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Using Ce(NO3)3 and coconut shell biochar(CBC) as raw materials, we prepared cerium oxide-modified coconut shell biochar(CO-CBC) via co-precipitation-high-temperature calcination method, and characterized its structure by SEM,EDS,N2 adsorption-desorption isotherm, and pore size distribution curve.Moreover, we studied the adsorption performance of CO-CBC on Glyphosate by using the kinetic model and the isothermal adsorption model, and systematically investigated the effects of CO-CBC dosage, pH value, and co-existent in water on the adsorption process.Furthermore, we revealed the adsorption mechanism by in situ FTIR and surface charge analysis.The results show that CO-CBC has a rough and porous morphology, and its adsorption capacity is 5.66 times that of CBC treated with the same calcination temperature(400-CBC).The adsorption of Glyphosate by CO-CBC is consistent with the pseudo-first-order, pseudo-second-order kinetic models and Freundlich isothermal adsorption model, and the adsorption process includes physical adsorption and multi-molecular layer chemisorption on non-uniform surfaces.CO-CBC binds to the carboxyl and amine groups of Glyphosate through the Ce sites, which is affected by charge effect.This study provides a new strategy for efficient removal of Glyphosate in water.
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Basic Information:
China Classification Code:TQ424;X592
Citation Information:
[1]LI Songyan,YI Xingguo,YU Shuilian ,et al.Efficient Adsorption of Glyphosate by Cerium Oxide-Modified Coconut Shell Biochar and Its Mechanism[J].Chemistry ＆ Bioengineering,2026,43(07):31-38.
Fund Information:
国家自然科学基金项目(22136003,22406106); 湖北省自然科学基金项目(8246106)
2024-10-20
2024
2024-11-28
2024
1
2025-05-28
2025-05-28
2025-05-28