期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 337, 期 1, 页码 122-130出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.05.013
关键词
Heulandite; Toxic metals; Adsorption; Calorimetry; Thermodynamic
资金
- CNPq
- FAPESP
An analogue of heulandite was synthesized by using inorganic salts as a source for silicon and aluminum in the hydrothermal synthesis of the material. The resulting solid was modified by organofunctionalization with 1,4-bis(3-aminopropyl)piperazine and subsequent reaction with methylacrylate in a heterogeneous route. The original (HEU) and modified silicate (HEUAPPMA) samples were characterized by textural analysis, SEM, and nuclear magnetic nuclei of Si-29 and C-13. The chemically modified silicate sample showed modification of its physical-chemical properties including specific area 459.0-978.8 m(2) g(-1). The ability of this material to remove nickel(II), cobalt(II), and copper(II) from aqueous solutions was followed by a series of adsorption isotherms adjusted to a Sips equation. The quick adsorption process reached the equilibrium before 10, 15, and 20 min for Cu(II), Ni(II), and Co(II), respectively, with maximum adsorptions at pH 4.0. Based on the capacity of adsorption of HEUAPPMA to interact with metal ions, the following results were obtained 12.9, 9.8, and 7.5 mmol g(-1) for Cu(II), Ni(II), and Co(II), respectively, reflecting a maximum adsorption order of Cu(II) > Ni(II) > Co(II). The energetic effects caused by metal cation adsorption were determined through calorimetric titrations. (C) 2009 Published by Elsevier Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据