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首页> 外文期刊>African Journal of Pure and Applied Chemistry >Removal of methylene blue from aqueous solutions using biochar prepared from Eichhorrnia crassipes (Water Hyacinth)-molasses composite: Kinetic and equilibrium studies
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Removal of methylene blue from aqueous solutions using biochar prepared from Eichhorrnia crassipes (Water Hyacinth)-molasses composite: Kinetic and equilibrium studies

机译：使用从凤眼莲（糖葫芦）-糖蜜复合材料制备的生物炭去除水溶液中的亚甲基蓝：动力学和平衡研究

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A biochar based adsorbent prepared from Eichhornia crassipes-molasses bio-composite was tested for its ability to remove methylene blue from aqueous solutions. Molasses were used as a granulating media for powdered biomass making it easier to prepare the biochar under set conditions. The Biochar adsorbent was prepared by igniting biomass granules at 400°C. A maximum adsorption capacity of 44.13 mg?g-1 was achieved at an optimum pH 8, with a bio-sorbent dosage of 0.8 g and an initial concentration of 50 mg?L-1. Experimental data fitted well onto Freundlich adsorption isotherm with an R2 value of 0.9819. Adsorption processes followed pseudo-second order kinetics with an R2 value of 0.9877. FT-IR spectra reveal typical absorption bands around 1563, 1375 and 1028 cm-1. SEM image show the biochar consisted of irregular particles with a microporous structure and appeared to be fibrous. BET results showed that biochar particles had a surface area of 0.8923 m2?g-1, a pore volume of 0.00246 cm3?g-1 and a pore diameter of 10.87 nm.
机译：测试了从凤眼莲-糖蜜生物复合材料制备的基于生物炭的吸附剂从水溶液中去除亚甲基蓝的能力。糖蜜用作粉状生物质的制粒介质，使得在设定条件下更容易制备生物炭。通过在400℃下点燃生物质颗粒来制备生物炭吸附剂。在最佳pH为8时，最大吸附容量为44.13 mg？g-1，生物吸附剂量为0.8 g，初始浓度为50 mg？L-1。实验数据非常适合Freundlich吸附等温线，R2值为0.9819。吸附过程遵循拟二级动力学，R2值为0.9877。 FT-IR光谱揭示了1563、1375和1028 cm-1附近的典型吸收带。 SEM图像显示生物炭由具有微孔结构的不规则颗粒组成，并且似乎是纤维状的。 BET结果表明，生物炭颗粒的表面积为0.8923m2·g-1，孔体积为0.00246cm3·g-1，孔径为10.87nm。

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