Techno-economical assessment of solar detoxification systems with compound parabolic collectors

Blanco, J.; Malato, S.; Milow, Barbara; Maldonado, M. I.; Fallmann, H.; Krutzler, T.; Bauer, R.

doi:10.1051/jp4:1999339

Cited by 7 publications

(3 citation statements)

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“…Combined chromatogram and GC/MS spectra results suggest no formation of byproducts during the oxidation process -a result that confirms research conducted by Haag et al [20], Blanco et al [21], and Barbusinski et al [12]. Data in the literature on the degradation of selected pesticides allow it to be assumed that no stable toxic intermediate products are formed in oxidation reactions with OH• radicals.…”

Section: Discussionsupporting

confidence: 85%

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Application of an ultrasonic field for the removal of selected pesticides

2018

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Abstract. The work detailed in this study investigated the efficiency of oxidizing technologie for the removal of organochlorine pesticides (OCPs) from aqueous solutions. OCPs constitute an important group of environmental pollutants also known to be endocrine-disrupting compounds (EDCs). The particular focus has been on a process achieving oxidation through the use of ultrasonic waves, with the impacts of pH, time on TOC and pesticide removal all being tested. Results confirm effective TOC decomposition using ultrasonic waves, albeit with reaction time showing a significant impact on results. Furthermore, results for TOC were not found to reflect those relating to the removal of individual substances from the tested mixture. Chromatographic analysis of reaction mixtures was therefore carried out after the selected processes had been applied, and an attempt to identify and characterize degradation products of the pesticides tested was also made. During the irradiation, the H 2 O 2 concentration arising was also monitored. The results indicate that H 2 O 2 is produced by cavitation during ultrasonic irradiation.

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Section: Discussionsupporting

confidence: 85%

“…In most cases, the goal of current technical applications of advanced oxidation processes is the destruction of pollutants in water, rather than the energy-intensive complete degradation of the content in the substrate. The most important economic parameter is thus the efficiency of substrate consumption [21][22][23][24][25][26][27].…”

Section: Discussionmentioning

confidence: 99%

Application of an ultrasonic field for the removal of selected pesticides

2018

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“…The reaction time for the organic compounds mineralization depends on many parameters, such as the Fe 2+ /H 2 O 2 concentration ratio, the chemical structure of testing compound, and pH, among others. The literature shows that this time could vary from 10 to o ver 120 min (Bandara et al, 1996;Blanco et al, 1999;Kitis et al, 1999). However, due to the short period of reaction allowed in this FIA settings (less than 2 minutes), the present oxidation efficiency was low.…”

Section: Fenton X Photo-fentonmentioning

confidence: 83%

Dissolved Organic Carbon Determination Using FIA and Photo-Fenton Reaction

Kondo

Arcos

Grassi

2002

Braz. arch. biol. technol.

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The FIA-photo-Fenton system is based on the flow oxidation of the organic matter. A small amount of the sample containing H2O2 is injected into the acidic flow solution of Fe2+, which passes through a tubular PTFE reactor irradiated with UV light. The generated CO2 is quantified by a conductometric detector and is directly proportional to the dissolved organic carbon concentration in the sample. The optimization studies were performed using EDTA solutions. The average recovery of organic carbon was 83% with a relative standard deviation of 3.7% using a 1:5 molar ratio of Fe2+:H2O2, pH 2.0, 100 muL of sample injection and a liquid flow of 1 mL min-1. After optimization, the DOC concentration was quantified using 13 different organic compounds, where the average recovery was 90%. The rate of the analysis was in average 50 samples hour-1.
O sistema FIA-foto-Fenton é baseado na oxidação em fluxo da matéria orgânica. Uma pequena quantidade de amostra contendo H2O2 é introduzida no fluxo de uma solução ácida de Fe2+, que passa por um reator tubular de PTFE irradiado com luz UV. O CO2 gerado é quantificado condutometricamente e é diretamente proporcional à concentração de carbono orgânico dissolvido na amostra. Os estudos de otimização foram realizados empregando soluções de EDTA. A recuperação média de carbono orgânico foi de 83% com desvio padrão relativo de 3,7% empregando 100 miL de amostra, pH 2,0, razão molar entre Fe2+ e H2O2 de 1:5 e uma vazão de 1 mL.min-1. Após otimização as concentrações de DOC foram quantificadas em 13 diferentes compostos orgânicos, com uma recuperação média de 90%. A velocidade de análise foi em média 50 amostras/h

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