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Response surface methodology, modeling to improve mercury removal from aqueous solutions using L-Cysteine functionalized Multi-walled Carbon Nanotubes

Paper Topic: 
Green Chemistry and Sustainable Development
 

Pages :
-

Corresponing Author: 
Mohammad Ali Zazouli
 
Authors: 
Tabarinia H., Zazouli M.A., Yousefi Z., Kalankesh L., Yazdani Charati J.
Paper ID: 
gnest_01984
Paper Status: 
Proof
Date Paper Accepted: 
10/12/2018
Paper online: 
04/01/2019
Abstract: 

The aim of this study was to evaluate the mercury removal from aqueous solutions by using L-Cysteine functionalized Multi-walled Carbon Nanotubes. The effect of pH, adsorbent dose, contact time and mercury concentration in removal efficiency was evaluated. Multi -walled carbon nanotubes were functionalized with L-cysteine. The Response Surface Methodology (RSM) was used to find the optimum process parameters. The results showed that an increase in contact time, pH and adsorbent dosage resulted in an increase of the adsorption rate. However, removal efficiency decreases by increasing mercury concentration. The highest and lowest removal efficiencies of mercury were 89% and 17%, respectively. The maximum adsorption rate was occurring at 120 min. It is concluded that L-Cysteine functionalized multi-walled carbon nanotubes is an effective adsorbent for removal from aqueous solutions.

Keywords: 
Carbon Nanotubes, L-Cysteine, Mercury, Adsorption