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首页> 外文期刊>Journal of the Institute of Brewing >Brewery spent grain: a potential biosorbent for hexavalent chromium
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Brewery spent grain: a potential biosorbent for hexavalent chromium

机译：啤酒花谷物：六价铬的潜在生物吸附剂

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Spent grain is a solid waste from the brewery process which is used as feed for ruminants or as organic fertiliser. Due to the large scale generation of spent grain, new technological and industrial applications are being developed. In this work, spent grain was modified by chemical treatments for use in the biosorption of hexavalent chromium. For spent grain treated with acid, alkali, petroleum ether and hydrogen peroxide, the amount of hexavalent chromium removed was respectively 97, 21, 0.9 and 0.5%. The kinetic data of spent grain biosorbent treated with acid, untreated and treated with alkali were applied to pseudo-first order, pseudo-second order and intraparticle diffusion models. The pseudo-second order model showed the best fit to the kinetic data, indicating chemisorption in the biosorption processes. The effects of pH and biosorbent concentration were analysed for spent grain treated with acid. The optimum values for pH and concentration of the biosorbent were pH 2 and 2 g/L.
机译：花谷物是啤酒厂的固体废物，用作反刍动物的饲料或作为有机肥料的饲料。由于花费的大规模产生了大规模的粮食，正在开发新的技术和工业应用。在这项工作中，通过化学处理来修饰花谷物，用于六价铬的生物吸附。对于用酸，碱，石油醚和过氧化氢处理的废谷物，除去的六价铬的量分别为97,21,0.9和0.5％。用酸处理的废谷物生物吸船的动力学数据，用碱金属处理并用碱处理，对伪第一顺序，伪二次阶和粒地区扩散模型应用。伪二次阶模型显示最适合动力学数据，表明生物吸附过程中的化学吸附。分析了用酸处理的花谷物的pH和生物吸附剂浓度的影响。 pH的最佳值和生物吸附剂的浓度为pH 2和2g / L.

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