Temporal and spatial trends of a floating islands system's efficiency.

Floating Treatment Systems (FTWs) are known to be an efficient means to treat eutrophic surface waters, but most of the studies are related to the use of FTWs at the laboratory, microcosm or mesocosm level. It is necessary to expand these studies to larger surface areas and to introduce new supporting materials, substrates and plants adapted to the different regional conditions. This study aimed to evaluate the efficiency of temporal and spatial remediation of a floating island system, set up in a 400m experimental area delimited in an urban reservoir located on the main campus of the Federal University of Campina Grande-PB, Brazil.

Risk assessment to health and human safety in an urban basin in northeastern Brazil.

The purpose of this work was to carry out a risk assessment of human health and safety associated with the dangers encountered in an urban basin located in Campina Grande, the State of Paraíba, northeastern Brazil, called the Prado Basin, through the method of failure mode and effects analysis (FMEA). As a subsidy to the study, laboratory analyses of drainage water were performed at eight points distributed along the Prado Canal, a canal of the study area, to verify its quality and subsequent influence on the population's health. It was verified that the risk of effluent discharge pollution stood out from the others, accounting for almost 50% of the total risk of the system.