超顺磁性聚苯乙烯-共丙烯酸水凝胶吸附Zn2+的动力学和热力学研究

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry Pub Date : 2016-04-02 DOI:10.1080/15533174.2014.988797

N. Sharma, A. Tiwari

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引用次数: 0

摘要

研究了超顺磁性纳米氧化铁负载聚苯乙烯-共丙烯酸水凝胶对水溶液中Zn2+离子的间歇吸附去除效果。考察了pH、接触时间、吸附剂剂量、温度和金属离子浓度对去除过程灵敏度的影响。在提出的各种动力学模型中，伪二阶似乎是最适合实验数据的。不同的热力学参数ΔG0， ΔH0和ΔS0也进行了评估。在室温(25°C)下，pH为7时，在120 min内Zn2+离子的最大去除率为95%。

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Kinetic and Thermodynamic Studies of Zn2+ Adsorption Onto Superparamagnetic Poly (styrene-co-acrylic acid) Hydrogel

The present research focuses on removal efficiency of superparamagnetic nano iron oxide loaded poly (styrene-co-acrylic acid) hydrogel for Zn2+ ions from aqueous solution by batch adsorption technique. The influence of pH, contact time, adsorbent dose, temperature, and metal ion concentration on the sensitivity of the removal process was inspected. Out of various kinetic models proposed, the pseudo second order seems to fit in the experimental data in the best way. Different thermodynamic parameters ΔG0, ΔH0, and ΔS0 have also been evaluated. The maximum percentage removal of Zn2+ ions (95%) was obtained at pH 7 in 120 min at room temperature (25°C).

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来源期刊

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 工程技术-纳米科技

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审稿时长

5 months