In this study, activated carbon was developed from saw-dust by pyrolysis. The activated carbon was characterized for elemental composition, morphology and surface chemistry. The potential of the prepared activated carbon for the removal of methylene blue (MB) from aqueous solution was investigated. Batch adsorption experiments were conducted to evaluate the adsorption isotherm, kinetic and thermodynamic of MB onto saw-dust activated carbon. The MB removal efficiency was 99.2% and the Lamgmuir isothermal model having correlation coefficient ( R 2 ) of 0.98 gave the best fit. The kinetics of MB adsorption onto activated carbon was described with the pseudo second order model indicates the dominance of chemisorption mechanism. Thermodynamic parameters showed that the adsorption of MB on saw dust activated carbon adsorbent was endothermic in nature and a non-spontaneous process. The activation energy of 34.7 kJ/mol further reveals that the adsorption process was chemisorption. Generally, the results suggest that the saw-dust activated carbon is a viable adsorbent for effective removal of MB from wastewater effluent contaminated with dye.

中文翻译：

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通过热解和亚甲基蓝吸附法从木屑中制备活性炭

在这项研究中，活性炭是通过热解从锯末产生的。表征了活性炭的元素组成，形态和表面化学性质。研究了制备的活性炭用于从水溶液中去除亚甲基蓝（MB）的潜力。进行了批量吸附实验，以评估MB在锯末活性炭上的吸附等温线，动力学和热力学。MB去除效率为99.2％，相关系数（R 2）为0.98的Lamgmuir等温模型给出了最佳拟合。用伪二级模型描述了MB在活性炭上的吸附动力学，表明了化学吸附机理的优势。热力学参数表明，MB在锯末活性炭吸附剂上的吸附是吸热的，是非自发过程。34.7 kJ / mol的活化能进一步揭示了吸附过程是化学吸附。通常，结果表明，锯末活性炭是一种有效吸附剂，可以有效地从被染料污染的废水中去除MB。