Synthesis of a novel alginate-rubber joint immobilization strains H-1 and its application in removal of Pb (II) from aqueous solution

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Li, Huidong^1 ; Huo, Kaili^1 ; Li, Xiaolei^1 ; Zhang, Lin^1 ; Yun, Yueqing^1 ; Song, Lei^1 ; Bai, Runying^1 ; Liu, Yuhong^1

School of Civil Engineering, Inner Mongolia University of Technology, Hohhot

010051, China^1

关键词: Bacterial suspensions;    Biosorption mechanism;    Biosorption process;    Freundlich isotherm model;    Initial concentration;    Optimum conditions;    Orthogonal experiment;    Pseudo-second order model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/3/032010/pdf
DOI  :  10.1088/1755-1315/121/3/032010

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, a novel alginate-rubber-strains immobilized beads (ARSIBs) was synthesized at the optimum conditions that the concentration of sodium alginate was 4%; the volume of bacterial suspension was 75%; the quality of rubber powder was 3.2%; the crosslinking time was 24 h by the orthogonal experiments. The optimum conditions for Pb (II) adsorption were 1.2% ARSIBs, 100 mg L-1initial concentrations, pH 5 and 3 h contact time. The equilibrium data were well fitted by the Freundlich isotherm model. The biosorption process was nearly consistent with the pseudo-second-order model. Meanwhile, the biosorption mechanism could be that Pb (II) was adsorbed by the hydroxyl and carboxyl, finally precipitated with phosphate in the form of NaPb4(PO4)3, Pb5(PO4)3(OH) and Pb(H2PO4)2based on the spectra of FTIR and XRD, respectively. In addition, the stability of ARSIBs was enhanced due to the addition to the rubber powder in the process of wastewater treatment.