Removal of phosphonates from industrial wastewater with UV/FeII, Fenton and UV/Fenton treatment

Rott, Eduard; Minke, Ralf; Bali, Ulusoy; Steinmetz, Heidrun

doi:10.1016/j.watres.2017.06.009

Cited by 114 publications

(42 citation statements)

References 30 publications

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“…$OH will be produced from UV and Fe 2+ -catalyzing H 2 O 2 (eqn (5) and (6)). 29,34,35 However, an overdose of H 2 O 2 will also react with $OH and compete with organic substrates that react with $OH, which results in a less signicant increase in treatment efficacy. Therefore, 7.5 mL L À1 will be a suitable H 2 O 2 dose to avoid wasting oxidant.…”

Section: Methodsmentioning

confidence: 99%

“…In the UV-Fenton process, Fe 2+ can catalyze H 2 O 2 to produce ROS, which degrades most organic matters. The generated Fe(OH) 2+ can be transformed to Fe 2+ and $OH in UV light (eqn (7)), 29,35 and a better treatment efficacy can be obtained. Some research has indicated that Fe 2+ of an extremely high concentration will capture ROS and reduce the removal efficiency, 25,26,36 however, this result was not found in this study.…”

Section: Methodsmentioning

confidence: 99%

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Removal of refractory organics in dinitrodiazophenol industrial wastewater by an ultraviolet-coupled Fenton process

Ran

2019

RSC Adv.

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A significant amount of biorefractory organic wastewater is generated during the production of dinitrodiazophenol (DDNP). In this study, ultraviolet light (254 nm) that was coupled with the Fenton (UV-Fenton) process was applied to treat refractory organics in DDNP industrial wastewater. The effects of key parameters (i.e., H 2 O 2 dose, Fe 2+ dosage, and initial pH) on the treatment efficacy for DDNP industrial wastewater by the UV-Fenton process was investigated systematically. Alcohol quenching experiments were carried out to identify reactive oxygen species in the UV-Fenton process. The treatment efficacy and degradation characteristics of refractory organics were studied and compared by using control experiments. Increasing H 2 O 2 and Fe 2+ doses could lead to improved treatment results to a different extent. A more intense reaction and better treatment results were achieved by using the UV-Fenton process at lower pH conditions. Under optimal conditions of H 2 O 2 dose ¼ 7.5 mL L À1 , Fe 2+ dosage ¼ 0.05 mM, and initial pH ¼ 5.0, the pseudo-first order constants k for chemical oxygen demand removal and color number removal were 0.18 min À1 and 1.24 min À1 , and the chemical oxygen demand and color number removal efficiencies were 74.24% and 99.94%, respectively. The treatment results for the UV-Fenton process were better than other processes under the same conditions, and a significant synergetic effect was observed for the UV-Fenton process. Alcohol quenching experiments indicated that the predominant reactive oxygen species in the UV-Fenton process was the hydroxyl radical ($OH). Because more $OH was produced, the UV-Fenton process exhibited a much better treatment performance in degrading and destroying organic structures (i.e., benzene rings, -NO 2 , and -N]N-). Furthermore, the biodegradability indicated by the biological oxygen demand/chemical oxygen demand ratio was improved considerably to 0.48 from 0.054. The good treatment performance by UV-Fenton allowed for a more efficient electrical energy consumption compared with the UV and UV-H 2 O 2 . This study provides a theoretical reference for DDNP industrial wastewater treatment by using the UV-Fenton process.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Removal of refractory organics in dinitrodiazophenol industrial wastewater by an ultraviolet-coupled Fenton process

Ran

2019

RSC Adv.

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“…Next, 50 mL of raw sample A acidified to pH 2.5 by means of H 2 SO 4 were added to each bottle, various volumes of hydrogen peroxide (333 g/L H 2 O 2 ) were added and stirred on a magnetic stirrer at a speed of 400 rpm for 60 min. The concentrations dosed were 0-574 mg/L Fe II and 0-1913 mg/L H 2 O 2 , which corresponds to 0-100% of the stoichiometrically required amount of oxidant according to COD of the raw sample [42]. In each batch, the ratio of Fe II to H 2 O 2 was 0.3 g/g and 0.18 mol/mol, respectively.…”

Section: Experiments Regarding Fenton Methods (Fe II /H 2 O 2 )mentioning

confidence: 99%

“…Experiments with wastewaters high in complexing agent concentrations-and raw sample A was such a wastewater-had shown that this variant is preferable over the variant with direct neutralization after the 60-min contact time [42]. Thus, the COD was reduced with an increasing dosage quantity to an asymptotically approximated minimum value of approximately 50 mg/L.…”

Section: Experiments Regarding Fenton Methods (Fe II /H 2 O 2 )mentioning

confidence: 99%

Detoxification of Pesticide-Containing Wastewater with FeIII, Activated Carbon and Fenton Reagent and Its Control Using Three Standardized Bacterial Inhibition Tests

Rott

Pittmann²,

Wasielewski

et al. 2017

Water

Self Cite

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Discharge of toxic industrial wastewaters into biological wastewater treatment plants may result in inhibition of activated sludge bacteria (ASB). In order to find an appropriate method of detoxification, the wastewater of a pesticide-processing plant in Vietnam was treated with three different methods (Fe III , powdered activated carbon (PAC), Fenton (Fe II /H 2 O 2 )) analyzing the detoxification effect with the nitrification inhibition test (NIT), respiration inhibition test (RIT) and luminescent bacteria test (LBT). The heterotrophic ASB were much more resistant to the wastewater than the autotrophic nitrificants. The NIT turned out to be more suitable than the RIT since the NIT was less time-consuming and more reliable. In addition, the marine Aliivibrio fischeri were more sensitive than the nitrificants indicating that a lack of inhibition in the very practical and time-efficient LBT correlates with a lack of nitrification inhibition. With 95%, the Fenton method showed the highest efficiency regarding the chemical oxygen demand (COD) removal. Although similar COD removal (60-65%) was found for both the Fe III and the PAC method, the inhibitory effect of the wastewater was reduced much more strongly with PAC. Both the NIT and the LBT showed that the PAC and Fenton methods led to a similar reduction in the inhibitory effect.

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“…This is probably due to the overlooked role of non-orthophosphates on eutrophication and the technical challenge in recovering P from non-orthophosphates. A few exceptions were the use of advanced oxidation processes as pretreatment to convert non-orthophosphate to orthophosphate [168][169][170]. However, to our knowledge, there are no approaches which can achieve a one-step P removal and recovery from non-orthophosphates.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical phosphorus removal and recovery

Lei¹

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Removal of phosphonates from industrial wastewater with UV/FeII, Fenton and UV/Fenton treatment

Cited by 114 publications

References 30 publications

Removal of refractory organics in dinitrodiazophenol industrial wastewater by an ultraviolet-coupled Fenton process

Removal of refractory organics in dinitrodiazophenol industrial wastewater by an ultraviolet-coupled Fenton process

Detoxification of Pesticide-Containing Wastewater with FeIII, Activated Carbon and Fenton Reagent and Its Control Using Three Standardized Bacterial Inhibition Tests

Electrochemical phosphorus removal and recovery

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