Biochars (BCs) have various functional groups as well as porous structures owing to their low pyrolysis temperature. In this study, various BCs were prepared from pine wood powder as adsorbents for the removal of heavy metals and benzene. To improve t...
Biochars (BCs) have various functional groups as well as porous structures owing to their low pyrolysis temperature. In this study, various BCs were prepared from pine wood powder as adsorbents for the removal of heavy metals and benzene. To improve the adsorption capacity for heavy metals, BCs were entrapped in calcium alginate (Alg) hydrogel beads. Adsorption properties of Alg/BC for cupper ions and benzene were highly dependent on the pyrolysis condition to prepare BC and the mixing ratio of Alg and BC. Moreover, carboxymethyl cellulose (CMC) was blended with Alg/BC to make re-swellable composite beads which can be easily re-swell after drying condition. Finally, Alg/CMC/BC hydrogel beads were eco-friendly prepared with cheap price and proved to be used as commercial adsorbents for heavy metals and organic compounds including benzene.