Facile Synthesis of Poly-Dithiocarbamate for Efficient Removal of Heavy Metals from Wastewater
A facile strategy was developed to synthesize a poly-dithiocarbamate (PDTC) by a one-pot fabrication process. Its structure was characterized by SEM, FT-IR, NMR, element analysis, and nitrogen adsorption/desorption isotherms. The results confirmed PDTC contained a large number of dithiocarbamate functional groups and mesopores. It was used as a sorbent for the removal of heavy metals from aqueous solutions. PDTC showed a preferable adsorption performance toward Pb(II) and Cu(II) rather than other dithiocarbamate functionalized polystyrene, styrene–divinylbenzene and active carbon adsorbents. The adsorption kinetics and isothermal equilibriums were fitted particularly well by the pseudo-second-order model and the Langmuir isotherm model, respectively. The applicability of PDTC for industrial wastewater treatment indicated it could efficiently remove 99.4% Pb(II) to 0.0075 ppm, the concentrations of Cu(II), Cr(III), Cd(II), and Zn(II) were all reduced below the limits of the National Standard of China (GB 21900-2008). PDTC showed much higher selectivity toward Pb(II) than other metal ions. The feasible one-pot preparation, low cost and high performance makes the PDTC being promising for practical usage in wastewater treatment.
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Document Type: Research Article
Publication date: April 1, 2016
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