scholarly journals Microwave Irradiation-Assisted Synthesis of a Novel Crown Ether Crosslinked Chitosan as a Chelating Agent for Heavy Metal Ions (M+n)

Molecules ◽  
2010 ◽  
Vol 15 (9) ◽  
pp. 6257-6268 ◽  
Author(s):  
Awwad A. Radwan ◽  
Fars K. Alanazi ◽  
Ibrahim A. Alsarra
Keyword(s):  
Heavy Metal ◽  
Crown Ether ◽  
Microwave Irradiation ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Chelating Agent ◽  
Crosslinked Chitosan

Biodegradable chelating agent for heavy metal ions removal

2016 ◽  
Vol 51 (15-16) ◽  
pp. 2576-2585 ◽  
Author(s):  
Irmina Pańczuk-Figura ◽  
Dorota Kołodyńska
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Chelating Agent ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

scholarly journals pH-Regulated Carbon Dots Fluorescence Sensor Array Detection of Multiple Heavy Metal Ions Under Stepwise Prediction

2022 ◽  
Author(s):  
Zijun Xu ◽  
Yuying Liu ◽  
Jiao Chen ◽  
Xiyuan Wang ◽  
Hao Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Sensor Array ◽  
Chelating Agent ◽  
Fluorescence Sensor ◽  
Array Detection ◽  
Multiple Heavy Metals

Abstract As a large amount of heavy metals leaches into water sources from industrial effluents, heavy metal pollution has become an important factor affecting water quality. To enable the detection of multiple heavy metals, we constructed a pH-regulation fluorescence sensor array. Firstly, by adding a metal chelating agent as receptor, metal ions and carbon quantum dots (CDs) were connected to distinguish between Cr6+, Fe3+, Fe2+, and Hg2+ ions. Thus, the lack of affinity between the indicator functional groups and the analyte was solved. Secondly, by adjusting the pH environment of the solution system, an economical and simple array sensing platform is established, which effectively simplified the array construction. In this study, the SX-model was used in the field of fluorescence sensor array detection for metal ion recognition. Based on the strategy of stepwise prediction, combined with the classification and concentration models, the bottleneck of the unified model in previous studies was broken. This sensor array demonstrated sensitive detection of four heavy metal ions within a concentration range from 1 to 50 µM, with an accuracy of 95.45%. Moreover, it displayed the ability to efficiently identify binary mixed samples with an accuracy of 95.45%. Furthermore, metal ions in 15 real samples (lake water) were effectively discriminated with 100% accuracy. A chelating agent was used to improve the sensitivity of heavy metal ion detection and eventually led to high-precision prediction using the SX-model.

RECOVERY AND EXTRACTION OF HEAVY METAL IONS USING IONIC LIQUID AS GREEN SOLVENT

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4051-4056 ◽  
Author(s):  
MASAMI KUMANO ◽  
TOMOKI YABUTANI ◽  
JUNKO MOTONAKA ◽  
YUJI MISHIMA
Keyword(s):  
Heavy Metal ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Volume Ratio ◽  
Chelating Agent ◽  
Good Solubility ◽  
Zinc Cadmium ◽  
Copper Zinc

Ionic liquids are expected to replace conventional organic solvents in organic synthesis, solvent extraction and electrochemistry due to their unique characters such as low volatility, high stability and so on. In this work, N , N ,-diethyl- N -methyl- N -(2-methoxyethyl) ammonium bis(trifluoromethansulfonyl)imide was used as an alternative solvent to extract heavy metal ions. As the extracting conditions, the additional effect of 8-hydroxyquinoline (8-HQ) as metal chelating agent into ionic liquids, shaking time and volume ratio were investigated. As extraction efficiency depended on 8-HQ concentration significantly, in order to extract high concentrated metal ions the solubility of 8-HQ into ionic liquid was tested. N , N ,-diethyl- N -methyl- N -(2-methoxyethyl) ammonium bis(trifluoromethansulfonyl)imide had good solubility of 8-HQ. Consequently, 5 μmol of copper, zinc, cadmium and manganese could be completely recovered with 100 μl of ionic liquid.

4-(2-Pyridylazo)-resorcinol-functionalized polyacrylonitrile fiber through a microwave irradiation method for the simultaneous optical detection and removal of heavy metals from water

2018 ◽  
Vol 4 (4) ◽  
pp. 487-492 ◽  
Author(s):  
Sheng Deng ◽  
GuangShan Zhang ◽  
Peng Wang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Microwave Irradiation ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection ◽  
Optical Detection ◽  
Polyacrylonitrile Fiber ◽  
Microwave Irradiation Method ◽  
Removal Of Heavy Metals

A PAR-functionalized fiber by microwave irradiation has both colorimetric detection and adsorption abilities for heavy metal ions.

Lariat-crown ether based fluorescence sensors for heavy metal ions

Tetrahedron ◽  
2008 ◽  
Vol 64 (22) ◽  
pp. 5268-5278 ◽  
Author(s):  
Hajime Maeda ◽  
David L. Tierney ◽  
Patrick S. Mariano ◽  
Mainak Banerjee ◽  
Dae Won Cho ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Crown Ether ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Fluorescence Sensors

Selective and reversible extraction of heavy metal-ions by mixed-donor crown ether-modified oxirane and thiirane resins

2002 ◽  
Vol 51 (1) ◽  
pp. 33-47 ◽  
Author(s):  
L.G.A van de Water ◽  
W.L Driessen ◽  
M.W Glenny ◽  
J Reedijk ◽  
M Schröder
Keyword(s):  
Heavy Metal ◽  
Crown Ether ◽  
Metal Ions ◽  
Heavy Metal Ions
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