The presence of organic compounds, such as pharmaceuticals, hormones, pesticides, personal hygiene products, among other emerging contaminants in surface water and sediments, is one important research line related to water quality and environmental impact. Drugs are the bioactive molecules used in human and veterinary medicine and pesticides are used in …
No tratamento convencional de efluentes, a remoção de metais pesados demanda uma série de procedimentos que, alem de um custo dispendioso podem agregar toxicidade ao efluente. Muitas vezes, ainda que os níveis de metais pesados do efluente tratado se enquadrem nos parâmetros exigidos pela legislação, o efluente ainda pode apresentar …
The rivers that drain the metropolitan region of Porto Alegre show a strong degradation in water quality, particularly the Sinos River and the Gravataí River. According to IBGE (2013), these rivers are the 4th and 5th most polluted rivers in Brazil, respectively. Both of them are tributaries of Guaiba Lake. …
The water sources contamination by natural and anthropogenic substances puts in alert the capacity to maintain the balance of these ecosystems with the preservation of their functions, maintenance of aquatic life and the quality of noble uses, such as the abstraction of drinking water. In water, some compounds including genotoxic …
Danio rerio and Pimephales promelas are the most widely used fish species as test organisms in toxicity assays in Brazil. In the case of D. rerio, acute toxicity tests with chemicals and effluents have traditionally been conducted using juvenile/adult organisms or, more recently, embryos. For P. promelas, tests are preferably …
Among the Neotropical rivulids, annual fishes form a particularly interesting group. They inhabit ephemeral wetlands and temporary ponds that become completely dry during months of low rainfall. In order to survive in these extreme environments, they developed diapausing embryos that are resistant to the harsh conditions imposed by the drought …
