Enhanced Fluoride Adsorption on Aluminum-Impregnated Kenaf Biochar: Adsorption Characteristics and Mechanism
نویسندگان
چکیده
In this study, kenaf, a fast-growing plant, was pyrolyzed to biochar, and the biochar impregnated with aluminum improve its fluoride adsorption capacity. The Al-impregnated kenaf (Al-KNF-BC) at temperatures of 300–700 °C, where specimen treated 300 °C (Al-KNF-300) demonstrated highest kinetics equilibrium by Al-KNF-300 followed pseudo-second-order Langmuir models, respectively. According model, maximum capacity 13.93 mg/g. enthalpy entropy were 37.80 kJ/mol 124.1 J/mol K, Fluoride favorable pH values as low 3, effect anion competition order HCO3− > SO42− NO3− Cl−. A efficiency 99.23% obtained an adsorbent concentration 16.67 g/L, which point decreased from 100 < 1.5 mg/L (the drinking water standard). Based on these results, can be considered effective inexpensive for removing contaminated meet standards.
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ژورنال
عنوان ژورنال: Water Air and Soil Pollution
سال: 2022
ISSN: ['0049-6979', '1573-2932']
DOI: https://doi.org/10.1007/s11270-022-05906-0