In this research, the oxidation of an azo dye (methyl-orange) by H2O2, in an aqueous solution, using a Dawson-type heteropolyanion (α2P2W12Mo5O61Fe)7− as catalyst was studied. The effects of different parameters dye oxidation were investigated. The studied parameters were: the initial pH, the initial H2O2 concentration, the catalyst mass and the initial dye concentration. The optimal conditions for a maximum discoloration efficiency (100 %) are: pH: 6, [MO]0 = 2 mg/L, Catalyst (α2P2W12Mo5O61Fe)7− mass: 1 g, [H2O2]0 =: 0.072 M. The effect of other Dawson-mixed heteropolyanions, such as (αP2W18O62)6−, (αP2W12Mo6O62)6− and (α2P2W12Mo5O61X)n− (X = Ni2+,Cr3+,Cu2+) on the dye oxidation at room temperature was evaluated. The stability of the catalyst after reaction was verified.
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Univ Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, Malaysia
Univ Baghdad, Fac Sci Women, Dept Chem, Baghdad, IraqUniv Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, Malaysia
Tareq, Sarhan Sanaa
Saiman, Mohd. Izham
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Univ Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, MalaysiaUniv Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, Malaysia
Saiman, Mohd. Izham
Hin, Taufiq-Yap Yun
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Univ Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, MalaysiaUniv Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, Malaysia
Hin, Taufiq-Yap Yun
Abdullah, Abdul Halim
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Univ Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, MalaysiaUniv Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, Malaysia
Abdullah, Abdul Halim
Rashid, Umer
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Univ Putra Malaysia, Inst Adv Technol, Serdang 43400, Selangor, MalaysiaUniv Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Serdang 43400, Selangor, Malaysia
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Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, SpainUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
Isarain-Chavez, Eloy
Baro, Maria Dolors
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Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, SpainUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
Baro, Maria Dolors
Rossinyol, Emma
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Univ Autonoma Barcelona, Serv Microscopia, E-08193 Bellaterra, SpainUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
Rossinyol, Emma
Morales-Ortiz, Ulises
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Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Ave San Rafael Atlixco 186, Mexico City 09340, DF, MexicoUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
Morales-Ortiz, Ulises
Sort, Jordi
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Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
ICREA, Pg Lillis Co 23, E-08010 Barcelona, SpainUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
Sort, Jordi
Brillas, Enric
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Univ Barcelona, Fac Quim, Dept Quim Fis, Lab Electroquim Mat & Medi Ambient, Marti & Franques 1-11, E-08028 Barcelona, SpainUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain
Brillas, Enric
Pellicer, Eva
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Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, SpainUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain