Degradation of bisphenol A using sonochemical reactions

Inoue, Marcio; Masuda, Yukihiro; Okada, Fumio; Sakurai, Akihiko; Takahashi, Ichiro; Sakakibara, Mikio

doi:10.1016/j.watres.2007.10.006

Cited by 125 publications

(58 citation statements)

References 17 publications

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“…The air-to-water ratio must be very high to effectively remove BPA, which increases the cost of treatment. Non-conventional treatment techniques have been examined for the degradation of BPA, including TiO 2 photocatalyst [25], photo-Fenton process [26], sonochemical reaction [27], UV photolysis [28], and ozonation [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Ozonation of aqueous solution containing bisphenol A: Effect of operational parameters

Garoma

Matsumoto

2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Ozonation of aqueous solution containing bisphenol A: Effect of operational parameters

Garoma

Matsumoto

2009

Journal of Hazardous Materials

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“…Aromatic compounds (benzoquinone, hydroquinone and hydroxylated BPA) and aliphatic compounds (maleic acid) were identified by Cui et al [6] in treating a synthetic solution containing BPA using different anode materials (Ti/BDD, Ti/Sb-SnO 2 , Ti/RuO 2 and Pt). Inoue et al [34] recorded some aromatic intermediates (such as 3-hydroxybisphenol-A, methylethenylphenol, hydroquinone and benzoquinone, etc.) and aliphatic intermediates (such as formaldehyde and organic acids) while using ultrasonication at a frequency of 404 kHz and intensities varying from 3.5 to 12 kW m -2 .…”

Section: By-product Formation and Proposed Mechanism Of Bpa Degradationmentioning

confidence: 99%

Electrochemical treatment of bisphenol-A using response surface methodology

et al. 2012

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The decomposition of bisphenol-A (BPA) in synthetic solution and in municipal effluent was investigated using an electro-oxidation process. Electrolysis was conducted using a cylindrical electrolytic cell containing two circular anodes (expanded metal) and two circular cathodes (stainless steel) alternated in the electrode pack. Different anode materials (Ti/SnO 2 , Ti/IrO 2 and Ti/PbO 2 ) were tested, and Ti/PbO 2 was found to be the most effective electrode for BPA degradation. An experimental design methodology (2 3 Box-Behnken design) was applied to determine the optimal experimental conditions in terms of cost effectiveness. The BPA concentration (C 0 = 1.0 mg l -1 ) could be optimally diminished by up to 90% by applying a current intensity of 2.0 A for a 100-min reaction period in the presence of 250 mg Na 2 SO 4 l -1 (used as a supporting electrolyte). Then, the optimal conditions were applied on a municipal wastewater effluent (sampled after secondary treatment) artificially contaminated with 1 mg BPA l -1 without the addition of a supporting electrolyte. The treatment was more effective with the municipal effluent due to the presence of a high concentration of chloride ions that could easily be transformed into active chlorine. BPA could be oxidized by both direct anodic electrochemical oxidation (by means of OHÁ) and indirect electrochemical oxidation via mediators, such as hypochlorous acid generated by chloride oxidation. Both actions (direct and indirect effects) lead to the formation of powerful oxidizing agents capable of rapidly oxidizing BPA.

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“…It is a highly corrosive and nerve poisoning agent. Ingestion of phenol contaminated products causes harmful side effects such as dyspnoea, gastrointestinal effects, and liver and kidney damage in long-term exposure [4]. In Europe alone more than 1.6 million tons of phenol is consumed in manufacturing annually from which 11 200 tons are discharged in environment due not sufficient wastewater treatment [5].…”

Section: Introductionmentioning

confidence: 99%

Factors Governing Degradation of Phenol in Pharmaceutical Wastewater by White-rot Fungi: A Batch Study

Bernats¹,

Juhna²

2015

TOBIOTJ

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Phenol is a major contaminant in the industrial water effluent, including pharmaceutical wastewaters. Although several physic-chemical methods for removal of phenol exist, they are of high cost, low efficiency, and generate toxic byproducts. Thus, there is a need to develop technologies for biological removal of phenol from wastewater. In this study, the degradation of phenol in pharmaceutical wastewater by monoculture of white-rot fungi was studied. The degradation rate of total phenol in batch flasks by four fungal monocultures of Trametes versicolor, Phanerochaete chrysosporium, Gloeophyllum trabeum and Irpex lacteus in synthetic medium was compared. The results showed that white-rot fungus T.Versicolor was the most effective of the species. Further selection tests of optimal conditions of biomass concentration, pH and temperature were done, indicating that optimal conditions of degradation are at pH 5-6, temperature 25 o C, and biomass inoculum 10% (v/v). Under optimal conditions, total phenol was reduced by 93%, concentration of total phenol decreasing from 420±12 mg/l to 29±1 mg/l in seven days, with T.Versicolor specie. This study suggested that biological treatment with fungi may effectively be used as a pre-treatment stage for removal of phenol before polishing wastewater with conventional biological methods.

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Degradation of bisphenol A using sonochemical reactions

Cited by 125 publications

References 17 publications

Ozonation of aqueous solution containing bisphenol A: Effect of operational parameters

Ozonation of aqueous solution containing bisphenol A: Effect of operational parameters

Electrochemical treatment of bisphenol-A using response surface methodology

Factors Governing Degradation of Phenol in Pharmaceutical Wastewater by White-rot Fungi: A Batch Study

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