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

Nano-zerovalent manganese/biochar composite for the adsorptive and oxidative removal of Congo-red dye from aqueous solutions

2021 ◽  
Vol 403 ◽  
pp. 123854 ◽  
Author(s):  
Jibran Iqbal ◽  
Noor S. Shah ◽  
Murtaza Sayed ◽  
Nabeel Khan Niazi ◽  
Muhammad Imran ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Congo Red ◽  
Congo Red Dye ◽  
Oxidative Removal ◽  
Red Dye

scholarly journals Adsorption of Congo Red Dye from Aqueous Solutions Using Roots of Eichhornia Crassipes: Kinetic and Equilibrium Studies

2014 ◽  
Vol 50 ◽  
pp. 862-869 ◽  
Author(s):  
Wycliffe Chisutia Wanyonyi ◽  
John Mmari Onyari ◽  
Paul Mwanza Shiundu
Keyword(s):  
Aqueous Solutions ◽  
Congo Red ◽  
Eichhornia Crassipes ◽  
Equilibrium Studies ◽  
Congo Red Dye ◽  
Red Dye

Removal of Congo red dye from aqueous solutions using a halloysite-magnetite-based composite

2016 ◽  
Vol 73 (9) ◽  
pp. 2132-2142 ◽  
Author(s):  
F. Ferrarini ◽  
L. R. Bonetto ◽  
Janaina S. Crespo ◽  
M. Giovanela
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Congo Red ◽  
Contact Time ◽  
High Efficiency ◽  
Dye Adsorption ◽  
Order Model ◽  
Congo Red Dye ◽  
Pseudo Second Order ◽  
Red Dye

Adsorption has been considered as one of the most effective methods to remove dyes from aqueous solutions due to its ease of operation, high efficiency and wide adaptability. In view of all these aspects, this study aimed to evaluate the adsorption capacity of a halloysite-magnetite-based composite in the removal of Congo red dye from aqueous solutions. The effects of stirring rate, pH, initial dye concentration and contact time were investigated. The results revealed that the adsorption kinetics followed the pseudo-second-order model, and equilibrium was well represented by the Brunauer–Emmett–Teller isotherm. The thermodynamic data showed that dye adsorption onto the composite was spontaneous and endothermic and occurred by physisorption. Finally, the composite could also be regenerated at least four times by calcination and was shown to be a promising adsorbent for the removal of this dye.

scholarly journals Application of Activated Carbon Adsorbents Prepared from Prickly Pear Fruit Seeds and a Conductive Polymer Matrix to Remove Congo Red from Aqueous Solutions

Fibers ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 7
Author(s):  
Saadia Lahreche ◽  
Imane Moulefera ◽  
Abdelkader El El Kebir ◽  
Lilia Sabantina ◽  
M’hamed Kaid ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Polymer Matrix ◽  
Adsorption Kinetics ◽  
Congo Red ◽  
Conductive Polymer ◽  
Prickly Pear ◽  
X Ray ◽  
Congo Red Dye ◽  
Enthalpy Changes ◽  
Red Dye

The present work was aimed to evaluate the adsorption properties of activated carbons based on prickly pear seeds (PPS) and conductive polymer matrix based on polyaniline (PANI) for the removal of anionic Congo red (CR) dye from aqueous solutions. The adsorbent was prepared by polymerization of aniline in the presence of activated PPS by phosphoric acid and sodium hydroxide. The samples were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and the Brunauer–Emmett–Teller (BET) methods. The adsorption kinetics were studied using UV-visible (UV/Vis) spectroscopy. The characterization data suggest that the adsorption of the Congo red dye is enhanced because PANI chain molecules, which are especially accountable for removal through π—π interaction and H-bonding with the CR, are adsorbed/tethered onto the acid-activated PPS (PPSH), and thus surmount the mass transfer limitation by being best exposed to the CR-adsorbed molecule. The adsorption kinetics follows the pseudo-second order process. The correlation coefficients (R2) for Langmuir, Freundlich and Tempkin showed that the adsorption values obey Freundlich and Tempkin isotherm models. Moreover, the isotherm was most accurately described by the Freundlich model, and the maximum removal percentage was calculated to be 91.14% under optimized conditions of pH 6.6, 1 g/L of adsorbent dosage, and an initial CR dye concentration of 20 mg·L−1. Importantly, the hybrid adsorbent exhibited the highest adsorption capacity (80.15%) after five cycles of the adsorption–desorption process. Thermodynamic parameters, such as entropy changes, enthalpy changes and Gibbs free energy, were also evaluated. These results indicated that the PANI matrix can generally be better utilized for the removal of Congo red dye when appropriately dispersed on the surface of suitable support materials. These results provide a new direction to promote the separable adsorbents with increasing performance for adsorption of dye impurities from wastewater.

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