Preparation of Highly Effective Hybrid Adsorbent by Anionic Dye Wastewater and Its Use in Cationic Dye Wastewater

2014 ◽  
Vol 140 (2) ◽  
pp. 04013001 ◽  
Author(s):  
Danhua Zhao ◽  
Xiaojun Liu ◽  
Zhaoxia Deng ◽  
Manli Cao ◽  
Xiulian Zhang ◽  
...  
Keyword(s):  
Cationic Dye ◽  
Dye Wastewater ◽  
Anionic Dye ◽  
Highly Effective

Treatment of Cationic Dye Wastewater with Hybrid Sorbent Generated by Anionic Dye Wastewater Hybridization with Calcium Fluoride

2013 ◽  
Vol 652-654 ◽  
pp. 1571-1579
Author(s):  
Dan Hua Zhao ◽  
Xiu Lian Zhang ◽  
Wei Yin ◽  
Xiao Jun Liu
Keyword(s):  
Ionic Strength ◽  
Calcium Fluoride ◽  
Low Cost ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Maximum Adsorption Capacity ◽  
Cationic Dye ◽  
Dye Wastewater ◽  
Anionic Dye ◽  
Hybrid Sorbent

CaF2/AG25 (CFA) hybrid sorbent formed by hybrid reaction with activated calcium fluoride of low cost and anionic dye wastewater-Acid Green 25 (AG25) was used for the treatment of cationic dye wastewater. The adsorption of two cationic dyes methyl violet (MV) and Neutral Red (NR) from aqueous solutions was examined using a batch sorption technique. The effects of time, pH, ionic strength and temperature on the adsorption were also examined. It exhibited a faster adsorption to cationic dyes and hardly affected in pH over 3.5, ionic strength low 0.04 mol/L and temperature between 20 oC and 60 oC. The adsorption behavior of the NR and MV on CFA is in good agreement with the Langmiur isotherms model with the correlation coefficients of R 0.9948 for NR and 0.9992 for MV and the maximum adsorption capacity of NR (39.22 mg/g) and MV (48.78 mg/g). Finally, this sorbent was used in treatment of two practical cationic dye wastewaters with satisfactory results.

Photodegradation of Cationic and Anioic Dyes by pH-Dependent Dispersion of Amphoteric g-C3N4 Nanosheets

2020 ◽  
Vol 20 (10) ◽  
pp. 6215-6221
Author(s):  
Qingmei Zhang ◽  
Aoli Wen ◽  
Guoliang Chen ◽  
Juan Huang ◽  
Xu Zhou ◽  
...  
Keyword(s):  
Ph Value ◽  
Cationic Dye ◽  
Amino Groups ◽  
Anionic Dye ◽  
Chromotrope 2R ◽  
Different Types ◽  
Acidic Conditions ◽  
Ph Dependent

g-C3N4 nanosheets (NSs) were prepared via H2SO4 exfoliation from the bulky g-C3N4 and the photocatalytic (PC) activities were investigated comprehensively using Rodamine B (RhB) and Chromotrope 2R (Ch2R) as candidate pollutants. The results showed that the pH value have important functions in the improvement of photodegradation performance of C3N4 NSs. RhB as cationic dye could be photodegraded more efficiently under acidic conditions while Ch2R as anionic dye was degraded easily in pH ≥ 11 solution. In particular, the Ch2R could be degraded completely within only 30 min in pH = 11 solution. It might be because the amphoteric C3N4 NSs surface with carboxyl and amino groups possessed negative and positive charges in alkaline and acidic conditions, respectively. These results presumably provided a new idea to enhance the pH-dependent photodegradation activity and degrade different types of pollutants selectively by adjusting the pH of amphoteric nanocatalyts.

High efficient dye removal with hydrolyzed ethanolamine-Polyacrylonitrile UF membrane: Rejection of anionic dye and selective adsorption of cationic dye

Chemosphere ◽  
2020 ◽  
Vol 259 ◽  
pp. 127390 ◽  
Author(s):  
Jianhua Yun ◽  
Yixing Wang ◽  
Zhenying Liu ◽  
Yujie Li ◽  
Hu Yang ◽  
...  
Keyword(s):  
Dye Removal ◽  
Selective Adsorption ◽  
Cationic Dye ◽  
Anionic Dye ◽  
High Efficient

Linear polymeric ionic liquids as phase-transporters for both cationic and anionic dyes with synergic effects

2015 ◽  
Vol 6 (39) ◽  
pp. 7060-7068 ◽  
Author(s):  
Hualei Zhao ◽  
Yanting Yu ◽  
Zonghao Li ◽  
Bin Luo ◽  
Xinhang Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Ionic Liquids ◽  
Methyl Orange ◽  
Cationic Dye ◽  
Anionic Dyes ◽  
Polymeric Ionic Liquids ◽  
Anionic Dye

Linear polymeric ionic liquids were synthesized and demonstrated to be very effective transporters for both anionic dye methyl orange (MO) and cationic dye methylene blue (MB) from water to chloroform individually as well as simultaneously.

Degradation of cationic and anionic dyes in coagulation–flocculation process using bi-functionalized silica hybrid with aluminum-ferric as auxiliary agent

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 34206-34215 ◽  
Author(s):  
Yen-Yie Lau ◽  
Yee-Shian Wong ◽  
Tjoon-Tow Teng ◽  
Norhashimah Morad ◽  
Mohd Rafatullah ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Cationic Dye ◽  
Functionalized Silica ◽  
Anionic Dyes ◽  
Methyl Orange Degradation ◽  
Anionic Dye ◽  
Coagulation Process ◽  
Flocculation Process ◽  
Silica Hybrid

Cationic dye (methylene blue) and anionic dye (methyl orange) degradation in the coagulation process was demonstrated.

Poly(p-phenylenediamine)/maghemite composite as highly effective adsorbent for anionic dye removal

2020 ◽  
Vol 146 ◽  
pp. 104436 ◽  
Author(s):  
Islam M. Minisy ◽  
Beata A. Zasońska ◽  
Eduard Petrovský ◽  
Pavel Veverka ◽  
Ivana Šeděnková ◽  
...  
Keyword(s):  
Dye Removal ◽  
Anionic Dye ◽  
Highly Effective
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