10 documents found, page 1 of 1

Tributyltin (TBT): a review on microbial resistance and degradation

Tributyltin (TBT) is one of the most toxic xenobiotics ubiquitous in the aquatic environment. Several reports have described the negative impact of TBT in living organisms, from bacteria to mammals. Over the world, TBT contamination has being described as a serious problem. Thus, it is imperative to decontaminate TBT polluted sites. Bioremediation strategies may constitute an alternative to conventional deconta...

A microcosm approach to evaluate the degradation of tributyltin (TBT) by Aeromo...

Tributyltin (TBT) is a biocide extremely toxic to a wide range of organisms, which has been used for decades in antifouling paints. Despite its global ban in 2008, TBT is still a problem of great concern due to the high levels trapped in sediments. Aeromonas molluscorum Av27 is a TBT degrading bacterium that was isolated from an estuarine system. We investigated the ability and the role of this bacterium on TBT...

A microcosm approach to evaluate the degradation of tributyltin (TBT) by Aeromo...

Tributyltin (TBT) is a biocide extremely toxic to a wide range of organisms, which has been used for decades in antifouling paints. Despite its global ban in 2008, TBT is still a problem of great concern due to the high levels trapped in sediments. Aeromonas molluscorum Av27 is a TBT degrading bacterium that was isolated from an estuarine system. We investigated the ability and the role of this bacterium on TBT...

Working in cold environments: case study with environmental and electrocardiogr...

Background - In low-temperature working environments, physiological reactions aimed at adjusting thermal balance occur, leading sometimes to cardiovascular overload. However, the cold is often a key factor in the production, processing, and packaging of products, especially in the food industry, which makes occupational exposure to a cold environment a reality. This study’s main aim is to study the work conditi...

Trabalho em ambientes refrigerados: estudo de caso com a realização de monitori...

Introdução - Em ambientes laborais de baixa temperatura ocorrem reacções fisiológicas destinadas a ajustar o equilíbrio térmico que podem conduzir a sobrecarga cardiovascular. Contudo, em várias áreas de actividade o frio é um factor essencial para a produção, o que torna a exposição ocupacional uma realidade incontornável. Este estudo teve como objectivo identificar alterações electrocardiográficas em trabalha...

Destoxificação de águas de cozedura da cortiça em reactor biológico

O sector corticeiro em portugal, maior produtor mundial de cortiça, enfrenta diversos problemas ambientais, nomeadamente a produção de águas residuais com eleveda carga poluente pelas empresas preparadoras tradicionais, na operação de cozedura da cortiça. As águas de cozedura da cortiça têm elevada carga orgânica, elevado teor de sólidos suspensos e baixo valor de pH. A sua toxicidade e baixa biodegradabilidade...

Sulphate-reducing bacteria from mining environments for metals bioremediation

Toxic heavy metals and metalloids constitute an international pollution problem that not only impacts public health but also is of environmental and economic importance. Several conventional treatment technologies for removing metals are available. These techniques, based on chemical methods of neutralisation and precipitation, even though quick and effective, present several disadvantages, such as the need for...

Metals recovery from mine lead concentrates:screening of bioleaching microbial ...

Selection of indigenous acidophilic bacteria for the bioleaching of two SOMINCO...

Functional screening of a metagenomic library obtained from soils water of S. D...