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Sixto Malato - One of the best experts on this subject based on the ideXlab platform.
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application of solar aops and ozonation for elimination of micropollutants in municipal wastewater treatment plant Effluents
Water Research, 2013Co-Authors: L Prietorodriguez, Nikolaus Klamerth, Ana Agüera, I Oller, Eva M Rodriguez, Sixto MalatoAbstract:Abstract Conventional municipal wastewater treatment plants are not able to entirely degrade some organic pollutants that end up in the environment. Within this group of contaminants, Emerging Contaminants are mostly unregulated compounds that may be candidates for future regulation. In this work, different advanced technologies: solar heterogeneous photocatalysis with TiO2, solar photo-Fenton and ozonation, are studied as tertiary treatments for the remediation of micropollutants present in real municipal wastewater treatment plants Effluents at pilot plant scale. Contaminants elimination was followed by Liquid Chromatography/Quadrupole ion trap Mass Spectrometry analysis after a pre-concentration 100:1 by automatic solid phase extraction. 66 target micropollutants were identified and quantified. 16 of those contaminants at initial concentrations over 1000 ng L−1, made up over 88% of the initial total Effluent pollutant load. The order of micropollutants elimination efficiency under the experimental conditions evaluated was solar photo-Fenton > ozonation > solar heterogeneous photocatalysis with TiO2. Toxicity analyses by Vibrio fischeri and respirometric tests showed no significant changes in the Effluent Toxicity after the three tertiary treatments application. Solar photo-Fenton and ozonation treatments were also compared from an economical point of view.
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application of solar aops and ozonation for elimination of micropollutants in municipal wastewater treatment plant Effluents
Water Research, 2013Co-Authors: L Prietorodriguez, Nikolaus Klamerth, Ana Agüera, I Oller, Eva Rodriguez, Sixto MalatoAbstract:Abstract Conventional municipal wastewater treatment plants are not able to entirely degrade some organic pollutants that end up in the environment. Within this group of contaminants, Emerging Contaminants are mostly unregulated compounds that may be candidates for future regulation. In this work, different advanced technologies: solar heterogeneous photocatalysis with TiO2, solar photo-Fenton and ozonation, are studied as tertiary treatments for the remediation of micropollutants present in real municipal wastewater treatment plants Effluents at pilot plant scale. Contaminants elimination was followed by Liquid Chromatography/Quadrupole ion trap Mass Spectrometry analysis after a pre-concentration 100:1 by automatic solid phase extraction. 66 target micropollutants were identified and quantified. 16 of those contaminants at initial concentrations over 1000 ng L−1, made up over 88% of the initial total Effluent pollutant load. The order of micropollutants elimination efficiency under the experimental conditions evaluated was solar photo-Fenton > ozonation > solar heterogeneous photocatalysis with TiO2. Toxicity analyses by Vibrio fischeri and respirometric tests showed no significant changes in the Effluent Toxicity after the three tertiary treatments application. Solar photo-Fenton and ozonation treatments were also compared from an economical point of view.
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comparison of several combined integrated biological aops setups for the treatment of municipal landfill leachate minimization of operating costs and Effluent Toxicity
Chemical Engineering Journal, 2011Co-Authors: D Cassano, Sixto Malato, I Oller, A Zapata, Gennaro Brunetti, G Del Moro, C Di Iaconi, Giuseppe MascoloAbstract:Abstract The treatment of medium-age landfill leachate was investigated by employing several set-ups including a sequencing batch biofilter granular reactor (SBBGR) step, with or without ozone enhancement, followed or not by a polishing stage with solar photo-Fenton (SphF). Objectives of the investigation were to compare different treatment strategies in order to achieve the lowest operating cost and to reduce the Toxicity of the final Effluent, evaluated by three different tests (respirometry, Vibrio fischeri and Lepidium sativum phytoToxicity). These objectives were addressed for two different target COD values, namely 160 and 500 mg/L, to be met in the final Effluent for disposing of to water bodies and to sewers, respectively, requested by Italian environmental regulation. The different treatment strategies have demonstrated to be technically suitable for achieving the requested COD (160 or 500 mg/L) and reduction of the initial Toxicity goals. For the COD target of 500 mg/L, the investigated treatment set-ups proposed in this paper showed to have comparable operating cost ( 3.2 € / m inf. 3 ). Instead, when the target COD is 160 mg/L, the combination SBBGR + SphF is economically more convenient ( 4.1 € / m inf. 3 ) being the operating cost of the other two investigated treatment set-ups (SBBGR/O3 and SBBGR/O3 + SphF) 5.7 and 4.8 € / m inf. 3 , respectively. As far as Toxicity reduction is concerned, for both the COD target of 500 and 160 mg/L, the SBBGR/O3 set-up gave better results than other investigated treatment options.
Zijian Wang - One of the best experts on this subject based on the ideXlab platform.
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acute and early life stage Toxicity of industrial Effluent on japanese medaka oryzias latipes
Science of The Total Environment, 2006Co-Authors: Jinmiao Zha, Zijian WangAbstract:To develop the whole Effluent Toxicity testing methods (WET), embryo larval stage Toxicity test using Japanese medaka (Oryzias latipes) was conducted to evaluate an Effluent from a banknote printing plant (BPP). The method is based on acute Toxicity using endpoint of 96-h larval morality and on chronic Toxicity using endpoints such as the time to hatch, hatching success, deformity, growth rate, swim-up failure, accumulative mortality and sexual ratio. In test for 96-h larval mortality, LC50 (the concentration was lethal to 50% of newly hatching medaka larvae) was 72.9%. In chronic Toxicity test, newly fertilized embryos (<5-h old) were exposed to 1%, 6.25%, 12.5%, 25%, 50% Effluent concentrations and to 200 mug/l BPA in a 24-h static renewal system at 25+/-1 degrees C until 15 day post-hatch. The results showed that all chronic endpoints were significantly different from the control at 50% dilution (p < 0.01). Embryos began to show lesions on 4th day at higher concentrations (12.5%, 25%, 50% BPP Effluent concentrations). Treatment group of 25% dilution showed delayed time to hatch. A reduction in body weight was observed at 25% dilutions for males and females, respectively. Deformities were observed in newly hatched larvae at 25% and 50% BPP Effluent concentrations. At 25% dilution, sex ratio of larvae was alternated and there was feminization phenomenon. We conclude that embryo larval stage test using medaka is feasible to evaluate both acute and chronic toxicities and potential endocrine disrupting activity of industrial Effluents.
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acute and early life stage Toxicity of industrial Effluent on japanese medaka oryzias latipes
Science of The Total Environment, 2006Co-Authors: Zijian WangAbstract:To develop the whole Effluent Toxicity testing methods (WET), embryo larval stage Toxicity test using Japanese medaka (Oryzias latipes) was conducted to evaluate an Effluent from a banknote printing plant (BPP). The method is based on acute Toxicity using endpoint of 96-h larval morality and on chronic Toxicity using endpoints such as the time to hatch, hatching success, deformity, growth rate, swim-up failure, accumulative mortality and sexual ratio. In test for 96-h larval mortality, LC50 (the concentration was lethal to 50% of newly hatching medaka larvae) was 72.9%. In chronic Toxicity test, newly fertilized embryos (<5-h old) were exposed to 1%, 6.25%, 12.5%, 25%, 50% Effluent concentrations and to 200 mu g/l BPA in a 24-h static renewal system at 25 +/- 1 degrees C until 15 day post-hatch. The results showed that all chronic endpoints were significantly different from the control at 50% dilution (p <0.01). Embryos began to show lesions on 4th day at higher concentrations (12.5%, 25%, 50% BPP Effluent concentrations). Treatment group of 25% dilution showed delayed time to hatch. A reduction in body weight was observed at 25% dilutions for males and females, respectively. Deformities were observed in newly hatched larvae at 25% and 50% BPP Effluent concentrations. At 25% dilution, sex ratio of larvae was alternated and there was feminization phenomenon. We conclude that embryo larval stage test using medaka is feasible to evaluate both acute and chronic toxicities and potential endocrine disrupting activity of industrial Effluents. (C) 2005 Elsevier B.V. All rights reserved.
Wim De Coen - One of the best experts on this subject based on the ideXlab platform.
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Effluent impact assessment using microarray based analysis in common carp a systems toxicology approach
Chemosphere, 2007Co-Authors: Luc Moens, Roel Smolders, Piet Van Remortel, Jurgen Delfavero, Wim De CoenAbstract:Abstract Effluents are a main source of direct and continuous input of pollutants to the aquatic environment, and can cause ecotoxicological effects at different levels of biological organization. Since gene expression responses represent the primary interaction site between environmental contaminants and biota, they provide essential clues to understand how chemical exposure can affect organismal health. The aim of the present study was to investigate the applicability of a microarray approach for unraveling modes of action of whole Effluent Toxicity and impact assessment. A chronic Toxicity test with common carp (Cyprinus carpio) was conducted where fish were exposed to a control and 100% Effluent for 21 days under flow-through conditions. Microarray analysis revealed that Effluent treatment mainly affected molecular pathways associated with the energy balance of the fish, including changes in carbohydrate and lipid metabolism, as well as digestive enzyme activity. These gene expression responses were in clear agreement with, and provided additional mechanistic information on various cellular and higher level effects observed for the same Effluent. Our results demonstrate the benefit of toxicogenomic tools in a “systems toxicology” approach, involving the integration of adverse effects of chemicals and stressors across multiple levels of biological complexity.
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Effluent impact assessment using microarray based analysis in common carp a systems toxicology approach
Chemosphere, 2007Co-Authors: Luc Moens, Roel Smolders, Piet Van Remortel, Jurgen Delfavero, Wim De CoenAbstract:Abstract Effluents are a main source of direct and continuous input of pollutants to the aquatic environment, and can cause ecotoxicological effects at different levels of biological organization. Since gene expression responses represent the primary interaction site between environmental contaminants and biota, they provide essential clues to understand how chemical exposure can affect organismal health. The aim of the present study was to investigate the applicability of a microarray approach for unraveling modes of action of whole Effluent Toxicity and impact assessment. A chronic Toxicity test with common carp (Cyprinus carpio) was conducted where fish were exposed to a control and 100% Effluent for 21 days under flow-through conditions. Microarray analysis revealed that Effluent treatment mainly affected molecular pathways associated with the energy balance of the fish, including changes in carbohydrate and lipid metabolism, as well as digestive enzyme activity. These gene expression responses were in clear agreement with, and provided additional mechanistic information on various cellular and higher level effects observed for the same Effluent. Our results demonstrate the benefit of toxicogenomic tools in a “systems toxicology” approach, involving the integration of adverse effects of chemicals and stressors across multiple levels of biological complexity.
Bryan W Brooks - One of the best experts on this subject based on the ideXlab platform.
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comparative analysis of Effluent water quality from a municipal treatment plant and two on site wastewater treatment systems
Chemosphere, 2013Co-Authors: Santos N Garcia, Rebekah L Clubbs, Jacob K Stanley, Brian Scheffe, Joe C Yelderman, Bryan W BrooksAbstract:Abstract Though decentralized on-site technologies are extensively employed for wastewater treatment around the globe, an understanding of Effluent water quality impairments associated with these systems remain less understood than Effluent discharges from centralized municipal wastewater treatment facilities. Using a unique experimental facility, a novel comparative analysis of Effluent water quality was performed from model decentralized aerobic (ATS) and septic (STS) on-site wastewater treatment systems and a centralized municipal wastewater treatment plant (MTP). The ATS and STS units did not benefit from further soil treatment. Each system received common influent wastewater from the Waco, Texas, USA Metropolitan Area Regional Sewerage System. We tested the hypothesis that MTP Effluent would exhibit higher water quality than on-site Effluents, based on parameters selected for study. A tiered testing approach was employed to assess the three Effluent discharges: select routine water quality parameters (Tier I), whole Effluent Toxicity (Tier II), and select endocrine-active compounds (Tier III). Contrary to our hypothesis, ATS Effluent was not statistically different from MTP Effluents, based on Tier I and III parameters, but reproductive responses of Daphnia magna were slightly more sensitive to ATS than MTP Effluents. STS Effluent water quality was identified as most degraded of the three wastewater treatment systems. Parameters used to assess centralized wastewater treatment plant Effluent water quality such as whole Effluent Toxicity and endocrine active substances appear useful for water quality assessments of decentralized discharges. Aerobic on-site wastewater treatment systems may represent more robust options than traditional septic systems for on-site wastewater treatment in watersheds with appreciable groundwater – surface water exchange.
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assessment of Toxicity reduction in wastewater Effluent flowing through a treatment wetland using pimephales promelas ceriodaphnia dubia and vibrio fischeri
Archives of Environmental Contamination and Toxicology, 2002Co-Authors: Jon M Hemming, Bryan W Brooks, Philip K Turner, William T Waller, T W La PointAbstract:Effluent Toxicity is regularly assessed with Ceriodaphnia dubia short-term chronic and Vibrio fischeri Toxicity tests. Condition factor and hemotocrit of fish have recently been used to assess fish health following exposure to xenoestrogens in complex municipal Effluents. To assess the ability of a treatment wetland to reduce or remove Toxicity of a municipal Effluent, we compared C. dubia and V. fischeri bioassays to Pimephales promelas responses in situ. Final whole Effluent was diverted to a constructed wetland and Effluent samples were taken daily from four sites, at incremental distances from the inflow, for a 3-week study. Overlapping 7-day C. dubia tests and V. fischeri assays were conducted with samples from each wetland site concurrent with a 3-week fish exposure. C. dubia survival and fecundity were significantly (< 0.0001) reduced at the inflow, but steadily improved with distance from the inflow. Fish condition and hematocrit were lower (α < 0.05) at wetland sites closer to the inflow than other wetland sites and laboratory controls. However, Effluent Toxicity was not detected by V. fischeri bioassays. Our findings indicate that 7-day C. dubia bioassays were most sensitive to Effluent Toxicity and suggest that other bioassays should be used concurrent with V. fischeri assays for municipal Effluent Toxicity testing.
I Oller - One of the best experts on this subject based on the ideXlab platform.
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application of solar aops and ozonation for elimination of micropollutants in municipal wastewater treatment plant Effluents
Water Research, 2013Co-Authors: L Prietorodriguez, Nikolaus Klamerth, Ana Agüera, I Oller, Eva M Rodriguez, Sixto MalatoAbstract:Abstract Conventional municipal wastewater treatment plants are not able to entirely degrade some organic pollutants that end up in the environment. Within this group of contaminants, Emerging Contaminants are mostly unregulated compounds that may be candidates for future regulation. In this work, different advanced technologies: solar heterogeneous photocatalysis with TiO2, solar photo-Fenton and ozonation, are studied as tertiary treatments for the remediation of micropollutants present in real municipal wastewater treatment plants Effluents at pilot plant scale. Contaminants elimination was followed by Liquid Chromatography/Quadrupole ion trap Mass Spectrometry analysis after a pre-concentration 100:1 by automatic solid phase extraction. 66 target micropollutants were identified and quantified. 16 of those contaminants at initial concentrations over 1000 ng L−1, made up over 88% of the initial total Effluent pollutant load. The order of micropollutants elimination efficiency under the experimental conditions evaluated was solar photo-Fenton > ozonation > solar heterogeneous photocatalysis with TiO2. Toxicity analyses by Vibrio fischeri and respirometric tests showed no significant changes in the Effluent Toxicity after the three tertiary treatments application. Solar photo-Fenton and ozonation treatments were also compared from an economical point of view.
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application of solar aops and ozonation for elimination of micropollutants in municipal wastewater treatment plant Effluents
Water Research, 2013Co-Authors: L Prietorodriguez, Nikolaus Klamerth, Ana Agüera, I Oller, Eva Rodriguez, Sixto MalatoAbstract:Abstract Conventional municipal wastewater treatment plants are not able to entirely degrade some organic pollutants that end up in the environment. Within this group of contaminants, Emerging Contaminants are mostly unregulated compounds that may be candidates for future regulation. In this work, different advanced technologies: solar heterogeneous photocatalysis with TiO2, solar photo-Fenton and ozonation, are studied as tertiary treatments for the remediation of micropollutants present in real municipal wastewater treatment plants Effluents at pilot plant scale. Contaminants elimination was followed by Liquid Chromatography/Quadrupole ion trap Mass Spectrometry analysis after a pre-concentration 100:1 by automatic solid phase extraction. 66 target micropollutants were identified and quantified. 16 of those contaminants at initial concentrations over 1000 ng L−1, made up over 88% of the initial total Effluent pollutant load. The order of micropollutants elimination efficiency under the experimental conditions evaluated was solar photo-Fenton > ozonation > solar heterogeneous photocatalysis with TiO2. Toxicity analyses by Vibrio fischeri and respirometric tests showed no significant changes in the Effluent Toxicity after the three tertiary treatments application. Solar photo-Fenton and ozonation treatments were also compared from an economical point of view.
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comparison of several combined integrated biological aops setups for the treatment of municipal landfill leachate minimization of operating costs and Effluent Toxicity
Chemical Engineering Journal, 2011Co-Authors: D Cassano, Sixto Malato, I Oller, A Zapata, Gennaro Brunetti, G Del Moro, C Di Iaconi, Giuseppe MascoloAbstract:Abstract The treatment of medium-age landfill leachate was investigated by employing several set-ups including a sequencing batch biofilter granular reactor (SBBGR) step, with or without ozone enhancement, followed or not by a polishing stage with solar photo-Fenton (SphF). Objectives of the investigation were to compare different treatment strategies in order to achieve the lowest operating cost and to reduce the Toxicity of the final Effluent, evaluated by three different tests (respirometry, Vibrio fischeri and Lepidium sativum phytoToxicity). These objectives were addressed for two different target COD values, namely 160 and 500 mg/L, to be met in the final Effluent for disposing of to water bodies and to sewers, respectively, requested by Italian environmental regulation. The different treatment strategies have demonstrated to be technically suitable for achieving the requested COD (160 or 500 mg/L) and reduction of the initial Toxicity goals. For the COD target of 500 mg/L, the investigated treatment set-ups proposed in this paper showed to have comparable operating cost ( 3.2 € / m inf. 3 ). Instead, when the target COD is 160 mg/L, the combination SBBGR + SphF is economically more convenient ( 4.1 € / m inf. 3 ) being the operating cost of the other two investigated treatment set-ups (SBBGR/O3 and SBBGR/O3 + SphF) 5.7 and 4.8 € / m inf. 3 , respectively. As far as Toxicity reduction is concerned, for both the COD target of 500 and 160 mg/L, the SBBGR/O3 set-up gave better results than other investigated treatment options.
