Synthesis and characterizations of two bis(benzimidazole)-based cobaltous coordination polymers with high adsorption capacity for congo red dye

2013 ◽  
Vol 37 ◽  
pp. 54-58 ◽  
Author(s):  
Shu-Lin Xiao ◽  
Yue-Hua Li ◽  
Pei-Juan Ma ◽  
Guang-Hua Cui
Keyword(s):  
Adsorption Capacity ◽  
Coordination Polymers ◽  
Congo Red ◽  
High Adsorption ◽  
Congo Red Dye ◽  
High Adsorption Capacity ◽  
Red Dye

Selective high adsorption capacity for Congo red dye of a new 3D supramolecular complex and its magnetic hybrid

2018 ◽  
Vol 5 (3) ◽  
pp. 694-704 ◽  
Author(s):  
Azizolla Beheshti ◽  
Faezeh Hashemi ◽  
Fatemeh Behvandi ◽  
Peter Mayer ◽  
Davide Atzei
Keyword(s):  
Congo Red ◽  
Selective Adsorption ◽  
Supramolecular Complex ◽  
High Adsorption ◽  
Donor Ligand ◽  
Congo Red Dye ◽  
Nitrogen Donor Ligand ◽  
Nitrogen Donor ◽  
High Adsorption Capacity ◽  
Red Dye

A new pentacoordinated Cd(ii)-CP based on a flexible nitrogen donor ligand (L) and a corresponding core–shell magnetic Fe3O4@SiO2-NH2@Cd(ii)-CP hybrid have been synthesized by ultrasonic irradiation. The products can be proposed as good recyclable adsorbents for the selective adsorption of Congo red dye.

Ultra-high adsorption capacity and selective removal of Congo red over aminated graphene oxide modified Mn-doped UiO-66 MOF

2021 ◽  
Vol 379 ◽  
pp. 407-416
Author(s):  
Abdelazeem S. Eltaweil ◽  
Hala M. Elshishini ◽  
Zekry F. Ghatass ◽  
Gehan M. Elsubruiti
Keyword(s):  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Congo Red ◽  
Selective Removal ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Mn Doped

Novel enantiomorphic Pb-coordination polymers dictated by the corresponding chiral ligands, [Pb((R,R)-TBA)(H2O)]·1.7H2O and [Pb((S,S)-TBA)(H2O)]·1.7H2O [TBA = 1,3,5-triazin-2(1H)-one-4,6-bis(alanyl)]

2021 ◽  
Author(s):  
Yunseung Kuk ◽  
Kang Min Ok
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Polymers ◽  
Chemical Stability ◽  
Congo Red ◽  
Chiral Ligands ◽  
High Chemical ◽  
Selective Uptake ◽  
Congo Red Dye ◽  
Red Dye ◽  
High Chemical Stability

Two enantiomorphic Pb-coordination polymers dictated by the corresponding chiral ligands reveal high chemical stability and a selective uptake of Congo red dye through the hydrogen bonds.

scholarly journals Adsorption of Congo red dye onto antimicrobial terephthaloyl thiourea cross-linked chitosan hydrogels

2017 ◽  
Vol 76 (10) ◽  
pp. 2719-2732 ◽  
Author(s):  
Nouf F. El-Harby ◽  
Shaimaa M. A. Ibrahim ◽  
Nadia A. Mohamed
Keyword(s):  
Adsorption Capacity ◽  
Congo Red ◽  
Dye Adsorption ◽  
Solution Temperature ◽  
Structural Variations ◽  
Maximum Sorption Capacity ◽  
Congo Red Dye ◽  
Chitosan Hydrogels ◽  
Red Dye ◽  
Kinetics And Isotherms

Abstract Adsorption capacity of three antimicrobial terephthaloyl thiourea cross-linked chitosan hydrogels for Congo red dye removal from its aqueous solution has been investigated for the first time in this work. These hydrogels were prepared by reacting chitosan with various amounts of terephthaloyl diisothiocyanate cross-linker. The effect of the hydrogel structural variations and several dye adsorption processing parameters to achieve the best adsorption capacity were investigated. The hydrogels' structural variations were obtained by varying their terephthaloyl thiourea moieties content. The processing variables included initial concentration of the dye solution, temperature and time of exposure to the dye. The adsorption kinetics and isotherms showed that the sorption processes were better fitted by the pseudo-second-order equation and the Langmuir equation, respectively. On the basis of the Langmuir analysis Congo red dye gave the maximum sorption capacity of 44.248 mg/g. The results obtained confirmed that the sorption phenomena are most likely to be controlled by chemisorption process. The adsorption reaction was endothermic and spontaneous according to the calculated results of adsorption thermodynamics.

scholarly journals Evaluation of Cocoa Beans Shell Powder as a Bioadsorbent of Congo Red Dye Aqueous Solutions

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2763
Author(s):  
Gabriela Rodríguez-Arellano ◽  
Juan Barajas-Fernández ◽  
Ricardo García-Alamilla ◽  
Laura Mercedes Lagunes-Gálvez ◽  
Antonio Hilario Lara-Rivera ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Congo Red ◽  
Industrial Wastes ◽  
Cocoa Bean ◽  
Synthetic Dyes ◽  
Cocoa Beans ◽  
Congo Red Dye ◽  
Order Polynomial ◽  
Red Dye ◽  
Shell Powder

The use of synthetic dyes in the textile, leather, and paper industries is a source of groundwater pollution around the world. There are different methods for the treatment of wastewater that has been contaminated with dyes, among which adsorption with agro-industrial wastes is gaining relevance. In the present study, the adsorption capacity of cocoa bean shell powder was evaluated when it was used as a bioadsorbent for Congo red dye in an aqueous medium. A 24 central factorial design with central and axial points was proposed to determine the adsorption capacity. The factors that were studied were the adsorbent (0.06–0.15 g), Congo red (40–120 mg L−1), pH (3–11), and time (4–36 h). The bioadsorbent was characterized through scanning electron microscopy and Fourier-transform infrared spectroscopy. The effects of the factors on the adsorption capacity for Congo red using cocoa bean shell were nonlinear, and they were modeled with a second-order polynomial (p < 0.05) and with an R2 of 0.84. The bioadsorbent obtained a maximum adsorption of 89.96% in runs. The process of optimization by using the surface response allowed the maximization of the adsorption, and the validation showed that 95.79% adsorption of the dye was obtained.

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