The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform
Fernando G. Silva - One of the best experts on this subject based on the ideXlab platform.
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toxicity assessment from electro coagulation treated textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Aparecido Nivaldo Modenes, Fernando Rodolfo Espinozaquinones, Fernando G. SilvaAbstract:Abstract In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System.
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Toxicity assessment from electro-coagulation treated-textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Fernando Rodolfo Espinoza-quiñones, Aparecido Nivaldo Modenes, Fernando G. SilvaAbstract:In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System. © 2009 Elsevier B.V. All rights reserved.
Soraya Moreno Palácio - One of the best experts on this subject based on the ideXlab platform.
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toxicity assessment from electro coagulation treated textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Aparecido Nivaldo Modenes, Fernando Rodolfo Espinozaquinones, Fernando G. SilvaAbstract:Abstract In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System.
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Toxicity assessment from electro-coagulation treated-textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Fernando Rodolfo Espinoza-quiñones, Aparecido Nivaldo Modenes, Fernando G. SilvaAbstract:In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System. © 2009 Elsevier B.V. All rights reserved.
Robin Smith - One of the best experts on this subject based on the ideXlab platform.
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Effluent Treatment System design
Chemical Engineering Science, 1997Co-Authors: Robin SmithAbstract:This paper addresses the design of distributed Effluent Treatment Systems. In the case of single contaminants, targets are first set for the minimum flowrates in a distributed Effluent Treatment System. Design methods then allow the targets to be achieved in practice. Previously published methods failed to address important features of the design for multiple Treatment processes. In the case of multiple contaminants the Treatment network is developed in a staged approach by repeated use of targets and design. Minimum flowrate is not guaranteed for multiple contaminants, but the designer is guided towards the best solutions. Overall, the paper presents improved methods for the design of distributed Effluent Treatment Systems and extends the concepts to retrofit cases.
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design of distributed Effluent Treatment Systems
Chemical Engineering Science, 1994Co-Authors: Yaping Wang, Robin SmithAbstract:Abstract The problem with centralised Effluent Treatment is that combining two waste streams that require different Treatment technologies leads to a cost of treating the combined streams which is virtually always more expensive than individual Treatment of the separate streams. On the other hand, if two waste streams require exactly the same Treatment it is sensible to combine them for Treatment to obtain economies of scale. The design of Effluent Treatment Systems should in the first instance segregate the streams for Treatment and only combine them if it is appropriate. If this policy is followed then the Effluent Treatment System becomes distributed rather than centralised. Distributed Effluent Treatment can, in the appropriate circumstances, lead to significantly lower capital and operating costs when compared with centralised Treatment. This paper presents a general methodology for the design of distributed Effluent Treatment Systems. The methodology first sets targets for Effluent flowrates through the Treatment processes for minimum Treatment costs. Simple design rules allow the development of a design to achieve the targets. The approach is general in that a centralised or distributed System could be obtained, whichever is appropriate.
Fernando Henrique Borba - One of the best experts on this subject based on the ideXlab platform.
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Toxicity assessment of tannery Effluent treated by an optimized photo-Fenton process.
Environmental technology, 2019Co-Authors: Fernando Henrique Borba, Diego Ricieri Manenti, Fernando Rodolfo Espinoza-quiñones, Aparecido Nivaldo Modenes, Rosângela Bergamasco, Nora Diaz MoraAbstract:In this work, an optimized photo-Fenton process was applied to remove pollutants from tannery industrial Effluent (TIE) with its final toxicity level being assessed by a lettuce-seed-based bioassay test. A full 33 factorial design was applied for the optimization of long-term photo-Fenton experiments. The oPtimum conditions of the photo-Fenton process were attained at concentration values of 0.3 g Fe(2+) L(-1) and 20 g H2O2 L(-1) and pH3, for 120 min UV irradiation time. Reactor operating parameter (ROP) effects on the removal of chemical oxygen demand, colour, turbidity, total suspended solids and total volatile solids were evaluated, suggesting that a broad range of ROP values are also suitable to give results very near to those of the photo-Fenton experiments under optimal conditions. Based on the low calculated median lethal dose (LD50) values from a lettuce-seed-based bioassay test, we suggest that recalcitrant substances are present in treated TIE samples. A possible cause of the high toxicity level could partly be attributed to the nitrate concentration, which was not completely abated by the photo-Fenton process. Apart from this, the photo-Fenton process can be used as a part of an industrial Effluent Treatment System in order to abate high organic pollutant loads.
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toxicity assessment from electro coagulation treated textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Aparecido Nivaldo Modenes, Fernando Rodolfo Espinozaquinones, Fernando G. SilvaAbstract:Abstract In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System.
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Toxicity assessment from electro-coagulation treated-textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Fernando Rodolfo Espinoza-quiñones, Aparecido Nivaldo Modenes, Fernando G. SilvaAbstract:In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System. © 2009 Elsevier B.V. All rights reserved.
Aparecido Nivaldo Modenes - One of the best experts on this subject based on the ideXlab platform.
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Toxicity assessment of tannery Effluent treated by an optimized photo-Fenton process.
Environmental technology, 2019Co-Authors: Fernando Henrique Borba, Diego Ricieri Manenti, Fernando Rodolfo Espinoza-quiñones, Aparecido Nivaldo Modenes, Rosângela Bergamasco, Nora Diaz MoraAbstract:In this work, an optimized photo-Fenton process was applied to remove pollutants from tannery industrial Effluent (TIE) with its final toxicity level being assessed by a lettuce-seed-based bioassay test. A full 33 factorial design was applied for the optimization of long-term photo-Fenton experiments. The oPtimum conditions of the photo-Fenton process were attained at concentration values of 0.3 g Fe(2+) L(-1) and 20 g H2O2 L(-1) and pH3, for 120 min UV irradiation time. Reactor operating parameter (ROP) effects on the removal of chemical oxygen demand, colour, turbidity, total suspended solids and total volatile solids were evaluated, suggesting that a broad range of ROP values are also suitable to give results very near to those of the photo-Fenton experiments under optimal conditions. Based on the low calculated median lethal dose (LD50) values from a lettuce-seed-based bioassay test, we suggest that recalcitrant substances are present in treated TIE samples. A possible cause of the high toxicity level could partly be attributed to the nitrate concentration, which was not completely abated by the photo-Fenton process. Apart from this, the photo-Fenton process can be used as a part of an industrial Effluent Treatment System in order to abate high organic pollutant loads.
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toxicity assessment from electro coagulation treated textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Aparecido Nivaldo Modenes, Fernando Rodolfo Espinozaquinones, Fernando G. SilvaAbstract:Abstract In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System.
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Potencial de biossorção do zinco pela macrófita egeria densa
Engenharia Sanitaria E Ambiental, 2009Co-Authors: Aparecido Nivaldo Modenes, Juliana Martins Teixeira De Abreu Pietrobelli, Fernando Rodolfo Espinoza Quiñones, Pedro Yahico Ramos Suzaki, Vanessa Lizeria Alflen, Márcia Regina Fagundes KlenAbstract:In this paper, the removal potential on Zn ion by macrophyte Egeria densa has been studied. The influence of the metal solution pH, the plant drying and the metal solution temperature, and biosorbent grain size was previously studied in batch Systems. Adsorption kinetic and equilibrium experiments of metals onto E. densa were performed under controlled temperature and permanent shaking. In adsorption kinetic tests for Zn (II) the equilibrium time was around 45 min. The biosorption kinetic data were well fitted by a pseudo-second order model. The equilibrium data at pH 5 were described a rather better by the Langmuir isotherm than the Freundlich one, with an adsorption rate and maximum metal content values of 0,829L g-1and 0,92 mequiv g-1, respectively, for Langmuir model. The macrophytes E. densa could be used as biosorbent material in industrial Effluent Treatment System.
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Toxicity assessment from electro-coagulation treated-textile dye wastewaters by bioassays
Journal of Hazardous Materials, 2009Co-Authors: Soraya Moreno Palácio, Cláudio C. Oliveira, Fernando Henrique Borba, Fernando Rodolfo Espinoza-quiñones, Aparecido Nivaldo Modenes, Fernando G. SilvaAbstract:In this study the pollutant removal from a textile dyeing wastewater has been investigated by using the electro-coagulation technique with iron electrodes. In order to obtain optimal values of the System state variables, a 33 full factorial experimental design was applied. The electro-coagulation (EC) process response was evaluated on the basis of COD removal and decolourisation values. The electrolysis time and density current were statistically significant for the COD removal and decolourisation. Based on the lettuce seeds (Lactuca sativa) and brine shrimp (Artemia salina), the lowest toxicity level was achieved in 5 min of electrolysis time. Due to the remaining high toxicity level above 30 min of electrolysis time, the EC process is not adequate to be used in a single Effluent Treatment, suggesting that this electrochemical process of up to 5 min could be used as part of a complete Effluent Treatment System. © 2009 Elsevier B.V. All rights reserved.
