Synthesis of KCC-1 using rice husk ash for Pb removal from aqueous solution and petrochemical wastewater

• Main Authors: Rosalyza, Hasan, Chong, Chi Cheng, Setiabudi, H. D.
• Format: Article
• Language: English; English
• Published: Department of Chemical Engineering, Diponegoro University 2019
• Subjects: TP Chemical technology
• Online Access: http://umpir.ump.edu.my/id/eprint/24384/1/Synthesis%20of%20KCC-1%20using%20rice%20husk%20ash%20for%20Pb%20removal%20from%20aqueous%20solution%20and%20petrochemical%20wastewater.pdf; http://umpir.ump.edu.my/id/eprint/24384/7/Synthesis%20of%20KCC-1%20using%20rice%20husk%20ash%20for%20Pb%20removal.pdf; http://umpir.ump.edu.my/id/eprint/24384/; https://doi.org/10.9767/bcrec.14.1.3619.196-204; https://doi.org/10.9767/bcrec.14.1.3619.196-204

silica-rich rice husk ash (RHA, 95.44% SiO2) was used as a silica precursor in the synthesis of KCC-1 for Pb(II) removal. The extraction of silica was carried out under several extraction methods (alkali fusion (AF), reflux (RF) and microwave heating (MW)) and extraction parameters (NaOH/RHA mass ratio, fusion temperature and H2O/NaOH-fused RHA mass ratio). The highest silica content was obtained using AF method at extraction conditions of NaOH/RHA mass ratio = 2, fusion temperature = 550 ºC, and H2O/NaOH-fused RHA mass ratio = 4, with silica concentration of 85,490 ppm. TEM, FTIR, and BET analyses revealed the synthesized KCC-1 has fibrous morphology with surface area of 220 m2/g. The synthesized KCC-1 showed good performance in removal of Pb(II) from aqueous solution (74%) and petrochemical wastewater (70%). The analyses of petrochemical wastewater revealed that the adsorption process using synthesized KCC-1 effectively decreased the concentration of COD (489 mg/L to 106 mg/L), BOD (56 mg/L to 34 mg/L) and Pb(II) (22.8 mg/L to 6.71 mg/L). This study affirmed that KCC-1 was successfully synthesized using RHA as silica precursor and applied as an efficient adsorbent for Pb(II) removal.