Investigation of the Pb(II) adsorption from aqueous solution using biochar derived from ground coffee
DOI:
https://doi.org/10.62239/jca.2026.047Keywords:
Biochar, biosorption, Pb(II), ground coffeeAbstract
The adsorption of Pb(II) onto ground coffee-derived biochar from aqueous solution was studied. The prepared biochar was characterised using XRD, BET, FT-IR, and SEM. Effects of pH, adsorption time and initial concentration of Pb(II) were studied. The obtained results show that at an initial Pb(II) concentration of 48 mg/L and pH 5.5 (307 K), the adsorption reached equilibrium after 90 min with a removal efficiency of approximately 52%. The experimental data fitted best the Redlich-Peterson isotherm model, followed by the Langmuir, Temkin and Freundlich models, respectively. The maximum adsorption capacity calculated from the Langmuir model at 307K was 13.04 mg/g. These results indicate that ground coffee is a friendly, inexpensive and potential raw material for the preparation of biochar used as a bio-adsorbent to remove Pb(II) from effluent.
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Data available on request from the authors.
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Copyright (c) 2026 Nguyen Quang Tu Le, Thi-Phuong-Tu Nguyen, Bich-Ngoc Duong, Nguyen-Kim-Tuyen Pham, Van-Phuc Dinh
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Trường Đại học Nguyễn Tất Thành
Grant numbers 2024.01.105
