Removal of copper and lead from aqueous solution by carboxylic acid functionalized deacetylated konjac glucomannan

2009 ◽  
Vol 171 (1-3) ◽  
pp. 802-808 ◽  
Author(s):  
Feng Liu ◽  
Xuegang Luo ◽  
Xiaoyan Lin ◽  
Lili Liang ◽  
Yan Chen
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Konjac Glucomannan

scholarly journals Electrochemiluminescence Study of Europium (III) Complex with Coumarin3-Carboxylic Acid

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Stefan Lis ◽  
Krzysztof Staninski ◽  
Tomasz Grzyb
Keyword(s):  
Aqueous Solution ◽  
Spectral Analysis ◽  
Energy Transfer ◽  
Solid State ◽  
Carboxylic Acid ◽  
Elemental Analysis ◽  
Aluminium Electrode ◽  
The Eu

The europium (III) complex of coumarin-3-carboxylic acid (C3CA) has been prepared and characterized on the basis of elemental analysis, IR, and emission (photoluminescence and electrochemiluminescence) spectroscopy. The synthesised complex having a formula Eu was photophysically characterized in solution and in the solid state. Electrochemiluminescence, ECL, of the system containing the Eu(III)/C3CA complex was studied using an oxide-covered aluminium electrode. The goal of these studies was to show the possibility of the use of electrochemical excitation of the Eu(III) ion in aqueous solution for emission generation. The generated ECL emission was very weak, and therefore its measurements and spectral analysis were carried out with the use of cut-off filters method. The studies proved a predominate role of the ligand-to-metal energy transfer (LMET) in the generated ECL.

scholarly journals Harnessing Chemical Energy for the Activation and Joining of Prebiotic Building Blocks

2019 ◽  
Author(s):  
Ziwei Liu ◽  
Long-Fei Wu ◽  
Jianfeng Xu ◽  
Claudia Bonfio ◽  
David Russell ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Peptide Nucleic Acid ◽  
Reactive Intermediates ◽  
Building Blocks ◽  
Acid System ◽  
Rna Oligomers ◽  
Prebiotic Activation ◽  
Simultaneous Activation ◽  
Acid Anhydrides

Simultaneous activation of carboxylates and phosphates provides multiple pathways for the generation of reactive intermediates, including mixed carboxylic acid-phosphoric acid anhydrides, for the synthesis of peptidyl-RNAs, peptides, RNA oligomers and primordial phospholipids. These results indicate that unified prebiotic activation chemistry could have enabled the joining of building blocks in aqueous solution from a common pool and enabled the progression of a system towards higher complexity foreshadowing the modern encapsulated peptide-nucleic acid system

Early instability of MIL-125-NH2 in aqueous solution and mediation of the visible photogeneration of NADH cofactor

2021 ◽  
Author(s):  
Matias Ezequiel Aguirre ◽  
Rocio Isla Naveira ◽  
Pablo Botta ◽  
Tamara Antonela Altieri ◽  
Alejandro Wolosiuk ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Metal Organic Frameworks ◽  
Semiconductor Materials ◽  
Metal Organic ◽  
Photoinduced Processes

Metal organic frameworks (MOFs) based on titanium and carboxylic acid derivatives have been recently proposed as mediators of multiple photoinduced processes in substitution of traditional semiconductor materials. In the case...

Two water-stable lanthanide metal–organic frameworks with oxygen-rich channels for fluorescence sensing of Fe(iii) ions in aqueous solution

2018 ◽  
Vol 47 (45) ◽  
pp. 16190-16196 ◽  
Author(s):  
Lizhen Liu ◽  
Yu Wang ◽  
Rongyan Lin ◽  
Zizhu Yao ◽  
Quanjie Lin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Metal Organic Frameworks ◽  
Fluorescence Sensing ◽  
Metal Organic ◽  
Lanthanide Metal

A strategy is proposed to construct oxygen-rich channel MOFs as chemosensors for sensing Fe3+ ions using oxygen-enriched multi-carboxylic acid ligands.

Adsorption behavior of carboxymethyl konjac glucomannan microspheres for fluoride from aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89417-89429 ◽  
Author(s):  
Liping Wu ◽  
Xiaoyan Lin ◽  
Jiajie Wu ◽  
Xingbao Zhou ◽  
Xuegang Luo
Keyword(s):  
Aqueous Solution ◽  
Electrostatic Interaction ◽  
Adsorption Mechanism ◽  
Konjac Glucomannan ◽  
Adsorption Behavior ◽  
Schematic Diagram ◽  
Carboxymethyl Konjac Glucomannan ◽  
Coordination Reaction

The CMKGM–La–Al is characterized by SEM, EDX, and XPS. We find that adsorption mechanism of the adsorbent involved coordination reaction and electrostatic interaction. The schematic diagram of preparation of CMKGM–La–Al is shown as above.

Fast Removal of Pb2+ from Aqueous Solution by Water Insoluble Konjac Glucomannan

2009 ◽  
Vol 610-613 ◽  
pp. 65-68 ◽  
Author(s):  
Xue Gang Luo ◽  
Feng Liu ◽  
Xiao Yan Lin
Keyword(s):  
Aqueous Solution ◽  
Correlation Coefficients ◽  
Konjac Glucomannan ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Equilibrium Process ◽  
Fast Removal

Konjac glucomannan (KGM) was converted into water insoluble konjac glucomannan (WIKGM) by treating with NaOH through completely deacetylated reaction. Adsorption study was carried out for the adsorption of Pb2+ from aqueous solution using water insoluble konjac glucomannan. The influences of pH, contact time, temperature and initial Pb2+ concentration on the absorbent were studied. Results of kinetic data showed that the Pb2+ adsorption rate was fast and good correlation coefficients were obtained for the pseudo second-order kinetic model. The equilibrium process was described well by the Langmuir isotherm model with maximum adsorption capacity of 9.18 mg/g on WIKGM at 25°C.

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