Nitrite-enhanced copper-based Fenton reactions for biofilm removal

Wang, Li; Peng, Rui; Xue, Liang; Heng, C.; Miao, Yanni; Wang, Wei; Carrier, Andrew; Oakes, Ken D.; Zhang, Xu

doi:10.1039/d1cc00374g

Cited by 9 publications

(2 citation statements)

References 44 publications

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“…Wang et al. [ 59 ] recently revealed that nitrite might accelerate the redox cycle of Cu(II) into Cu(I), which can be used to improve biofilm destruction using copper‐based Fenton reactions. The non‐further increase of the pararosaniline degradation rate with increasing nitrite dosage from 1 to 10 × 10 −3 m may be explained in the same way that an excess of H 3 NOH + , where the radicals quench by NO 2 − [Equations (21) and (22)] is becoming the dominating mechanism.…”

Section: Resultsmentioning

confidence: 99%

“…These results suggest that nitrite may serve as a ferric ion reductant, similar to hydroxylamine, albeit with a lower reduction due to the larger rate constant between NO 2 − and • OH (k = 1 × 10 10 m −1 s −1 , compared to <1 × 10 10 m −1 s −1 for the reaction of H 3 NOH + with • OH). Wang et al [59] recently revealed that nitrite might accelerate the redox cycle of Cu(II) into Cu(I), which can be used to improve biofilm destruction using copper-based Fenton reactions. The non-further increase of the pararosaniline degradation rate with increasing nitrite dosage from 1 to 10 × 10 −3 m may be explained in the same way that an excess of H 3 NOH + , where the radicals quench by NO 2 − [Equations ( 21) and ( 22)] is becoming the dominating mechanism.…”

Section: Effects Of Mineral Anions and Natural Organic Mattermentioning

confidence: 99%

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Protonated Hydroxylamine‐Assisted Iron Catalytic Activation of Persulfate for the Rapid Removal of Persistent Organics from Wastewater

Merouani¹,

Dehane

Belghit³

et al. 2022

CLEAN Soil Air Water

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This research aims at optimizing the effects of processing conditions, salts, natural organic materials, and water matrices quality on the effectiveness of the Fe(II)/K2S2O8/hydroxylamine process in the degradation of pararosaniline. Assisting the Fe(II)/KPS (potassium persulfate) treatment with protonated hydroxylamine (H3NOH+) increases the degradation rate of pararosaniline by more than 100%. Radical scavenger experiments show that the SO4●− radical dominates pararosaniline degradation in the Fe(II)/KPS system, whereas ●OH is the dominant reactive species in the presence of H3NOH+. The disparity in pararosaniline removal effectiveness upon the Fe(II)/KPS/H3NOH+ and Fe(II)/KPS systems gets more significant with increasing reactants doses (i.e., H3NOH+, H2O2, Fe(II)) and solution pH (2–7). Interestingly, H3NOH+ increased the working pH to 6 instead of pH 4 for the Fe(II)/KPS process. Moreover, mineral anions such as Cl−, NO3−, NO2−, and SO4− (up to 10 × 10−3 m) do not affect the efficiency of the Fe(II)/KPS/H3NOH+ process. In contrast, acid humic decreases the performance of the process by ≈20%. In natural mineral water, treated wastewater, and river water samples, the Fe(II)/KPS/H3NOH+ process maintains higher degradation performance (≈95%), whereas the process efficiency is greatly amortized in seawater. The efficiency of the Fe(II)/KPS process was drastically decreased in the various water matrices.

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Mineral Anions and Natural Organic Mattermentioning

confidence: 99%