Số phát hành: Số 9 - Tháng 4 - 2026Hóa học - Công nghệ thực phẩm
Preparation and application of modified biochar from rice husk and sugarcane bagasse for crystal violet and Pb(II) removal
Xuất bản: tháng 6 14, 2026
Tóm tắt
This study investigates the preparation and application of modified biochars derived from rice husk and sugarcane bagasse for the removal of crystal violet (CV) dye and Pb(II) ions from aqueous solutions. Four adsorbents, designated RH1, RH2, SG1, and SG2, were produced via carbonization followed by chemical activation of agricultural residues. Adsorption kinetics were evaluated using pseudo-first-order and pseudo-second-order models, with the latter providing a superior fit, particularly for Pb(II) removal (R² ≈ 0.9997–1.000). Structural and surface characterizations using FTIR and SEM analyses revealed that chemical activation enhanced surface heterogeneity and porosity, while functional groups played a key role in pollutant binding. The findings demonstrate that modified biochars derived from agricultural waste represent an efficient and low-cost adsorbent for the simultaneous removal of dyes and heavy metals from wastewater
Ahmad M., Rajapaksha A. U., Lim J. E., Zhang M., Bolan N., Mohan D., Vithanage M., Lee S. S., & Ok Y. S. (2014). Biochar as a sorbent for contaminant management in soil and water: A review. Chemosphere, 99, 19-33. https://doi.org/10.1016/j.chemosphere.2013.10.071.
Foo K. Y., & Hameed B. H. (2010). Insights into the modeling of adsorption isotherm systems. Chemical Engineering Journal, 156(1), 2-10. https://doi.org/10.1016/j.cej.2009.09.013.
Forgacs E., Cserháti T., & Oros G. (2004). Removal of synthetic dyes from wastewaters: A review. Environment International, 30(7), 953-971. https://doi.org/10.1016/j.envint.2004.02.001.
Ho Y. S., & McKay G. (1999). Pseudo-second order model for sorption processes. Process Biochemistry, 34(5), 451-465. https://doi.org/10.1016/S0032-9592(98)00112-5.
Lellis B., Favaro-Polonio C. Z., Pamphile J. A., & Polonio J. C. (2019). Effects of textile dyes on health and the environment and bioremediation potential of living organisms. Biotechnology Research and Innovation, 3, 275-290. https://doi.org/10.1016/j.biori.2019.09.001.
Liu Z., & Zhang F. S. (2009). Removal of lead from water using biochars prepared from hydrothermal liquefaction of biomass. Journal of Hazardous Materials, 167(1-3), 933-939. https://doi.org/10.1016/j.jhazmat.2009.01.085.
Mohan D., Sarswat A., Ok Y. S., & Pittman C. U., Jr. (2014). Organic and inorganic contaminants removal from water with biochar, a renewable, low-cost and sustainable adsorbent: A critical review. Bioresource Technology, 160, 191-202. https://doi.org/10.1016/j.biortech.2014.01.120.
Robinson T., McMullan G., Marchant R., & Nigam P. (2001). Remediation of dyes in textile effluent: A critical review on current treatment technologies with a proposed alternative. Bioresource Technology, 77(3), 247-255. https://doi.org/10.1016/S0960-8524(00)00080-8.
