Abstract
Biochar was prepared from rice straw using hydrothermal carbonization method which consisted of zinc chloride treatment. The effects of hydrothermal temperature, time and biomass/water rate on methylene blue removal from aqueous solution were investigated. Besides, response surface modeling (RSM) and the central composite design – face centered (CCF) method will be used in designing experiments. It was found that the optimal conditions for high efficiency of biochar were such that: temperature of 194.07 °C, 9.00 hours and biomass/water ratio of 10 wt%, which resulted methylene blue removal of 92.56 %.
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