Degradation of AR 97 aqueous solution by combination of ultrasound and Fenton reagent

Li, Ji‐Tai; Song, Yali

doi:10.1002/ep.10375

Cited by 19 publications

(5 citation statements)

References 25 publications

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“…However, when 30 mg L ¡1 of Fe 2C was used, the degradation and mineralization of alachlor was slightly lower than that at 20 mg L ¡1 Fe 2C . This result could be explained by the observations made by Li and Song, [9] who observed that excess Fe 2C reacts with OH to produce Fe 3C and subsequently quenches the OH oxidation reaction. The ratios of TOC removal/alachlor degradation in Fig.…”

Section: Wang and Z Liumentioning

confidence: 60%

“…Therefore, in this study, the same concentration (50 mg L ¡1 ) was used for the six anions to investigate the effects of anion type. Li and Song [9] investigated the effects of PO 4 3¡ , Cl ¡ , and SO 4 2¡ on the decolorization of AR97 dye wastewater using a combination of ultrasound and Fenton reagents, and found that anions would react with OH radicals. This reaction consumes OH radicals in the solution phase, which decreases the decolorization rate.…”

Section: Effects Of Anion Additionmentioning

confidence: 99%

“…Therefore, TOC removal could result from thermal cleavage inside cavitation bubbles. [4,10] Li and Song [9] and € Ozdemir et al [11] proposed that increasing the H 2 O 2 concentration in the sono-Fenton process increases the degradation efficiency of organic compounds, but excess H 2 O 2 would react with OH and Degradation of alachlor using an enhanced sono-Fenton process decrease the degradation efficiency. Based on the above description, the addition of adequate concentrations of H 2 O 2 is a key parameter when conducting the ultrasound/ Fe 2C /H 2 O 2 process.…”

Section: Wang and Z Liumentioning

confidence: 99%

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Degradation of alachlor using an enhanced sono-Fenton process with efficient Fenton's reagent dosages

Wang

Liu

2015

Journal of Environmental Science and Health, Part B

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In this study, an enhanced sono-Fenton process for the degradation of alachlor is presented. At high ultrasonic power, low pH, and in the presence of adequate Fenton's reagent dosages, alachlor degradation can reach nearly 100%. The toxicity of treated alachlor wastewater, which was measured by changes in cell viability, slightly decreased after the Fenton or ultrasound/H2O2 process and significantly decreased after the enhanced sono-Fenton process. A satisfactory relationship was observed between the total organic carbon removal and cell viability increment, indicating that alachlor mineralization is a key step in reducing the toxicity of the solution. The formation of alachlor degradation byproducts was observed during the oxidation process, in which the first step was the substitution of a chloride by a hydroxyl group. In conclusion, the enhanced sono-Fenton process was effective in the degradation and detoxification of alachlor within a short reaction time. Thus, the treated wastewater can then be passed through a biological treatment unit for further treatment.

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Section: Wang and Z Liumentioning

confidence: 60%

Section: Effects Of Anion Additionmentioning

confidence: 99%

Section: Wang and Z Liumentioning

confidence: 99%

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Degradation of alachlor using an enhanced sono-Fenton process with efficient Fenton's reagent dosages

Wang

Liu

2015

Journal of Environmental Science and Health, Part B

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“…Fenton oxidation is known as a highly pH dependent process, since pH affects the mechanism of HO • production in the Fenton reaction . The effect of initial pH in conventional and modified Fenton processes is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Advanced treatment of coking wastewater by conventional and modified fenton processes

Güçlü

Şirin

Şahinkaya

et al. 2011

Env Prog and Sustain Energy

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Coking wastewater contains high a concentration of refractory and toxic compounds to be treated before being discharged into the environment. The water quality usually cannot meet the discharge limits after conventional biological treatment processes. This article initially investigated the treatability of coking wastewater with conventional and modified Fenton processes for advanced treatment of coking wastewater. Based on the experimental results, up to 86% of chemical oxygen demand (COD) and 99.5% of phenol removals were achieved by the conventional Fenton process at original pH 7.8 within 60 min. pH adjustment was not performed due to the sudden drop in the original pH value, after the addition of Fenton's reagents. A modified Fenton process yielded comparable COD (82%) and phenol (98.5%) removals within 120 min at pH 3.0. The optimal operating conditions were determined as [Fe2+] = 300 mg/L, [H2O2] = 4000 mg/L, and pH = 7.8 for a conventional Fenton process, and [Fe0] = 300 mg/L, [H2O2] = 4500 mg/L, and pH = 3 for a modified Fenton process. © 2011 American Institute of Chemical Engineers Environ Prog, 32: 176‐180, 2013

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“…The form of iron that functions as a catalyst changes as the pH changes, affecting the efficacy of the reaction. pH fluctuations also have an impact on the amount of oxidizing HO • radical (Li & Song, 2010). The study examined the optimum iron and H 2 O 2 dosages in the pH between 2 and 8.…”

Section: Determination Of Optimum Phmentioning

confidence: 99%

Ultrasound‐assisted photo‐Fenton process for treatment of pulp and paper mill wastewater and reduction of phytotoxicity

Olabi

2023

Water & Environment J

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The efficiency of classical Fenton (CF) and modified Fenton (MF) as well as photo‐Fenton processes in real wastewater treatment of pulp and paper (P&P) mill was investigated in this study. The chemical oxygen demand (COD) was chosen as the reference measurement for evaluating the treatment's efficiency. After determining the optimum parameters for each process, the effect of adding ultrasound (US) on improving treatment efficiency was examined. In addition, kinetic study and phytotoxicity analysis were conducted under optimum conditions for all processes. With pH 4, reaction time 50 min, 1.2 g/L Fe2+ and 8 g/L H2O2 dosages, the best removal efficiency (RE) of COD was determined to be 82.18% in CF process, and this rate rose to 90.1% when US was added. The best RE in MF process was 84.16% with the application of UV‐C, pH 4, reaction time 50 min, 1 g/L Fe0 and 8 g/L H2O2 doses, although it increased to 93.4% when US was applied. The greatest results in the seed germination test were achieved in US processes with 100% of germination percentage (GP) for spinach and tomato and 90% for cress. In the economic evaluation, when conducting the treatment without US, the estimated relative cost decreased in a 15 and 16%, for CF/UV‐C and CF processes respectively, whereas the CF process was 64% cheaper than the MF process in all applications. The US contributed to enhanced water treatment efficiency by having a significant synergistic impact on Fenton applications. Hence, the combination of photo‐Fenton and ultrasound to treat effluent from P&P mills proved to be an effective and promising technique.

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Degradation of AR 97 aqueous solution by combination of ultrasound and Fenton reagent

Abstract: , others had a negative effect on degradation.

Cited by 19 publications

References 25 publications

Degradation of alachlor using an enhanced sono-Fenton process with efficient Fenton's reagent dosages

Degradation of alachlor using an enhanced sono-Fenton process with efficient Fenton's reagent dosages

Advanced treatment of coking wastewater by conventional and modified fenton processes

Ultrasound‐assisted photo‐Fenton process for treatment of pulp and paper mill wastewater and reduction of phytotoxicity

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