The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Damia Barcelo - One of the best experts on this subject based on the ideXlab platform.
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pharmaceuticals removal and microbial community assessment in a continuous fungal treatment of non sterile Real hospital Wastewater after a coagulation flocculation pretreatment
Water Research, 2017Co-Authors: Josep Anton Mirtutusaus, Sara Rodriguezmozaz, Damia Barcelo, Eloi Parlade, Marta Llorca, Marta Villagrasa, Maira Martinezalonso, Nuria Gaju, Gloria CaminalAbstract:Hospital Wastewaters are a main source of pharmaceutical active compounds, which are usually highly recalcitrant and can accumulate in surface and groundwater bodies. Fungal treatments can remove these contaminants prior to discharge, but Real Wastewater poses a problem to fungal survival due to bacterial competition. This study successfully treated Real non-spiked, non-sterile Wastewater in a continuous fungal fluidized bed bioreactor coupled to a coagulation-flocculation pretreatment for 56 days. A control bioreactor without the fungus was also operated and the results were compared. A denaturing gradient gel electrophoresis (DGGE) and sequencing approach was used to study the microbial community arisen in both reactors and as a result some bacterial degraders are proposed. The fungal operation successfully removed analgesics and anti-inflammatories, and even the most recalcitrant pharmaceutical families such as antibiotics and psychiatric drugs.
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removal of endocrine disrupting chemicals in Wastewater by enzymatic treatment with fungal laccases
Organic Process Research & Development, 2017Co-Authors: Dennis Becker, Sara Rodriguezmozaz, Damia Barcelo, Sara Insa, Rob Schoevaart, Matthias De Cazes, Mariepierre Belleville, Jose Sanchezmarcano, Andrea Misovic, Jorg OehlmannAbstract:In this study the enzymatic degradation of hormones and endocrine disrupting compounds (EDCs) was investigated in artificial mixtures and in Real Wastewater by fungal laccases (Trametes versicolor, Myceliophthora thermophila). Several studies have already reported the successful enzymatic degradation of EDCs. However, with regards to a large-scale application, the influence of some factors such as enzyme immobilization and costs are often lacking. Furthermore, the majority of studies investigated the removal of EDCs by chemical analysis only, while our main interest was to use bioassays to study the decrease in the endocrine activity. The removal of estrogenic, androgenic, and antiandrogenic activity was assessed by yeast-based reporter gene assays and the degradation of industrial chemicals by an additional chemical analysis. It was demonstrated that the degradation of hormones and EDCs by laccases is feasible even at very low enzyme concentrations (2.8 ABTS U/L). In the artificial mixtures the main remo...
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study of the effect of the bacterial and fungal communities present in Real Wastewater effluents on the performance of fungal treatments
Science of The Total Environment, 2017Co-Authors: Marina Badiafabregat, Daniel Lucas, Tero Tuomivirta, Hannu Fritze, Taina Pennanen, Sara Rodriguezmozaz, Damia Barcelo, Gloria Caminal, Teresa VicentAbstract:The use of the ligninolytic fungi Trametes versicolor for the degradation of micropollutants has been widely studied. However, few studies have addressed the treatment of Real Wastewater containing pharmaceutically active compounds (PhAC) under non-sterile conditions. The main drawback of performing such treatments is the difficulty for the inoculated fungus to successfully compete with the other microorganisms growing in the bioreactor. In the present study, several fungal treatments were performed under non-sterile conditions in continuous operational mode with two types of Real Wastewater effluent, namely, a reverse osmosis concentrate (ROC) from a Wastewater treatment plant and a veterinary hospital Wastewater (VHW). In all cases, the setup consisted of two parallel reactors: one inoculated with T. versicolor and one non-inoculated, which was used as the control. The main objective of this work was to correlate the operational conditions and traditional monitoring parameters, such as laccase activity, with PhAC removal and the composition of the microbial communities developed inside the bioreactors. For that purpose a variety of biochemical and molecular biology analyses were performed: phospholipid fatty acids analysis (PLFA), quantitative PCR (qPCR) and denaturing gradient gel electrophoresis (DGGE) followed by sequencing. The results show that many indigenous fungi (and not only bacteria, which were the focus of the majority of previously published research) can successfully compete with the inoculated fungi (i.e., Trichoderma asperellum overtook T. versicolor in the ROC treatment). We also showed that the Wastewater origin and the operational conditions had a stronger impact on the diversity of microbial communities developed in the bioreactors than the inoculation or not with T. versicolor.
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identification of some factors affecting pharmaceutical active compounds phacs removal in Real Wastewater case study of fungal treatment of reverse osmosis concentrate
Journal of Hazardous Materials, 2015Co-Authors: Marina Badiafabregat, Daniel Lucas, Sara Rodriguezmozaz, Damia Barcelo, Gloria Caminal, Meritxell Gros, Teresa VicentAbstract:Many technologies are being developed for the efficient removal of micropollutants from Wastewater and, among them, fungal degradation is one of the possible alternative biological treatments. In this article, some factors that might affect pharmaceutically active compounds (PhACs) removal in a fungal treatment of Real Wastewater were identified in batch bioreactor treating reverse osmosis concentrate (ROC) from urban Wastewater treatment plant (WWTP). We found that degradation of PhACs by Trametes versicolor was enhanced by addition of external nutrients (global removal of 44%). Moreover, our results point out that high aeration might be involved in the increase in the concentration of some PhACs. In fact, conjugation and deconjugation processes (among others) affect the removal assessment of emerging contaminants when working with Real concentrations in comparison to experiments with spiked samples. Moreover, factors that could affect the quantification of micropollutants at lab-scale experiments were studied.
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identification and structural characterization of biodegradation products of atenolol and glibenclamide by liquid chromatography coupled to hybrid quadrupole time of flight and quadrupole ion trap mass spectrometry
Journal of Chromatography A, 2008Co-Authors: Jelena Radjenovic, Damia Barcelo, Sandra Perez, Mira PetrovicAbstract:Abstract In this paper we report about the biodegradation of the β-blocker atenolol and the hypoglycaemic agent glibenclamide. The biodegradation tests were performed in batch reactors under aerobic conditions, using as inocculums sewage sludge from a conventional activated sludge treatment and a laboratory-scale membrane bioreactor. Pharmaceuticals were used as sole carbon sources, spiked at 50 ng/L and 10 mg/L concentrations. Quadrupole time-of-flight mass spectrometry coupled to ultra-high-pressure liquid chromatograph was used for the screening and the structural elucidation of biodegradation products. A microbial metabolite of atenolol with [M+H] + at 268 was detected in the positive electrospray ionization mode. This new compound was determined to be a product of microbial hydrolysis of the amide of the parent compound. Biodegradation of glibenclamide by activated sludge proceeded via bacterial hydroxylation of the cyclohexyl ring, which resulted in formation of metabolite with a protonated molecule, [M+H] + = 510. MS 3 experiments performed by hybrid quadrupole linear ion trap (QqLIT) mass spectrometry coupled to high-performance liquid chromatography enabled further structural elucidation of the identified metabolites. Moreover, the highly sensitive QqLIT instrument in the MRM mode enabled the detection of parent compounds and one of the microbial metabolites identified in Real Wastewater samples. The methodology used in this study permitted for the first time the identification and detection of biodegradation product of β-blocker atenolol in Real Wastewater samples.
Ravi Naidu - One of the best experts on this subject based on the ideXlab platform.
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tailored titanium dioxide photocatalysts for the degradation of organic dyes in Wastewater treatment a review
Applied Catalysis A-general, 2009Co-Authors: Venkata Subba Rao Kambala, M P Srinivasan, D Rajarathnam, Ravi NaiduAbstract:Organic dyes are one of the largest groups of pollutants released into Wastewaters from textile and other industrial processes. Because of potential toxicity of the dyes and their visibility in surface waters, removal and degradation of organic dyes have been a matter of considerable interest. A wide range of methods have been developed, amongst which the heterogeneous photocatalysis involving titanium dioxide (TiO2) appears to be the most promising technology. This paper presents a critical review of novel achievements in the modification of TiO2 photocatalytic systems aimed at: enhanced TiO2 photocatalytic efficiency; complete mineralization of organic dyes; efficient utilization of visible and/or solar light; stability and reproducibility of the modified TiO2; recycle and reuse in Real Wastewater treatment.
Gloria Caminal - One of the best experts on this subject based on the ideXlab platform.
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can white rot fungi be a Real Wastewater treatment alternative for organic micropollutants removal a review
Water Research, 2018Co-Authors: Josep Anton Mirtutusaus, Gloria Caminal, Rim Baccar, Montserrat SarraAbstract:Micropollutants are a diverse group of compounds that are detected at trace concentrations and may have a negative effect on the environment and/or human health. Most of them are unregulated contaminants, although they have raised a concern in the scientific and global community and future regulation might be written in the near future. Several approaches have been tested to remove micropollutants from Wastewater streams. In this manuscript, a focus is placed in reactor biological treatments that use white-rot fungi. A critical review of white-rot fungal-based technologies for micropollutant removal from Wastewater has been conducted, several capabilities and limitations of such approaches have been identified and a range of solutions to overcome most of the limitations have been reviewed and/or proposed. Overall, this review argues that white-rot fungal reactors could be an efficient technology to remove micropollutants from specific Wastewater streams.
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pharmaceuticals removal and microbial community assessment in a continuous fungal treatment of non sterile Real hospital Wastewater after a coagulation flocculation pretreatment
Water Research, 2017Co-Authors: Josep Anton Mirtutusaus, Sara Rodriguezmozaz, Damia Barcelo, Eloi Parlade, Marta Llorca, Marta Villagrasa, Maira Martinezalonso, Nuria Gaju, Gloria CaminalAbstract:Hospital Wastewaters are a main source of pharmaceutical active compounds, which are usually highly recalcitrant and can accumulate in surface and groundwater bodies. Fungal treatments can remove these contaminants prior to discharge, but Real Wastewater poses a problem to fungal survival due to bacterial competition. This study successfully treated Real non-spiked, non-sterile Wastewater in a continuous fungal fluidized bed bioreactor coupled to a coagulation-flocculation pretreatment for 56 days. A control bioreactor without the fungus was also operated and the results were compared. A denaturing gradient gel electrophoresis (DGGE) and sequencing approach was used to study the microbial community arisen in both reactors and as a result some bacterial degraders are proposed. The fungal operation successfully removed analgesics and anti-inflammatories, and even the most recalcitrant pharmaceutical families such as antibiotics and psychiatric drugs.
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study of the effect of the bacterial and fungal communities present in Real Wastewater effluents on the performance of fungal treatments
Science of The Total Environment, 2017Co-Authors: Marina Badiafabregat, Daniel Lucas, Tero Tuomivirta, Hannu Fritze, Taina Pennanen, Sara Rodriguezmozaz, Damia Barcelo, Gloria Caminal, Teresa VicentAbstract:The use of the ligninolytic fungi Trametes versicolor for the degradation of micropollutants has been widely studied. However, few studies have addressed the treatment of Real Wastewater containing pharmaceutically active compounds (PhAC) under non-sterile conditions. The main drawback of performing such treatments is the difficulty for the inoculated fungus to successfully compete with the other microorganisms growing in the bioreactor. In the present study, several fungal treatments were performed under non-sterile conditions in continuous operational mode with two types of Real Wastewater effluent, namely, a reverse osmosis concentrate (ROC) from a Wastewater treatment plant and a veterinary hospital Wastewater (VHW). In all cases, the setup consisted of two parallel reactors: one inoculated with T. versicolor and one non-inoculated, which was used as the control. The main objective of this work was to correlate the operational conditions and traditional monitoring parameters, such as laccase activity, with PhAC removal and the composition of the microbial communities developed inside the bioreactors. For that purpose a variety of biochemical and molecular biology analyses were performed: phospholipid fatty acids analysis (PLFA), quantitative PCR (qPCR) and denaturing gradient gel electrophoresis (DGGE) followed by sequencing. The results show that many indigenous fungi (and not only bacteria, which were the focus of the majority of previously published research) can successfully compete with the inoculated fungi (i.e., Trichoderma asperellum overtook T. versicolor in the ROC treatment). We also showed that the Wastewater origin and the operational conditions had a stronger impact on the diversity of microbial communities developed in the bioreactors than the inoculation or not with T. versicolor.
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identification of some factors affecting pharmaceutical active compounds phacs removal in Real Wastewater case study of fungal treatment of reverse osmosis concentrate
Journal of Hazardous Materials, 2015Co-Authors: Marina Badiafabregat, Daniel Lucas, Sara Rodriguezmozaz, Damia Barcelo, Gloria Caminal, Meritxell Gros, Teresa VicentAbstract:Many technologies are being developed for the efficient removal of micropollutants from Wastewater and, among them, fungal degradation is one of the possible alternative biological treatments. In this article, some factors that might affect pharmaceutically active compounds (PhACs) removal in a fungal treatment of Real Wastewater were identified in batch bioreactor treating reverse osmosis concentrate (ROC) from urban Wastewater treatment plant (WWTP). We found that degradation of PhACs by Trametes versicolor was enhanced by addition of external nutrients (global removal of 44%). Moreover, our results point out that high aeration might be involved in the increase in the concentration of some PhACs. In fact, conjugation and deconjugation processes (among others) affect the removal assessment of emerging contaminants when working with Real concentrations in comparison to experiments with spiked samples. Moreover, factors that could affect the quantification of micropollutants at lab-scale experiments were studied.
Josep Anton Mirtutusaus - One of the best experts on this subject based on the ideXlab platform.
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can white rot fungi be a Real Wastewater treatment alternative for organic micropollutants removal a review
Water Research, 2018Co-Authors: Josep Anton Mirtutusaus, Gloria Caminal, Rim Baccar, Montserrat SarraAbstract:Micropollutants are a diverse group of compounds that are detected at trace concentrations and may have a negative effect on the environment and/or human health. Most of them are unregulated contaminants, although they have raised a concern in the scientific and global community and future regulation might be written in the near future. Several approaches have been tested to remove micropollutants from Wastewater streams. In this manuscript, a focus is placed in reactor biological treatments that use white-rot fungi. A critical review of white-rot fungal-based technologies for micropollutant removal from Wastewater has been conducted, several capabilities and limitations of such approaches have been identified and a range of solutions to overcome most of the limitations have been reviewed and/or proposed. Overall, this review argues that white-rot fungal reactors could be an efficient technology to remove micropollutants from specific Wastewater streams.
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pharmaceuticals removal and microbial community assessment in a continuous fungal treatment of non sterile Real hospital Wastewater after a coagulation flocculation pretreatment
Water Research, 2017Co-Authors: Josep Anton Mirtutusaus, Sara Rodriguezmozaz, Damia Barcelo, Eloi Parlade, Marta Llorca, Marta Villagrasa, Maira Martinezalonso, Nuria Gaju, Gloria CaminalAbstract:Hospital Wastewaters are a main source of pharmaceutical active compounds, which are usually highly recalcitrant and can accumulate in surface and groundwater bodies. Fungal treatments can remove these contaminants prior to discharge, but Real Wastewater poses a problem to fungal survival due to bacterial competition. This study successfully treated Real non-spiked, non-sterile Wastewater in a continuous fungal fluidized bed bioreactor coupled to a coagulation-flocculation pretreatment for 56 days. A control bioreactor without the fungus was also operated and the results were compared. A denaturing gradient gel electrophoresis (DGGE) and sequencing approach was used to study the microbial community arisen in both reactors and as a result some bacterial degraders are proposed. The fungal operation successfully removed analgesics and anti-inflammatories, and even the most recalcitrant pharmaceutical families such as antibiotics and psychiatric drugs.
Venkata Subba Rao Kambala - One of the best experts on this subject based on the ideXlab platform.
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tailored titanium dioxide photocatalysts for the degradation of organic dyes in Wastewater treatment a review
Applied Catalysis A-general, 2009Co-Authors: Venkata Subba Rao Kambala, M P Srinivasan, D Rajarathnam, Ravi NaiduAbstract:Organic dyes are one of the largest groups of pollutants released into Wastewaters from textile and other industrial processes. Because of potential toxicity of the dyes and their visibility in surface waters, removal and degradation of organic dyes have been a matter of considerable interest. A wide range of methods have been developed, amongst which the heterogeneous photocatalysis involving titanium dioxide (TiO2) appears to be the most promising technology. This paper presents a critical review of novel achievements in the modification of TiO2 photocatalytic systems aimed at: enhanced TiO2 photocatalytic efficiency; complete mineralization of organic dyes; efficient utilization of visible and/or solar light; stability and reproducibility of the modified TiO2; recycle and reuse in Real Wastewater treatment.
