Application of half-order kinetics to sulfur-utilizing autotrophic denitrification for groundwater remediation

Naveed Ahmed Qambrani, Yeong Sang Jung, Jae Eui Yang, Yong Sik Ok, Sang Eun Oh

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The kinetics of sulfur-utilized autotrophic denitrification of groundwater was evaluated in batch tests to obtain kinetic parameters. Experiments were performed in media bottles containing varying NO3 -N concentrations (20, 44, and 77 mg/L) with 4.0–4.75 mm-sized sulfur particles. Alkalinity was set as a constant in all experimental containers at 850 mg/L as CaCO3. The half-order kinetic model was found to adequately describe the process efficiently, yielding denitrification rate constants of 4.36, 5.51, and 6.91 mg-N1/2/L1/2 · h in the presence of NO3 -N at 20, 44, and 77 mg/L, respectively. The rate of denitrification increased with the increasing initial NO3 -N concentrations.

Original languageEnglish
Pages (from-to)3445-3450
Number of pages6
JournalEnvironmental Earth Sciences
Volume73
Issue number7
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • Half-order kinetic model
  • Nitrate removal
  • Reaction rate constants
  • Sulfur-denitrifying bacteria
  • Sulfur-utilizing autotrophic denitrification

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Water Science and Technology
  • Soil Science
  • Pollution
  • Geology
  • Earth-Surface Processes

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