Synthesis and adsorption application of amine shield-introduced-released porous chitosan hydrogel beads for removal of acid orange 7 from aqueous solutions

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 62778-62787 ◽  
Author(s):  
Tingting Li ◽  
Yunguo Liu ◽  
Shufan Wang ◽  
Guangming Zeng ◽  
Bohong Zheng ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Low Cost ◽  
Acid Orange 7 ◽  
Chitosan Hydrogel ◽  
Acid Orange ◽  
Hydrogel Beads ◽  
Porous Chitosan

An effective and low-cost adsorbent named amine shield-introduced-released porous chitosan hydrogel beads (APCB) was synthesized and used for the removal of acid orange 7 from aqueous solutions.

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.

scholarly journals Magnetic Fe3O4@Chitosan Carbon Microbeads: Removal of Doxycycline from Aqueous Solutions through a Fixed Bed via Sequential Adsorption and Heterogeneous Fenton-Like Regeneration

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Bo Bai ◽  
Xiaohui Xu ◽  
Changchuan Li ◽  
Jianyu Xing ◽  
Honglun Wang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
High Efficiency ◽  
Low Cost ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Chitosan Hydrogel ◽  
Fixed Bed Column ◽  
Adsorptive Removal ◽  
Sequential Adsorption ◽  
Cracking Process

The adsorptive removal of antibiotics from aqueous solutions is recognized as the most suitable approach due to its easy operation, low cost, nontoxic properties, and high efficiency. However, the conventional regeneration of saturated adsorbents is an expensive and time-consuming process in practical wastewater treatment. Herein, a scalable adsorbent of magnetic Fe3O4@chitosan carbon microbeads (MCM) was successfully prepared by embedding Fe3O4 nanoparticles into chitosan hydrogel via an alkali gelation-thermal cracking process. The application of MCM composites for the adsorptive removal of doxycycline (DC) was evaluated using a fixed-bed column. The results showed that pH, initial concentration, flow rate, and bed depth are found to be important factors to control the adsorption capacity of DC. The Thomas and Yoon-Nelson models showed a good agreement with the experimental data and could be applied for the prediction of the fixed-bed column properties and breakthrough curves. More importantly, the saturated fixed bed can be easily recycled by H2O2 which shows excellent reusability for the removal of doxycycline. Thus, the combination of the adsorption advantage of chitosan carbon with catalytic properties of magnetic Fe3O4 nanoparticles might provide a new tool for addressing water treatment challenges.

Removal of Acid Orange 7 and Remazol Black 5 reactive dyes from aqueous solutions using a novel biosorbent

2012 ◽  
Vol 32 (6) ◽  
pp. 1394-1400 ◽  
Author(s):  
Yahya Hamzeh ◽  
Alireza Ashori ◽  
Elham Azadeh ◽  
Ali Abdulkhani
Keyword(s):  
Aqueous Solutions ◽  
Reactive Dyes ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Remazol Black

A novel photochemical system of ferrous sulfite complex: Kinetics and mechanisms of rapid decolorization of Acid Orange 7 in aqueous solutions

2014 ◽  
Vol 57 ◽  
pp. 87-95 ◽  
Author(s):  
Danna Zhou ◽  
Long Chen ◽  
Changbo Zhang ◽  
Yingtan Yu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Acid Orange 7 ◽  
Acid Orange

Modelling adsorption of acid orange 7 dye in aqueous solutions to spent brewery grains

2004 ◽  
Vol 40 (2) ◽  
pp. 163-170 ◽  
Author(s):  
Joaquim Pedro Silva ◽  
Sónia Sousa ◽  
Isolina Gonçalves ◽  
John J. Porter ◽  
Suzana Ferreira-Dias
Keyword(s):  
Aqueous Solutions ◽  
Acid Orange 7 ◽  
Acid Orange
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