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Comparative study of phosphates removal from aqueous solutions by nanocrystalline akaganeite and hybrid surfactant-akaganeite

机译:纳米晶赤铁矿和杂化表面活性剂-赤铁矿去除水溶液中磷酸盐的比较研究

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In this study,phosphates removal from aqueous solutions was investigated using synthetic prepared nanocrystalline oxyhydroxide material in unmodified and surfactant modified form.Equilibrium and kinetic studies were carried out to determine the sorption capacity of akaganeite and the rate of phosphate ions uptake.Equilibrium data were analyzed by Langmuir and Freundlich isotherms.The sorption capacity was found to be 59.62 mg P g~(-1) for pure nanocrystalline akaganeite and 451.20 mg P g~(-1) for hybrid surfactant-akaganeite.Kinetic data followed a pseudo-second-order kinetic model.FT-IR spectra indicate the presence of inner-sphere complexes.Desorption studies showed entirely different behaviour between the two materials.
机译:本研究以合成的未改性和表面活性剂改性形式制备的纳米晶羟基氢氧化物从水溶液中去除磷酸盐,并通过平衡和动力学研究确定了赤霞石的吸附能力和磷酸盐离子的吸收速率,并分析了平衡数据。由Langmuir和Freundlich等温线测得,纯纳米晶赤铁矿的吸附容量为59.62 mg P g〜(-1),杂合表面活性剂-赤铁矿的吸附容量为451.20 mg P g〜(-1)。 FT-IR光谱表明存在内球络合物。解吸研究表明两种材料之间的行为完全不同。

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