Removal of Cu(II) from Industrial Effluents by Citric Acid Modified Rice Straw

Authors

  • E. Che Zulzikrami Azner A. School of Environmental Engineering, Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.
  • Naimah Ibrahim
  • M.R. Fahmi School of Environmental Engineering, Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.
  • S. Salsuwanda School of Environmental Engineering, Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.

DOI:

https://doi.org/10.54987/bstr.v2i1.59

Keywords:

Adsorption, citric acid, rice straw, copper ions, wastewater

Abstract

The aim of the present study was to convert rice straw, a by-product of rice production to a metal adsorbent and investigate the potential of using the adsorbent for the removal of Cu (II) ions. The rice straw was modified with citric acid (CA) to enhance its nature's adsorption capacity. Batch adsorption studies of Cu (II) adsorption were carried out under various operating conditions, and found to be pH, initial adsorbate concentration, contact time, and temperature dependent. Experimental data were analyzed using the Langmuir and Freudlinch isotherm models, and can be well described by the Langmuir isotherm model that supports the assumption that adsorption takes place by single layer on homogeneous surfaces. Kinetic studies indicated that pseudo-second-order kinetic equation provides better data correlation than pseudo-first-order kinetic model. Thermodynamic studies show that the standard Gibbs free energy of the process at all temperatures was negative and changed with temperature increase, indicatinga spontaneous processthat increases with temperature. CA modified rice straw (CARS) shows a considerable potential as a low-cost and highly efficient biomaterial to be a new single-use adsorbent for Cu (II) ions removal from wastewater.

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Published

2014-07-20

How to Cite

Che Zulzikrami Azner A., E., Ibrahim, N., Fahmi, M., & Salsuwanda, S. (2014). Removal of Cu(II) from Industrial Effluents by Citric Acid Modified Rice Straw. Bioremediation Science and Technology Research (e-ISSN 2289-5892), 2(1), 23–28. https://doi.org/10.54987/bstr.v2i1.59

Issue

Vol. 2 No. 1 (2014)

Section

Articles

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