Adsorptive removal of ni2+ from aqueous solution onto rice husk-based activated carbon

• Main Authors: Taha, M.F., Shuib, A.S., Shaharun, M.S., Borhan, A.
• Format: Article
• Published: Trans Tech Publications Ltd 2014
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84914147105&doi=10.4028%2fwww.scientific.net%2fAMM.625.893&partnerID=40&md5=ef154b80823e8c92853e32f989fd6cdc; http://eprints.utp.edu.my/31922/

The potential of rice husk-based activated carbon (RHAC) as an alternative low-cost adsorbent for the removal of Ni2+ from aqueous solution was studied. RHAC was prepared via chemical treatment using NaOH followed by the carbonization process. The textural properties of rice husk-based activated carbon, i.e. surface area (253 m2/g) and pore volume (0.17 cm2/g), were determined by N2 adsorption. The adsorption studies to remove Ni2+ from aqueous solution using RHAC were carried out at a fixed initial concentration of Ni2+ (150 ppm) with varying RHAC as a function of contact time at room temperature. The concentration of Ni2+ was determined by atomic absorption spectrophotometer (AAS). The maximum removal of Ni2+ was increased from 40 to 89 when the amount of RHAC was increased from 0.1 g to 0.5 g. The isotherm and kinetic analyses showed that equilibrium data of adsorption studies fitted well Langmuir, Freundlich and second order kinetic models. © 2014 Trans Tech Publications, Switzerland.