期刊
WATER AND ENVIRONMENT JOURNAL
卷 32, 期 1, 页码 125-133出版社
WILEY
DOI: 10.1111/wej.12307
关键词
adsorption; agricultural wastes; biochar; heavy metals; low-cost sorbent; pyrolysis; waste management; water treatment
Conversion of agricultural wastes into a carbon rich material (i.e. biochar) using pyrolysis process could be an appropriate approach for their management. This study was carried out to convert barley straw to biochar in different temperatures (300, 400 and 500 degrees C) and to investigate the potential of the produced biochar as a sorbent of heavy metals (Pb and Cd). Considering the pretest results of Pb and Cd sorption, the biochar produced at 500 degrees C (BS500) was selected to find effect of pH, the sorbent dose, the initial concentration of Pb and Cd and the contact time on metal removal efficiency. The results showed that the optimum conditions of adsorption were pH=6, the sorbent dose 1 g/L and the contact time of 45 min. The adsorption kinetics and isotherms had the best fit to the pseudo-second order and Langmuir models, respectively.
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