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SYNTHESIS AND CHARACTERIZATION OF BIOCHAR FROM ALGAE
Abstract
Biochar samples were obtained by hydro-pyrolysis (600-800oC) of spent algae material, remaining after extraction of the liquid substances from algae for biodiesel production. The pore structure of the obtained carbon was studied by nitrogen adsorption at -196oC. The most prospective algae biochar sample obtained is distinguished by moderate surface area of 490 m2/g, as well as considerable microporosity (0.15 cm3/g) and mesoporosity (0.13 cm3/g). Pore size distribution show that the pores with size 1-3 nm prevail. Presence of oxygen functional groups with weak acid and basic nature was established on the carbon surface, due to significant O/C ratio in algae residue after biodiesel production. The results show that obtained carbon could be used as adsorbent for organic pollutants and metal ions. This investigation intends to find successful utilization of industrial waste after biodiesel production from algae, as well as aims to obtain valuable products ? carbon adsorbents for water purification.
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