ArticleScientific reports2026
Bimetallic aluminum lanthanum modified coffee husk derived nanobiochar for nitrate adsorptive removal: kinetics and isothermal studies.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Adsorption technology is a promising alternative to conventional methods in wastewater treatment owing to its simplicity and efficiency to remove even low-concentration of nitrate (NO₃⁻) and recover it. In this paper, advanced materials based on aluminum-lanthanum (Al-La) modified nanobiochar derived from coffee husk biomass (Al-LaCHNBC) was reported as NO₃⁻ adsorbent. The adsorbent was synthesized by first digesting the coffee husk with acid, followed by a co-precipitation method and characterized by FTIR, XRD, and BET methods. Through a series of batch adsorption experiments, the efficiency of the developed adsorbent for removing NO₃⁻ was evaluated through optimization of experimental parameters such as pH (2), initial concentration of NO₃⁻(20 mg/L), contact time (55 min), and adsorbent dose (40 mg/mL). The study found that an acidic environment (pH of 2) significantly enhanced the uptake processes of NO₃⁻ to obtain a maximum of 98% removal efficiency with the adsorption capacity of 41.75 mg/g. The data strongly adhered to the Freundlich isotherm (R
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