Synthesis of magnetic material derived from rice straw by hydrothermal carbonization for removal of methylene blue
Abstract
Rice straw, an agricultural waste, was successfully converted into novel magnetic carbon composites by low temperature hydrothermal carbonization. Firstly, rice straw (RS) is pretreated with KOH aqueous solution in stainless-steel autoclave that was Teflon lined and heated at 120 oC for 4 h, the resulting liquid is used to synthesize a black liquor-derived porous carbon. Then, magnetic carbon (MC) is carbonized at 180 oC for 14 h by the hydrothermal method. The obtained samples had a high magnetization (28,1 emu/g) and good adsorption capacity for methylene blue (MB) (qmax = 104,17 mg/g), which promised to become a potential adsorbent.
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