Abstract
Isolation of lignin commonly was conducted at a high temperature. This paper studies the isolation of lignin from rice husk at low temperature (30 °C) using alkaline hydrogen peroxide (AHP). Optimization of processes variables such as the volume of solvent to the weight of rice husk ratio, H2O2 concentration and pH were done using response surface methodology (RSM) with the central composite design. Characteristic of lignin obtained was analyzed by FT-IR (Fourier Transform Infrared). The results show that the main factor affecting the process isolation is pH both in linear and quadratic. The are several differences characteristics of rice husk lignin isolated at low temperature compared with rice husk lignin isolated at high temperature.
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