Encapsulation of tungstophosphoric acid into harmless MIL-101(Fe) for effectively removing cationic dye from aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 81622-81630 ◽  
Author(s):  
Ting-Ting Zhu ◽  
Zhi-Ming Zhang ◽  
Wei-Lin Chen ◽  
Zhu-Jun Liu ◽  
En-Bo Wang
Keyword(s):  
Aqueous Solution ◽  
Composite Material ◽  
Organic Dyes ◽  
Tungstophosphoric Acid ◽  
Cationic Dyes ◽  
Cationic Dye ◽  
Adsorption Performance

H3PW12O40 was incorporated into cages of harmless MIL-101(Fe). The composite material exhibited excellent adsorption performance for the cationic dyes MB and RhB, can be utilized in the selective capture and separation of organic dyes in water and is reusable and stable.

Preparation and Application of CA/BaSO4 -CR Composite Gel Ball in Cationic Dye Wastewater Treatment

2014 ◽  
Vol 955-959 ◽  
pp. 38-46
Author(s):  
Da Mei Yu ◽  
Yun Lin ◽  
Yi Min Zhang ◽  
Wen Juan Zhou ◽  
Dan Hua Zhao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Calcium Alginate ◽  
Cationic Dyes ◽  
Potential Candidate ◽  
Cationic Dye ◽  
Dye Wastewater ◽  
Adsorption Selectivity ◽  
Adsorption Performance ◽  
Treatment Processes ◽  
Composite Gel

A new hybrid adsorbent of calcium-alginate encapsulated BaSO4-CR (CABSC) has been prepared. The adsorption selectivity and mechanism were studied by investigating the adsorption performance of two anionic and two cationic dyes. The adsorption of two cationic dyes (EV and MB) from aqueous solutions was examined using a batch sorption technique. The effects of time, pH, temperature and ionic strength on the adsorption were examined. Besides, this material was applied in the treatment of two practical cationic dye wastewaters. Our study shows that the sorbent could be a potential candidate for utilization in dye wastewater treatment processes.

Removal of Methylene Blue from Aqueous Solution by a Novel PAA@Fe-Si Composite Material

2014 ◽  
Vol 665 ◽  
pp. 479-482
Author(s):  
Chao Shuai ◽  
Yun Wen Liao ◽  
He Jun Gao ◽  
Luan Luan Zhang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Composite Material ◽  
Contact Time ◽  
Maximum Adsorption Capacity ◽  
Cationic Dye ◽  
Solution Ph ◽  
Mb Adsorption ◽  
Scanning Electron ◽  
Better Than

A novel organic-inorganic PAA@Fe-Si composite material was synthesized by acrylic acid and mesoporous iron-incorporated material and used as an efficient and specific adsorbent for the removal of methylene blue (MB), a cationic dye from aqueous solution. The properties of the composite material were characterized by scanning electron microscopy, Fourier transform infrared and thermogravimetric. The effects of initial solution pH, adsorbent dosage, and contact time on MB adsorption and temperature have been investigated. The results showed that the maximum adsorption capacity of PAA@Fe-Si reached 587mg/g at 298 K, which was much better than pure Fe-Si adsorbent.

scholarly journals Microwave-assisted rapid synthesis of graphene-analogue hexagonal boron nitride (h-BN) nanosheets and their application for the ultrafast and selective adsorption of cationic dyes from aqueous solutions

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 53984-53995 ◽  
Author(s):  
Aliyar Mahdizadeh ◽  
Saeed Farhadi ◽  
Abedin Zabardasti
Keyword(s):  
Aqueous Solution ◽  
Boron Nitride ◽  
Aqueous Solutions ◽  
Organic Dyes ◽  
Hexagonal Boron Nitride ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Rapid Synthesis ◽  
Microwave Assisted ◽  
Microwave Assisted Method

Graphene-analogue hexagonal boron nitride (h-BN) nanosheets are successfully synthesizedviaa facile and fast microwave-assisted method in 10 min and used as a novel adsorbent for the ultrafast removal of cationic organic dyes in aqueous solution.

scholarly journals Treatment of Wastewater Containing Organic Dyes: Recovery of Dye Adsorbed on Starch-Based Materials Through Conversion of Adsorbent into Alcohol

2015 ◽  
Vol 63 (2) ◽  
pp. 119-124 ◽  
Author(s):  
Sati Saha ◽  
M Yousuf Ali Mollah ◽  
Md Abu Bin Hasan Susan ◽  
Md Mominul Islam
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Weight Loss ◽  
Wheat Flour ◽  
Fermentation Process ◽  
Organic Dyes ◽  
Cationic Dye ◽  
Visible Spectroscopy ◽  
Optimum Amount ◽  
Uv Visible

The recovery of a cationic dye, methylene blue (MB), from the residue generated during its removal via adsorption on starch-based adsorbents from aqueous solution was studied. Adsorption characteristics of MB on wheat flour (WF) and pure starch were analyzed using UV-visible spectroscopy. WF and starch were loaded with an optimum amount of MB producing MB-WF and MB-starch, respectively, leaving residues. The desorption characteristics and % recovery of MB from both the synthetic wastes were determined. The effects of yeast and temperature on the recovery of MB were also investigated. The mechanism of desorption of MB from the surface of starch was established by analyzing the weight loss profiles for different mixtures containing water, MB, WF or starch and yeast. Finally, the MB-WF and MB-starch species were fermented using diastase enzyme and yeast and the products formed were characterized by chemical, UV-visible spectroscopic and gas chromatographic analyses. The fermentation process was found to successfully convert starch to ethanol without decolorizing the MB species present in the residue.Dhaka Univ. J. Sci. 63(2):119-124, 2015 (July)

Adsorptive removal of organic dyes from aqueous solution by a Zr-based metal–organic framework: effects of Ce(iii) doping

2018 ◽  
Vol 47 (11) ◽  
pp. 3913-3920 ◽  
Author(s):  
Ji-Min Yang ◽  
Rong-Jian Ying ◽  
Chun-Xiang Han ◽  
Qi-Tu Hu ◽  
Hui-Min Xu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
High Stability ◽  
Organic Dyes ◽  
Metal Organic Framework ◽  
Dye Adsorption ◽  
Adsorptive Removal ◽  
Adsorption Performance ◽  
Metal Organic ◽  
Organic Framework

Ce(iii)-doped UiO-66 nanocrystals exhibited better dye adsorption performance than pristine UiO-66, showing the advantages of high stability and excellent porosity.

Removal of Toxic Dyestuffs from Aqueous Solution by Amphoteric Bioadsorbent

2020 ◽  
Vol 16 ◽  
Author(s):  
Reda M. El-Shishtawy ◽  
Abdullah M. Asiri ◽  
Nahed S. E. Ahmed
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Dye Removal ◽  
Exchange Process ◽  
Cationic Dyes ◽  
Carboxyl Groups ◽  
Maximum Adsorption Capacity ◽  
Equilibrium Isotherm ◽  
Ion Exchange Process ◽  
Dyes And Pigments

Background: Color effluents generated from the production industry of dyes and pigments and their use in different applications such as textile, paper, leather tanning, and food industries, are high in color and contaminants that damage the aquatic life. It is estimated that about 105 of various commercial dyes and pigments amounted to 7×105 tons are produced annually worldwide. Ultimately, about 10–15% is wasted into the effluents of the textile industry. Chitin is abundant in nature, and it is a linear biopolymer containing acetamido and hydroxyl groups amenable to render it atmospheric by introducing amino and carboxyl groups, hence able to remove different classes of toxic organic dyes from colored effluents. Methods: Chitin was chemically modified to render it amphoteric via the introduction of carboxyl and amino groups. The amphoteric chitin has been fully characterized by FTIR, TGA-DTG, elemental analysis, SEM, and point of zero charge. Adsorption optimization for both anionic and cationic dyes was made by batch adsorption method, and the conditions obtained were used for studying the kinetics and thermodynamics of adsorption. Results: The results of dye removal proved that the adsorbent was proven effective in removing both anionic and cationic dyes (Acid Red 1 and methylene blue (MB)), at their respective optimum pHs (2 for acid and 8 for cationic dye). The equilibrium isotherm at room temperature fitted the Freundlich model for MB, and the maximum adsorption capacity was 98.2 mg/g using 50 mg/l of MB, whereas the equilibrium isotherm fitted the Freundlich and Langmuir model for AR1 and the maximum adsorption capacity was 128.2 mg/g. Kinetic results indicate that the adsorption is a two-step diffusion process for both dyes as indicated by the values of the initial adsorption factor (Ri) and follows the pseudo-second-order kinetics. Also, thermodynamic calculations suggest that the adsorption of AR1 on the amphoteric chitin is an endothermic process from 294 to 303 K. The result indicated that the mechanism of adsorption is chemisorption via an ion-exchange process. Also, recycling of the adsorbent was easy, and its reuse for dye removal was effective. Conclusion: New amphoteric chitin has been successfully synthesized and characterized. This resin material, which contains amino and carboxyl groups, is novel as such chemical modification of chitin hasn’t been reported. The amphoteric chitin has proven effective in decolorizing aqueous solution from anionic and cationic dyes. The adsorption behavior of amphoteric chitin is believed to follow chemical adsorption with an ion-exchange process. The recycling process for few cycles indicated that the loaded adsorbent could be regenerated by simple treatment and retested for removing anionic and cationic dyes without any loss in the adsorbability. Therefore, the study introduces a new and easy approach for the development of amphoteric adsorbent for application in the removal of different dyes from aqueous solutions.

Application of seaweeds for the removal of cationic dye from aqueous solution

2016 ◽  
Vol 57 (53) ◽  
pp. 25812-25821 ◽  
Author(s):  
J. Jegan ◽  
J. Vijayaraghavan ◽  
T. Bhagavathi Pushpa ◽  
S.J. Sardhar Basha
Keyword(s):  
Aqueous Solution ◽  
Cationic Dye

scholarly journals Chitosan/Zeolite Composite Aerogels for a Fast and Effective Removal of Both Anionic and Cationic Dyes from Water

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1691
Author(s):  
Angela Marotta ◽  
Enrica Luzzi ◽  
Martina Salzano de Luna ◽  
Paolo Aprea ◽  
Veronica Ambrogi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Broad Spectrum ◽  
Organic Dyes ◽  
Indigo Carmine ◽  
Zeolite 13X ◽  
Industrial Sectors ◽  
Effective Removal ◽  
Composite Aerogels ◽  
Zeolite Composite ◽  
Adsorption Desorption

Organic dyes are extensively used in many industrial sectors, and their uncontrolled disposal into wastewaters raises serious concerns for environmental and human health. Due to the large variety of such pollutants, an effective remediation strategy should be characterized by a broad-spectrum efficacy. A promising strategy is represented by the combination of different adsorbent materials with complementary functionalities to develop composite materials that are expected to remove different contaminants. In the present work, a broad-spectrum adsorbent was developed by embedding zeolite 13X powder (ZX) in a chitosan (CS) aerogel (1:1 by weight). The CS–ZX composite adsorbent removes both anionic (indigo carmine, IC) and cationic (methylene blue, MB) dyes effectively, with a maximum uptake capacity of 221 mg/g and 108 mg/g, respectively. In addition, the adsorption kinetics are rather fast, with equilibrium conditions attained in less than 2 h. The composite exhibits good mechanical properties in both dry and wet state, which enables its handling for reusability purposes. In this regard, preliminary tests show that the full restoration of the IC removal ability over three adsorption–desorption cycles is achieved using a 0.1 M NaOH aqueous solution, while a 1 M NaCl aqueous solution allows one to preserve >60% of the MB removal ability.

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