Equipping an adsorbent with an indicator: a novel composite to simultaneously detect and remove heavy metals from water

被引：43
作者：
Jiang, Hualin [1 ,2 ]
Zhang, Weibo [1 ,2 ]
Chen, Pinghua [2 ]
Zhang, Weiwei [3 ]
Wang, Guoyao [3 ]
Luo, Xubiao [1 ,2 ]
Luo, Shenglian [1 ,2 ]
机构：
[1] Key Lab Jiangxi Prov Persistent Pollutants Contro, Nanchang 330063, Peoples R China
[2] Nanchang Hangkong Univ, Coll Environm & Chem Engn, Nanchang 330063, Peoples R China
[3] Nanchang Hangkong Univ, Jiangxi Engn Lab Optoelect Testing Technol, Nanchang 330063, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 30期
基金：
中国国家自然科学基金;
关键词：
WASTE-WATER; ADSORPTION; CU(II); FE(III); NI(II); CO(II); IONS; ACID;
D O I：
10.1039/c6ta04885d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel composite that can simultaneously detect and remove heavy metals was prepared in this study. Its adsorption ability rivals that of excellent traditional adsorbents; furthermore, it can change the color to identify the adsorbate and its concentration. The color changes are very easy to detect via the naked eye or with a photometer. This novel adsorbent can remove a large amount of heavy metal ions, and also qualitatively and quantitatively detect heavy metal ions in water. Cu(II) and Fe(II) were used to investigate the detection and removal properties of the composite, and SEM, BET, FTIR, zeta potential and XPS were used to physicochemically characterize it. Batch sorption experiments were conducted to study the effects of various factors such as pH, the presence of coexisting metal ions, the contact time and the initial metal concentration. The studies indicated that the adsorption process fits well to the Langmuir model, and the kinetic data could be described very well by the pseudo-second-order kinetic model. The mechanism of adsorption has been discussed in detail. This study provides a simple method for the preparation of smart adsorbents.
引用
收藏
页码：11897 / 11907
页数：11
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