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首页> 外文期刊>Environmental research >Production of new activated bio-carbons by chemical activation of residue left after supercritical extraction of hops
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Production of new activated bio-carbons by chemical activation of residue left after supercritical extraction of hops

机译：通过啤酒花超临界萃取后残留物的化学活化来生产新的活化生物碳

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AbstractA technology of activated bio-carbons production from the residue left after supercritical extraction of hops is described. The effect of the variant of chemical activation and impregnation ratio on the physicochemical properties as well as sorption capacity towards toxic gas of acidic character (nitrogen dioxide), basic organic dye (aqueous solution of methylene blue - MB) and iodine was investigated. The materials obtained were activated bio-carbons of well-developed surface area ranging between 897 and 1095m2/g, showing clearly acidic character of the surface. The sorption tests results proved that chemical activation of the residue left after supercritical extraction of hops allows obtaining activated bio-carbons with very high sorption capacity towards nitrogen dioxide, reaching to 77.2 and 155.3mg/g in dry and wet conditions, respectively. The maximum sorption capacity of the adsorbents towards methylene blue was 328.75mg/g, while towards iodine 1815mg/g. The equilibrium data for aqueous solution of MB were analyzed by the Langmuir and Freundlich models, whereas the kinetics of the adsorption process was studied using pseudo-first and second-order models. According to the obtained data, the adsorption of MB from aqueous solution is better described by Langmuir model and pseudo-second order kinetic model.Highlights•An alternative method for bio-waste utilization has been proposed.•Activated bio-carbons were prepared from hops by Na2CO3activation.•The activated bio-carbons has been used for NO2, methylene blue and iodine adsorption.
机译： 摘要 描述了一种从啤酒花超临界萃取后残留的残渣中生产活性生物碳的技术。研究了化学活化和浸渍比例的变化对理化性质以及对酸性（二氧化氮），碱性有机染料（亚甲基蓝-MB的水溶液）和碘对有毒气体的吸附能力的影响。所获得的材料是表面积在897至1095m 2 / g之间的发达的活性生物碳，具有明显的酸性特征。吸附测试结果证明，啤酒花超临界萃取后残留物的化学活化可以得到对二氧化氮具有极高吸附能力的活化生物碳，在干燥和潮湿条件下分别达到77.2和155.3mg / g。吸附剂对亚甲基蓝的最大吸附容量为328.75mg / g，而对碘为1815mg / g。 MB水溶液的平衡数据通过Langmuir和Freundlich模型进行了分析，而吸附过程的动力学则使用伪一级和二级模型进行了研究。根据获得的数据，用Langmuir模型和伪二级动力学模型可以更好地描述MB从水溶液中的吸附。 < ce：abstract xmlns：ce =“ http://www.elsevier.com/xml/common/dtd” xmlns =“ http://www.elsevier.com/xml/ja/dtd” id =“ ab0015” class = “ author-highlights” view =“ all”> 突出显示 < ce：simple-para id =“ sp0085” view =“ all”> • 已提出了一种利用生物废物的替代方法。 • Na 从啤酒花中制备了活化的生物碳。 2 CO 3 激活。 • 激活ed生物碳已用于NO 2 ，亚甲基蓝和碘的吸附。

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