Heavy metal precipitation by polycation-polyanion complex of PEI and its phosphonomethylated derivative

Issue Date

8-2005

Abstract

The removal of various heavy metal ions such as Cu2+, Co 2+, Zn2+, Ni2+ and Pb2+ from aqueous solutions by precipitation with polyelectrolyte complex of PPEI and PEI was conducted. Heavy metal binding with PPEI was initially allowed to occur and then upon equilibration, PEI was added to initiate precipitation of the polyelectrolyte complex together with the heavy metal ion. The PPEI-PEI system was found effective for heavy metal scavenging purposes even in the presence of high concentrations of non-transition metal ions like Na+. Heavy metal concentration may be reduced beyond emission standards for industrial wastewaters. The PPEI-PEI polyelectrolyte complex was found to be more effective than traditional precipitation methods for the treatment of a representative electroless Ni plating waste solution. © 2005 Elsevier B.V. All rights reserved.

Source or Periodical Title

Journal of Hazardous Materials

ISSN

3043894

Volume

123

Issue

1-3

Page

203-209

Document Type

Article

Language

English

Subject

Chelation, Heavy metals, PEI, Phosphonomethylated-PEI, Polyelectrolyte complex, Precipitation, Wastewater treatment

Identifier

DOI: 10.1016/j.jhazmat.2005.03.048

Digital Copy

YES

Link to Full Text

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