有机废物在吸附Zn(II)和Cd(II)离子中的应用

IF 0.5 4区环境科学与生态学 Q4 ENGINEERING, ENVIRONMENTAL

Environment Protection Engineering Pub Date : 2019-01-01 DOI:10.37190/epe190203

T. Bakalár, H. Pavolová

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引用次数: 3

摘要

采用间歇式吸附实验研究了有机废物-柑桔皮、榛子壳和核桃壳对水溶液中Zn(II)和Cd(II)离子的生物吸附。在生物吸附研究中，测定了平衡金属离子浓度。用Freundlich、Langmuir、Temkin、Dubinin-Radushkevich、Redlich-Peterson、Sips、Toth和Khan等温线对实验数据进行了分析。研究结果表明，柑桔皮、榛子壳和核桃壳可作为低成本的水溶液中Zn(II)和Cd(II)离子的替代材料，其最大吸附量分别为15.51和19.8 mg/g、11.55和16.65 mg/g和26.60和21.10 mg/g。榛子壳对Zn(II)和Cd(II)离子的去除率最高。该过程速度快，所研究的生物吸附剂对金属离子的去除率约为90%。吸附过程可能是发生在非均相表面上的化学吸附。

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Application of organic waste for adsorption of Zn(II) and Cd(II) ions

Biosorption of Zn(II) and Cd(II) ions from aqueous solutions onto organic waste – orange peel, hazelnut shell, and walnut shell was studied using batch adsorption experiments. In the biosorption studies, equilibrium metal ion concentration was determined. Experimental data obtained were analysed in terms of Freundlich, Langmuir, Temkin, Dubinin–Radushkevich, Redlich–Peterson, Sips, Toth, and Khan isotherms. The results of the study showed that orange peel, hazelnut shell, and walnut shell can be adequately used as low-cost alternatives for the removal of Zn(II) and Cd(II) ions from aqueous solutions with maximum sorption capacities of 15.51 and 19.8 mg/g, 11.55 and 16.65 mg/g, and 26.60 and 21.10 mg/g, respectively. The highest removal efficiency of Zn(II) and Cd(II) ions was obtained for hazelnut shells. The process was fast and about 90% of metal ions were removed by all the studied biosorbents. The sorption process was possibly chemisorption occurring on a heterogeneous surface.

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来源期刊

Environment Protection Engineering 环境科学-工程：环境

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

12 months

期刊介绍： Water purification, wastewater treatment, water reuse, solid waste disposal, gas emission abatement, systems of water and air pollution control, soil remediation.