Selective anionic dye adsorption, topology and luminescence study of structurally diverse cadmium(ii) coordination polymers

2019 ◽  
Vol 6 (1) ◽  
pp. 278-286 ◽  
Author(s):  
Ruchi Gaur
Keyword(s):  
Methyl Orange ◽  
Coordination Polymers ◽  
Congo Red ◽  
Dye Adsorption ◽  
Anionic Dyes ◽  
Anionic Dye ◽  
Luminescence Study

Out of four, three coordination polymers have been successfully explored as topology, luminescence and highly selective anionic dyes (methyl orange and congo red) adsorption aspects.

scholarly journals Fabrication and Application of Zeolite/Acanthophora Spicifera Nanoporous Composite for Adsorption of Congo Red Dye from Wastewater

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2441
Author(s):  
Ahmed Hamd ◽  
Asmaa Ragab Dryaz ◽  
Mohamed Shaban ◽  
Hamad AlMohamadi ◽  
Khulood A. Abu Al-Ola ◽  
...  
Keyword(s):  
Congo Red ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Industrial Effluent ◽  
Dye Adsorption ◽  
Field Testing ◽  
Field Trials ◽  
Anionic Dyes ◽  
Intra Particle Diffusion ◽  
Red Dye

Systematic investigations involving laboratory, analytical, and field trials were carried out to obtain the most efficient adsorbent for the removal of congo red (CR) dye from industrial effluent. Modification of the zeolite (Z) by the Acanthophora Spicifera algae (AS; marine algae) was evaluated in terms of adsorption capability of the zeolite to remove CR dye from aqueous solution. The zeolite/algae composite (ZAS) was fabricated using the wet impregnation technique. The AS, Z, and the synthesized ZAS composite were analyzed utilizing various characterization techniques. The newly synthesized ZAS composite has an adsorption capacity that is significantly higher than that of Z and AS, particularly at low CR concentrations. Batch experiments were carried out to explore the effects of different experimental factors, as well as the dye adsorption isotherms and kinetics. Owing to the presence of intermolecular interactions, the computational analysis showed that the adsorption of the CR molecule on zeolite surfaces is exothermic, energetically favorable, and spontaneous. Furthermore, growing the zeolite surface area has no discernible effect on the adsorption energies in all configurations. The ZAS composite may be used as a low-cost substitute adsorbent for the removal of anionic dyes from industrial wastewater at lower dye concentrations, according to the experimental results. Adsorption of CR dye onto Z, AS, and ZAS adsorbents was adequately explained by pseudo-second-order kinetics and the Langmuir isotherm. The sorption mechanism was also evaluated using Weber’s intra-particle diffusion module. Finally, field testing revealed that the newly synthesized adsorbent was 98.0% efficient at extracting dyes from industrial wastewater, proving the foundation of modern eco-friendly materials that aid in the reuse of industrial wastewater.

Linear polymeric ionic liquids as phase-transporters for both cationic and anionic dyes with synergic effects

2015 ◽  
Vol 6 (39) ◽  
pp. 7060-7068 ◽  
Author(s):  
Hualei Zhao ◽  
Yanting Yu ◽  
Zonghao Li ◽  
Bin Luo ◽  
Xinhang Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Ionic Liquids ◽  
Methyl Orange ◽  
Cationic Dye ◽  
Anionic Dyes ◽  
Polymeric Ionic Liquids ◽  
Anionic Dye

Linear polymeric ionic liquids were synthesized and demonstrated to be very effective transporters for both anionic dye methyl orange (MO) and cationic dye methylene blue (MB) from water to chloroform individually as well as simultaneously.

Degradation of cationic and anionic dyes in coagulation–flocculation process using bi-functionalized silica hybrid with aluminum-ferric as auxiliary agent

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 34206-34215 ◽  
Author(s):  
Yen-Yie Lau ◽  
Yee-Shian Wong ◽  
Tjoon-Tow Teng ◽  
Norhashimah Morad ◽  
Mohd Rafatullah ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Cationic Dye ◽  
Functionalized Silica ◽  
Anionic Dyes ◽  
Methyl Orange Degradation ◽  
Anionic Dye ◽  
Coagulation Process ◽  
Flocculation Process ◽  
Silica Hybrid

Cationic dye (methylene blue) and anionic dye (methyl orange) degradation in the coagulation process was demonstrated.

Highly efficient methyl orange adsorption by UV-012, a new crystalline Co(ii) MOF

CrystEngComm ◽  
2021 ◽  
Author(s):  
Daniel J. Ramírez ◽  
Luis A. Alfonso Herrera ◽  
Raúl Colorado-Peralta ◽  
Rodolfo Peña Rodríguez ◽  
P. K. Camarillo Reyes ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Methyl Orange ◽  
Metal Organic Framework ◽  
Dye Adsorption ◽  
Anionic Dye ◽  
Highly Efficient ◽  
New Material ◽  
Metal Organic ◽  
Organic Framework

This work presents three scientific contributions: the new metal organic framework (UV-012) crystal structure, the evaluation of this new material for dye adsorption and a new mechanism that explains the excellent and selective anionic dye adsorption by this material.

scholarly journals Facile synthesis of mesoporous calcium carbonate particles with finger citron residue as template and their adsorption performances for Congo red

2017 ◽  
Vol 36 (3-4) ◽  
pp. 872-887 ◽  
Author(s):  
Luying Ma ◽  
Guihua Zhao ◽  
Yaoyao Fang ◽  
Wei Dai ◽  
Na Ma
Keyword(s):  
Photoelectron Spectroscopy ◽  
Congo Red ◽  
Large Scale ◽  
Dye Adsorption ◽  
Cost Effective ◽  
Order Kinetic ◽  
Anionic Dyes ◽  
Cost Effective Method ◽  
Order Kinetic Model ◽  
Red Dye

Herein, we demonstrate a simple and cost-effective method to prepare the new hierarchically Ni-doped porous CaCO3 monoliths in a large scale by mineralizing finger citron residue templates with a calcium acetate precursor. The morphology, microstructure, and element composition of as-prepared adsorbents are characterized by Scanning Electron Microscope (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM), and N2 adsorption, respectively. Adsorption performance of anionic dye Congo red was investigated in a batch experiment. The results showed that pseudo-second-order kinetic model and Langmuir adsorption isotherm matched well for the Congo red adsorption. Compared with previously reported adsorbents, due to positive and negative charge effect between Congo red and Ni, Ni-doped porous CaCO3 monoliths demonstrated a superior Congo red dye adsorption capability. The results of the present study substantiate that Ni-doped porous CaCO3 monoliths is a promising adsorbent for the removal of the anionic dyes from wastewater.

scholarly journals Modification of cotton fabrics with 2-diethylaminoethyl chloride for salt-free dyeing with anionic dyes

Cellulose ◽  
2021 ◽  
Author(s):  
Peixin Tang ◽  
Leilah-Marie E. Lockett ◽  
Mengxiao Zhang ◽  
Gang Sun
Keyword(s):  
Electrostatic Interactions ◽  
Light Exposure ◽  
Dye Adsorption ◽  
Cost Effective ◽  
Cotton Fabrics ◽  
Cotton Cellulose ◽  
Hydroxyl Groups ◽  
Anionic Dyes ◽  
Free System ◽  
Untreated Cotton

AbstractA chemical modification of cotton fabrics by 2-diethylaminoethyl chloride (DEAE-Cl) was achieved, and the resulted cotton fabrics demonstrated salt-free dyeing properties with anionic dyes. Nucleophilic property of hydroxyl groups in cotton cellulose was enhanced under alkaline conditions and could react with DEAE-Cl, a chemical possessing both nucleophilic and electrophilic sites. The monolayered DEAE-grafted cotton cellulose could further react with DEAE-Cl to form multiple cationic quaternary ammonium salts (denoted as DEAE@Cotton), which are highly interactive with anionic dye molecules. The strong electrostatic interactions between the DEAE@Cotton and the dyes eliminated the use of inorganic salts in cotton dyeing process. The chemical structure and property of DEAE@Cotton were characterized and compared with untreated cotton. The DEAE@Cotton can be dyed in a salt-free system, and the dye exhaustion was faster than the conventional dyeing method due to the robust electrostatic interactions of the fabrics with anionic dyes. The dyed fabrics demonstrated outstanding color fastness under repeated washing, light exposure, and crocking. The dye adsorption process on DEAE@Cotton follows Langmuir isotherm model (R2 = 0.9667). The mechanism of enhanced dyeability was experimentally proved by treating the fabric with other anionic dyes in a salt-free system, proving the process to be environmentally friendly and cost-effective. Graphic abstract

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