Removal of Chromium (VI) from Wastewater by Palm Kernel Shell-based on a Green Method
Subject Areas : Journal of Chemical Health RisksMaryam Razavi Mehr 1 , Mohammad Hossein Fekri 2 , Faezeh Omidali 3 , Noushin Eftekhari 4 , Behrouz Akbari-adergani 5
1 - 1Department of Chemistry, Ayatollah Boroujerdi University, Borujerd, Iran
2 - Department of Chemistry, Ayatollah Boroujerdi University, Borujerd, Iran
3 - 1Department of Chemistry, Ayatollah Boroujerdi University, Borujerd, Iran
4 - Department of Chemistry, Ayatollah Boroujerdi University, Borujerd, Iran
5 - Food and Drug Laboratory Research Center, Food and Drug Administration, Ministry of Health and Medical Education, Tehran, Iran
Keywords: Activated Carbon, Freundlich isotherm, Adsorption capacity, Chromium (VI), Palm Kernel Shell,
Abstract :
The potential of palm kernel shell, as agricultural waste, to remove Cr (VI) from aqueous solution was evaluated. Effective parameters such as pH (2–8), temperature (20–80 °C), contact time (10-120 min), adsorbent concentration (0.1–1 g/L), and initial Cr (VI) concentration (10-100 mg/L) were all studied to attain the maximum removal efficiency. Results show the adsorption capacity increases as pH value decreases and the optimum pH value is pH= 2.0. The other optimal conditions are temperature 40 °C, contact time 45 min, adsorbent concentration 0.5 g/L and initial Cr (VI) concentration 10 mg/L. The equilibrium data for chromate adsorption well fitted to Freundlich equation, with maximum adsorption capacity of 125 mg/g. This novel activated carbon derived from palm shell powder has been found to be effective for the removal of Cr (VI) and not noxious to the ecosystem.
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