NFe 0 /GAC-mediated advanced catalytic per-oxidation for pharmaceutical wastewater treatment

Vijayalakshmi Gosu, Bhola Ram Gurjar, Rao Y. Surampalli, Tian C. Zhang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the present study, the treatment of pharmaceutical wastewater (PWW) in terms of organic content (COD, TOC) has been investigated using advanced catalytic per-oxidation (ACPO) with granular activated carbon supported nano zero valent iron (nFe 0 /GAC). The characteristics of PWW and optimization of reaction parameters that influence the process efficiency have also been evaluated. The PWW contains a high amount of organic content of non-biodegradable nature. At optimum conditions, ∼81% COD and ∼76% TOC removal was attained. Moreover, ACPO process was more favorable to the complete oxidation. The reaction kinetics follows the two-step pseudo first-order model. The activation energy (E) for the first and second steps was calculated as ∼22 and ∼23 kJ/mol, respectively. The two-step kinetics can be attributed primarily to the oxidation of organic compound first to short chain molecular structures (organic acids) followed by their complete oxidation to produce carbon dioxide and water. Moreover, the average oxidation state (AOS) got raised from -1.8 to 2.1, which represents the strong mineralization and the generation of highly oxidized intermediates. Thus, the treatment of PWW using nFe 0 /GAC + H 2 O 2 could be considered to be an effective alternative treatment option.

Original languageEnglish (US)
Pages (from-to)1996-2004
Number of pages9
JournalJournal of Environmental Chemical Engineering
Volume2
Issue number4
DOIs
StatePublished - Dec 2014

Fingerprint

Wastewater treatment
Drug products
drug
oxidation
Oxidation
Wastewater
Pharmaceutical Preparations
wastewater
Organic acids
reaction kinetics
organic acid
Organic compounds
Carbon Dioxide
Reaction kinetics
activation energy
Activated carbon
Molecular structure
activated carbon
wastewater treatment
organic compound

Keywords

  • Advance Fenton's reagent (nFe /GAC + H O )
  • Advanced catalytic per-oxidation
  • Kinetic study
  • Pharmaceutical wastewater
  • Wastewater treatment

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

Cite this

NFe 0 /GAC-mediated advanced catalytic per-oxidation for pharmaceutical wastewater treatment . / Gosu, Vijayalakshmi; Gurjar, Bhola Ram; Surampalli, Rao Y.; Zhang, Tian C.

In: Journal of Environmental Chemical Engineering, Vol. 2, No. 4, 12.2014, p. 1996-2004.

Research output: Contribution to journalArticle

Gosu, Vijayalakshmi ; Gurjar, Bhola Ram ; Surampalli, Rao Y. ; Zhang, Tian C. / NFe 0 /GAC-mediated advanced catalytic per-oxidation for pharmaceutical wastewater treatment In: Journal of Environmental Chemical Engineering. 2014 ; Vol. 2, No. 4. pp. 1996-2004.
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