Philippine Journal of Science
152 (5): 1579-1593, October 2023
ISSN 0031 – 7683
Date Received: 16 Feb 2023
Production of Biochar from Coconut Husks
for Adsorption of Heavy Metals in Water
Vo Cong Minh1,2,3, Nguyen Thi Le Lien3,4*, Nguyen Thi Thuy3,5
Le Thi Kim Phung3,4, and Nguyen Nhat Huy2,3*
1Faculty of Chemistry, Ho Chi Minh City University of Education (HCMUE),
280 An Duong Vuong Street, District 5, Ho Chi Minh City, Vietnam
2Faculty of Environment and Natural Resources,
Ho Chi Minh City University of Technology (HCMUT),
268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
3Vietnam National University Ho Chi Minh City,
Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
4Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT)
268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
5School of Chemical and Environmental Engineering, International University,
Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
*Corresponding author:
ntllien@hcmut.edu.vn; nnhuy@hcmut.edu.vn
[Download]
Vo CM et al. 2023. Production of Biochar from Coconut Husks for
Adsorption of Heavy Metals in Water. Philipp J Sci 152(5): 1579–1593.
https://doi.org/10.56899/152.05.05
ABSTRACT
This study focused on the production, characterization, and application of biochar from coconut husks as an effective and cheap adsorbent for the removal of heavy metals (i.e. Pb, Fe, Mn, and Cr) in water. The biochar was produced by pyrolysis of coconut husk at 600 °C in oxygen free conditions and then characterized by various surface analysis technologies to explore its physical and chemical properties. In the metal adsorption test, the produced biochar gave high metal removal performance with maximum adsorption capacities of 95.24 mgPb2+/g, 40.16 mgFe2+/g, 35.46 mgCr6+/g, and 23.09 mgMn2+/g under pH 5, 4.5, 2, and 5.5, respectively. Studies in kinetics, isotherms, thermodynamics, and mechanism were then conducted to understand the adsorption process of metal ions in water using coconut husk biochar.