Development of Green Energy Waste Activated Carbon for Removal of Trivalent Chromium: Equilibrium and Kinetic Modeling

S. Kanchi, K. Bisetty, Gopalakrishnan Kumar, Chiu Yue Lin, Tsung Shune Chin

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The present work reports on the potential of using a modified activated carbon as an eco-friendly adsorbent (second stage waste), obtained from a bio-diesel waste production plant, for the removal of Cr(III) ions from aqueous solutions. Chemical activation of the green energy waste (GEW), using sulfuric acid as a dehydrating agent, was adapted in this study The effects of pH, contact time, dosage, and initial concentration were evaluated and optimized in a batch processing mode. The modified activated carbon was fully characterized to observe morphological changes using SEM, XRD, and FT-IR techniques. SEM images however, showed significant changes in the carbon morphology before and after the adsorption of Cr(III) ions. The adsorption results indicated that the equilibrium data were in accordance with the Langmuir isotherm, yielding a maximum monolayer adsorption capacity of 171.0 mg g-1 at 29° C. Moreover, the kinetic studies indicated that the adsorption process followed a pseudo-second-order model. Assessment of our results revealed that GEW-AC was considered as a prospective adsorbent which could be used as a cost-effective substitute for marketable activated carbons for the removal of Cr(III) ions from wastewater systems.

Original languageEnglish
Pages (from-to)513-522
Number of pages10
JournalSeparation Science and Technology (Philadelphia)
Volume49
Issue number4
DOIs
Publication statusPublished - 2014 Jan

Fingerprint

Chromium
Activated carbon
Adsorption
Kinetics
Ions
Adsorbents
Scanning electron microscopy
Biodiesel
Sulfuric acid
Isotherms
Monolayers
Wastewater
Carbon
Chemical activation
Costs

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Filtration and Separation

Cite this

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Development of Green Energy Waste Activated Carbon for Removal of Trivalent Chromium : Equilibrium and Kinetic Modeling. / Kanchi, S.; Bisetty, K.; Kumar, Gopalakrishnan; Lin, Chiu Yue; Chin, Tsung Shune.

In: Separation Science and Technology (Philadelphia), Vol. 49, No. 4, 01.2014, p. 513-522.

Research output: Contribution to journalArticle

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