Adsorptive removal of phosphate by the bimetallic hydroxide nanocomposites embedded in pomegranate peel  

作　　者：Muhammad Akram Xing Xu Baoyu Gao Qinyan Yue Shang Yanan Rizwan Khan Muhammad Ali Inam 

机构地区：[1]Shandong Key Laboratory of Water Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Shandong University,Qingdao 266200,China [2]Department of Chemical Engineering,Quaid-e-Awam University of Engineering,Science and Technology(QUEST),Naiuabshah 67480,Sindfi,Pakistan [3]Institute of Environmental Sciences and Engineering(IESE),School of Civil and Environmental Engineering(SCEE),National University of Sciences and Technology(NUST)H-12 Campus,Islamabad 44000,Pakistan

出　　处：《Journal of Environmental Sciences》2020年第5期189-198,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51978384);Tai Shan Scholar Foundation(No.ts20151003)

摘　　要：This study aimed to fabricate new and effective material for the efficiency of phosphate adsorption.Two types of adsorbent materials,the zirconium hydroxides embedded in pomegranate peel(Zr/Peel)and zirconium-lanthanum hydroxides embedded in pomegranate peel(Zr-La/Peel)were developed.Scanning electronic microscopy(SEM),x-ray photoelectron spectroscopy(XPS)and x-ray diffraction(XRD)were evaluated to give insight into the physicochemical properties of these adsorbents.Zr-La/Peel exceeded the adsorption efficiency of Zr/Peel adsorbents in batch adsorption experiments at the same pH level.The peel as a host can strive to have a strong"shielding effect"to increase the steadiness of the entrenched Zr and La elements.La and Zr are hydroxide metals that emit many hydrogen ions during the hydrolysis reaction,which contribute to protonation and electrostatic attraction.The highest adsorption capacity of La-Zr/Peel for phosphate was calculated to be40.21 mg/g,and pseudo second-order equation is very well fitted for kinetic adsorption.Phosphate adsorption efficiency was reduced by an increase of pH.With the background of coexisting Cl-,little effect on adsorption efficiency was observed,while adsorption capacities were reduced by almost 20-30%with the coexistence of SO42-,NO3-and humic acid(HA).

关 键 词：Bimetallic hydroxides Pomegranate peel PHOSPHATE Adsorption 

分 类 号：X703[环境科学与工程—环境工程] O647.3[理学—物理化学]