4 documents found, page 1 of 1
Sorption and desorption of chromium from applied tannery sludge in soils under ...
Ratke,Rafael Felippe; Lemke-de-Castro,Mara L.; De-Campos,Alfredo B.; Rocha,Cleonice; Barbosa,Juliano M.; Verginassi,Adriana; Zuffo,Alan M.Tannery sludge is often used in agriculture as a source of nutrients and for controlling soil acidity. However, the use of this substance can promote soil contamination by chromium. The objectives of this research were to determine the sorption and desorption isotherms of chromium from tannery sludge in a laboratory experiment. The sorption and desorption of chromium were determined in samples of an Oxisol unde...
Growth of Brachiaria decumbens in Latosol contaminated with copper
Silva,Ilmo Correia; Rocha,Cleonice; Rocha,Mariella Camargo; Sousa,Cleiton MateusABSTRACT Brachiaria decumbens presents high rusticity, rapid growth, as well as easy implantation and management. The aim of the study is to evaluate the growth of brachiaria in soil contaminated with copper. An experiment following a 3 x 4 factorial design was carried. It comprised three plant ages (30, 45 and 60 days after transplanting) and four copper concentrations (0, 20, 40 and 80 mg of Cu per kg of soil...
Caracterização da mineração aurífera em Faina, Goiás, em um contexto ambiental ...
Silva,Marcos Pedro da; Rocha,CleoniceFaz-se, por meio de uma abordagem ambiental histórico-dialética, a caracterização dos processos auríferos desenvolvidos no município de Faina, Goiás. São analisadas três atividades: mineração escrava, mineração de dragagem e mineração industrial. Evidenciou-se que a exploração por dragagem tem um maior poder impactante. Sobretudo, a mineração aurífera em Faina contribuiu para a história ambiental local e para o...
Larvicidal activity of oil-resin fractions from the Brazilian medicinal plant C...
Silva,Heloísa Helena Garcia da; Geris,Regina; Rodrigues Filho,Edson; Rocha,Cleonice; Silva,Ionizete Garcia daOil-resin fractions from Copaifera reticulata Ducke (Leguminosae-Caesalpinoideae) were evaluated for larvicidal activity on third larval instars of Aedes aegypti, in searching for alternative control methods for this mosquito. The bioactive fractions were chemically monitored by thin-layer chromatography, ¹H and 13C nuclear magnetic resonance and mass spectrometry. Bioassays were performed using five repetition...