得到如下结论:Zn/Co-LDHs纳米材料具有典型的类水滑石结构和较大的比表面积;Zn/Co-LDHs对磷酸根的吸附等温线符合Langmuir和Freundlich吸附等温模型;吸附动力学过程符合准一级动力学模型;在温度25℃、Zn/Co-LDHs投加量1.0 g/L、磷酸根离子浓度10 mg/L、吸附时间30 min的条件下,Zn/Co-LDHs材料对废水中磷的最大吸附量为6.3 mg/g。Phosphorus is one of the main limiting factors for eutrophication in water bodies,and the removal of phosphorus from the aqueous environment is of great significance for the management of eutrophication in water bodies.In this paper,LDHs have large specific surface area,good regeneration ability,and superior anion adsorption properties,making them excellent adsorption materials.A new type of Zn/Co-LDHs nano adsorption material was successfully prepared using zinc nitrate and cobalt nitrate as raw materials using hydrothermal method.The new adsorption material was characterized using SEM,XRD,IR and BET,and adsorption experiments were conducted on phosphorus⁃containing wastewater.The effects of material dosage,phosphate ion concentration and adsorption time on the adsorption effect were investigated.The results show that the Zn/Co-LDHs nanomaterials have a typical hydrotalcite⁃like structure and a large specific surface area;the adsorption isotherm of Zn/Co-LDHs on phosphate conforms to the Langmuir and Freundlich adsorption isotherms;the adsorption kinetic process follows pseudo⁃first⁃order kinetic model.Under the condition of 25℃,with the 1.0 g/L dosage of Zn/Co-LDHs,the 10 mg/L concentration of phosphate ions,the adsorption reached the adsorption equilibrium after 30 min,and the maximum adsorption capacity was 6.3 mg/g.Zn/Co-LDHs had excellent phosphorus removal effect on different types of eutrophic water bodies.

关 键 词：Zn/Co-LDHs 纳米材料 吸附材料 磷去除 吸附量 废水处理 

分 类 号：X703[环境科学与工程—环境工程] TF81[冶金工程—有色金属冶金]