Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions

Pristine orange peel was chemically modified by introducing sulfur groups with the carbon disulfide treatment in alkaline medium. The presence of sulfur groups on orange peel xanthate were identified by FTIR spectroscopic study. Equilibrium isotherms and kinetics were obtained and the effect of vari...

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Bibliographic Details
Published inJournal of hazardous materials Vol. 170; no. 1; pp. 425 - 429
Main Authors Liang, Sha, Guo, Xueyi, Feng, Ningchuan, Tian, Qinghua
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier 15.10.2009
Subjects
Adsorption
Applied sciences
Chemical engineering
Citrus sinensis - chemistry
Exact sciences and technology
Hydrogen-Ion Concentration
Ions
Kinetics
Lead - isolation & purification
Pollution
Solutions
Temperature
Water Pollutants, Chemical - isolation & purification
Xanthenes - chemistry
Complexation
Second order
Pb
Adsorption
Batchwise
Xanthate
Orange peel
Adsorption capacity
pH
Kinetics
Aqueous solution
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Summary:Pristine orange peel was chemically modified by introducing sulfur groups with the carbon disulfide treatment in alkaline medium. The presence of sulfur groups on orange peel xanthate were identified by FTIR spectroscopic study. Equilibrium isotherms and kinetics were obtained and the effect of various parameters including equilibrium pH, contact time, temperature and initial ion concentration on adsorption of Pb(2+) were studied by batch experiments. The maximum adsorption capacity of orange peel xanthate was 204.50 mg g(-1), which was found to increase by about 150% compared to that of pristine orange peel. The adsorption process can attain equilibrium within 20 min, and kinetics was found to be best-fit pseudo-second-order equation. Temperature has little effect on the adsorption capacity of orange peel xanthate. In addition, the adsorption mechanism was suggested to be complexation.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2009.04.078