Biosorption Studies of Cyanide Ion from Wastes by Spent Black Tea Leaves
Abstract
The present study is concerned with the adsorption of cyanide ion (CN-) from aqueous solutions using the wastes of spent black tea leaves (SBTL) as an adsorbent Batch adsorption experiments were carried out at equilibrium conditions for concentrations of cyanide ion between 50 and 300mgL-1 .The parameters examined in this study were the effect of contact time ,solution pH , temperature and amount of adsorbent .The results showed that significant amounts about 90% of 50 mgL-1 cyanide ion was removed at 37°C and solution pH= 8.The equilibrium adsorption isotherms have been analyzed by the Freundlich and Langmuir equations using Linearized correlation coefficient at different temperatures. The Freundlich is found the best represent the equilibrium data for cyanide-SBTL system. Thermodynamic parameters were calculated at three different temperatures and the obtained values support the conclusion that the cyanide ion adsorbs by spontaneous and endothermic process. To examine the kinetic of the adsorption process, models of pseudo-first-order and pseudo-second-order were applied. The data showed that the pseudo –second-order model was best-fit model.
Â
Key Words: cyanide ion , Adsorption ,isotherm, spent black tea leaves
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2016 مجلة الكوÙØ© للكيمياء | Kufa Journal for Chemistry
This work is licensed under a Creative Commons Attribution 4.0 International License.
Open-access Statement
The journal « Journal Of Kufa For Chemical Sciences» provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge. Full-text access to scientific articles of the journal is presented on the official website in the Archives section.
This is in accordance with the BOAI definition of open access. The licensing policy is compatible with the overwhelming majority of open access and archiving policies.
The journal «Journal Of Kufa For Chemical Sciences» is an open access journal, which means all its content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author as long as they cite the source.The journal is licensed by Creative Commons Attribution International( CC Attribution 4.0) .