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首页> 外文期刊>Environmental progress & sustainable energy >Removal of methylene blue from aqueous system using tobacco stems biomass: Kinetics, mechanism and single-stage adsorber design
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Removal of methylene blue from aqueous system using tobacco stems biomass: Kinetics, mechanism and single-stage adsorber design

机译：使用烟梗生物质从水系统中去除亚甲蓝的动力学，机理和单级吸附器设计

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摘要

This study investigated the technical feasibility of using the tobacco stems biomass (TSB), as a low-cost novel adsorbent for removal of methylene blue (MB) from water. TSB was characterized by pH zero-point-charge (pH_(ZPC)) and FTIR analysis. Batch adsorption studies were performed to evaluate process variables, kinetics and equilibrium of MB adsorption. Results showed that MB removal was higher at pH values >pH_(ZPC) of adsorbent, and for particle size <0.5 mm. The adsorption kinetics followed pseudo-second order (k_2 = 0.008 to 0.001 g mg~(−1) min~(−1)), with intraparticle diffusion as one of the rate limiting steps. The Langmuir isotherm with maximum capacity of 169.5 mg g~(−1) was statistically found a best fit model. A single stage batch adsorber was designed and quantity of TSB required for treating 1000-10,000 L of stained water was determined. The results imply that the TSB with could be a promising alternative adsorbent for remediation of cationic dye bearing wastewater.
机译：这项研究调查了使用烟梗生物质（TSB）作为低成本新型吸附剂从水中去除亚甲基蓝（MB）的技术可行性。 TSB通过pH零点电荷（pH_（ZPC））和FTIR分析进行表征。进行了批量吸附研究，以评估MB吸附的工艺变量，动力学和平衡。结果表明，在吸附剂的pH值> pH_（ZPC）且粒径<0.5 mm时，MB去除率更高。吸附动力学遵循伪二级（k_2 = 0.008至0.001 g mg〜（-1）min〜（-1）），其中颗粒内扩散是限速步骤之一。统计上发现最大容量为169.5 mg g〜（-1）的Langmuir等温线。设计了单级批量吸附器，并确定了处理1000-10,000 L染色水所需的TSB量。结果表明TSB可能是一种有前途的替代吸附剂，用于修复阳离子染料废水。

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