Haloacetic acid removal by sequential zero-valent iron reduction and biologically active carbon degradation

Shun Tang, Xiao mao Wang, Hong Wei Yang, Yuefeng F. Xie

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Abstract

An innovative haloacetic acid (HAA) removal process was developed. The process consisted of a zero-valent iron (Fe0) column followed by a biologically active carbon (BAC) column that were efficient in degrading tri- and di-HAAs, and mono- and di-HAAs, respectively. The merit of the process was demonstrated by its performance in removing trichloroacetic acid (TCAA). An empty bed contact time of 10min achieved nearly complete removal of 1.2μM TCAA and its subsequent products, dichloroacetic acid (DCAA) and monochloroacetic acid (MCAA). HAA removal was a result of chemical dehalogenation and biodegradation rather than physical adsorption. Preliminary kinetic analyses were conducted and the pseudo-first-order rate constants were estimated at ambient conditions for Fe0 reduction of TCAA and biodegradation of DCAA and MCAA by BAC. This innovative process is highly promising in removing HAAs from drinking water, swimming pool water, and domestic or industrial wastewater.

Original languageEnglish (US)
Pages (from-to)1563-1567
Number of pages5
JournalChemosphere
Volume90
Issue number4
DOIs
Publication statusPublished - Jan 1 2013

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All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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