Journal ArticleDOI
Chelating polymers and related supports for separation and preconcentration of trace metals.
TLDR
This review is concerned mainly with the applications of chelating polymeric resins for the separation and concentration of trace metals from oceans, rivers, streams and other natural systems.Citations
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Chemical modification of silica surface by immobilization of functional groups for extractive concentration of metal ions.
TL;DR: Increased utilization of mechanically stable synthetic matrices particularly silica gel as a solid support and its surface modification by impregnation of organic ligands directly or covalent grafting through spacer unit for extractive concentration of trace elements are highlighted in the present article.
Journal ArticleDOI
Adsorption characteristics of heavy metal ions onto a low cost biopolymeric sorbent from aqueous solutions
Nuri Ünlü,Mustafa Ersoz +1 more
TL;DR: It was observed that chelating effect is also playing an important role in the adsorption of metal ions onto sporopollenin, and advertisersorption mechanism for the adsorbent was explained as an ion-exchange process.
Journal ArticleDOI
Heavy Metal Ion Adsorbents Formed by the Grafting of a Thiol Functionality to Mesoporous Silica Molecular Sieves: Factors Affecting Hg(II) Uptake
TL;DR: In this paper, a new approach to heavy metal ion adsorbents based on the covalent grafting of 3-mercaptopropylsilyl groups to the framework pore walls of mesoporous silica molecular sieves has been investigated with regard to hydroxyl group densities, channel dimensions, and morphologies.
Journal ArticleDOI
Introduction of amino groups into acid-resistant MOFs for enhanced U(VI) sorption
Zhi-Qiang Bai,Zhi-Qiang Bai,Li-Yong Yuan,Lin Zhu,Zhirong Liu,Shengqi Chu,Lirong Zheng,Jing Zhang,Zhifang Chai,Wei-Qun Shi +9 more
TL;DR: In this article, the acid-resistant chromium-based MOF, MIL-101, and its amino derivatives were prepared to explore their potential usage in separation, removal and/or recovery of radionuclides from aqueous solutions.
References
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Journal ArticleDOI
Hard and soft acids and bases
TL;DR: In this paper, the rate data for the generalized nucleophilic displacement reaction were reviewed, and the authors presented a method to estimate the rate of the generalized displacement reaction in terms of the number of nucleophiles.
Journal ArticleDOI
Chelating resins for the concentration of trace elements from sea water and their analytical use in conjunction with atomic absorption spectrophotometry
J.P. Riley,D. Taylor +1 more
TL;DR: In this paper, an investigation was made of the uptake of trace elements from both distilled water and sea water by the chelating ion-exchange resins Chelex-100 and Permutit S1005.
Journal ArticleDOI
An improved metal extraction procedure for the determination of trace metals in sea water by atomic absorption spectrometry with electrothermal atomization
TL;DR: In this paper, a rapid carbamate extraction method with pyrrolidinedithiocarbamate (PDI) and diethyldithionic carbamate (DHC) was described for the simultaneous determination of Cd, Co, Cu, Fe, Ni, Pb and Zn in sea water by atomic absorption spectrometry with a graphite atomizer.
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