Application of Taguchi method for the optimization of Fe2+ removal from contaminated synthetic groundwater using a rotating packed bed contactor

Wan Mohd Zamri W. Ismail, Yee Sern Ng, Sumona Mukherjee, Anirban Kundu, Soumyadeep Mukhopadhyay, Bhaskar Sen Gupta, Mohd Ali Hashim, Ismail Yusoff

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Abstract

Malaysia contains elevated levels of iron in shallow groundwater in the range of 3–7 mg Fe/L compared to the USEPA safe limit of 0.3 mg Fe/L. Air Kelantan Sdn Bhd in Malaysia uses the ‘River Bank Filtration’ (RBF) technology to harvest hyporheic water. The RBF treatment removes the turbidity of the river water through the river bed acting as a filter, but is unable to remove the Fe from the harvested water. This work proposes a technology to reduce Fe concentration in the extracted water using granular activated carbon in a laboratory‐scale rotating packed bed contactor (RPBC). The Taguchi method was used for optimizing the operating conditions for the adsorption of Fe onto activated carbon in the RPBC system. Taguchi optimization results showed that a removal efficiency of 87% Fe from a 50 mg Fe/L concentration could be achieved by a RPBC at an initial pH of 6.5, a feed rate of 40 L/h, a rotating speed of 1600 rpm and a packing density of 357 kg/m3.
Original languageEnglish
JournalWater and Environment Journal
Early online date28 Jan 2019
DOIs
Publication statusE-pub ahead of print - 28 Jan 2019

Keywords

  • adsorption
  • Fe removal
  • GAC
  • Higee contactor
  • optimization
  • rotating packed bed
  • Taguchi

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Pollution
  • Management, Monitoring, Policy and Law

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