Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4763556 | Chemical Engineering Journal | 2017 | 11 Pages |
Abstract
The aim of this study was to investigate the applicability of the adsorption process for the removal of organophosphorus pesticide malathion 57% from water by using multi-walled carbon nanotubes (MWCNTs). The impact of various experimental conditions such as pH, quantity of adsorbent, concentration of pesticides, contact time and temperature was studied and optimized for the maximum removal of malathion. Unlike conventional optimization, a limited number of experiments (26 steps) were performed in a cost-effective manner for different independent variables such as MWCNTs concentration (0.1-0.5Â g/L), the malathion (57%) concentration (6Â mg/L and 10Â mg/L), contact time (2-30Â min) and pH (neutral range). Based on the experimental data obtained in a lab-scale batch study, a three-factor response surface modeling (RSM) approach was implemented in order to optimize the conditions for maximum removal of malathion, and compare experimental results with standardized malathion samples. The optimized conditions to achieve the maximum removal of malathion (100%) were determined to be a malathion concentration of 6Â mg/L, an initial MWCNTs concentration of 0.5Â g/L, and a contact time of 30Â min. Findings of this study clearly indicated that 100% of the malathion could be cost-effectively removed by MWCNTs in conditions predicted by the proposed optimization methodology.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Mohammad Hadi Dehghani, Zahra Shariati Niasar, Mohammad Reza Mehrnia, Mansoreh Shayeghi, Mohammad A. Al-Ghouti, Behzad Heibati, Gordon McKay, Kaan Yetilmezsoy,