Catalytic degradation of Acid Orange 7 with hydrogen peroxide using CoxOy-N/GAC catalysts in a bicarbonate aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 84303-84310 ◽  
Author(s):  
Lian Duan ◽  
Yanling Chen ◽  
Kaixuan Zhang ◽  
Huoyan Luo ◽  
Jianxin Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Active Carbon ◽  
Nitrogen Atmosphere ◽  
Catalytic Degradation ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Phenanthroline Complex ◽  
Granular Active Carbon

The cobalt-based catalysts CoxOy-N/GAC were prepared by pyrolysis of a cobalt–phenanthroline complex on granular active carbon in nitrogen atmosphere, and tested for the degradation of Acid Orange 7 with H2O2 in a bicarbonate aqueous solution.

A New Integrated Photoreactor for Microwave Assisted Decolorization of Acid Orange 7 (AO7) in Aqueous Solutions

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Carlo Ferrari ◽  
Iginio Longo ◽  
Elpidio Tombari ◽  
Luca Gasperini
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Continuous Treatment ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Microwave Assisted ◽  
Reaction Constant ◽  
Batch Condition ◽  
Electrodeless Lamp ◽  
Effective Reaction

A new integrated photoreactor was assembled using a newly designed source, emitting both microwave power and UV radiation inside the reacting medium. The method is highly flexible and cheap, eliminating the need for the multimode and monomode microwave applicators, which are currently used for the excitation of a microwave electrodeless lamp. The characteristics of the source and the results from the decolorization of Acid Orange AO7 in an aqueous solution with hydrogen peroxide are presented. The decolorization process was carried out in batch condition and as continuous treatment and the effective reaction constant of the processes are reported. The experiments show that the photoreactor could be suitable for industrial application.

scholarly journals N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2288
Author(s):  
Ruirui Han ◽  
Yingsen Fang ◽  
Ping Sun ◽  
Kai Xie ◽  
Zhicai Zhai ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Rice Straw ◽  
Free Radical Oxidation ◽  
Catalytic Performance ◽  
Catalytic Degradation ◽  
Raw Material ◽  
Composite Catalyst ◽  
Acid Orange 7 ◽  
Radical Oxidation ◽  
Acid Orange

In this paper, using rice straw as a raw material and urea as a nitrogen precursor, a composite catalyst (a nitrogen-doped rice straw biochar at the pyrolysis temperature of 800 °C, recorded as NRSBC800) was synthesized by one-step pyrolysis. NRSBC800 was then characterized using XPS, BET, TEM and other technologies, and its catalytic performance as an activator for permonosulfate (PMS) to degrade acid orange 7 (AO7) was studied. The results show that the introduction of N-doping significantly improved the catalytic performance of NRSBC800. The NRSBC800/PMS oxidation system could fully degrade AO7 within 30 min, with the reaction rate constant (2.1 × 10 −1 min−1) being 38 times that of RSBC800 (5.5 × 10−3 min−1). Moreover, NRSBC800 not only had better catalytic performance than traditional metal oxides (Co3O4 and Fe3O4) and carbon nanomaterial (CNT) but also received less impact from environmental water factors (such as anions and humic acids) during the catalytic degradation process. In addition, a quenching test and electron paramagnetic resonance (EPR) research both indicated that AO7 degradation relied mainly on non-free radical oxidation (primarily singlet oxygen (1O2)). A recycling experiment further demonstrated NRSBC800’s high stability after recycling three times.

ADSORPTION OF ACID ORANGE 7 BY CETYLPYRIDINIUM BROMIDE MODIFIED SUGARCANE BAGASSE

2016 ◽  
Vol 78 (1-2) ◽  
Author(s):  
Nik Ahmad Nizam Nik Malek ◽  
Nurain Mat Sihat ◽  
Mahmud A. S. Khalifa ◽  
Auni Afiqah Kamaru ◽  
Nor Suriani Sani
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Sugarcane Bagasse ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Acid Orange 7 ◽  
Cetylpyridinium Bromide ◽  
Batch Mode ◽  
Acid Orange ◽  
Adsorption Data

In the present study, the adsorption of acid orange 7 (AO7) dye from aqueous solution by sugarcane bagasse (SB) and cetylpyridinium bromide (CPBr) modified sugarcane bagasse (SBC) was examined. SBC was prepared by reacting SB with different concentrations (0.1, 1.0 and 4.0 mM) of cationic surfactant, CPBr. The SB and SBC were characterized using Fourier transform infrared (FTIR) spectroscopy. The adsorption experiments were carried out in a batch mode. The effect of initial AO7 concentrations (5-1000 mg/L), initial CPBr concentrations and pH of AO7 solution (2-9) on the adsorption capacity of SB and SBC were investigated. The experimental adsorption data were analyzed using Langmuir and Freundlich isotherm models. The adsorption of AO7 onto SB and SBC followed Freundlich and Langmuir isotherm models, respectively. The maximum uptake of AO7 was obtained by SBC4.0 (SB treated with 4.0 mMCPBr) with the adsorption capacity of 144.928 mg/g. The highest AO7 removal was found to be at pH 2 and 7 for SB and SBC, respectively. As a conclusion, sugarcane bagasse modified with CPBr can become an alternative adsorbent for the removal of anionic compounds in aqueous solution.

Removal of noxious dye—Acid Orange 7 from aqueous solution using natural pumice and Fe-coated pumice stone

2015 ◽  
Vol 31 ◽  
pp. 124-131 ◽  
Author(s):  
Behzad Heibati ◽  
Susana Rodriguez-Couto ◽  
Nurdan Gamze Turan ◽  
Okan Ozgonenel ◽  
Ahmad B. Albadarin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acid Orange 7 ◽  
Pumice Stone ◽  
Acid Orange

MCM-41-based materials for the photo-catalytic degradation of Acid Orange 7

2011 ◽  
Vol 172 (1) ◽  
pp. 58-65 ◽  
Author(s):  
V. Elías ◽  
E. Vaschetto ◽  
K. Sapag ◽  
M. Oliva ◽  
S. Casuscelli ◽  
...  
Keyword(s):  
Catalytic Degradation ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Mcm 41

Fe-based MOFs for efficient adsorption and degradation of acid orange 7 in aqueous solution via persulfate activation

2016 ◽  
Vol 369 ◽  
pp. 130-136 ◽  
Author(s):  
Xianghui Li ◽  
Weilin Guo ◽  
Zhonghua Liu ◽  
Ruiqin Wang ◽  
Hua Liu
Keyword(s):  
Aqueous Solution ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Persulfate Activation
Sign in / Sign up

Export Citation Format

Share Document