Kinetic study of Chromium VI adsorption onto palm kernel shell activated carbon

4th International Conference on Civil and Environmental Engineering for Sustainability

地球科学;生态环境科学;经济学

Mohammad, Masita^1 ; Sadeghi Louyeh, Shiva^2 ; Yaakob, Zahira^2

Solar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi, Selangor

43600, Malaysia^1

Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor

43600, Malaysia^2

关键词: Adsorbent concentration;    Agricultural industries;    Environmental problems;    Heavy metal contamination;    Intra-particle diffusion;    Metal ion concentration;    Second order kinetics;    Utilization of residues;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/140/1/012018/pdf
DOI  :  10.1088/1755-1315/140/1/012018

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Heavy metal contamination of industrial effluent is one of the significant environmental problems due to their toxicity and its accumulation throughout the food chain. Adsorption is one of the promising methods for removal of heavy metals from aqua solution because of its simple technique, efficient, reliable and low-cost due to the utilization of residue from the agricultural industry. In this study, activated carbon from palm kernel shells has been produced through chemical activation process using zinc chloride as an activating agent and carbonized at 800 °C. Palm kernel shell activated carbon, PAC was assessed for its efficiency to remove Chromium (VI) ions from aqueous solutions through a batch adsorption process. The kinetic mechanisms have been analysed using Lagergren first-order kinetics model, second-order kinetics model and intra-particle diffusion model. The characterizations such as BET surface area, surface morphology, SEM-EDX have been done. The result shows that the activation process by ZnCl2was successfully improved the porosity and modified the functional group of palm kernel shell. The result shows that the maximum adsorption capacity of Cr is 11.40mg/g at 30ppm initial metal ion concentration and 0.1g/50mL of adsorbent concentration. The adsorption process followed the pseudo second orders kinetic model.