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Chemical modification of cellulosic biopolymer and its use in removal of heavy metal ions from wastewater.

Abstract：

:Use of biological macromolecules for wastewater remediation process has become the topic of intense research mostly driven by growing concerns about the depletion of petroleum oil reserves and environmental problems. So in view of technological significance of cellulosic biopolymers in various fields, the present study is an attempt to synthesize cellulosic biopolymers based graft copolymers using free radical polymerization. The resulting cellulosic polymers were characterized by Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetric (TGA) analysis. Furthermore, modified cellulosic biopolymer was used in removal of Cu(2+), Zn(2+), Cd(2+) and Pb(2+) toxic metal ions from wastewater. The effects of pH, contact time, temperature and metal ions concentration were studied in batch mode experiments. Langmuir and Dubinin-Radushkevich (D-R) models were used to show the adsorption isotherm. The maximum monolayer capacity qm calculated using Langmuir isotherm for Cu(2+), Zn(2+), Cd(2+), Pb(2+) metal ions were 1.209, 0.9623, 1.2609 and 1.295mmol/g, respectively. The thermodynamic parameters ΔH° and ΔG° values for metal ions adsorption on modified cellulosic biopolymer showed that adsorption process was spontaneous as well as exothermic in nature.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Singha AS,Guleria A

doi

10.1016/j.ijbiomac.2014.03.046

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

409-17

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(14)00218-9

journal_volume

67

pub_type

杂志文章

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