A new hemicellulose-based adsorbent for malachite green

Utilization of biowaste is an interesting research area to develop new adsorbents. New hemicellulose-based materials were synthesized and further evaluated as malachite green (MG) dye adsorbents. Hemicellulose was extracted from Pinus wallichiana the needles, acetylated, oxidized and modified to carboxyl product. The well-characterized hemicellulose-based materials were applied to remove MG from wastewaters. The acetylated and dicarboxylated hemicellulosic material showed efficient dye adsorption with Langmuir adsorption capacity of 456.23 mg/g. The data was analyzed applying various kinetic and isotherm models, and experimental data closely matched pseudo-second order kinetic model and Freundlich isotherm. The adsorbent exhibited good reusability efficiency when studied up to 16 cycles and was still active for further use.