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Performance Evaluation of Agro-Based Adsorbents for the Removal of Cadmium From Wastewater Publisher



Ayub S1 ; Mohammadi AA2 ; Yousefi M3 ; Changani F3
Authors
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Authors Affiliations
  1. 1. Department of Civil Engineering, AMU, Aligarh, UP, India
  2. 2. Department of Environmental Health, Neyshabour University of Medical Sciences, Neyshabur, Iran
  3. 3. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

Source: Desalination and Water Treatment Published:2019


Abstract

An effort has been made in the present research to evaluate the agro-based adsorbents such as coconut shell, walnut shell, and almond shell for the removal of cadmium from electroplating industrial effluent. Adsorption experiments were conducted to evaluate the performance. The highest removal efficiency for Cd(II) is 83.7% at pH 6.5 for coconut shell-activated carbon. The percentage removal of cadmium increases with the decrease in metal concentration. The extent of removal depends on the metal ion concentration, adsorbent dose, contact time, and particle size. Coconut shell is found to be more effective with respect to removal efficiency. Cadmium adsorption follows second-order rate equation for coconut shell. The isotherm data obtained more closely follow the Freundilch adsorption isotherm for coconut shell, while walnut shell and almond shell follow the Langmuir adsorption isotherm better. The coconut shell has the highest potential to remove cadmium ion from electroplating wastewater. © 2019 Desalination Publications. All rights reserved.
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