Reduction of DBP Precursors and Their THMFPs in Leachate Contaminated Groundwater by PAC Adsorption

  • Kanlayanee Yimyam Chiang Mai University
  • Aunnop Wongrueng Chiang Mai University
  • Pharkphum Rakruam Chiang Mai University
  • Saoharit Nitayavardhana Chiang Mai University
  • Athit Phetrak Mahidol University
  • Suthida Theepharaksapan Srinakarinwirot University
  • Suraphong Wattanachira Chiang Mai University

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Abstract

This research investigated the reduction of dissolved organic matter (DOM) fractions and their trihalomethane formation potentials (THMFPs) by powder activated carbon (PAC) adsorption. Leachate contaminated groundwater around an inactive open-dumping landfill was selected as the raw water. The PAC adsorption reaction was proven to be the pseudo second order kinetic reaction and the Freundlich isotherm. The dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and THMFP removals were 55%, 57%, and 73%, respectively. The hydrophobic (HPO) fraction exhibited a higher THMFP compared to the hydrophilic (HPI) fraction. The results of DOM fractionation show that the use of PAC adsorption produced an efficient 87% reduction of the HPO fraction, which is characterized as having a high reactivity toward THMFP.

Author Biographies
Kanlayanee Yimyam

Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University

Aunnop Wongrueng

Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University

Pharkphum Rakruam

Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University

Saoharit Nitayavardhana

Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University

Athit Phetrak

Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University

Suthida Theepharaksapan

Department of Civil and Environmental Engineering, Faculty of Engineering, Srinakarinwirot University

Suraphong Wattanachira

Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University

Keywords
Adsorption, dissolved organic matter, leachate, powder activated carbon, trihalomethane formation potential.

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