ABSTRACT The knowledge of pesticide residual concentrations in the environment is important to understand the threats to the environment and human health, especially when natural resources are used for human consumption. In this context, this study aimed to assess the potential ecological risk and respective sources of sediment contamination by organochlorine and organophosphorus pesticides. The study site was an urban lake located in Cascavel city, western Paraná state, Brazil, where the history of land use and occupation in the urban environment is typically agricultural. Surface sediment samples were collected every three months from April 2010 to June 2013 at five different collection points, totaling 65 samples. Analyses showed that contamination by organochlorine pesticides is related to agricultural activities in the past, with a low ecological risk to benthic organisms. Conversely, organophosphorus pesticides presented a recent and continuous contamination from urban activities, with a risk coefficient, especially for disulfoton, indicating a significant potential adverse effect on organisms. However, in general, the obtained results did not indicate an immediate risk to public health.

A tecnologia de pirolise e considerada promissora para conversao de biomassa celulosica. E esta revisao fornece uma visao geral de producao de bio-oleo a partir de pirolise e as possibilidades de empregabilidade comercial no Brasil. Retratando metodos de producao, modernizacao, alem da producao de insumos, como: o mercado madeireiro, a geracao de residuos agropecuarios e de residuos urbanos, que podem incrementar a producao energetica nacional, sem inferir na competicao por area e emissao de poluentes.

Pyrolysis is considered promising technology for converting cellulosic biomass. This review provides an overview of pyrolysis bio-oil and its commercial use opportunities in Brazil. Portraying production methods, modernization, as well as production supplies, such as the timber market, the generation of agricultural waste and municipal waste can build national energy production without interfering in the competition for area and emissions.

La pirolisis se considera tecnologia prometedora para la conversion de biomasa celulosica. Y esta revision proporciona una vision general de la bio-aceite de pirolisis y de empleo comercial oportunidades en Brasil. Retratando metodos de produccion, la modernizacion, asi como los insumos de produccion, como el mercado de la madera, la generacion de residuos agricolas y residuos municipales, que puede construir la produccion nacional de energia sin inferir en la competencia por el area y las emisiones.