具有高效镉吸附性能的新型磁性海藻酸盐/羟基磷灰石复合材料

Pub Date : 2024-02-06 DOI:10.17222/mit.2023.927

Xiao Xiao, Jiabei Zhou, Dali Zhou, Liang Li, Yingjiang Wu, Xiang Zhou, Lang Du, Honggen Chen

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引用次数: 0

摘要

重金属污染（如 Cd(II)）被认为是一个严重的环境问题，对人类构成了极大的威胁。本研究采用简便的湿化学方法，成功合成了一种具有高效 Cd(II) 吸附性能的新型水分散磁性海藻酸盐/羟基磷灰石复合材料。磁分离实验和磁性能分析表明，磁性海藻酸盐/羟基磷灰石复合材料可在磁场下有效分离。zeta电位结果和分散性实验表明，pH=5时的最低zeta电位为-39.4 mV，120分钟后，所得到的样品在Cd(II)溶液中分散良好。在 pH = 5 时，样品对 Cd（II）的最大吸附容量为 135.3 mg g-1，10 分钟后 Cd（II）的吸附达到平衡。利用 Langmuir 模型可以很好地拟合吸附数据，吸附动力学遵循假二阶动力学模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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NOVEL MAGNETIC ALGINATE/HYDROXYAPATITE COMPOSITE WITH HIGH-EFFICIENCY CADMIUM-ADSORPTION PERFORMANCE

Heavy-metal pollution (such as Cd(II)) is regarded as a serious environmental problem, posing a great threat to human beings. In this research, a novel water-dispersible magnetic alginate/hydroxyapatite composite with high-efficiency Cd(II) adsorption performance was successfully synthesized by a facile wet-chemical method. The magnetic separation experiment and magnetic property analysis indicate that a magnetic alginate/hydroxyapatite composite can be effectively separated under a magnetic field. The zeta-potential result and dispersity experiment indicate that the lowest zeta-potential is –39.4 mV at pH = 5, and the obtained sample dispersed well in a Cd(II) solution after 120 min. The maximum adsorption capacity of a sample on Cd(II) is 135.3 mg g–1 at pH = 5, and the adsorption of Cd(II) reached equilibrium in 10 min. The adsorption data could be fitted well using the Langmuir model, and the adsorption kinetic follows a pseudo-second-order kinetic model.

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