Continuous fixed-bed column study for removal of Congo red dye from aqueous solutions using Nelumbo nucifera leaf adsorbent

2021 ◽  
pp. 1-20
Author(s):  
P Vairavel ◽  
Nakul Rampal
Keyword(s):  
Aqueous Solutions ◽  
Congo Red ◽  
Fixed Bed ◽  
Nelumbo Nucifera ◽  
Fixed Bed Column ◽  
Column Study ◽  
Congo Red Dye ◽  
Red Dye

scholarly journals REMOVAL OF CONGO RED DYE USING ELECTROCOAGULATED METAL HYDROXIDE IN A FIXED-BED COLUMN: CHARACTERIZATION, OPTIMIZATION AND MODELING STUDIES

2019 ◽  
Vol 18 (3) ◽  
pp. 1133-1142 ◽  
Author(s):  
S.I. Suárez-Vázquez ◽  
◽  
J.A. Vidales-Contreras ◽  
J.M. Márquez-Reyes ◽  
A. Cruz-López ◽  
...  
Keyword(s):  
Congo Red ◽  
Fixed Bed ◽  
Metal Hydroxide ◽  
Fixed Bed Column ◽  
Congo Red Dye ◽  
Modeling Studies ◽  
Red Dye

scholarly journals Continuous Fixed-Bed Column Studies on Congo Red Dye Adsorption-Desorption Using Free and Immobilized Nelumbo nucifera Leaf Adsorbent

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 54
Author(s):  
Vairavel Parimelazhagan ◽  
Gautham Jeppu ◽  
Nakul Rampal
Keyword(s):  
Congo Red ◽  
Agricultural Waste ◽  
Fixed Bed ◽  
Dye Adsorption ◽  
Nelumbo Nucifera ◽  
Substantial Contribution ◽  
Flow Mode ◽  
Waste Biomass ◽  
Column Studies ◽  
Fixed Bed Column

The adsorption of Congo red (CR), an azo dye, from aqueous solution using free and immobilized agricultural waste biomass of Nelumbo nucifera (lotus) has been studied separately in a continuous fixed-bed column operation. The N. nucifera leaf powder adsorbent was immobilized in various polymeric matrices and the maximum decolorization efficiency (83.64%) of CR occurred using the polymeric matrix sodium silicate. The maximum efficacy (72.87%) of CR dye desorption was obtained using the solvent methanol. Reusability studies of free and immobilized adsorbents for the decolorization of CR dye were carried out separately in three runs in continuous mode. The % color removal and equilibrium dye uptake of the regenerated free and immobilized adsorbents decreased significantly after the first cycle. The decolorization efficiencies of CR dye adsorption were 53.66% and 43.33%; equilibrium dye uptakes were 1.179 mg g–1 and 0.783 mg g–1 in the third run of operation with free and immobilized adsorbent, respectively. The column experimental data fit very well to the Thomas and Yoon–Nelson models for the free and immobilized adsorbent with coefficients of correlation R2 ≥ 0.976 in various runs. The study concludes that free and immobilized N. nucifera can be efficiently used for the removal of CR from synthetic and industrial wastewater in a continuous flow mode. It makes a substantial contribution to the development of new biomass materials for monitoring and remediation of toxic dye-contaminated water resources.

Adsorptive Remediation of Congo Red Dye in Aqueous Solutions Using Acid Pretreated Sugarcane Bagasse

2020 ◽  
Vol 28 (4) ◽  
pp. 1129-1137 ◽  
Author(s):  
Abd El-Aziz A. Said ◽  
Aref A. M. Aly ◽  
Mohamed N. Goda ◽  
Mohamed Abd El-Aal ◽  
Mohamed Abdelazim
Keyword(s):  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Congo Red ◽  
Congo Red Dye ◽  
Pretreated Sugarcane Bagasse ◽  
Red Dye

Adsorption behavior of Congo red dye from aqueous solutions onto exfoliated graphite as an adsorbent: Kinetic and isotherm studies

2019 ◽  
Vol 18 ◽  
pp. 4449-4457 ◽  
Author(s):  
Thinh Van Pham ◽  
Thuan Van Tran ◽  
Trinh Duy Nguyen ◽  
Nguyen Thi Hong Tham ◽  
Phan Thanh Tri Quang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Congo Red ◽  
Adsorption Behavior ◽  
Exfoliated Graphite ◽  
Congo Red Dye ◽  
Red Dye

Adsorption of Congo red dye from aqueous solutions using tunics of the corm of the saffron

2020 ◽  
Vol 22 ◽  
pp. 134-139 ◽  
Author(s):  
Abdellah Dbik ◽  
Safae Bentahar ◽  
Mohammed El Khomri ◽  
Noureddine El Messaoudi ◽  
Abdellah Lacherai
Keyword(s):  
Aqueous Solutions ◽  
Congo Red ◽  
Congo Red Dye ◽  
Red Dye
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