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

Coagulation-flocculation of azo dye Acid Orange 7 with green refined laterite soil

2014 ◽  
Vol 246 ◽  
pp. 383-390 ◽  
Author(s):  
Yen-Yie Lau ◽  
Yee-Shian Wong ◽  
Tjoon-Tow Teng ◽  
Norhashimah Morad ◽  
Mohd Rafatullah ◽  
...  
Keyword(s):  
Azo Dye ◽  
Acid Orange 7 ◽  
Laterite Soil ◽  
Acid Orange

Notes on heterogeneous photocatalysis with the model azo dye acid orange 7 on TiO2

2012 ◽  
Vol 106 (2) ◽  
pp. 297-311 ◽  
Author(s):  
Michal Baudys ◽  
Martin Zlámal ◽  
Josef Krýsa ◽  
Jaromír Jirkovský ◽  
Petr Kluson
Keyword(s):  
Azo Dye ◽  
Heterogeneous Photocatalysis ◽  
Acid Orange 7 ◽  
Acid Orange

Anaerobic treatment of azo dye Acid Orange 7 under fed-batch and continuous conditions

2005 ◽  
Vol 39 (5) ◽  
pp. 771-778 ◽  
Author(s):  
D. Méndez-Paz ◽  
F. Omil ◽  
J.M. Lema
Keyword(s):  
Azo Dye ◽  
Anaerobic Treatment ◽  
Acid Orange 7 ◽  
Fed Batch ◽  
Acid Orange

scholarly journals Degradation of azo dye acid orange 7 in a membrane bioreactor by pellets and attached growth of Coriolus versicolour

2013 ◽  
Vol 141 ◽  
pp. 29-34 ◽  
Author(s):  
Faisal I. Hai ◽  
Kazuo Yamamoto ◽  
Fumiyuki Nakajima ◽  
Kensuke Fukushi ◽  
Long D. Nghiem ◽  
...  
Keyword(s):  
Azo Dye ◽  
Membrane Bioreactor ◽  
Acid Orange 7 ◽  
Attached Growth ◽  
Acid Orange ◽  
Degradation Of Azo Dye

scholarly journals Effect of Sonication Pre-treatment of TiO2 Catalyst for Photo-Degradation of Acid Orange 7 Azo Dye

2019 ◽  
Vol 11 (2) ◽  
pp. 22
Author(s):  
D. K. Kariuki ◽  
P. K. Tum
Keyword(s):  
Azo Dye ◽  
Crystal Size ◽  
Dye Degradation ◽  
Ultra Violet ◽  
Acid Orange 7 ◽  
Photo Degradation ◽  
Acid Orange ◽  
Violet Light ◽  
Pre Treatment ◽  
Scanning Electron

In this study, Acid Orange 7 azo dye was degraded on TiO2 catalyst layer illuminated with ultra-violet light. The TiO2 suspension had prior been sonicated at 20 kHz before electrophoretic deposition on smooth stainless steel surfaces, with the aim of increasing the efficiency of azo dyes degradation. The effect of sonication on the TiO2 suspension of 10 g.L-1 and electrophoretic deposition loading to layers on surfaces was studied. Morphological properties of the electrophoretic layers from two different suspensions, Alpha and Sigma TiO2 were characterized by Scanning Electron Microscopy to establish the specific surface properties, particle loading and crystalline sizes. A four–position reactor was used for dye degradation experiments under Ultra Violet light at 355 nm wavelength. The degradation of the azo dye was monitored at 30minutes interval for a total of 2 hours using Ultra Violet-Visible Spectrophotometer at λ = 485 nm. It was found out that 60% of dye degradation was achieved after 120 minutes without sonication pretreatment. Sonication pre-treatment resulted in 71.42% increase on the rate of photo-degradation, at a loading of 0.32 mg/cm2. Particulate layers coated with Alpha TiO2 showed more photoactivity compared to Sigma TiO2. Scanning Electron Microscopy indicated that Alpha TiO2 had  50 m2/g surface area and  28 nm crystal size compared to Sigma TiO2 with 10 m2/g and 169 nm crystal size. This study shows that sonication pretreatment of Alpha TiO2 /UV light system is most effective in photo-degrading Acid Orange 7 dye.

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