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首页> 外文期刊>Ciência Florestal >CARV?O ATIVADO A PARTIR DE BAMBU ( Bambusa vulgaris ) PARA REMO??O DE AZUL DE METILENO: PREDI??ES PARA APLICA??ES AMBIENTAIS
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CARV?O ATIVADO A PARTIR DE BAMBU ( Bambusa vulgaris ) PARA REMO??O DE AZUL DE METILENO: PREDI??ES PARA APLICA??ES AMBIENTAIS

机译：竹子（寻常的竹子）上的活性煤脱除亚甲基蓝：对环境应用的预测

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Activated carbon (AC) is an essential product for the removal of environmental contaminants, but the high production costs limit its use. In this work, AC was produced from bamboo through simultaneous direct physical-chemical activation (by using phosphoric acid and water steam), at 500 oC for 1 hour, to evaluate its adsorption effectiveness for methylene blue dye (MB). Adsorption kinetic and equilibrium studies at batch system were realized at room temperature (to evaluate the adsorption influence of the MB dye over the produced AC) and the Langmuir and Freundlich isotherms systems were selected for understanding the adsorption process. The produced AC showed a relatively high value of surface area equal to 1354.42 m2.g -1 . The required contact time for the MB to reach equilibrium was 12 hours. The adsorption performance was better delineated by the Langmuir isotherm, which maximum adsorption capacity was of 374.75 mg.g -1 . In addition, the R L dimensionless factor reveled the favorable nature of the adsorption process in the used conditions. The results obtained in this study recommend the use of the produced AC from bamboo in the treatment of the water contaminated by the MB dye, foremost in higher concentrations than limits admitted by the legislation. Finally, complementary researches must be conducted to improve, even more, the quality of the produced material.
机译：活性炭（AC）是去除环境污染物的必不可少的产品，但是高昂的生产成本限制了其使用。在这项工作中，通过同时直接物理化学活化（通过使用磷酸和水蒸气）在500 oC下由竹子制得AC，历时1小时，以评估其对亚甲基蓝染料（MB）的吸附效果。在室温下进行分批系统的吸附动力学和平衡研究（以评估MB染料对生产的AC的吸附影响），并选择Langmuir和Freundlich等温线系统以了解吸附过程。产生的AC显示出相当高的表面积值，等于1354.42m2.g -1。 MB达到平衡所需的接触时间为12小时。朗缪尔等温线更好地描述了吸附性能，其最大吸附容量为374.75 mg.g -1。另外，RL L无量纲因子揭示了在使用条件下吸附过程的有利性质。在这项研究中获得的结果建议使用竹子生产的AC来处理被MB染料污染的水，最重要的是浓度要高于法律允许的极限。最后，必须进行补充研究以进一步提高所生产材料的质量。

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