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Stabilisation/solidification of APC residues from MSW incineration with hydraulic binders and chemical additives

Quina, Margarida J.; Bordado, João C. M.; Quinta-Ferreira, Rosa M.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.21%
This study focuses on the stabilisation/solidification (S/S) treatment of air pollution control (APC) residues from municipal solid waste (MSW) incineration. Six formulations (T1–T6) were tested based on different cements as binders, for the immobilisation of pollutants and to prevent their entering into the environment at unacceptable rates. Soluble phosphates and silicates were considered in some cases to fix heavy metals. The performance of T1–T6 products was measured in terms of initial and final setting times, mechanical strength, total availability and leaching from S/S products. Two monolithic leaching tests were used to estimate emissions of pollutants over 48 h and 64 days. The results showed that the setting time was reduced when soluble phosphates were used. Moreover, although all the treatments have met the threshold of 1 MPa for unconfined compressive strength, this parameter was significantly reduced due to matrix dissolution during immersion. After three cycles of leaching, the limit of 10% for solubilisation was exceeded for all treatments with the exception of T5 (with phosphates). This study demonstrated that the S/S treatment used at the industrial level can be improved with respect to toxic heavy metals, by using soluble silicates or phosphates...

Occupational airborne contamination in South Brazil: 2. Oxidative stress detected in the blood of workers of incineration of hospital residues

POSSAMAI, F. P.; AVILA JR., S.; BUDNI, P.; BACKES, P.; PARISOTTO, E. B.; RIZELIO, V. M.; TORRES, M. A.; COLEPICOLO, P.; WILHELM FILHO, D.
Fonte: SPRINGER Publicador: SPRINGER
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.58%
One of the most useful methods for elimination of solid residues of health services (SRHS) is incineration. However, it also provokes the emission of several hazardous air pollutants such as heavy metals, furans and dioxins, which produce reactive oxygen species and oxidative stress. The present study, which is parallel to an accompanied paper (Avila Jr. et al., this issue), investigated several enzymatic and non-enzymatic biomarkers of oxidative stress in the blood (contents of vitamin E, lipoperoxidation = TBARS, reduced glutathione = GSH, oxidized glutathione = GSSG, and activities of glutathione S-transferase = GST, glutathione reductase = GR, glutathione peroxidase = GPx, catalase = CAT and superoxide dismutase = SOD), in three different groups (n = 20 each) exposed to airborne contamination associated with incineration of SRHS: workers directly (ca. 100 m from the incinerator) and indirectly exposed (residents living ca. 5 km the incineration site), and controls (non-exposed subjects). TBARS and GSSG levels were increased whilst GSH, TG and alpha-tocopherol contents were decreased in workers and residents compared to controls. Increased GST and CAT activities and decreased GPx activities were detected in exposed subjects compared to controls...

Antioxidant therapy attenuates oxidative stress in the blood of subjects exposed to occupational airborne contamination from coal mining extraction and incineration of hospital residues

WILHELM FILHO, D.; AVILA JUNIOR, S.; POSSAMAI, F. P.; PARISOTTO, E. B.; MORATELLI, A. M.; GARLET, T. R.; INACIO, D. B.; TORRES, M. A.; COLEPICOLO, P.; DAL-PIZZOL, F.
Fonte: SPRINGER Publicador: SPRINGER
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.49%
Coal mining and incineration of solid residues of health services (SRHS) generate several contaminants that are delivered into the environment, such as heavy metals and dioxins. These xenobiotics can lead to oxidative stress overgeneration in organisms and cause different kinds of pathologies, including cancer. In the present study the concentrations of heavy metals such as lead, copper, iron, manganese and zinc in the urine, as well as several enzymatic and non-enzymatic biomarkers of oxidative stress in the blood (contents of lipoperoxidation = TBARS, protein carbonyls = PC, protein thiols = PT, alpha-tocopherol = AT, reduced glutathione = GSH, and the activities of glutathione S-transferase = GST, glutathione reductase = GR, glutathione peroxidase = GPx, catalase = CAT and superoxide dismutase = SOD), in the blood of six different groups (n = 20 each) of subjects exposed to airborne contamination related to coal mining as well as incineration of solid residues of health services (SRHS) after vitamin E (800 mg/day) and vitamin C (500 mg/day) supplementation during 6 months, which were compared to the situation before the antioxidant intervention (Avila et al., Ecotoxicology 18:1150-1157, 2009; Possamai et al., Ecotoxicology 18:1158-1164...

ESTUDO DE VIABILIDADE TÉCNICO-ECONÔMICA DE UMA USINA DE INCINERAÇÃO DE RESÍDUOS SÓLIDOS URBANOS NO ABCD; FEASIBILITY STUDY TECHNICAL-ECONOMIC AN INCINERATION PLANTS MUNICIPAL SOLID WASTE IN ABCD

Lima, Andre Xavier
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 22/12/1994 PT
Relevância na Pesquisa
27.49%
A incineração de resíduos sólidos urbanos tem sido cogitada como solução para problemas relacionados com a destinação final dos resíduos gerados em regiões metropolitanas. Este trabalho reve a situação dos resíduos sólidos na sub-região sudeste da Região Metropolitana de São Paulo e analisa a viabilidade de uma usina de incineração com geração de energia elétrica para tratamento dos resíduos sólidos coletados na região. E realizada uma revisão das tecnologias existentes e da emissão de poluentes atmosféricos, inclusive dioxinas e furanos , por incineradores de grande porte . Apesar de não ser atrativa financeiramente para as taxas de desconto usuais e as atuais taxas de tratamento e disposição final praticadas, a alternativa da incineração oferece diversas vantagens que devern ser analisadas em estudos comparativos aprofundados com as demais opções para a disposição de resíduos sólidos da Região Metropolitana de São Paulo.; MSW incineration has been considered a solution to the problems related to final disposal of waste generated in metropolitan regions. This work reviews the situation of MSW in the southeastern region of the Metropolitan Area of Sao Paulo and analyses the viability of an incineration plant with electric power generation for the treatement of MSW colected in that region. Existing technologies are reviewed alongside with the emission of atmospheric pollutants...

Modelagem matemática para a localização ótima de usinas de incineração com recuperação energética de resíduos sólidos domiciliaries: uma aplicação para Região Metropolitana da Baixada Santista e Litoral Norte; Mathematical modeling for the optimal location for incineration plants with energy recovery from municipal solid waste: an application to the Santos Metropolitan Region and North Coast

Heiderich, Nadja Nara Lima
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 27/01/2012 PT
Relevância na Pesquisa
37.38%
A presente pesquisa teve por objetivo propor uma estrutura de modelagem matemática para a localização ótima de unidades de tratamento térmico de resíduos com recuperação energética. Para tal, o ferramental utilizado foi o método de programação inteira mista, sendo a modelagem desenvolvida aplicada para a Região Metropolitana da Baixada Santista e Litoral Norte. Foi considerada como premissa básica que o processo de incineração seria operado pelo poder público; todos os municípios geradores de Resíduos Sólidos Domiciliares foram considerados como potenciais localidades para a instalação da unidade de tratamento térmico de resíduos; todos os aterros sanitários que atendiam os Municípios estudados foram considerados para a recepção das escórias e cinzas provenientes do processo de incineração. Foram especificados quatro cenários para tal análise, que abordaram competitividade em relação ao uso de aterros sanitários e a presença de eficiência na coleta seletiva dos Municípios. Os resultados apontaram para que a unidade de tratamento térmico de resíduos se localize no entorno dos Municípios de Santos, Praia Grande e São Vicente. Mesmo com a opção do uso de aterros sanitários, a implantação da unidade de tratamento térmico de resíduos se apresentou como uma alternativa mais favorável...

Uso de um lodo de cromo proveniente da indústria de curtume na fabricação de vidros sodo-cálcicos.; Use of tannery sludge containing chromium compounds in soda-lime glass fabrication.

Peralta, Marvin Marco Chambi
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 12/08/2014 PT
Relevância na Pesquisa
27.69%
A indústria de produção de couro gera uma grande quantidade de resíduos com características poluentes e de elevada periculosidade, entre os quais se destacam os resíduos curtidos (aparas, serragem e pó de couro curtido) e os lodos provenientes das estações de tratamento de efluentes (lodos de cromo, lodos primários e lodos secundários). Estes resíduos possuem uma considerável quantidade de compostos de Cr(III) na sua composição, os quais, sob condições oxidantes, podem transformar-se em Cr(VI), que é altamente tóxico para animais, plantas e seres humanos. No entanto, estes resíduos constituem uma potencial fonte alternativa de cromo (tradicional pigmento industrial) que poderia ser aproveitada pela indústria de vidros e de esmaltes. No presente trabalho foi realizado o estudo das propriedades físicas e químicas de um lodo de cromo proveniente do distrito industrial do município de Franca/SP, com o intuito de avaliar a viabilidade da utilização das cinzas da incineração deste resíduo como uma potencial fonte alternativa de cromo na fabricação de vidros sodo-cálcicos coloridos para embalagens. Fluorescência de Raios X (FRX), Difração de Raios X (DRX), análises termodiferencial (DTA) e termogravimétrica (TG/DTG)...

Increase on incineration capacity and NOx control for air enrichment in the experimental simulation of aqueous residue incineration

Lacava, P. T.; Pimenta, A. P.; Carvalho, J. A.; Ferreira, M. A.
Fonte: Taylor & Francis Ltd Publicador: Taylor & Francis Ltd
Tipo: Artigo de Revista Científica Formato: 1117-1152
ENG
Relevância na Pesquisa
37.69%
An experimental investigation of air enrichment in a combustion chamber designed to incinerate aqueous residues is presented. Diesel fuel and liquefied petroleum gas (LPG) were used independently as fuels. An increase of 85% in the incineration capacity was obtained with nearly 50% O-2 in the oxidant gas, in comparison to incineration with air only. The incineration capacity continues increasing for enrichment levels above 50% O-2 , although at a lower pace. For complete oxy-flame combustion (100% O-2 ), the increase of the incineration capacity was about 110% relative to the starting conditions and about 13.5% relative to the condition with 50% O-2 . The CO concentration measured near the flame front decreases drastically with the increase of O-2 content in the oxidant gas. At the chamber exit, the CO concentration was always near zero, indicating that the chamber residence time was sufficient to complete fuel oxidation in any test setting. For diesel fuel, the NOx was entirely formed in the first region of the combustion chamber. For diesel fuel, there was some increase in the NOx concentration up to 35% of O-2 ; this increase became very sharp after that. From 60 ppm, at operation with air only, the NOx concentration raises to 200 ppm at 35% O-2 ...

Influencia de la separación de residuos sólidos urbanos para reciclaje en el proceso de incineración con generación de energía

Poletto, José A.; Da Silva, Celso L.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 105-112
SPA
Relevância na Pesquisa
27.58%
This work analyses the recuperation of the energy of Municipal Solid Waste (MSW) through the incineration process. It considers the up to date tendency of segregation (separation) of plastic, paper and cardboard, glass and metals and their influence in the fluxes of mass and energy in the incineration system of MSW. For its development was used information related to the generation of MSW in Bauru city and the Combust software. The results so obtained allowed the estimation of the Caloric power of the typical MSW and also of this residue when one considers the separations of paper/cardboard and plastic for recycling.

Identificação multivariavel de um processo de incineração de residuos liquidos utilizando modelos nebulosos Takagi-Sugeno; Multivariable identification of liquid residue incineration process using Takagi-Sugeno fuzzy models

Felipe de Mello Almeida
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 26/08/2005 PT
Relevância na Pesquisa
37.64%
Este trabalho enfoca o problema de identificação multivariável de um processo de incineração de resíduos líquidos que faz parte do complexo da unidade de utilidades da empresa BASF S.A, localizada em Resende-RJ. Para trabalhos futuros, pretendemos utilizar esta identificação em um projeto de controlador inteligente. A escolha desse processo foi motivada pelo potencial de melhoria no sistema de controle da combustão, sendo realizado um estudo com as possíveis melhorias econômicas e operacionais com a otimização do processo de incineração. Os sistemas nebulosos foram enfocados de maneira especial, por causa da sua capacidade de processar informação de natureza incerta e qualitativa. O modelo nebuloso Takagi-Sugeno (TS) foi implementado para representar o processo de incineração de resíduos líquidos em estudo. Os resultados das simulações efetuadas com os modelos nebulosos TS obtidos representam de maneira adequada o comportamento real do sistema de incineração.; This work is concerned with the problem of multivariable identification of liquids residues incineration process that is a complex part of utilities unit in BASF SA. Company, located in Resende-RJ. For future works, we intend use this identification in an intelligent controller design. The choice of this process was motivated by the potential of improvement on combustion system control of the incineration process...

Energy recovery and impact on land use of Maltese municipal solid waste incineration

Pirotta, F. J. C.; Ferreira, E. C.; Bernardo, C. A.
Fonte: Elsevier; Pergamon Press Ltd. Publicador: Elsevier; Pergamon Press Ltd.
Tipo: Artigo de Revista Científica
Publicado em //2013 ENG
Relevância na Pesquisa
37.38%
An investigation of the potential of Maltese Municipal Solid Waste (MSW) for energy recovery is carried in this work together with a preliminary assessment of the corresponding economic and land use impacts. MSW composition data was collected to evaluate the waste combustion enthalpy. Data from 1997 to 2010 allowed the conclusion that an incinerator with a capacity of 32,500kg/h can treat all the waste expectably generated in Malta during next 20 years. The thermodynamics of the steam cycle combined with elemental analysis were applied to study the contribution for power (PG) and Combined Heat and Power (CHP) generation. The thermal energy was analyzed assuming its use in desalination. The best scenario considered corresponds to a potential electric power of 10 MW (PG) or to a maximum 4.8 million m3/year of desalinated water combined with and 7.25 MW (CHP). It was concluded that incineration and CHP have the greatest potential to maximize revenues, due to the optimal combination of heat production and electricity generation. Finally, a calculation of the savings in land use due to the MSW incineration implementation was performed. Those savings could represent from 13,500 to 17,000 m2 per year, a decisive benefit for Malta.

Environmental consequences of Maltese MSW incineration

Bernardo, C. A.; Pirotta, F. J. C.; Ferreira, E. C.
Fonte: IN-TECH Publicador: IN-TECH
Tipo: Conferência ou Objeto de Conferência
Publicado em //2013 ENG
Relevância na Pesquisa
37.21%
The intensity of Municipal Solid Waste (MSW) generation by human and economic activities causes environmental impacts, particularly critical in small insular countries, such as Malta. Thus, an investigation of the potential of Maltese MSW incineration with energy recovery was performed in this work focused on thermodynamic and land use aspects. The electricity potential of an MSW incinerator with associated electrical power plant to be built in Malta can be estimated as 5% of the total energy consumed in 2010 in the archipelago; alternatively, in a CHP configuration, it can also supply all the thermal energy required in 2010 for Multi-Effect Desalination. During its lifespan the plant can reduce deposition in landfills by at least 270,000 m2 (0.09% of the archipelago total area), diminishing also the potential for water and soil contamination. Last but not least, it can contribute to decrease the dependence on imported fossil fuels.

Análise do sistema de tratamento de efluentes gasosos de uma central de valorização energética de resíduos sólidos urbanos

Furtado, Samira Gomes
Fonte: Instituto Politécnico de Lisboa Publicador: Instituto Politécnico de Lisboa
Tipo: Dissertação de Mestrado
Publicado em /12/2014 POR
Relevância na Pesquisa
27.49%
O sistema de tratamento dos gases formados durante a combustão de Resíduos Sólidos Urbanos, (RSU), é um dos componentes mais importantes de uma instalação de incineração. O seu controlo e optimização asseguram a redução dos gases nocivos formados para valores que não representam quaisquer perigos para a saúde pública e ambiental, o que leva a incineração a ser considerada uma das técnicas mais seguras e eficientes para o tratamento dos RSU. A combinação desta técnica com produção de energia eléctrica, por recuperação de calor da combustão dos resíduos, tem contribuído gradualmente para o desenvolvimento socioeconómico. Este trabalho surgiu da necessidade de optimização do sistema de controlo dos gases ácidos, (HCl, NOx, SO2 e HF), da Central de Tratamento de Resíduos Sólidos Urbanos, (CTRSU), daEmpresa Valorsul e dos respectivos consumos dos reagentes utilizados no tratamento dos referidos gases, nomeadamente o leite de cal e a amónia. No entanto, procedeu-se apenas com uma análise detalhada do referido sistema de controlo, de modo a identificar as principais dificuldades e possíveis soluções teóricas para as mesmas. Os conhecimentos adquiridospoderão contribuir futuramente para a optimização do sistema de controlo em questão...

PARAMETRIC EVALUATION OF VOC CONVERSION VIA CATALYTIC INCINERATION

Fonte: Brazilian Society of Chemical Engineering Publicador: Brazilian Society of Chemical Engineering
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/1997 EN
Relevância na Pesquisa
37.38%
Abstract - A pilot-scale catalytic incineration system was used to investigate the effectiveness of catalytic incineration as a means of reducing volatile organic compound (VOC) air pollutants. The objectives of the study were: 1) to investigate the effects of operating and design variables on the reduction efficiency of VOCs; and 2) to evaluate reduction efficiencies for specific compounds in different chemical classes. The study results verified that the following factors affect the catalyst performance: inlet temperature, space velocity, compound type, and compound inlet concentration. Tests showed that reduction efficiencies exceeding 98% were possible, given sufficiently high inlet gas temperatures for the following classes of compounds: alcohols, acetates, ketones, hydrocarbons, and aromatics

A Critical Evaluation of Waste Incineration Plants in Wuhan (China) Based on Site Selection, Environmental Influence, Public Health and Public Participation

Hu, Hui; Li, Xiang; Nguyen, Anh Dung; Kavan, Philip
Fonte: MDPI Publicador: MDPI
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
27.64%
With the rapid development of the waste incineration industry in China, top priority has been given to the problem of pollution caused by waste incineration. This study is the first attempt to assess all the waste incineration plants in Wuhan, the only national key city in central China, in terms of environmental impact, site selection, public health and public participation. By using a multi-criterion assessment model for economic, social, public health and environmental effects, this study indicates these incineration plants are established without much consideration of the local residents’ health and environment. A location analysis is also applied and some influences of waste incineration plants are illustrated. This study further introduces a signaling game model to prove that public participation is a necessary condition for improving the environmental impact assessment and increasing total welfare of different interest groups in China. This study finally offers some corresponding recommendations for improving the environmental impact assessments of waste incineration projects.

Dental implant changes following incineration

Berketa, J.; James, H.; Marino, V.
Fonte: Elsevier Sci Ireland Ltd Publicador: Elsevier Sci Ireland Ltd
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
37.38%
Non-visual identification of victims utilizes DNA, fingerprint and dental comparison as primary scientific identifiers. In incidents where a victim has been incinerated, there may be loss of fingerprint detail and denaturing of DNA. Although extremely durable, tooth loss will also occur with extreme temperatures and the characteristics of recovered dental implants, if any, may be the only physical identifying data available. Currently, there are no experimental investigations to determine what changes occur to dental implants following high temperature exposure. A selection of dental implants was radiographed, utilizing purpose built apparatus to allow standard methodology. They were then heated in an INFI-TROL™ kiln to a maximum temperature of 1125 °C and the radiographic procedure repeated. Image subtraction evaluation of the radiographs was recorded using Adobe® Photoshop®. Both commercially pure titanium and titanium alloy dental implants survived the incineration and there was oxidation of the surface leading to minor alteration of the image. There was, however, no detectable sagging of the implants. The results of this research suggest that dental implants are still recognizable following incineration. In scenarios commonly seen by forensic odontologists...

Nitrous Oxide Emissions from Waste Incineration

SVOBODA Karel; BAXTER DAVID; MARTINEC Jiri
Fonte: SLOVAK ACADEMIC PRESS LTD Publicador: SLOVAK ACADEMIC PRESS LTD
Tipo: Articles in Journals Formato: Printed
ENG
Relevância na Pesquisa
27.49%
EU energy and environmental policy in waste management leads to increasing interest in developing methods for waste disposal with minimum emissions of greenhouse gases and minimum environmental impacts. From the point of view of nitrous oxide (N2O) emissions, waste incineration and waste cocombustion is very acceptable method of waste disposal. Two factors are important for attaining very low N2O emissions from waste incineration, particularly for waste with higher nitrogen content (e.g. sewage sludge, leather, etc.): temperature of incineration over 900◦C and avoiding selective noncatalytic reduction (SNCR) de-NOx method based on urea. For reduction of N2O emissions retrofitting such plants to ammonia-based SNCR is recommendable. The modern selective catalytic reduction facilities for de-NOx at waste incineration plants are only negligible source of N2O.; JRC.F.2-Cleaner energies

Management of solid residues from a waste to energy plant: A life cycle approach

Massoli Taddei, Maria Beatrice
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Dissertação de Mestrado
ENG
Relevância na Pesquisa
27.49%
ABSTRACT: One of the main environmental issues facing society is the increasing production of waste and its treatment with minimal adverse effects on the environment. Since 1995, the generation of municipal solid waste (MSW) in the European Union (EU-27) has shown a steady increase until 2002. In 2003 and 2004 this growth was interrupted, which can be attributed to the changes in the methodology and classifications that took place in many countries in this period. This reduction was followed by an increase from 2004 to 2007, and by a new declination from 2008 to 2012. This diminish could be associated at least in part, to the downturn in economic activity as a result of the financial and economic crisis. In this general overview, MSW management has a fundamental role, and over the last years progresses in waste management practices were conducted. Nowadays the current waste management policies, propose waste prevention and waste reuse as fundamental principles. If primary measures are not possible to reduce waste generation, recycling, energy recovery and disposal must be adopted. Among all of them, incineration of waste has become an attractive option, due to its several benefits. This technique allows volume and mass reduction of waste and recovery of energy bound in MSW. Nevertheless...

Life cycle model of waste to energy technologies in Spain and Portugal; Modelo de ciclo de vida de tecnologías para la valorización energética de residuos municipales en España y Portugal

Margallo Blanco, María
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Tese de Doutorado
ENG
Relevância na Pesquisa
27.49%
ABSTRACT : The high rate of waste generation in the society today has brought waste management to be a priority in European Policies. The European environmental Regulation established waste prevention, reuse, recycling, and finally waste incineration and landfilling as fundamental principles. Despite landfilling remaining the most common practice, waste incineration and recycling have increased in recent years. In particular, waste incineration allows the reduction in waste mass and volume, and the energy recovery. However, incineration has gained a bad reputation because of its environmental impacts, specifically due to the emission of greenhouse gases, acid gases, and dioxins and furans. The aim of this PhD Thesis is to analyse, waste to energy (WTE) technologies in the Iberian Peninsula from a life cycle approach. This analysis was carried out by means of a set of environmental sustainability metrics based on the consumption of natural resources and the generation of environmental burdens.; RESUMEN: La gran cantidad de residuos generados en la sociedad actual ha situado la gestión de residuos como una prioridad de las políticas europeas las cuales, proponen la siguiente jerarquía de gestión de residuos: prevención, reutilización...

Maximizing postmortem oral-facial data to assist identification following severe incineration

Berketa, J.W.
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
37.38%
PURPOSE: This paper reviews the literature for methods of maximizing the postmortem oral-facial information available for a comparison to be made for identification following an incident resulting in incineration. METHOD: A search was initially instigated utilizing PubMed, Scopus, and Google Scholar, with further library searches and correspondences among peers around the world leading to a comprehensive review of the literature. CONCLUSION: Maximizing postmortem dental evidence in a severe incineration event requires correct recognition and recording of dental data. Odontologists should attend the scene to facilitate this recognition. The information should be documented, photographed, and stabilized before retrieval. Wrapping, padding, and further support of the remains during transportation to the examination mortuary will aid this process. Examination at the mortuary requires further photography, complete charting, and radiographic examination of any dental material available, as well as awareness of other possible medical evidence, to enable identification of the human remains.; John W. Berketa; Review

Comparison of advanced techniques for the treatment of an indigo model solution: Electro incineration, chemical coagulation and enzymatic

Solís-Oba,M.; Eloy-Juárez,M.; Teutli,M.; Nava,J. L.; González,I.
Fonte: UAM, Unidad Iztapalapa, División de Ciencias Básicas e Ingeniería Publicador: UAM, Unidad Iztapalapa, División de Ciencias Básicas e Ingeniería
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2009 EN
Relevância na Pesquisa
37.38%
Indigo blue is one of the most important textile dyes. The wastewaters for indigo blue used are thought to be contaminated because; indigo can be oxidized to isatin, which is hydrolyzed to antranilic acid, a compound that is toxic to aquatic life. Indigo oxidation was evaluated using a model solution that simulated a textile wastewater. Three oxidation systems: electro incineration, chemical coagulation using Al2 (SO4)3, and enzymatic degradation with laccase. With electro incineration, the indigo solution was completely discolored; chemical oxidation demand diminution was 98% in approximately 3 hours and indigo blue was mineralized with no sludge production. Chemical coagulation with 40 mg L-1 sulfate aluminum removed some color though control of pH was necessary. At pH 5, the chemical oxygen demand was reduced by 76%, with sludge formation. Laccase enzyme, processing required 72 hours for complete discoloration of the indigo model solution; chemical oxidation demand diminution was nearby 50%, but laccase could not mineralize the dye. Toxicity assays indicated that the processes generated more toxic products than the control.