Estudo do aproveitamento de resíduos PAE no desenvolvimento de materiais cerâmicos

This work presents a new ceramic material obtained through the incorporation of solid waste from the steel industry and known as dedusting powder PAE - in ceramic formulations based on clay, potassium and sodium feldspars, kaolin and talc. Formulations were prepared with ceramic residue levels of 0% (basic mass - MB), 2%, 4% and 8%, subjected to firing at temperatures of 1000 ° C, 1050ºC, 1100ºC and 1150ºC for periods of 15 min. and 120 min. The physicchemical and mechanical properties of these ceramic formulations were determined based on the firing temperature, residence time in the oven and the percentage of waste. Since the physicochemical and mechanical properties of the sintered materials were evaluated by chemical analysis techniques (fluorescence X-rays - FRX), particle size distribution, specific surface area, apparent density, structural analysis by diffraction of X-rays (DRX) and characterization of surface by scanning electron microscopy (SEM). The magnetic response characteristics and the pattern of magnetic ferrites of the samples were analyzed in the assay conditions, having noticed that the saturation magnetic susceptibility depend on the sintering temperature of the material and it is associated with its crystal structure. From the analysis results, it was concluded that the ceramic material with better physical and mechanical properties is obtained when the 8% from PAE residue is added to standard formulation under the burn time of 15 minutes and temperature of 1150ºC.

Produção de filtrantes ativados a partir de aproveitamento de resíduos: uma proposta para a proteção respiratória ocupacional

A Proteção Respiratória Ocupacional é atualmente uma exigência legal do Ministério do Trabalho e Emprego para garantia da saúde e segurança de milhares de trabalhadores que labutam com exposição habitual a substâncias nocivas que possam ocasionar doenças ocupacionais por inalação de ar contaminado no local de trabalho, cuja principal via de penetração no organismo humano é o Sistema Respiratório. Carvões ativados são materiais obtidos a partir de fontes carbonáceas e utilizados como elemento tecnológico filtrante nos equipamentos destinados a proteção respiratória individual. Fomentada por esse contexto, e visando potencializar conceitos de eco-eficiência e sustentabilidade em produção de materiais, este trabalho destina-se a produção de carvão ativado com potencial filtrante a partir de um rejeito agrícola abundante na região Nordeste do Brasil através de uma rota que favorece carbonização e ativação simultâneas, seguido de neutralização térmica. A biomassa precursora foi caracterizada por Ensaios padrões para determinação do teor de umidade e cinzas, Análise Química Elementar, Análises Térmicas (TG e DSC) e Distribuição Granulométrica por difração a laser. As amostras de carvões ativos sintetizadas foram caracterizadas por Difração de Raios X (DRX), Medidas de área específica por BET, Microscopia Eletrônica de Varredura (MEV), Análise assistida com ultravioleta visível e Redução à Temperatura Programada (TPR) por Amônia. A rota empregada favorece uma tecnologia alternativa para o aproveitamento de resíduos e aplicável para a Proteção Respiratória Ocupacional. A atmosfera de queima influencia diretamente na produção. A temperatura de carbonização variou conforme a estabilidade térmica da amostra. A cristalinidade, morfologia, teor mineralógico, área superficial específica e a adsorção em fase líquida e gasosa variaram em função da interação do resíduo precursor com o tipo e concentração de ácido utilizado. Os ensaios de adsorção demonstraram a efetividade da ativação segundo a rota experimental proposta. O potencial catalítico dos materiais produzidos para uso em máscaras respiratórias foi evidenciado pelo ensaio de TPR. O processo de produção estudado se mostrou eficaz para obtenção dos carvões promovendo processamentos e aplicações mais nobres para materiais cujo uso tem sido restrito a meras aplicações primárias ou descarte, mas cujo potencial tecnológico é amplo, empreendedor, sustentável, viável em escala industrial e de baixo custo.

Desenvolvimento de métodos para quantificação de benzilpenicilina em medicamentos veterinários e seus resíduos em leite bovino e caprino por UFLC-DAD

The Benzylpenicillin (PENG) have been as the active ingredient in veterinary medicinal products, to increase productivity, due to its therapeutic properties. However, one of unfortunate quality and used indiscriminately, resulting in residues in foods exposed to human consumption, especially in milk that is essential to the diet of children and the ageing. Thus, it is indispensable to develop new methods able to detect this waste food, at levels that are toxic to human health, in order to contribute to the food security of consumers and collaborate with regulatory agencies in an efficient inspection. In this work, were developed methods for the quality control of veterinary drugs based on Benzylpenicillin (PENG) that are used in livestock production. Additionally, were validated methodologies for identifying and quantifying the antibiotic residues in milk bovine and caprine. For this, the analytical control was performed two steps. At first, the groups of samples of medicinal products I, II, III, IV and V, individually, were characterized by medium infrared spectroscopy (4000 – 600 cm-1). Besides, 37 samples, distributed in these groups, were analyzed by spectroscopy in the ultraviolet and near infrared region (UV VIS NIR) and Ultra Fast Liquid Chromatograph coupled to linear arrangement photodiodes (UFLC-DAD). The results of the characterization indicated similarities, between PENG and reference standard samples, primarily in regions of 1818 to 1724 cm-1 of ν C=O that shows primary amides features of PENG. The method by UFLC-DAD presented R on 0.9991. LOD of 7.384 × 10-4 μg mL-1. LOQ of 2.049 × 10-3 μg mL-1. The analysis shows that 62.16% the samples presented purity ≥ 81.21%. The method by spectroscopy in the UV VIS NIR presented medium error ≤ 8 – 12% between the reference and experimental criteria, indicating is a secure choice for rapid determination of PENG. In the second stage, was acquiring a method for the extraction and isolation of PENG by the addition of buffer McIlvaine, used for precipitation of proteins total, at pH 4.0. The results showed excellent recovery values PENG, being close to 92.05% of samples of bovine milk (method 1). While samples of milk goats (method 2) the recovery of PENG were 95.83%. The methods for UFLC-DAD have been validated in accordance with the maximum residue limit (LMR) of 4 μg Kg-1 standardized by CAC/GL16. Validation of the method 1 indicated R by 0.9975. LOD of 7.246 × 10-4 μg mL-1. LOQ de 2.196 × 10-3 μg mL-1. The application of the method 1 showed that 12% the samples presented concentration of residues of PENG > LMR. The method 2 indicated R by 0.9995. LOD 8.251 × 10-4 μg mL-1. LOQ de 2.5270 × 10-3 μg mL-1. The application of the method showed that 15% of the samples were above the tolerable. The comparative analysis between the methods pointed better validation for LCP samples, because the reduction of the matrix effect, on this account the tcalculs < ttable, caused by the increase of recovery of the PENG. In this mode, all the operations developed to deliver simplicity, speed, selectivity, reduced analysis time and reagent use and toxic solvents, particularly if compared to the established methodologies.

Desenvolvimento de métodos para quantificação de benzilpenicilina em medicamentos veterinários e seus resíduos em leite bovino e caprino por UFLC-DAD

The Benzylpenicillin (PENG) have been as the active ingredient in veterinary medicinal products, to increase productivity, due to its therapeutic properties. However, one of unfortunate quality and used indiscriminately, resulting in residues in foods exposed to human consumption, especially in milk that is essential to the diet of children and the ageing. Thus, it is indispensable to develop new methods able to detect this waste food, at levels that are toxic to human health, in order to contribute to the food security of consumers and collaborate with regulatory agencies in an efficient inspection. In this work, were developed methods for the quality control of veterinary drugs based on Benzylpenicillin (PENG) that are used in livestock production. Additionally, were validated methodologies for identifying and quantifying the antibiotic residues in milk bovine and caprine. For this, the analytical control was performed two steps. At first, the groups of samples of medicinal products I, II, III, IV and V, individually, were characterized by medium infrared spectroscopy (4000 – 600 cm-1). Besides, 37 samples, distributed in these groups, were analyzed by spectroscopy in the ultraviolet and near infrared region (UV VIS NIR) and Ultra Fast Liquid Chromatograph coupled to linear arrangement photodiodes (UFLC-DAD). The results of the characterization indicated similarities, between PENG and reference standard samples, primarily in regions of 1818 to 1724 cm-1 of ν C=O that shows primary amides features of PENG. The method by UFLC-DAD presented R on 0.9991. LOD of 7.384 × 10-4 μg mL-1. LOQ of 2.049 × 10-3 μg mL-1. The analysis shows that 62.16% the samples presented purity ≥ 81.21%. The method by spectroscopy in the UV VIS NIR presented medium error ≤ 8 – 12% between the reference and experimental criteria, indicating is a secure choice for rapid determination of PENG. In the second stage, was acquiring a method for the extraction and isolation of PENG by the addition of buffer McIlvaine, used for precipitation of proteins total, at pH 4.0. The results showed excellent recovery values PENG, being close to 92.05% of samples of bovine milk (method 1). While samples of milk goats (method 2) the recovery of PENG were 95.83%. The methods for UFLC-DAD have been validated in accordance with the maximum residue limit (LMR) of 4 μg Kg-1 standardized by CAC/GL16. Validation of the method 1 indicated R by 0.9975. LOD of 7.246 × 10-4 μg mL-1. LOQ de 2.196 × 10-3 μg mL-1. The application of the method 1 showed that 12% the samples presented concentration of residues of PENG > LMR. The method 2 indicated R by 0.9995. LOD 8.251 × 10-4 μg mL-1. LOQ de 2.5270 × 10-3 μg mL-1. The application of the method showed that 15% of the samples were above the tolerable. The comparative analysis between the methods pointed better validation for LCP samples, because the reduction of the matrix effect, on this account the tcalculs < ttable, caused by the increase of recovery of the PENG. In this mode, all the operations developed to deliver simplicity, speed, selectivity, reduced analysis time and reagent use and toxic solvents, particularly if compared to the established methodologies.

Governança metropolitana e sustentabilidade: uma análise da gestão dos resíduos sólidos em Natal e Parnamirim

Nowadays the rapid growth of urban centers, the accumulation of social and environmental demands, the relationship between public policy and increasingly complex problems accentuates the feeling that cities undergo an urban crisis. This crisis is especially characterized by its multidimensionality, which goes through economic, cultural, ethical, environmental and, above all, political issues. In order to study the core of this crisis that is manifested by the urbanization process and has in its exacerbation on the metropolitan areas was conducted conceptual and theoretical study of the meaning of sustainable development applied to the everyday reality of cities, extracting from this debate concepts, such as: sustainable territorial development, administrative sustainability and political sustainability. Looking forward to test this the practical applicability of these theoretical concepts studied, an empirical study was done on the reality of metropolitan solid waste in Natal, Rio Grande do Norte, Brasil. According to the recent theoretical debate, the waste comprises a sector of the urban environmental crisis that best represents the relationship between man and environment. Ensuring the multidimensionality of environmental issues through the “Saber Ambietal” (LEFF, 2005), was made a extensive qualitative study correlating the concepts of sustainable territorial development, metropolitan governance and “Saber Ambiental” applied on solid waste. The results point to the real challenges of municipal government in understanding the real situation, take action and change the inertia in which have operated in recent decades. The results also showed the importance of transforming environmental issues in political, in other words, struggle for ideas, ideological and ethical references.

Governança metropolitana e sustentabilidade: uma análise da gestão dos resíduos sólidos em Natal e Parnamirim

Nowadays the rapid growth of urban centers, the accumulation of social and environmental demands, the relationship between public policy and increasingly complex problems accentuates the feeling that cities undergo an urban crisis. This crisis is especially characterized by its multidimensionality, which goes through economic, cultural, ethical, environmental and, above all, political issues. In order to study the core of this crisis that is manifested by the urbanization process and has in its exacerbation on the metropolitan areas was conducted conceptual and theoretical study of the meaning of sustainable development applied to the everyday reality of cities, extracting from this debate concepts, such as: sustainable territorial development, administrative sustainability and political sustainability. Looking forward to test this the practical applicability of these theoretical concepts studied, an empirical study was done on the reality of metropolitan solid waste in Natal, Rio Grande do Norte, Brasil. According to the recent theoretical debate, the waste comprises a sector of the urban environmental crisis that best represents the relationship between man and environment. Ensuring the multidimensionality of environmental issues through the “Saber Ambietal” (LEFF, 2005), was made a extensive qualitative study correlating the concepts of sustainable territorial development, metropolitan governance and “Saber Ambiental” applied on solid waste. The results point to the real challenges of municipal government in understanding the real situation, take action and change the inertia in which have operated in recent decades. The results also showed the importance of transforming environmental issues in political, in other words, struggle for ideas, ideological and ethical references.

Obtenção e caracterização de um compósito de matriz polimérica com carga de resíduos vegetal proveniente do sabugo de milho

The feasibility of using the corn cob to obtain a polymer matrix composite was studied. To obtain the bran, corncob passed the drying process in a solar dryer, and was subsequently triturated in forage and to obtain the different particle sizes, by sieving. Three different grain sizes were used: fine particles (FP) size between 0,10 and 2mm; sized particles (PM) with sizes between 2,10 and 3,35 mm; large particles (PG) sizes between 3,45 and 4,10 mm. Using 20% of residue relative to the resin, the test samples were constructed for characterization of the composite, taking into account thermal and mechanical parameters. The main advantage of the proposed composite is that it has a low density, below the relative resin, about 1.06 kg / m³ for the PG. The composite showed a mechanical behavior less than of the resin to the grain sizes and for all formulations studied. Showed better results for the bending, reaching 25.3 MPa for the PG. The composite also showed be feasible for thermal applications, with thermal conductivity less than 0.21 W / m, ranking as insulation. In terms of homogeneity of the mixture, the most viable grain size is the PF, which also showed improved aesthetics and better processability. This composite can be used to make structures that do not require significant mechanical strength, such as tables, chairs, planks, and solar and wind prototypes, such as ovens and cookers and turbines blades.

Obtenção e caracterização de um compósito de matriz polimérica com carga de resíduos vegetal proveniente do sabugo de milho

The feasibility of using the corn cob to obtain a polymer matrix composite was studied. To obtain the bran, corncob passed the drying process in a solar dryer, and was subsequently triturated in forage and to obtain the different particle sizes, by sieving. Three different grain sizes were used: fine particles (FP) size between 0,10 and 2mm; sized particles (PM) with sizes between 2,10 and 3,35 mm; large particles (PG) sizes between 3,45 and 4,10 mm. Using 20% of residue relative to the resin, the test samples were constructed for characterization of the composite, taking into account thermal and mechanical parameters. The main advantage of the proposed composite is that it has a low density, below the relative resin, about 1.06 kg / m³ for the PG. The composite showed a mechanical behavior less than of the resin to the grain sizes and for all formulations studied. Showed better results for the bending, reaching 25.3 MPa for the PG. The composite also showed be feasible for thermal applications, with thermal conductivity less than 0.21 W / m, ranking as insulation. In terms of homogeneity of the mixture, the most viable grain size is the PF, which also showed improved aesthetics and better processability. This composite can be used to make structures that do not require significant mechanical strength, such as tables, chairs, planks, and solar and wind prototypes, such as ovens and cookers and turbines blades.

Gestão e gerenciamento de resíduos sólidos: diretrizes jurídico-ambientais para a sustentabilidade

rates in the Brazilian cities, which time there is an inexistent theoretical reflection about public policy statement adding the way of Urban Solid Waste (USW) and tailing integrated management plans in the majorly Brazilian cities. The unappropriated solid waste disposal and final pollution result in a strong socioenvironmental problems and material extravagancies that should be used to recycling and reusing waste material, besides bringing immense challenges for the thematic Strategy Urban and Environmental Management it considers the Sustainable City Model. Moreover, this labor projects a discussion about USW problematic through legally and environmentally point of view, including the public environmental policy and the social technologies as resolution tactics. At that time, it reports rights, scientific articles, documents and Environmental Law Doctrine on findings thematic studies, also the propose displays an interdisciplinary research methodology which combines bibliographic method - focusing theory aspects of the legally environmentally guiding principle, public policy and social technologies. Those are theorist features very important to create a Municipal Integrated Solid Waste Management Plan (PMGIRS) - modus operandi of the Federal Law n. 12.305/2010 (National Solid Waste Policy - PNRS). That policy is interesting to receive financial resources from federal government (Cities Ministry; idem, Federal Decree n. 7.404/2010 and Federal Law n. 10.257/2001) helping the preservation of the environment, regional development, generation of jobs and income (art. 6º), in addition broadening spreading’s private companies dedicated to waste management. Consequently, the PNRS contains a set of guidelines and general procedures; it should be an operation of this legal policy contextualized by Social Technologies theory (TS) into social issues, legal, economic and environmental aspects. Therefore, this research notes the possibility of public policy statement implementation over and done with the PNRS by the terms of development and sustainability in the urban space.

A busca por uma política nacional dos biocombustíveis como tutela do direito fundamental ao meio ambiente : acautelamento e avaliação de riscos

The work is to demonstrate the scope of modern-day major regulatory provisions and the policies implemented to adoption of biofuels in the national energy matrix. The adoption of biofuels as an alternative to fossil fuels, is based on the realization of the fundamental right to an ecologically balanced environment mitigating hazards and environmental hazards arising from a postmodern society. However, the change in the Brazilian energy matrix observe the precepts of certain environmental principles to essentially environmental preservation The proposed Environmental rule of law is founded on the realization of the right (duty) key to an ecologically balanced environment for sustainable development. Thus, it is up to the State, in addition to considering the dangers and risks fruits of government decisions, present the possible instruments to mitigate the irreversible environmental damage to the environment. The management of environmental risks present in the ideals of an Environmental rule of law, plays an important role in the preservation and economic development, using, therefore, of acautelatórios legal instruments, such as environmental licensing and the ecological-economic zoning, measures adopted in the light of the principles of precaution and preservation. The adoption of research in the environmental field, improvement and development of environmental technology, building a system to observe ecological changes, imposition of environmental policy objectives to be achieved in the medium and long term and systematization of organizations plan a protection policy environmental, are essential measures to control possible environmental risks and damage guided by the aforementioned environmental principles. Thus, it will be used the inductive method of approach, starting from the analysis of the new perspective of Environmental rule of law and the implementation of biofuels in the context of a post-modern society, marked by uncertainty and the risk of damage, from the study of the principles of caution, maintaining and cautionary measures in mitigating the hazards and potential risks.

Articulação terriotiral e sustentabilidade: estudo sobre o gerenciamento de resíduos de serviços de saúde no ABC Paulista

Tese apresentada ao Programa de Pós-Graduação em Administração da Universidade Municipal de São Caetano do Sul para a obtenção do título de Doutor em Administração

Resíduos da indústria agro-alimentar como possíveis fontes de ácido ferúlico

A indústria agro-alimentar produz anualmente uma grande quantidade de subprodutos, ainda tratados como desperdício. A indústria cervejeira, em particular, está associada à produção de vários resíduos, entre os quais o bagaço de malte, também designado bagaço de cerveja ou dreche. Sendo produzida numa razão de 20 kg por cada 100 litros de cerveja, só na Ilha da Madeira a produção de dreche ultrapassa as 2000 toneladas/ano. O presente trabalho foi realizado com o intuito de estudar a utilização da dreche como material de partida para a extracção de ácido ferúlico, um ácido hidroxicinâmico com elevada bioactividade e aplicações. A caracterização físico-química da dreche permitiu determinar um teor de humidade de aproximadamente 70% e um teor de cinzas de cerca de 3,6%. A distribuição granulométrica da dreche seca, revelou que cerca de 70% das partículas que a constituem têm dimensão entre 1 e 0,25 mm. A extracção com acetona produziu um extracto contendo 5 compostos de natureza fenólica, determinados por LC-MS. A hidrólise alcalina – uma das técnicas que permitem a extracção de compostos como o ácido ferúlico a partir de matrizes lenhocelulósicas – foi estudada em amostras de dreche submetidas a tratamento prévio. O pré-tratamento com ácido diluído demonstrou ser eficiente na extracção do ácido ferúlico a partir da dreche. A extracção em autoclave mostrou ser eficiente na extracção do ácido ferúlico [0,28% (m/m)] e uma simplificação do procedimento posterior à reacção de hidrólise alcalina fez aumentar o rendimento de extracção em cerca de 84%, comparativamente ao procedimento habitual. As condições óptimas de hidrólise alcalina em tubos autopressurizados aconteceram a 120 ºC, por 1,5 horas, num rácio de 20 mL/g e NaOH (1,5%). O processo de purificação do ácido ferúlico extraído por adsorção numa resina sintética resultou em percentagens de adsorção de 90,83% e de dessorção em torno dos 68,70%.

Contaminação ambiental e exploração capitalista ao meio ambiente: os resíduos sólidos na sociedade global

O mundo atual passa por uma crise ambiental sem precedentes na história, o que resulta em conseqüências ambientais perceptíveis e preocupantes. Governos e organizações internacionais têm dado maior relevância à variável ambiental como um dos principais eixos de definição das políticas de crescimento/desenvolvimento econômico, como o intuito de adequar as demandas sociais aos limites naturais. Como consequências dessa forma perdulária de produção e consumo da sociedade global temos a contaminação ambiental ampliada e diversificada. O presente artigo discute a acumulação capitalista no setor dos resíduos sólidos, partindo da hipótese da impossibilidade de se diminuir a geração ampliada dos resíduos, sendo necessário que se crie estratégias de gestão e tratamento para os resíduos baseados na atividade da reciclagem dos materiais. A parte final expõe os paradigmas da questão dos resíduos sólidos na sociedade global.

Produção de CDR a partir de resíduos industriais: caso de estudo da Recivalongo

A produção de combustível derivado de resíduos (CDR) resultou de uma decisão política que permitiu a instalação em Portugal de um significativo conjunto de processos, cuja avaliação técnico-económica e ambiental pode já ser feita. Este trabalho faz uma avaliação técnica e ambiental da linha de produção de CDR da Recivalongo. A avaliação técnica consistiu na análise dos caudais de material que entraram na linha de produção, na quantidade de CDR produzido, contabilizando também os gastos de recursos da linha (energia e materiais auxiliares). A avaliação da qualidade de CDR produzido a partir do ensaio laboratorial representou também uma parte muito significativa do trabalho produzido. A avaliação ambiental foi efetuada com base na metodologia da Avaliação de Ciclo de Vida (ACV). Os resultados obtidos permitiram concluir que o processo da Recivalongo transforma 69% do material de entrada, recuperando 2% em metais ferrosos e rejeitando para aterro a restante fração de 29%. As análises efetuadas ao CDR mostraram que apresenta um PCI compreendido entre 17 e 20 MJ/kg; o teor em cloro está compreendido entre 0,2 e 0,8% Conclui-se que neste processo o parâmetro mais difícil de controlar é o teor em cloro no CDR, pois existe uma grande diversidade de resíduos com grandes quantidades de cloro na sua constituição e que por muitas vezes são difíceis de identificar e/ou separar na primeira fase do tratamento dos resíduos. Da análise ciclo de vida efetuada à produção de CDR pode-se afirmar que esta operação de gestão de resíduos apresenta uma mais-valia quando comparada com a deposição dos resíduos em aterro, não sendo a diferença entre destinos tão significativa quanto o esperado. Desta avaliação pode concluir-se que a instalação operou muito abaixo da sua capacidade, sendo esta considerada uma das melhores linhas de produção de CDR a nível nacional.