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Biosorption of Hg(II) ions from synthetic wastewater using a novel biocarbon technology

Singanan, Malairajan

  • Received : 2014.06.05
  • Accepted : 2015.01.14
  • Published : 2015.03.31

Abstract

Mercury is a toxic pollutants present in different types of industrial effluents and is responsible for environmental pollution. Removal of Hg(II) ions from synthetic wastewater was studied using the activated biocarbon produced from the leaves of Tridax procumbens (Asteraceae). The particle size of the biocarbon (BC) is in the range of $100-120{\mu}m$. The effects of initial metal ion concentration, pH, contact time, and amount of biocarbon on the biosorption process were studied at temperature of $28{\pm}2^{\circ}C$. Batch experimental studies showed that an equilibrium time of 160 min was required for the maximum removal of Hg(II) at the optimized biocarbon dose of 2.5 g per 100 mL of synthetic wastewater. The optimum pH required for maximum removal (96.5%) of Hg(II) ions was found to be 5.5. The biosorption of metal ions onto activated biocarbon surface is probably via an ion exchange mechanism. The biocarbon can be regenerated with minimum loss. Further, it can be reused without any chemical activation. The findings of the research suggested that, the biocarbon produced from cost effective renewable resources can be utilized for the treatment of industrial wastewater.

Keywords

Biocarbon;Biosorption;Mercury;Synthetic wastewater;Tridax procumbens (Asteraceae)

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