Use of reversed-phase HPLC with solid-phase extraction for monitoring of radiolytic degradation of chlorophenols for environmental protection

Trojanowicz, Marek; Chudziak, A.; Bryl-Sandelewska, T.

doi:10.1007/bf02034625

Cited by 15 publications

(7 citation statements)

References 24 publications

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“…This is consistent with the previous observation of a faster dechlorination for high-chlorinated aliphatic compounds indicated by Scherer et al [26]. Trojanowicz et al [27] found that higher chloro-substituted phenols can per- form faster reductive reactions. It is known that highly chlorinated compounds are generally more sensitive to reductive dechlorination than their lower chlorinated analogues [16,26,28].…”

Section: Effect Of Different Brominated Pbde Congenerssupporting

confidence: 89%

Photolytic degradation of polybromodiphenyl ethers under UV-lamp and solar irradiations

Shih

Wang

2009

Journal of Hazardous Materials

106

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Section: Effect Of Different Brominated Pbde Congenerssupporting

confidence: 89%

Photolytic degradation of polybromodiphenyl ethers under UV-lamp and solar irradiations

Shih

Wang

2009

Journal of Hazardous Materials

106

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“…The radiolytic degradation of organic pollutants (Trojanowicz et al 1997) usually results in the formation of organic acids (Getoff 1996) as the total organic carbon content in the irradiation solutions decreases (Getoff and Solar 1986).…”

Section: Resultsmentioning

confidence: 99%

“…Efficient removal of benzene and chlorinated benzenes in effluents is of importance for environmental protection (Trojanowicz et al 1997). The radiolytic degradation of halogenated alkyl and aromatic hydrocarbons for environmental purposes has been the subject of several papers (e.g., Nickelsen et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Radiation-Induced Degradation and the Effect of Scavengers on Benzene, Monochlorobenzene and 1,2-Dichlorobenzene in Aqueous Solutions

Takriti

2004

Water Quality Research Journal

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The degradation of benzene, monochlorobenzene and 1,2-dichlorobenzene in aqueous solution by gamma irradiation was investigated. The effect of the irradiated solution composition was studied. The results showed that benzene is more resistant to destruction than chlorinated benzenes. The presence of oxidizing and reducing reactive species and the rapid reaction rates with halogenated benzenes increased the degradation rate of the pollutants. Dechlorination of CB and 1,2-DCB was observed. High performance liquid chromatography (HPLC) and spectroscopy (UV-Vis) were used to monitor changes in the radiation solutions. The final aqueous irradiation products were shown to be a complex mixture of by-products. The addition of scavengers such as methanol and ethanol required larger doses to decompose the pollutants when compared to those solutions with no additives.

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“…These methods include processes based on hydrogen peroxide, photolysis, photocatalysis, and ozone, reviewed by Esplugas et al [21]. The investigation of the degradation of chlorophenolic compounds including 2-CP using gamma irradiation from 60 Co was reported by other studies and was limited to (a) single target concentration and lacked vital information regarding the relation between target concentration and absorbed doses, (b) not studying the effect of changing the pH value on radiolytic degradation, (c) not covering the effect of adding a strong oxidizing agent such as H 2 O 2 on 2-CP degradation effi ciency, and (d) not investigating the toxicity of degradation by-products in varied pH media or under the effect of a strong oxidizing agent such as H 2 O 2 [22][23][24][25][26] and others. These limitations are overcome by the present study.…”

Section: Introductionmentioning

confidence: 99%

Degradation and detoxification of 2-chlorophenol aqueous solutions using ionizing gamma radiation

2017

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Chlorophenols are compounds with high toxicity, poor biodegradability, and carcinogenic and recalcitrant properties. This work studies, for the first time, the destruction and detoxification of 2-chlorophenol (2-CP) in water using 60Co gamma radiation under different conditions including varied radiation doses, addition of hydrogen peroxide (H2O2), and varied pH values. High-performance liquid chromatography (HPLC) and ion chromatography (IC) confirmed a successful degradation of 2-CP to primarily yield phenol molecules and chloride anions. A radiation dose as low as 25 kGy achieved approximately 90% removal of 50–150 ppm of 2-CP in neutral water. However, the addition of a strong oxidizer such as H2O2 to 2-CP solutions reduced the required dose to achieve 90% removal to at least 1.3-fold. The reduction in radiation doses was also observed in acidic and alkaline media, reducing the required doses of 90% removal to at least 0.4-fold. It was imperative to study the toxicity levels of the oxidation by-products to provide directions for the potential applicability of this technology in water treatment. Toxicology Microtox® bioassay indicated a significant reduction in the toxicity of the degradation by-products and the detoxification was further enhanced by the addition of H2O2 and changing the pH to more acidic or alkaline conditions. These findings will contribute to the knowledge of the removal and detoxification of such challenging environmental contaminant and could be potentially applied to other biologically resistant compounds.

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Use of reversed-phase HPLC with solid-phase extraction for monitoring of radiolytic degradation of chlorophenols for environmental protection

Cited by 15 publications

References 24 publications

Photolytic degradation of polybromodiphenyl ethers under UV-lamp and solar irradiations

Photolytic degradation of polybromodiphenyl ethers under UV-lamp and solar irradiations

Radiation-Induced Degradation and the Effect of Scavengers on Benzene, Monochlorobenzene and 1,2-Dichlorobenzene in Aqueous Solutions

Degradation and detoxification of 2-chlorophenol aqueous solutions using ionizing gamma radiation

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