文章基本信息

标题：Synthesis, electron microscopy properties and adsorption studies of Zinc (II) ions (Zn 2+) onto as-prepared Carbon Nanotubes (CNTs) using Box-Behnken Design (BBD)
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作者：Ahmed Aliyu
期刊名称：Scientific African
印刷版ISSN：2468-2276
出版年度：2019
卷号：3
页码：1-10
DOI：10.1016/j.sciaf.2019.e00069
语种：English
出版社：Elsevier
摘要：Highlights•Carbon nanotubes was prepared using catalytic chemical vapor deposition technique for the removal of Zn2+in a batch-mode process.•Adsorption process parameters were simultaneously optimized using Box-Behnken design of experiments.•Adsorption isotherms and kinetic models were used to verify adsorption performance of the as-prepared carbon nanotubes in the removal of Zn2+ion.AbstractThe high levels of zinc (II) ions (Zn2+) have long been harmful to the environment and this study explored the feasibility of adsorption of Zn2+on as-prepared carbon nanotubes (CNTs) from simulated aqueous solutions in batch-model process. The as-prepared CNT using chemical vapor deposition (CVD) technique was systematically characterized using electron microscopy techniques. Effects of adsorption parameters were modeled using Box-Behnken design (BBD) of experiment and 99.50% Zn2+ions removal was achieved at adsorbent dosage, 50 mg; pH, 6.0; contact time, 60 min and contact speed, 125 rpm. The Langmuir, Freundlich and Temkim adsorption isotherms were used to verify the as-prepared CNTs adsorption performance. It was found that the adsorption data were well fitted to the Langmuir model. Moreover, the kinetic studies revealed that the adsorption kinetic data follows a pseudo-second-order model. The results indicate high prospect of the as-prepared CNTs for Zn2+ion removal.
关键词：KeywordsCarbon nanotubesCharacterizationBatch adsorptionBox-Behnken designAdsorption isothermsKinetic study