Advanced Oxidation of Commercial Textile Biocides in Aqueous Solution: Effects on Acute Toxicity and Biomass Inhibition

2005 ◽  
Vol 52 (10-11) ◽  
pp. 309-316 ◽  
Author(s):  
I. Arslan-Alaton ◽  
G. Eremektar ◽  
F. Germirli-Babuna ◽  
G. Insel ◽  
H. Selcuk ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Advanced Oxidation Processes ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Inhibitory Effect ◽  
Heterogeneous Photocatalysis ◽  
Dilution Ratio ◽  
Water Flea ◽  
Finishing Process ◽  
Textile Finishing

In the present study, the decomposition of two biocides used in the textile finishing process with Advanced Oxidation Processes (AOPs) has been studied. Different AOPs, i.e O3/OH−, TiO2/UV-A and Fe2+/H2O2 have been used representing mutually combined components of the chemically and photochemically driven advanced oxidation systems. The course of reaction was examined by changes in chemical oxygen demand (COD), total organic carbon (TOC) and acute toxicity towards the water flea Daphnia magna (assessed in terms of the effective dilution ratio LD50). Particular attention has been paid to determine the inhibitory effect of raw and ozonated biocides on biological activated sludge consortium at concentrations typically encountered in textile finishing effluents. Significant oxidation and mineralization of both biocides could be achieved employing ozonation at pH=11.5 and heterogeneous photocatalysis (TiO2/UV-A) at pH = 5.0, whereas Fenton's reagent appeared to be less effective in COD and acute toxicity abatement.

Degradation and changes in toxicity and biodegradability of tetracycline during ozone/ultraviolet-based advanced oxidation

2014 ◽  
Vol 70 (7) ◽  
pp. 1229-1235 ◽  
Author(s):  
Huyen Trang Luu ◽  
Kisay Lee
Keyword(s):  
Escherichia Coli ◽  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Vibrio Fischeri ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Uv Treatment ◽  
Experimental Conditions ◽  
Oxidation Processes ◽  
Complete Mineralization

Advanced oxidation processes (AOPs) composed of O3, H2O2 and ultraviolet (UV) were applied to degrade tetracycline (TC). Degradation efficiency was evaluated in terms of changes in absorbance (ABS) and total organic carbon (TOC). The change in biotoxicity was monitored with Escherichia coli and Vibrio fischeri. The improvement in biodegradability during oxidation was demonstrated through 5-day biochemical oxygen demand/chemical oxygen demand ratio and aerobic biological treatment. The combination of O3/H2O2/UV and O3/UV showed the best performance for the reductions in ABS and TOC. However, mineralization and detoxification were not perfect under the experimental conditions that were used in this study. Therefore, for the ultimate treatment of TC compounds, it is suggested that AOP treatment is followed by biological treatment, utilizing enhanced biodegradability. In this study, aerobic biological treatment by Pseudomonas putida was performed for O3/UV-treated TC. It was confirmed that O3/UV treatment improved TOC reduction and facilitated complete mineralization in biological treatment.

Evaluation of acute toxicity, cytotoxicity and genotoxicity of landfill leachate treated by biological lagoon and advanced oxidation processes

2017 ◽  
Vol 5 (6) ◽  
pp. 6188-6193 ◽  
Author(s):  
Cláudia Regina Klauck ◽  
Alexandre Giacobbo ◽  
Erlon Diego Lorenz de Oliveira ◽  
Luciano Basso da Silva ◽  
Marco Antônio Siqueira Rodrigues
Keyword(s):  
Acute Toxicity ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes

scholarly journals Comparison of advanced oxidation processes in the decomposition of diuron and monuron – efficiency, intermediates, electrical energy per order and the effect of various matrices

2018 ◽  
Vol 4 (9) ◽  
pp. 1345-1360 ◽  
Author(s):  
János Farkas ◽  
Máté Náfrádi ◽  
Tamás Hlogyik ◽  
Bartus Cora Pravda ◽  
Krisztina Schrantz ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Electrical Energy ◽  
Heterogeneous Photocatalysis ◽  
Uv Photolysis ◽  
Oxidation Processes ◽  
Electrical Energy Per Order

The efficiency of UV-photolysis, ozonation, their combination and heterogeneous photocatalysis was investigated and compared in various matrices.

scholarly journals Toxicology Aspects of the Decomposition of Diuron by advanced Oxidation Processes

2015 ◽  
Vol 43 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Tünde Alapi ◽  
Gergő Simon ◽  
Gábor Veréb ◽  
Krisztina Kovács ◽  
Eszter Arany ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Heterogeneous Photocatalysis ◽  
Point Of View ◽  
Transformation Rate ◽  
Uv Photolysis ◽  
Oxidation Processes ◽  
Ultraviolet Photolysis ◽  
Multicomponent Solutions ◽  
Residual Herbicide

Abstract Diuron is a phenylurea-based residual herbicide with toxic and endocrine disrupting effects. The aims of the present work were the comparison of the efficiency of various advanced oxidation processes, such as direct ultraviolet photolysis, ozonation, their combination, and heterogeneous photocatalysis from the point of view of the transformation rate of diuron, rate of mineralisation and dehalogenation, formation of aromatic intermediates, and ecotoxicological effects of the formed multicomponent solutions during the treatments. The initial rates of transformation of diuron are in the order of ozonation < heterogeneous photocatalysis < UV photolysis < combination of UV photolysis and ozonation. Each method provided similar tendencies in the decrease of the concentration of organically bound chlorines (AOX) since, until the diuron was completely degraded, the concentration of AOX decreased almost to zero in each case. However, only heterogeneous photocatalysis was found to be effective in terms of mineralisation. Ecotoxicological results showed that in each case, except for ozonation, the toxicity of the treated solutions changed through a maximum during the transformation of diuron. The maximum value was found to be lower in the case of heterogeneous photocatalysis. Thus, the formation and decomposition of by-products of relatively higher toxicity than diuron can be supposed. Our results confirmed that the amount of the formed (aromatic) intermediates, their quality and specific toxicity strongly depend on the applied processes.

scholarly journals Toxicity of coke wastewater treated with advanced oxidation by Fenton process supported by ultrasonic field

2016 ◽  
Vol 27 (1) ◽  
pp. 42-47 ◽  
Author(s):  
Anna Kwarciak-Kozłowska ◽  
Aleksandra Krzywicka
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Inhibitory Effect ◽  
Ultrasonic Field ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Coke Wastewater ◽  
Similar Inhibitory Effect ◽  
Algae Growth Inhibition Test

AbstractThe aim of the presented study was to determine the toxicity of wastewater from the production of coke. The wastewater was treated with advanced oxidation involving ultrasonic field with Fenton’s reagent (the amplitude was 61.5 μm and sonication time 8 min). Two doses of iron and four doses of hydrogen peroxide were used. The amount of hydrogen peroxide was proportional to the value of the chemical oxygen demand of raw wastewater, ranging from COD/H2O2 ratio of 1:2.5 to 1:20. Two tests were used to determine the toxicity (algae growth inhibition test and Lepidium test). It was found that more toxic to algae was wastewater treated by Fenton’s reagent containing a higher dose of iron. A similar inhibitory effect was observed on the germination of cress seeds.

Oxidative degradation of AOX and COD by different advanced oxidation processes: a comparative study with two samples of a pharmaceutical wastewater

1997 ◽  
Vol 35 (4) ◽  
pp. 257-264 ◽  
Author(s):  
Claus Höfl ◽  
Gerhard Sigl ◽  
Oliver Specht ◽  
Ilse Wurdack ◽  
Dietrich Wabner
Keyword(s):  
Advanced Oxidation Processes ◽  
Oxidative Degradation ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
The Other ◽  
Ozone Treatment ◽  
Pharmaceutical Wastewater ◽  
Oxidation Processes ◽  
Organic Halogen ◽  
Two Samples

Using two samples of a pharmaceutical wastewater, the efficiency of three advanced oxidation processes (AOPs) (H2O2/UV, O3/UV and H2O2/Fe(II)) for the removal of adsorbable organic halogen (AOX) and chemical oxygen demand (COD) were compared on a laboratory scale. The AOX contents of these samples ranged from 3 to 5 mg/L. Generally the results showed that all three methods are suitable for the degradation of AOX and COD. UV irradiation involved a high selectivity for the degradation of AOX compared to COD. On the other hand, processes based on hydroxyl radicals were less selective but considerably more effective in COD degradation. This explains why the combined methods H2O2/UV and O3/UV lead both to a complete destruction of AOX and a large removal of COD. During ozone treatment – without UV radiation – a decrease of AOX was also observed, although to a lower degree. Using Fenton's reagent both AOX and COD could be removed almost completely. The reaction time needed for this kind of treatment was very low compared to the other two AOPs. O3/UV treatment showed the largest consumption of “activated” oxygen (AO) during COD degradation. H2O2/Fe(II) treatment required almost the same amount of AO as H2O2/UV.

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