scholarly journals Novel Fe3O4–poly(methacryloxyethyltrimethyl ammonium chloride) adsorbent for the ultrafast and efficient removal of anionic dyes

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 1172-1181
Author(s):  
Bo Zhou ◽  
Yuling Tang ◽  
Liming Zhao ◽  
Lijun Guo ◽  
Jianfei Zhou
Keyword(s):  
Ammonium Chloride ◽  
Magnetic Adsorbent ◽  
Acid Orange 7 ◽  
Efficient Removal ◽  
Anionic Dyes ◽  
Acid Orange ◽  
Direct Blue ◽  
Direct Blue 15

The Fe3O4–pDMC magnetic adsorbent was synthesized, and the mechanism of its rapid and efficient removal of two anionic dyes (acid orange 7 and direct blue 15) was studied.

scholarly journals Preparation and Characterization of Cationized Cellulose for the Removal of Anionic Dyes

2001 ◽  
Vol 19 (3) ◽  
pp. 197-210 ◽  
Author(s):  
A. Hashem ◽  
Reda M. El-Shishtawy
Keyword(s):  
Adsorption Capacity ◽  
Freundlich Isotherm ◽  
Structural Features ◽  
Isotherm Models ◽  
Acid Orange 7 ◽  
Anionic Dyes ◽  
Adsorption Parameters ◽  
Direct Blue ◽  
Equilibrium Data

The factors influencing the cationization of microcrystalline cellulose with 3-chloro-2-hydroxypropyl triethylammonium chloride in the presence of NaOH were investigated. The course of the reaction was followed by estimating the nitrogen content of the cationized product while its structural features were confirmed by IR analysis. The ability of cationized cellulose to adsorb anionic dyes, viz. Acid Orange 7, Direct Blue 75 and Direct Violet 31, was investigated at 25°C and 50°C. The equilibrium data obtained were fitted by the Langmuir and Freundlich isotherm models, allowing the corresponding adsorption parameters to be determined. The results showed that the adsorption capacity was dependent on the adsorbent, temperature, the nature of the dye and (to some extent) on van der Waals and hydrogen bonding. Cationized cellulose exhibited a much better adsorption capacity towards anionic dyes than cellulose.

Preparation of cationic waste paper and its application in poisonous dye removal

2013 ◽  
Vol 67 (11) ◽  
pp. 2560-2567 ◽  
Author(s):  
Fan Yang ◽  
Xiaojie Song ◽  
Lifeng Yan
Keyword(s):  
Low Cost ◽  
Aqueous Suspension ◽  
Order Kinetic ◽  
Acid Orange 7 ◽  
Anionic Dyes ◽  
Experimental Conditions ◽  
Adsorption Models ◽  
Acid Orange ◽  
Initial Ph ◽  
Pseudo Second Order

Cationic paper was prepared by reaction of paper with 2,3-epoxypropyltrimethylammonium chloride in aqueous suspension, and tested as low-cost adsorbent for wastewater treatment. The experimental results revealed that anionic dyes (Acid Orange 7, Acid Red 18, and Acid Blue 92) were adsorbed on the cationic paper nicely. The maximum amount of dye Acid Orange 7 adsorbed on cationic paper was 337.2 mg/g in experimental conditions. The effects of initial dye concentration, temperature, and initial pH of dye solution on adsorption capacity of cationic paper were studied. The pseudo-first-order and pseudo-second-order kinetic models were applied to describe the kinetic data. The Freundlich and Langmuir adsorption models were used to describe adsorption equilibrium. The thermodynamic data indicated that the adsorption process of dye on cationic paper occurred spontaneously.

The efficient removal of the hazardous azo dye Acid Orange 7 from water using modified biochar from pea peels

2020 ◽  
Vol 203 ◽  
pp. 327-355
Author(s):  
Mohamed A. El-Nemr ◽  
Nabil M. Abdelmonem ◽  
Ibrahim M. A. Ismail ◽  
Safaa Ragab ◽  
Ahmed El Nemr
Keyword(s):  
Azo Dye ◽  
Acid Orange 7 ◽  
Efficient Removal ◽  
Acid Orange ◽  
Modified Biochar

Triphenylphosphonium conjugated quaternary ammonium based gel: synthesis and potential application in the efficient removal of toxic acid orange 7 dye from aqueous solution

2020 ◽  
Vol 44 (35) ◽  
pp. 14989-14999
Author(s):  
Sayantani Bhattacharya ◽  
Diptendu Patra ◽  
Raja Shunmugam
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Quaternary Ammonium ◽  
Potential Application ◽  
Acid Orange 7 ◽  
Efficient Removal ◽  
Acid Orange

The concerted influence of quaternary ammonium and triphenylphosphonium moieties in a gel for removal of acid orange 7 from aqueous solutions.

Wet air and catalytic wet air oxidation of several azodyes from wastewaters: the beneficial role of catalysis

2009 ◽  
Vol 60 (8) ◽  
pp. 1989-1999 ◽  
Author(s):  
A. Rodríguez ◽  
J. García ◽  
G. Ovejero ◽  
M. Mestanza
Keyword(s):  
Azo Dyes ◽  
Oxygen Demand ◽  
Organic Carbon Content ◽  
Reactive Black 5 ◽  
Catalytic Wet Air Oxidation ◽  
Acid Orange 7 ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Acid Orange ◽  
Direct Blue

Degradation of several azo dyes, Acid Orange 7 (AO7), Acid Orange 74 (AO74), Direct Blue 71 (DB71), Reactive Black 5 (RB5) and Eriochrome Blue Black B (EBBB), well-known non-biodegradable mono, di and tri azo dyes has been studied using, wet-air oxidation (WAO) and catalytic wet air oxidation (CWAO). The efficiency of substrate decolorization and mineralization in each process has been comparatively discussed by evolution concentration, chemical oxygen demand, total organic carbon content and toxicity of dyes solutions. The most efficient method on decolorization and mineralization (TOC) was observed to be CWAO process. Mineralization efficiency with wet air and catalytic wet air oxidation essays was observed in the order of mono-azo > di-azo > tri-azo dye. Final solutions of CWAO applications after 180 min treatment can be disposed safely to environment.

scholarly journals Data on efficient removal of acid orange 7 by zeolitic imidazolate framework-8

Data in Brief ◽  
2019 ◽  
Vol 23 ◽  
pp. 103783 ◽  
Author(s):  
Aliyeh Ghasemi ◽  
Mahmoud Shams ◽  
Mehdi Qasemi ◽  
Mojtaba Afsharnia
Keyword(s):  
Acid Orange 7 ◽  
Efficient Removal ◽  
Zeolitic Imidazolate Framework ◽  
Acid Orange
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