Adsorption of chromium ions using two types of aqueous biochar

safa yassin

doi:10.69923/2nrc6545

Authors

safa yassin The General Directorate for Education of Diyala Author https://orcid.org/0009-0002-6683-8589

DOI:

https://doi.org/10.69923/2nrc6545

Keywords:

Biochar, adsorption, Chromium ions Cr(VI).

Abstract

Biochar is a porous, carbon-rich substance created when biomass is thermally broken down in an oxygen-limited environment. The removal of chromium ions from polluted water has been extensively investigated because of its large surface area and surface functional groups. This study observes the production of biochar from a variety of biomass sources, such as Pomegranate husks (Po-Biochar) and animal waste (An-Biochar), and assesses how well these methods remove Cr(VI) from aqueous solutions. FTIR, FE-SEM, and BET were used to describe the biochar samples. The effects of pH, contact duration, Cr(VI) concentration, and biochar dose were evaluated using adsorption studies. According to the data, An-Biochar exhibited the maximum adsorption capacity. The adsorption process also followed pseudo-second-order kinetics, and the Freundlich isotherm was found to be the best one that can describe the adsorption of chromium ions Cr(VI) over Po-Biochar and An-Biochar samples, compared with the Langmuir isotherm, all of which were noted from the correlation coefficient values R².

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Author Biography

safa yassin, The General Directorate for Education of Diyala

Safa A.Yassin holds a master’s degree in physical chemistry and is a lecturer in the general direction for Diyala education.

safaahmed072@gmail.com

References

[1] E. Kingsley et al., "Effect of hexavalent chromium on the environment and removal techniques: A review," J. Environ. Manage., vol. 280, p. 111809, 2021, doi: 10.1016/j.jenvman.2020.111809.

[2] S. Pooja, P. Surendra, K. Sheetal, and W. Yen, "Health hazards of hexavalent chromium (Cr (VI)) and its microbial reduction," Bioengineered, vol. 13, no. 3, pp. 4923–4938, 2022, doi: 10.1080/21655979.2022.2037273.

[3] S. Ewa, J. Karolina, and P. Agnieszka, "Chromium (III) and chromium (VI) as important players in the induction of genotoxicity – current view," Ann. Agric. Environ. Med., vol. 28, no. 1, pp. 1-10, 2021, doi: 10.26444/aaem/118228.

[4] K. Aisha et al., "Hydrochar as a bio-based adsorbent for heavy metals removal: A review of production processes, adsorption mechanisms, kinetic models, regeneration and reusability," Sci. Total Environ., vol. 945, p. 173972, 2024, doi: 10.1016/j.scitotenv.2024.173972.

[5] A. Jose, F. Jose, C. Leonidas, R. Igor, and S. Teogenes, "Influence of pyrolysis temperature and feedstock on the properties of biochars produced from agricultural and industrial wastes," J. Anal. Appl. Pyrolysis, vol. 149, p. 104839, 2020, doi: 10.1016/j.jaap.2020.104839.

[6] A. Reyhanitabar, E. Farhadi, H. Ramezanzadeh, and S. Oustan, "Effect of pyrolysis temperature and feedstock sources on physicochemical characteristics of biochar," J. Agric. Sci. Technol., vol. 22, no. 2, pp. 547-561, 2020. doi:10.22092/ijsr.2021.353431.582.

[7] S. Saroop et al., "Analyzing the impacts of three types of biochar on soil carbon fractions and physiochemical properties in a corn-soybean rotation," Chemosphere, vol. 184, pp. 473-481, 2017, doi: 10.1016/j.chemosphere.2017.05.165.

[8] M. Yichuan, Z. Shuting, and W. Jianlong, "Adsorption of heavy metals by biochar in aqueous solution: A review," Sci. Total Environ., vol. 968, p. 178898, 2025, doi: 10.1016/j.scitotenv.2025.178898.

[9] W. Yizhuo, L. He, and L. Shaohua, "Advances in the study of heavy metal adsorption from water and soil by modified biochar," Water, vol. 14, no. 23, p. 3894, 2022, doi: 10.3390/w14233894.

[10] V. Maria, J. Joan, V. Mariano, C. Eva, D. Belen, and J. Francisco, "Influence of feedstock and final pyrolysis temperature on breaking strength and dust production of wood-derived biochars," Sustainability, vol. 13, no. 21, p. 11871, 2021, doi: 10.3390/su132111871.

[11] Y. Ahmed et al., "Effect of pyrolysis temperature on biochar microstructural evolution, physicochemical characteristics, and its influence on biochar/polypropylene composites," Appl. Sci., vol. 9, no. 6, p. 1149, 2019, doi: 10.3390/app9061149.

[12] R. Narzari, N. Bordoloi, B. Sarma, L. Gogoi, N. Gogoi, and B. Borkotoki, "Fabrication of biochars obtained from the valorization of biowaste and evaluation of its physicochemical properties," Bioresour. Technol., vol. 242, pp. 324–328, 2017, doi: 10.1016/j.biortech.2017.04.050.

[13] L. Yongliang, H. Zhongqi, and U. Minori, "Comparison of biochar formation from various agricultural by-products using FTIR spectroscopy," Mod. Appl. Sci., vol. 9, no. 4, 2015, doi: 10.5539/mas.v9n4p246.

[14] M. Muhajir, C. Yonas, and T. Beteley, "Kinetics, adsorption isotherms, thermodynamics, and desorption studies of cadmium removal from aqueous solutions using bamboo sawdust/rice husk biochar," Biomass Convers. Biorefin., 2022, doi: 10.1007/s13399-022-03472-3.

[15] T. Prasetyo et al., "Adsorption isotherm model of Hg2+ with biochar from young coconut waste," IOP Conf. Ser.: Earth Environ. Sci., vol. 1297, p. 012093, 2024, doi: 10.1088/1755-1315/1297/1/012093.