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165954 
Journal Article 
A comparative study on Pb2+, Zn2+ and Cd2+ sorption onto zirconium phosphate supported by a cation exchanger 
Zhang, QR; Du, W; Pan, BC; Pan, BJ; Zhang, WM; Zhang, QJ; Xu, ZW; Zhang, QX 
2008 
Yes 
Journal of Hazardous Materials
ISSN: 0304-3894
EISSN: 1873-3336 
152 
2 
469-475 
English 
17706343 
In the present study, a novel hybrid sorbent ZrP-001 was prepared by loading zirconium phosphate (ZrP)nto a strongly acidic cation exchanger D-001. Sorption behaviorf Pb(2+), Zn(2+), and Cd(2+)nto ZrP-001 was experimentally examined by comparing with the host exchanger D-001. ZrP-001 was characterized by scanning electron micrograph (SEM), X-rayiffraction (XRD), thermogravimetric analysis (TGA), pH-titration and pore sizeistribution analysis. Sorptionf the heavy metalsnto ZrP-001 was found to be pH-dependentue to theon exchange mechanism. Compared to D-001, a smaller pore sizef ZrP-001ue to the ZrPispersion consequently resultedn a lower sorption rate. Competitive effectf Ca(2+)n sorptionf heavy metalsnto ZrP-001 and D-001 was compared to elucidate sorption preferencef the hybrid sorbent towards heavy metals. More favorable sorptionf ZrP-001 than D-001 wasbserved for all the three metals and their sorption preferencento ZrP-001 followed therder Pb(2+)>>Zn(2+) approximately Cd(2+). Fixed-bed sorption results andts efficient regeneration property furtheremonstrated that ZrP-001s a potential candidate for removing heavy metals from contaminated water. 
Heavy metals; Removal; Zirconium phosphate; Hybrid sorbent; Donnan membrane effect