Biosorption of Pb(II) from aqueous solution using modified wheat straw

Kai Huang, Gensheng Sun, Rui Su, Shuqiang Jiao, Hongmin Zhu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The objective of this study was to convert wheat straw to metal ion adsorbent for waste water treatment. Ground wheat straw particles were modified with 0.5M citric acid to activate its natural adsorption capacity. The biosorption characteristics of Pb(II) onto modified wheat straw (MWS) gel, were evaluated as a function of pH, time, biomass dosage, initial concentration and temperature. Within the pH range studied (1.5-5.0), the optimal pH value suitable for the uptaking of Pb(II) was estimated at pH 5.0. Different models are used to fit experimental data and it indicates that the adsorption process follows Langmuir model and pseudo-second-order model. The maximum adsorption capacity obtained from the Langmuir model is 0.18mol kg1 for the prepared sorbent. Equilibrium time is attained at 5-10min for the studied Pb(II) ion concentrations. The present study verified that such-modified wheat straw can be used as an effective and low-cost biosorbent for removal of Pb(II) from aqueous solution.

Original languageEnglish
Title of host publication2011 International Conference on Electrical and Control Engineering, ICECE 2011 - Proceedings
Pages3856-3859
Number of pages4
DOIs
Publication statusPublished - 2011 Nov 16
Externally publishedYes
Event2nd Annual Conference on Electrical and Control Engineering, ICECE 2011 - Yichang, China
Duration: 2011 Sep 162011 Sep 18

Publication series

Name2011 International Conference on Electrical and Control Engineering, ICECE 2011 - Proceedings

Other

Other2nd Annual Conference on Electrical and Control Engineering, ICECE 2011
Country/TerritoryChina
CityYichang
Period11/9/1611/9/18

Keywords

  • Lead removal
  • biosorption
  • citric acid treatment
  • modified wheat straw

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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