文章基本信息

标题：Removal of lead from aqueous solution by walnut shell
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作者：Radka Wolfov&a ; Eva Pertile ; Peter Fečko 等
期刊名称：Journal of Environmental Chemistry and Ecotoxicology
电子版ISSN：2141-226X
出版年度：2013
卷号：5
期号：6
页码：159-167
DOI：10.5897/JECE09.025
语种：English
出版社：Academic Journals
摘要：The paper deals with the study of nuts of European walnut (Juglans regia) arising as waste from the agricultural production for the removal of heavy metals from aqueous solutions. The suitability of the given biosorbent was verified through the determination of its adsorption capacity (equilibrium) and rate (kinetics) of adsorption of the studied metal (lead). The shells of the European walnut were first activated by 0.1M of HCl and 0.1M of NaOH, while the activation by sodium hydroxide was more effective than activation by HCl. In order to identify the most suitable method of activation for the given biosorbent, biosorption of European walnut shells activated by NaOH at concentrations of 0.01, 0.1, 1 and 2mol/L was further studied, and the time of activation was 5,15,30 and45 min. The output analyses imply that the most effective chemical treatment of the biosorbent is the activation of European walnut shells by means of NaOH at concentration of 1mol/L for 30min. However, also activation by sodium hydroxide at concentration of 1 mol/L for 15min is suitable, which is very important with regard to the economy in time.
关键词：Biosorption; heavy metals; adsorption capacity; biosorption kinetics; isotherms; walnut shell; biosorbent.