期刊
NEW JOURNAL OF CHEMISTRY
卷 39, 期 12, 页码 9396-9406出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj01631b
关键词
-
Raw and aspartic acid (ASP)-modified clinoptilolite (in both nano (NCP) and micronized (MCP) dimensions) were studied for their removal of heavy metal cations. The raw and modified samples were characterized by XRD, SEM, BET, TEM, FT-IR, TG and energy dispersive X-ray spectroscopy (EDX). Both raw and modified NCP showed better activity than the corresponding MCP for removal of the tested heavy metals, especially copper cations. The best activity was obtained by NCP modified in ASP solution at pH 6. The removal of Cu(II) ions increased during 300 min contact time. The kinetic isotherms showed that the adsorption kinetic could be well described by the pseudo-second-order rate equation. The Dubinin-Radushkevich and Langmuir isotherms indicated monolayer sorption of Cu(II) on the surface of the adsorbent via a chemical sorption phenomenon. The negative Delta G confirmed an exothermic and spontaneous removal process.
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