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首页> 外文期刊>Journal of King Saud University >A facile approach to develop industrial waste encapsulated cryogenic alginate beads to sequester toxic bivalent heavy metals
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A facile approach to develop industrial waste encapsulated cryogenic alginate beads to sequester toxic bivalent heavy metals

机译：开发工业废物的容易方法包封过低温海藻酸盐珠子，以螯合有毒二价重金属

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Herein, a solid industrial waste management approach converting silico-manganese fumes (SMF) waste to SMF impregnated cryogenic alginate beads (SMFCAB) and its applicability to remove potentially toxic cadmium Cd(II) and lead Pb(II) was proposed. Infra-red, elemental, and XPS analysis data supported the formation SMFCAB. Morphologically, pristine SMFCAB surface was synonymous to cauliflower with agglomerated and interconnected particles. The respective XPS spectral peaks for Cd(II) and Pb(II) at 408 and 144.5?eV binding energies confirmed their adsorption on SMFCAB. The adsorption was pH dependent, with maximum uptakes at pH: 5.5 (for Pb(II)) and 7.2 (for Cd(II)). Contact time studies depicts comparatively rapid Pb(II) adsorption, accomplishing 72% adsorption in 10?min, while only 50% Cd(II) adsorption was accomplished within same time slot. The adsorption data at varied temperatures was fitted to Freundlich isotherm model, while kinetics data was fitted to pseudo-second-order model. Exothermic adsorption process with maximum monolayer adsorption capacities (qm) on SMFCAB were 200?mg/g (for Pb(II)) and 178.6 (for Cd(II)) at 298?K. Hydrochloric acid (0.01?M) eluted maximum amount of metal ions.
机译：在此，提出了一种将硅氟化烟雾（SMF）废物转化为SMF浸渍的低温藻酸盐珠粒（SMFCAB）的固体工业废物管理方法及其用于去除潜在有毒镉CD（II）和铅Pb（II）的适用性。红外线，元素和XPS分析数据支持地图SMFCAB。形态学上，原始Smfcab表面与具有附聚和相互连接的颗粒的花椰菜同义。在408和144.5的CD（II）和Pb（II）的各自的XPS光谱峰值在408和144.5℃下进行粘合能证实了它们对SMFcab的吸附。吸附依赖于pH值，pH下的最大上贴：5.5（对于PB（II））和7.2（用于CD（II））。接触时间研究描述了相对快速的Pb（II）吸附，在10≤min的情况下完成72％的吸附，而在同一时隙内仅完成50％CD（II）吸附。变化温度下的吸附数据适用于Freundlich等温模型，而动力学数据适用于伪二阶模型。在SMFCAB上具有最大单层吸附容量（QM）的放热吸附过程为200〜Mg / g（对于Pb（II））和178.6（用于CD（II）），在298℃下）。盐酸（0.01μm）洗脱最大金属离子量。

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