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Title: Biotite (Black Mica) as an Adsorbent of Pesticides in Aqueous Solution
Authors: Ceolin, Leonardo Paulino Werneck
Aguiar Junior, Terencio Rebello
Morais, Maria Manuela
Rosado, Joana
Veloso, Ana Denise
Paulino, Berenice Ferreira
Martins, Lucas Luscher
Editors: Springer, International Publishing Switzerland 2015
Keywords: Pesticides
Water quality
Issue Date: Aug-2015
Publisher: Springer
Citation: Ceolin L. P. W.; Aguiar T. R. J.; Morais M. M.; Rosado J.; Veloso A. D.; Paulino B. F. & Martins L. L., 2015 Biotite (Black Mica) as an Adsorbent of Pesticides in Aqueous Solution. Water Air Soil Pollut (2015) 226: 231
Abstract: Chemical contamination of water resources on the planet generates a range of environmental disturbances which impair ecosystems. Humans ingest such chemicals often present in water. Conventional treatments fail to remove these contaminants from water, requiring complementary methods such as activated carbon filters, reverse osmosis, or distillation, which are expensive and seldom used in the public water supply. In recent years, there has been a search for alternative eco-friendly, low-cost methods which can effectively remove these contaminants. This study was conducted to test the effectiveness of biotite (black mica), an igneous mineral of the mica group, in removing pesticides from water. A trial was designed to assess the rate of pesticide removal using a methodology based on axes of variation of pH, temperature, concentration,and time. The pesticides tested were atrazine, fluazifopp- butyl, lambda-cyhalothrin, chlorpyrifos, and lactofen. The results showed higher removal rates in acidic conditions (pH 3) and temperatures between 20 and 30 °C, requiring about 6 h to reach maximum adsorption. More than 80 % of all the pesticides were adsorbed. The best result was obtained for fluazifop (94.2 %) in 6 h, under pH 3, and temperature of 25 °C. The study revealed that biotite has a high absorption capacity of complex and varied compounds. These findings signal the need for further studies and tests. Due to the high cost of pesticide analysis, which can only be made using a chromatograph mass spectrometer, financial resources will be required.
Type: article
Appears in Collections:ICT - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
CGE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
BIO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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