Document Type : Original Article
Authors
1 Master's degree in Environmental Health Engineering and Student Research Committee of Sabzevar University of Medical Sciences, Iran
2 Department of Environmental Health, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
3 Department of Environmental Health Engineering, Tarbiat Modares University, Tehran, Iran
Abstract
Herbicides, including atrazine, are among the most important newly discovered contaminants found in water bodies and are hazardous to human health and the environment. adsorption is one of the best techniques used to remove these contaminants from contaminated water.
Materials and method:
In this study, two carbon from waste Pomegranate and calligonum Comosum were used to remove atrazine herbicide. After chemical activation these carbons with NH4Cl, and then 800 ° C for 2 hours, parametric tests were performed and the effect of pH, adsorbent concentration, atrazine concentration and contact time were investigated; then absorption equilibrium tests; absorption capacity and its isotherms investigated for the removal of atrazine by two carbons were calculated.
Results:
The results showed that the carbon produced from the calligonum Comosum wood in optimal conditions at pH =7; carbon concentration 0.2 g/L, and the mixing time of 50 minutes could remove 100% atrazine at 25 mg/L . The carbon produced from pomegranate in optimal conditions pH =6; carbon concentration of 0.2 g/L and mixing time of 50 minutes could remove 91.5% atrazine to 25 mg/ L. Absorption equilibrium tests showed that the absorption capacity of carbon Calligonum Comosum and pomegranate were 672 and 645mg/g respectively.
Discussion
The results of this study showed that both carbons have high absorption capacity in the removal of atrazine herbicide and can be an effective and economical absorbent for the removal of this contaminant from natural waters.
Keywords
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