VANESSA HONDA OGIHARA

VANESSA HONDA OGIHARA

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Chemical pollutants in water and wastewater and related Eco toxicity: advanced developing technologies for organic degradation
2016 - BORRELY, SUELI I.; TEIXEIRA, ANTONIO C.S.C.; PIVELI, ROQUE P.; CAMPOS, FABIO; PEREIRA, MARIA da C.C.; OGIHARA, VANESSA H.; SILVA, MARCELA P.; LASTRE-ACOSTA, ARLEN M.; BATISTA, ANA P. dos S.
Environmental issues nowadays include the presence of contaminants in waters that are increasing in numbers and classes of chemicals. The environmental and human health will always depend on the protection of the air, waters, and soil. The industrial activities are as important as agriculture but a more clean production is imperative. The subject of this chapter is to discuss the xenobiotics contaminants in water and wastewaters and their related toxicity. A second issue is to show some data related to new possible technologies, under development, and their potency for decomposition of organic contaminants. Acute toxicity results evidenced the importance of this tool for assessing the impacts of toxins to living organisms and here they were used for the evaluation of proposed technologies for wastewater improvement. Three treatment technology options were presented (advanced oxidative processes, AOPs; photolysis by UV radiation, also including the Photo-Fenton processes and Ultra-sound; a special biomidia used as an additive effort to enhance biomass in order to treat landifill leachate in a sewage mixture). The last technique and Integrated Fixed-Film Activated Sludge (IFAS) was assessed for also for toxicity removals. Daphnia similis water flea and Vibrio fischeri bacteria were the target organisms for the evaluation of these processes. Acute effects removal > 20% was achieved for fluoxetine irradiated at 5kGy. ATZ acute effects were efficiently removed after 60 min of exposure to UV radiation and the combined IFAS processes were the most effective process for toxicity removal.
Degradation and acute toxicity removal of the antidepressant fluoxetine (Prozac) in aqueous systems by electron beam irradiation
2016 - SILVA, VANESSA H.O.; BATISTA, ANA P. dos S.; TEIXEIRA, ANTONIO C.S.C.; BORRELY, SUELI I.
Electron beam irradiation (EBI) has been considered an advanced technology for the treatment of water and wastewater, whereas very few previous investigations reported its use for removing pharmaceutical pollutants. In this study, the degradation of fluoxetine (FLX), an antidepressant marketed as Prozac(®), was investigated by using EBI at FLX initial concentration of 19.4 ± 0.2 mg L(-1). More than 90 % FLX degradation was achieved at 0.5 kGy, with FLX below the detection limit (0.012 mg L(-1)) at doses higher than 2.5 kGy. The elucidation of organic byproducts performed using direct injection mass spectrometry, along with the results of ion chromatography, indicated hydroxylation of FLX molecules with release of fluoride and nitrate anions. Nevertheless, about 80 % of the total organic carbon concentration remained even for 7.5 kGy or higher doses. The decreases in acute toxicity achieved 86.8 and 9.6 % for Daphnia similis and Vibrio fischeri after EBI exposure at 5 kGy, respectively. These results suggest that EBI could be an alternative to eliminate FLX and to decrease residual toxicity from wastewater generated in pharmaceutical formulation facilities, although further investigation is needed for correlating the FLX degradation mechanism with the toxicity results.
Organic farm does not improve neither soil, or water quality in rural watersheds from southeastern Brazil
2015 - SILVA, ALEXANDRE M. da; MANFRE, LUIZ A.; URBAN, RODRIGO C.; SILVA, VANESSA H.O.; MANZATTO, MARIANA P.; NORTON, LLOYD D.
This study was conducted in a rural region where there are conventional and organic farms, the agricultural production includes more than 20 million people, and the effect on environmental quality is still poorly known in terms of indicators. Our objectives were: (1) compare soils attributes to reference areas, (2) verifying if cultivated areas under different farm systems presented differences in the soils attributes, (3) evaluate the attributes of quality water of watersheds and comparing the results with limiting values established by environmental legislation, and (4) analyze the values considering three criterion: watersheds, climatic season, and region of the landscapes. The study was conducted in two rural watersheds that have similar biophysical features and located in the Ibiúna municipality, São Paulo State, Brazil. However, one watershed encompasses farms where landowners largely use conventional agricultural systems. In the other watershed approximately 25% of the farms there are using an organic farm system. In the two watersheds soil samples were collected in sites covered with natural forest and in sites with agriculture (one watershed being organic and other being conventional). The attributes analyzed were soil bulk density (BD), concentrations of Carbon (C) and Nitrogen (N), C:N ratio, C Management Index, and the abundance of 13C and 15N in the soil organic matter. Water attributes were analyzed onsite or in laboratory after analysis of samples. Analyses included: air and water temperature, pH, dissolved oxygen, salinity, total of dissolved solids, total solids, electric conductivity, turbidity, total chloride, nitrate, total phosphorus and potassium. Regarding the soil attributes our database revealed that (1) the soils from cultivated sites of both watersheds presented significant differences from their respective forested areas, (2) Soil attributes are of equal quality in both farm systems. Concerning water attributes: (1) almost all attributes presented values better than the limiting values stipulated by Brazilian legislation; (2) the watersheds did not present significant differences of most of the attributes; (3) in the criteria climatic season data showed some significant differences. The data showed that the soils from the areas used for agricultural ends present belief that significantly worse soil quality in comparison to soils from sites still covered with natural forest. Neither the land cover nor farming system are altering the superficial water quality of the studied watershed and this appears to be related to the extensive percentage of natural remaining vegetation that still exists in both watersheds. The seasonality is an important force that drives the quality characteristics of the water. We highlight that the principles of organic agriculture should be practiced more efficiently and influences such as deforestation should be rigorously avoided.
Photolysis of atrazine in aqueous solution: role of process variables and reactive oxygen species
2014 - SILVA, MARCELA P.; BATISTA, ANA P. dos S.; BORRELY, SUELI I.; SILVA, VANESSA H.O.; TEIXEIRA, ANTONIO C.S.C.
Radiation erffects on the fluoxetine hydrochloride toxicity in the presence of domestic sewage
2013 - SILVA, VANESSA H.O.; CAMPOS, FABIO; PIVELI, ROQUE P.; BORRELY, SUELI I.
Avaliação da toxicidade e da degradação do fármaco cloridrato de fluoxetina, em solução aquosa e em mistura com esgoto doméstico, empregando irradiação com feixe de elétrons
2014 - SILVA, VANESSA H.O.
A ampla utilização de medicamentos, a falta de gerenciamento na produção e no descarte desses produtos, bem como a dificuldade na remoção de resíduos de fármacos das águas residuais durante as fases do tratamento de efluentes tem causado a liberação destes micropoluentes nos recursos hídricos. O cloridrato de fluoxetina, conhecido comercialmente como Prozac®, tem sido muito utilizado em diversos países. Estudos demonstram sua presença no meio ambiente e o potencial de danos que este fármaco pode causar à biota. Desta forma, este trabalho estudou uma tecnologia de tratamento (POA - Processo Oxidativo Avançado) utilizando-se radiação ionizante, proveniente de um acelerador de elétrons, para a degradação do fármaco cloridrato de fluoxetina em solução aquosa e na mistura com esgoto doméstico. Após a irradiação foram feitas análises químicas na solução aquosa do fármaco com Espectrofotometria UV/VIS, Cromatografia Líquida Ultra Rápida (detectores UV/VIS e fluorescência) e quantificação do Carbono Orgânico Total (COT). Também foram empregados ensaios de toxicidade aguda (Daphnia similis e Vibrio fischeri) e crônica (Ceriodaphnia dubia). A eficiência na degradação do fármaco foi superior a 98,00% na menor dose de radiação (0,5 kGy), porém houve baixa taxa de mineralização para as doses aplicadas neste estudo. Para a Daphnia similis na dose de 0,5 kGy houve eficiência de 83,75% na redução da toxicidade do cloridrato de fluoxetina e 87,24% para 5,0 kGy, houve eficiência de 100,00% na redução da toxicidade para o esgoto doméstico e para a mistura (CF + esgoto) 79,32% na dose de 5,0 kGy. A eficiência para a Vibrio fischeri foi de 17,26% (melhor eficiência na dose de 5,0 kGy) e após a correção do pH das amostras a melhor eficiência foi para 20,0 kGy (26,78%), para o esgoto e para a mistura as eficiências ficaram em torno dos 20,00% para todas as doses de radiação aplicadas. Em relação a toxicidade crônica para Ceriodaphnia dubia a eficiência foi de 97,50% para 5,0 kGy. Verificou-se que a Ceriodaphnia dubia possui maior sensibilidade ao fármaco, seguido da bactéria Vibrio fischeri e por fim a Daphnia similis.