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Online Spectrometric Decolorization of Rhodamine B and Acid Yellow G by Homogeneous Cobalt-Activated Peroxymonosulphate Reaction


Affiliations
1 Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China
 

Homogeneous cobalt-activated peroxymonosulphate reaction (Co2+/PMS) was applied to decolorize Rhodamine B (RhB) and Acid Yellow G (AYG) and the main experimental parameters (nitrate cobalt concentration, PMS dosage, pH) were investigated. At the optical condition (1 mg/L Co(NO3)2, 20 mg/L PMS and pH=7 for RhB; 10 mg/L Co(NO3)2, 65 mg/L PMS and pH=9 for AYG ), the colour removal of RhB and AYG were 99.5% and 98% respectively. Plus, Mn+/PMS process (Cu2+/PMS, Mn2+/PMS, Ni2+/PMS, Fe3+/PMS, Fe2+/PMS) was carried out to study the catalytic effect of similar activators with same molar concentration. The evidence indicates that Fe2+ and Cu2+ ion are more reactive compared to other ions, while that catalysis is still incomparable to cobalt ion. Furthermore, in Co2+/PMS process, the acid dyes (Acid Red 6B, Acid Yellow G, Acid Blue) were found to become more degradable at alkaline condition (pH 9) than neutral solution.

Keywords

Homogeneous Co2+/PMS, Decolorization, Rhodamine B, Acid Yellow G.
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  • Online Spectrometric Decolorization of Rhodamine B and Acid Yellow G by Homogeneous Cobalt-Activated Peroxymonosulphate Reaction

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Authors

Hang Xu
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China
Beibei Liu
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China
Tianlong Yu
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China
Fengmin Wu
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China
Airong Xu
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China

Abstract


Homogeneous cobalt-activated peroxymonosulphate reaction (Co2+/PMS) was applied to decolorize Rhodamine B (RhB) and Acid Yellow G (AYG) and the main experimental parameters (nitrate cobalt concentration, PMS dosage, pH) were investigated. At the optical condition (1 mg/L Co(NO3)2, 20 mg/L PMS and pH=7 for RhB; 10 mg/L Co(NO3)2, 65 mg/L PMS and pH=9 for AYG ), the colour removal of RhB and AYG were 99.5% and 98% respectively. Plus, Mn+/PMS process (Cu2+/PMS, Mn2+/PMS, Ni2+/PMS, Fe3+/PMS, Fe2+/PMS) was carried out to study the catalytic effect of similar activators with same molar concentration. The evidence indicates that Fe2+ and Cu2+ ion are more reactive compared to other ions, while that catalysis is still incomparable to cobalt ion. Furthermore, in Co2+/PMS process, the acid dyes (Acid Red 6B, Acid Yellow G, Acid Blue) were found to become more degradable at alkaline condition (pH 9) than neutral solution.

Keywords


Homogeneous Co2+/PMS, Decolorization, Rhodamine B, Acid Yellow G.

References