scholarly journals Adsorptive Removal of Anionic Azo Dye New Coccine Using Silica and Silica-gel with Surface Modification by Polycation

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1536
Author(s):  
Tien Duc Pham ◽  
Viet Phuong Bui ◽  
Thuy Nga Pham ◽  
Thi Mai Dung Le ◽  
Kim Thuy Nguyen ◽  
...  
Keyword(s):  
Silica Gel ◽  
Adsorption Isotherms ◽  
Azo Dye ◽  
Dye Adsorption ◽  
Surface Group ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
As Adsorption ◽  
Langmuir And Freundlich Models ◽  
Positively Charged

In the present work, adsorption of anionic azo dye, new coccine (NCC) on silica and silica-gel in an aquatic environment was discovered. Effective conditions such as adsorption time, pH, the influence of dosage on NCC adsorption using strong polycation, poly-diallyl-dimethylammonium chloride (PDADMAC) modified silica (PMS) and PDADMAC modified silica-gel (PMSG) were systematically studied. The removal of NCC using PMS and PMSG were much higher than that using raw silica and silica-gel without PDADMAC in all pH ranges from 3 to 10. The adsorption of NCC onto PMS and PMSG was achieved maxima at the same conditions of contact time 30 min, pH 6. The optimum adsorbent dosages of PMS and PMSG for NCC removal were 10 and 20 mg·mL−1, respectively. Experimental results of NCC adsorption isotherms onto PMS and PMSG at different ionic strength were fitted by Langmuir and Freundlich models. The NCC removal efficiencies using PMS and PMSG were higher than 87%, indicating that PMS and PMSG are novel and reusable adsorbents for removal of anionic dye. Based on adsorption isotherms, and surface group changes after PDADMAC modification and NCC adsorption examined by Fourier transform infrared spectroscopy (FTIR), we demonstrate that electrostatic interaction between positively charged adsorbents’ surfaces and negative sulfonic groups of NCC are the main driving force for anionic azo dye adsorption onto PMS and PMGS adsorbents.

Nature-like solution for removal of direct brown 1 azo dye from aqueous phase using humics-modified silica gel

Chemosphere ◽  
2016 ◽  
Vol 145 ◽  
pp. 83-88 ◽  
Author(s):  
Alexander B. Volikov ◽  
Sergey A. Ponomarenko ◽  
Andrey I. Konstantinov ◽  
Kirk Hatfield ◽  
Irina V. Perminova
Keyword(s):  
Silica Gel ◽  
Aqueous Phase ◽  
Azo Dye ◽  
Modified Silica ◽  
Modified Silica Gel

Synthesis Process and Structure of Al/Mg Modified Silica-gel Particle.

2000 ◽  
Vol 116 (1) ◽  
pp. 56-61
Author(s):  
Tatsuo YAMAGUCHI ◽  
Toshiaki NAKAI ◽  
Kunihiko TAKEDA
Keyword(s):  
Silica Gel ◽  
Synthesis Process ◽  
Modified Silica ◽  
Modified Silica Gel

DFT studies on coordination models for adsorption essays of Cu(II) and Ni(II) solutions in modified silica gel with iminodiacetic groups

2016 ◽  
Vol 71 (6) ◽  
pp. 1019-1030 ◽  
Author(s):  
Alexander Carreño ◽  
Eduardo Schott ◽  
Ximena Zarate ◽  
Juan Manuel Manriquez ◽  
Juan C. Vega ◽  
...  
Keyword(s):  
Silica Gel ◽  
Dft Studies ◽  
Modified Silica ◽  
Modified Silica Gel

ICP-OES determination of trace metal ions after preconcentration by 4-(8-hydroxy-5-quinolylazo)naphthalenesulfonic acid modified silica gel

2008 ◽  
Vol 891 (1-3) ◽  
pp. 45-49 ◽  
Author(s):  
Xijun Chang ◽  
Haixia Luo ◽  
Yuemei Cui ◽  
Xiangbing Zhu ◽  
Yunhui Zhai ◽  
...  
Keyword(s):  
Trace Metal ◽  
Metal Ions ◽  
Silica Gel ◽  
Icp Oes ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Trace Metal Ions

Determination of Cu, Ni, and Zn in fuel ethanol by FAAS after enrichment in column packed with 2-aminothiazole-modified silica gel

2003 ◽  
Vol 375 (4) ◽  
pp. 574-577 ◽  
Author(s):  
P. S. Roldan ◽  
I. L. Alcântara ◽  
G. R. Castro ◽  
J. C. Rocha ◽  
C. C. F. Padilha ◽  
...  
Keyword(s):  
Silica Gel ◽  
Fuel Ethanol ◽  
Modified Silica ◽  
Modified Silica Gel

scholarly journals Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib

2017 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
Mochamad Lutfi Firdaus ◽  
Noli Krisnanto ◽  
Wiwit Alwi ◽  
Ronald Muhammad ◽  
Muhamad Allan Serunting
Keyword(s):  
Activated Carbon ◽  
Rice Straw ◽  
Adsorption Isotherms ◽  
Oil Palm ◽  
Dye Adsorption ◽  
Textile Dye ◽  
Synthetic Dyes ◽  
Potential Hazard ◽  
Synthetic Dye ◽  
Langmuir And Freundlich Models

Synthetic dye wastewater from textile industries is characterized by strong color, high temperature, variable pH and high chemical oxygen demand (COD). The strong color of wastewater affects aesthetic and water transparency of water bodies. The metabolites could be toxic to aquatic biota and posing a potential hazard to human health. Eventually, it will cause severe environmental problems. One of method that has advantages in term of simplicity to remove synthetic dyes is adsorption. Environmentally benign and low-cost materials to make adsorbent are biomass-based materials. Two different biomaterial wastes of rice straw and oil palm midrib were used in this study to develop activated carbon adsorbents. These adsorbents were applied for the removal of Naphtol AS-G dye in aqueous solution. The effects of solution pH, adsorbents masses and contact time on dye adsorption were evaluated based on batch experiments. Removal of dye can be achieved within 60 minutes at a wide pH range starting from 4 to 8. At lower pH, synthetic dye removal was decreasing probably due to protonation of adsorbent’s active sites. The adsorption isotherms based on Langmuir and Freundlich models were analyzed. The isotherms analysis indicated that the adsorption by rice straw and oil palm can be represented by Langmuir and Freundlich isotherm model, respectively. Adsorption isotherms of Naphtol AS-G onto activated carbon are favorable with high adsorption capacity for both biomaterials. The mechanisms of color removal by activated carbon involved chemical and physical adsorption, in accordance with both the Langmuir and Freundlich models. The calculated maximum dye adsorption capacities onto rice straw and oil palm midrib activated carbon were 55.86 and 69.44 mg/g, respectively. Adsorption using biomass-based activated carbon offers a good technique for textile wastewater treatment as it could remove up to 95% of the color intensity besides reducing other pollutants such as COD, nitrate and phosphate. 

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