In present study, high surface area (1852m²g⁻¹) activated carbon was synthesized by single step thermo chemical activation of agro-waste lignocellulose biomass (eucalyptus bark).The synthesized activated carbon has been characterized using scanning electron microscopy, energy-dispersive-X-ray spectroscopy and BET surface area analyser. The eucalyptus bark derived activated carbon (EBAC) was used to remove methylene blue (MB) from waste water. The pH, contact time and concentration of dye were optimized and it was found that at pH of 5.5-6.5 at the room temperature, maximum removal of dye was observed. The obtained time data follows the pseudo second order kinetics. The effect of concentration study was carried out with varying concentration at optimized pH and time. The maximum adsorption capacity is obtained to be 7.15 mg/g. To understand the adsorption process, the Dubinin–Radushkevich (D–R) isotherm and Freundlich isotherm were used for fitting of equilibrium data. The fitted data follows D-R isotherm which reveals the physisorption process during adsorption of dye.

中文翻译：

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从桉树皮中合成高表面积活性炭以去除亚甲基蓝

在本研究中，高表面积（1852m ² g ^-1通过单步热化学活化农业废木质纤维素生物质（桉树皮）来合成活性炭，并利用扫描电子显微镜，能量色散X射线光谱和BET表面积分析仪对合成的活性炭进行了表征。桉树皮衍生的活性炭（EBAC）用于去除废水中的亚甲基蓝（MB）。优化了pH，接触时间和染料浓度，发现在室温下pH为5.5-6.5时，观察到染料的最大去除。获得的时间数据遵循伪二级动力学。浓度研究的效果是在优化的pH和时间下以不同的浓度进行的。获得的最大吸附容量为7.15mg / g。要了解吸附过程，Dubinin–Radushkevich（D–R）等温线和Freundlich等温线用于拟合平衡数据。拟合数据遵循DR等温线，DR等温线揭示了染料吸附过程中的物理吸附过程。