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Treatment of Textile Effluent of Fokir Knitwear in Bangladesh Using Coagulation-Flocculation and Adsorption Methods

Author Affiliations

  • 1 Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology. Sylhet 3114, BANGLADESH
  • 2 Centre for Environmental Process Engineering, Shahjalal University of Science and Technology. Sylhet 3114, BANGLADESH
  • 3 Faculty of Chemical and Natural Resources, Universiti Malaysia Pahang, 26300 Gambang, Kuantan, Pahang, MALAYSIA

Int. Res. J. Environment Sci., Volume 2, Issue (6), Pages 49-53, May,22 (2013)

Abstract

Attempt has been made to study the treatability of textile water using coagulation- flocculation process and adsorption method. Experiments were carried out to attain the optimum doses of coagulant (FeSO) and flocculant (CaO). The result showed that 2.5 kg/m of CaO and 2 kg/m of FeSO4 were the optimum doses achieving 61.3% COD reduction from the effluent. Batch sorption experiments were also conducted to remove COD from the effluent by using commercial activated charcoal. The obtained adsorption equilibrium data were found to follow Langmuir adsorption isotherm. The maximum monolayer sorption capacity was 0.25113 kg/kg. Effects of adsorbent dose and contact time were also investigated and found that adsorption of COD increased with contact time and adsorbent dose. Kinetic data were fitted with unified approach model and the rate constants were evaluated.

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