Adsorption study of mercury species from aqueous solution using thiocarbamoyl chitosan

Wan Mohd Afiq Wan Mohd Khalik, Md. Pauzi Abdullah, Fouad Fadhil Al-Qaim, Siti Yusliza Md Yasin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thiocarbamoyl chitosan was successfully synthesized, characterized and tested for mercury removal from aqueous solutions. The chemical structure of thiocarbamoyl chitosan was identified by using the Fourier-Transformed Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) for morphology surface analysis. EDX plot was further confirmed the presence of elemental sulfur on chitosan backbone with weight percentages calculate to be 14.58%. Elemental Analysis (CHNS) was demonstrated the value of 0.55 account to be substitution degree of thiocarbamoyl chitosan. Various parameters such as influence of pH, weight of sorbent, initial concentrations, exposure time, stirring rate and presence of competitor ion was tested. In adsorption isotherm batch experiment, Langmuir model can be fitted well with correlation coefficient value, R2 = 0.983-0.997 only for methyl and ethyl species. Maximum adsorption at monolayer for each species was obtained at 15.03 (MeHg), 11.59 (EtHg) and 27.17 mg/g (Hg (II)), respectively. For inorganic species, Freundlich model was found can be fitted well with R2 = 0.948. The experimental data was demonstrated to follow pseudo second-order kinetics with rate constant of 1.077 (methyl mercury), 1.12 (ethyl mercury) and 1.01 g/mg/min (inorganic mercury), respectively.

Original languageEnglish
Pages (from-to)1095-1108
Number of pages14
JournalInternational Journal of Chemical Sciences
Volume12
Issue number4
Publication statusPublished - 2014

Fingerprint

Chitosan
Mercury
Adsorption
Surface Morphology
Infrared Spectroscopy
Scanning Electron Microscope
Backbone
Rate Constant
Correlation coefficient
Batch
Percentage
Substitution
Kinetics
Experimental Data
Calculate
Model
Experiment

Keywords

  • Mercury
  • Thiocarbamoyl chitosan
  • Water treatment

ASJC Scopus subject areas

  • Mathematics(all)

Cite this

Adsorption study of mercury species from aqueous solution using thiocarbamoyl chitosan. / Khalik, Wan Mohd Afiq Wan Mohd; Abdullah, Md. Pauzi; Al-Qaim, Fouad Fadhil; Yasin, Siti Yusliza Md.

In: International Journal of Chemical Sciences, Vol. 12, No. 4, 2014, p. 1095-1108.

Research output: Contribution to journalArticle

Khalik, Wan Mohd Afiq Wan Mohd ; Abdullah, Md. Pauzi ; Al-Qaim, Fouad Fadhil ; Yasin, Siti Yusliza Md. / Adsorption study of mercury species from aqueous solution using thiocarbamoyl chitosan. In: International Journal of Chemical Sciences. 2014 ; Vol. 12, No. 4. pp. 1095-1108.
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