Reaction of activated carbon zerovalent iron with pentachlorophenol under anaerobic conditions

Yangmin Ren, Junjun Ma, Yonghyeon Lee, Zhengchang Han, Mingcan Cui, Bin Wang, Mingce Long, Jeehyeong Khim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Pentachlorophenol (PCP) is a toxic pollutant and often treated with zero-valent iron (ZVI) in groundwater. In order to improve the reaction rate and selectivity, activated carbon modified zero-valent iron to degrade PCP. This study investigated the effects of carbon loading on the structure, specific surface, and hydrophobicity of AC-ZVI. The results showed that water contact angle and specific surface, which determined hydrophobicity and adsorption capacity, account for the reactivity and selectivity of AC-ZVI during the reduction degradation of the contaminant PCP. The pseudo-first-order kinetic degradation rate of AC-ZVI is 7.44ⅹ10−2 h−1, and two times higher than for ZVI (3.21ⅹ10−2 h−1). Besides, as the [C/Fe]measured weight ratio increased, the ratio of KPCP/KH2 increased from a minimum of 0.218% to a maximum of 0.533%. Based on the pathway of AC-ZVI and PCP, the reduction degradation mechanism of PCP was discussed. These findings can contribute to the rational design of AC-ZVI with properties tailored to a variety of halogenated organics in groundwater remediation.

Original languageEnglish
Article number126748
JournalJournal of Cleaner Production
Volume297
DOIs
Publication statusPublished - 2021 May 15

Keywords

  • 57Fe Mössbauer spectra
  • Activated carbon-zero valent iron
  • Contact angles
  • Pentachlorophenol
  • Specific surface area

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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