Effective removal of Pb(II) by low-cost fibrous silica KCC-1 synthesized from silica-rich rice husk ash

• Main Authors: Rosalyza, Hasan, Chi, Cheng Chong, S. N., Bukhari, Rohayu, Jusoh, Setiabudi, H. D.
• Format: Article
• Language: English
• Published: Elsevier 2019
• Subjects: TP Chemical technology
• Online Access: http://umpir.ump.edu.my/id/eprint/24863/1/Effective%20removal%20of%20Pb%28II%29%20by%20low-cost1.pdf; http://umpir.ump.edu.my/id/eprint/24863/; https://doi.org/10.1016/j.jiec.2019.03.034; https://doi.org/10.1016/j.jiec.2019.03.034

Rice husk ash was utilized as a low-cost silica precursor in preparing KCC-1(RHA) for Pb(II) removal. The characterization results revealed the comparable properties of KCC-1(RHA) with the conventional KCC-1. The optimum adsorption conditions were achieved at initial concentration of 322.06 mg/L, adsorbent dosage of 2.4 g/L, and time of 117 min, with Pb(II) removal of 75%. The experimental results followed the pseudo-second-order kinetic model (R2 ≥ 0.9950) and Langmuir isotherm model (R2 = 0.9934). The KCC-1(RHA) showed good performance during five cycles of adsorption-desorption, thus, affirmed great potential of RHA as silica precursor in synthesizing KCC-1(RHA) for excellent Pb(II) removal.