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Chemical analysis of low carbon content coals and their applications as dye adsorbent

Abstract

Coal is primarily a fuel material but lately it has been utilized as an adsorbent for removing toxic metal ions. However, its usage for removing organic pollutants is not well studied. We report here a systematic study on the use of coal samples of varying carbon contents as adsorbents for removing Basic Blue 41 as a model cationic dye. The coal samples were collected from coal mines and were thoroughly characterized. The concentrations of carbon, hydrogen, oxygen, nitrogen and sulphur contents were measured by CHNS analyzer. The concentrations of aluminum, silicon, sulphur, titanium and iron were determined by EDXRF, which corresponded to silicon dioxide (quartz) and aluminium silicate (kaolinite) as the major mineral inclusions, corroborated by XRD results and micrographs showing elemental maps determined from SEM-EDAX. The coal samples with low carbon content revealed higher adsorption capacity (qe ∼ 8.0–9.3 mg/g) of Basic Blue dye at optimized adsorbent dose (2 mg/mL), pH 9 and contact time (120 min). The adsorption kinetic studies satisfied pseudo second order model and the intra-particle diffusion of the dye was evident. The dye adsorption followed Langmuir adsorption isotherm, and the qmax values ranged between 17 and 30 mg/g for low carbon content coal. The FT-IR, Brunauer-Emmett-Teller (BET) surface area and zeta potential results of the coal samples could explain the adsorption phenomenon of cationic dye. The kinetic and thermodynamic studies revealed that the adsorption of Basic Blue 41 dye was based on chemisorptions mechanism.

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Authors (8)

  • Photo of  Mohd Azfar Shaida

    Mohd Azfar Shaida

    • Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
  • Photo of  R.k. Dutta

    R.k. Dutta

    • Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
  • Photo of  A.k. Sen

    A.k. Sen

    • Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, 247667, India
  • Photo of  S.s. Ram

    S.s. Ram

    • UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8, Bidhannagar, Kolkata, 700098, India
  • Photo of  M. Sudarshan

    M. Sudarshan

    • UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8, Bidhannagar, Kolkata, 700098, India
  • Photo of  Mu. Naushad

    Mu. Naushad

    • Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
  • Photo of  Md Sadique Nawab

    Md Sadique Nawab

    • Environmental Engineering, Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247667, India

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
CHEMOSPHERE no. 287,
ISSN: 0045-6535
Language:
English
Publication year:
2022
Bibliographic description:
Shaida M. A., Dutta R., Sen A., Ram S., Sudarshan M., Naushad M., Boczkaj G., Nawab M. S.: Chemical analysis of low carbon content coals and their applications as dye adsorbent// CHEMOSPHERE -Vol. 287, (2022), s.132286-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.chemosphere.2021.132286
Verified by:
Gdańsk University of Technology

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