Rachel Maynard Nieto

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Produções bibliográficas

• NIETO, R. M. ; DINIZ, L. ; Santos, A.P.F. ; Sodré, L.O.S. ; SOUZA, C. ; Andrade, D.F. ; DAVILA, L. A. . Ensaio Simples e Prático para a Identificação Semiquantitativa do Biodiesel em Diesel. 2010. (Apresentação de Trabalho/Seminário).

• NIETO, R. M. ; Silva, C.C.C.M. ; Coelho, M.A.Z. ; Aranda, D.A.G. ; Freitas, S.P. . Uso de Etanol para Extração e Transesterificação Enzimática do Óleo de Castanha do Brasil. 2008. (Apresentação de Trabalho/Congresso).

• NIETO, R. M. ; Couri, S. ; Freitas, S.P. . Características de Sorção e Difusão de Água no Extrato de Inulina de Chicória em Pó. 2008. (Apresentação de Trabalho/Congresso).

• NIETO, R. M. ; Silva, C.C.C.M. ; Aranda, D.A.G. ; Freitas, S.P. . Extração e Transesterificação do Óleo da Castanha do Brasil Usando Tecnologias Limpas. 2008. (Apresentação de Trabalho/Congresso).

• NIETO, R. M. ; Costa, C.R. ; Couri, S. ; Freitas, S.P. . Efeito da vida de prateleira nas características de sorção de água da inulina de chicória em pó. 2008. (Apresentação de Trabalho/Simpósio).

• NIETO, R. M. ; Silva, C.C.C.M. ; Coelho, M.A.Z. ; Aranda, D.A.G. ; Freitas, S.P. . Obtenção de Biodiesel através da Transesterificação Enzimática do Óleo da Castanha do Brasil. 2007. (Apresentação de Trabalho/Simpósio).

Outras produções

Projetos de pesquisa

• 2009 - 2010

  OPTIMIZATION OF ORGANIC MATTER EXTRACTION FROM SOIL INTO INORGANIC SOLUTION, Descrição: Abstract Dioxins are important environmental contaminants due to the high toxicity of some congeners. The difficulty of its degradation process leads to a great concern in the environmental community especially due to the possibility of human exposure to it. These contaminants were believed to be sorbed onto the soil matrix and consequently would not be spread through the soil decreasing the human exposure. However, dioxins can have a considerably mobility in soil due to the colloid-formation capacity of the organic matter containing sorbed hydrophobic organic contaminants (HOC). Thus, the extraction of contaminated organic matter is important in order to contribute to remediation of contaminated soils. This research aims to optimize the organic matter extraction from soil into an inorganic solution through analyzing of the colloid formation. In order to do that, the influence of four parameters, temperature, time, solution concentration and soil type were studied. The temperature and the time effect was described mainly by the DLVO theory and the concentration effect by Ryan and Elimelech (1996). The temperatures chosen to analyze the extraction were 50 C, 80 C and 100 C; the extraction times were 1.5 h and 3 h; the solution used was sodium hydroxide, 5 M and 16.7 M solutions. The soils were a sandy and an organic soil. Two analyses were performed in order to evaluate the extraction process, the measurement of turbidity in extract and measurement of loss on ignition (LOI) on remaining soil. The results showed that the sandy soil was more affected than the organic soil and that the extraction time was the least important on the extraction. Temperature and solution concentration were the most effective parameters, but not a combination of their extreme conditions. Therefore, the optimized extraction could be performed either at higher temperatures and median concentration or at median temperatures and higher concentrations.. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Rachel Maynard Nieto - Coordenador.

• 2009 - 2009

  Technologies for Soil or Ground Water Treatment Systems Verified in Other Than Full Scale, Descrição: The company Globe Water offers an only in situ-method included in this study. The method is designed for in situ treatment of contaminated groundwater. The principle is that a number of horizontal holes parallel to each other are bored in the land to be treated. Subsequently, holes are also bored in an opposite direction beneath the initial level, in order to completely cover the land being treated. A pipe with slits or perforations is then inserted in the bored holes. Appropriate sorbents, such as the bark that was tested, in containment booms joined by a wire, are drawn into the pipe, where they remain. The sorption takes place when soil- or ground water passes through the sorbent. When the strings of absorbents have been under ground for a period of time, sufficient to attain the desired sorption, the wire and the connected holders are removed from the bored hole and the used absorbents can be regenerated for use in the decontamination of other areas.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Rachel Maynard Nieto - Integrante / Johan Strandberg - Coordenador / Ann-Sofie Allard - Integrante / Gabriele Volkmer - Integrante / Mikael Malmaeus - Integrante., Financiador(es): União Européia - Auxílio financeiro.

• 2009 - 2009

  Full Scale Verification of Technologies for Soil or Ground Water Treatment Systems Technology Compost Degradation of Petrol Hydrocarbons, Descrição: Tratamento de hidrocarbonetos da gasolina no solo sendo um tratamento com uso de pilhas de solo, usando aeração e adição de bactérias e nutrientes. O princípio é o de aumentar a velocidade dos processos naturais, que já ocorrem no solo, por exemplo, a decomposição dos hidrocarbonetos como fonte de carbono para os microrganismos. Estes experimentos incluem a verificação de dois diferentes solos tratados em escala total.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Rachel Maynard Nieto - Integrante / Johan Strandberg - Coordenador / Ann-Sofie Allard - Integrante / Gabriele Volkmer - Integrante / Mikael Malmaeus - Integrante., Financiador(es): União Européia - Auxílio financeiro.

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