| Abstrakt: |
In the present study, the ability of four different adsorbents (raw sawdust, raw olive pomace and their derived biochars obtained after pyrolysis) to remove Cu(II) from water was investigated. The derived biochars were prepared using the traditional process of earth mound kilns at a temperature close to 300 °C. The influence of solid charge, contact time, pH, and concentration was studied. The adsorption equilibrium was reached in less than 15 min for sawdust, its biochar, and for olive pomace, and in about 1 h for olive pomace-derived biochar. In the studied conditions where only adsorption occurred in absence of Cu precipitation, the maximum adsorption capacities were determined equal to 4.9, 13.1, 14.9, and 50.8 mg.g−1 for olive pomace-biochar, olive pomace, sawdust, and sawdust-biochar, respectively. Thus, the pyrolysis enhanced the adsorption capacities of sawdust but decreased the ones of olive pomace. This study evidenced that raw olive pomace and sawdust as well as their biochar traditionally prepared, may be used as sustainable, low-cost and efficient adsorbents for Cu(II) removal from aqueous solution. [ABSTRACT FROM AUTHOR] |
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