Functionalization of silica-gel with polyamidoamine and 2-mercaptobenzothiazole and its adsorption property for lead

2017 2nd International Conference on Innovative Engineering Materials

Wu, X.Z.^1 ; Liu, Y.^1 ; Luo, L.L.^1 ; Chen, Z.Y.^1

Department of Chemistry and Bioengineering, Guilin University of Technology, Guilin

541004, China^1

关键词: 2-mercaptobenzothiazole;    Adsorption capacities;    Adsorption properties;    Atomic absorption spectroscopy;    Functionalizations;    Graphite furnaces;    Pre-concentration;    Standard reference material;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/284/1/012014/pdf
DOI  :  10.1088/1757-899X/284/1/012014

来源: IOP

【 摘 要 】

Adsorbents PAMAM-n.0MBTSG (n=1-4) have been prepared by immobilizing polyamidoamine (PAMAM) and 2-mercaptobenzothiazole (MBT) on silica-gel. Characterized with FTIR, SEM, TGA, the preconcentration of Pb2+with PAMAM-n.0MBTSG(n=1-4) has been investigated by graphite furnace atomic absorption spectroscopy (GFAAS). SEM showed that the surface morphology of adsorbent changed with the generation increase of PAMAM. Adsorption capacity of PAMAM-n.0MBTSG for Pb2+(n=1-4) reached 16.22, 19.84, 22.92 and 27.56 mg g-1respectively. Pb2+(1.0 ng mL-1) in 2000 mL solution could be quantitatively absorbed with PAMAM-4.0MBTSG and eluted to obtain a preconcentration factor (PF) of 200. GFAAS method for analysis of Pb2+with PAMAM-4.0MBTSG as adsorbent was proposed and successfully applied to analysis of Pb2+of standard reference material, sea water and squid sample.