Decolorization of Acid Orange 7 with peroxymonosulfate oxidation catalyzed by granular activated carbon

Abstract In this study, powder activated carbon (PAC) utilized to activate peroxydisulfate (PDS) was investigated for decolorization of Acid Orange 7 (AO7). The results indicated a remarkable synergistic effect in the PAC/PDS system. The effect of PAC, PDS dosages and initial pH on AO7 decolorization were studied and the processes followed first-order kinetics. Response surface method with central composite design (CCD) model was utilized to optimize these three factors and analyze the combined interaction. The optimum condition for the decolorization rate of AO7 was analyzed as the following: PAC (0.19 g/L), PDS (1.64 g/L), and initial pH (4.14). Cl− and SO42− showed a promoting effect on AO7 decolorization while HCO3− had a slightly inhibiting effect. Quenching experiments confirmed that both sulfate and hydroxyl radicals were the oxidizing species, and the oxidation reaction occurred on the surface of PAC. The results of UV-vis spectrum with 100% decolorization rate and the 50% total organic carbon reduction indicated highly efficient decolorization and mineralization of AO7 in the PAC/PDS system. Finally, the recovery performance of PAC was studied and the result indicated PAC had poor reuse in reactivity.

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Electrochemical/Fe3+/peroxymonosulfate system for the degradation of Acid Orange 7 adsorbed on activated carbon fiber cathode

Chemosphere ◽

10.1016/j.chemosphere.2019.125125 ◽

2020 ◽

Vol 241 ◽

pp. 125125 ◽

Cited By ~ 6

Author(s):

Zhihua Sun ◽

Shiyao Li ◽

Haojie Ding ◽

Yunhua Zhu ◽

Xuxu Wang ◽

...

Keyword(s):

Activated Carbon ◽

Carbon Fiber ◽

Activated Carbon Fiber ◽

Acid Orange 7 ◽

Acid Orange

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Sorption of Methylene Blue and Acid Orange 7 onto Ananas comosus Peels and Leaves Based Activated Carbon

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.330.112 ◽

2013 ◽

Vol 330 ◽

pp. 112-116 ◽

Cited By ~ 2

Author(s):

Nabilah A. Lutpi ◽

N. Najihah Jamil ◽

C.K. Kairulazam C.K. Abdullah ◽

Yee Shian Wong ◽

Soon An Ong ◽

...

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Contact Time ◽

Time Effect ◽

Ananas Comosus ◽

Acid Orange 7 ◽

Initial Concentration ◽

Adsorbent Dosage ◽

Acid Orange ◽

Percentage Removal

The adsorption of Methylene Blue (MB) and Acid Orange 7 (AO7) dye onto Ananas Comosus Mixed Peels and Leaves (ACMPL) were carried out by conducting four different parameters such as initial concentration, pH, dosage of adsorbent, and contact time. Effect of initial concentration for both dyes showed that higher initial concentration would take longer contact time to attain equilibrium due to higher amount of adsorbate molecules. The effect of pH showed highest percentage removal for MB is at pH 9 which is 95.81%. Meanwhile for AO7 the highest percentage removal is 31.06% at pH 3. The percentage removal of MB had reached the equilibrium at dosage 0.5g while AO7 keep increasing with the increment of adsorbent dosage. The percentage removal of MB and AO7 had increased until hour 2.5 which was from 72.5% to 86.93% and 19.441% to 36.89% respectively and reached equilibrium at 3 hour contact time.

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