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KSCE Journal of Civil Engineering

, Volume 23, Issue 3, pp 992–999 | Cite as

Nano-pyrite as a Reductant to Remove Chromium in Groundwater

  • Nurul Aqilah Abdul
  • Suhaimi Abdul-Talib
  • Amnorzahira AmirEmail author
Environmental Engineering
  • 32 Downloads

Abstract

Removal of total chromium (CrT) by nano-pyrite (nano-FeS2) was investigated under different environmental conditions. Size of nano-FeS2 was in the range of 50−100 nm and it contained Fe and S. Removal kinetic rate constant of CrT was significantly dependent on the suspension pH and concentrations of CrT, nano-FeS2 and Humic Acid (HA). The removal kinetic rate constant of CrT by nano-FeS2 was decreased as the concentration of CrT was increased (0.43−0.29 min−1), while contradict kinetic result was observed as the concentration of nano-FeS2 was increased (1.11−2.78 min−1). The removal kinetic rate constant of CrT was significantly increased as the suspension pH increased (0.86−3.0 min−1). However, the removal kinetic rate constant of CrT was significant decreased in the present of HA (1.25−0.25 min−1). The removal kinetic rate constant of CrT by nano-FeS2 was strongly controlled by the reactive surface area of nano-FeS2. Identification of the formation of FeCr2O4 on the surface of nano-FeS2 reveals that adsorption, complexation and reduction reactions may occur during the removal reaction. This study provides fundamental knowledge on the fate of Cr under different groundwater conditions. Findings from this study can be used to enhance remediation technology of removal heavy metals from groundwater.

Keywords

chromium humic acid groundwater nano-FeS2 removal kinetic rate constant 

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Copyright information

© Korean Society of Civil Engineers 2019

Authors and Affiliations

  • Nurul Aqilah Abdul
    • 1
  • Suhaimi Abdul-Talib
    • 1
  • Amnorzahira Amir
    • 1
    Email author
  1. 1.Bioremediation Research Centre (myBioREC)The MARA University of TechnologyShah AlamMalaysia

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