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首页> 外文期刊>Particulate Science and Technology: An International Journal >Chromium(VI) removal from aqueous medium by maize cane and agave bagasse biomasses
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Chromium(VI) removal from aqueous medium by maize cane and agave bagasse biomasses

机译：铬（VI）通过玉米甘蔗和龙舌兰甘蔗渣从水性培养基中除去

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摘要

Chromium(VI) is a major water pollutant from industrial effluents whose concentration is to be reduced within the permissible limits. In this paper, the use of maize cane and agave bagasse as inexpensive adsorbent for the removal of Cr(VI) from aqueous solutions is considered. In the first place, they were conditioned and characterized to determine their physicochemical properties with scanning electron microscopy; the elemental composition with energy-dispersive x-ray spectroscopy (EDS); the principal functional groups with Fourier transform infrared spectroscopy; thermal stability with thermogravimetric analysis; and surface properties by specific surface hydration kinetics, point of zero charge determination by mass titration, and active site density are described. In the second place, their adsorption properties for Cr(VI) from aqueous solution were evaluated in a batch system. The kinetics of Cr(VI) sorption with both natural adsorbents were described with a pseudo-second-order model. Equilibrium data were found to be best represented for both adsorbents by the Freundlich isotherm model. Maize cane and agave bagasse can be effectively used as an adsorbents for the removal of Cr(VI) ions from the aqueous solution.
机译：铬（VI）是来自工业污染物的主要水污染物，其浓度在允许的限度内降低。本文认为，考虑使用玉米甘蔗和龙舌兰甘蔗蛋白作为廉价吸附剂，用于从水溶液中除去Cr（VI）。首先，它们被调节并表征以通过扫描电子显微镜确定其物理化学性质;具有能量分散X射线光谱（EDS）的元素组成;具有傅里叶变换红外光谱的主要官能团;热稳定性，具有热重分析;通过特定表面水合动力学，通过质量滴定测定的零电荷测定的表面性能，并描述了有源位点密度。在第二位置，在批量系中评估来自水溶液的Cr（VI）的吸附性能。用伪二阶模型描述了对两个天然吸附剂的Cr（VI）吸附的动力学。发现平衡数据是由Freundlich等温模型的吸附剂最合适的。玉米甘蔗和龙舌兰甘蔗渣可有效地用作去除来自水溶液的Cr（VI）离子的吸附剂。

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