Retención de pesticidas por suelos modificados "in situ" y "ex situ" con un surfactante catiónico
- Rodríguez Cruz, María Sonia
- Sánchez Martín, María Jesús
- Andrades Rodríguez, María Soledad
- Sánchez Camazano, María
- Jiménez Ballesta, Raimundo (ed. lit.)
- Álvarez González, Ana María (ed. lit.)
- Torre Haro, Adrián de la (comp.)
Publisher: Universidad Autónoma de Madrid
ISBN: 84-689-2620-5
Year of publication: 2005
Volume Title: Libro de actas
Volume: 1
Pages: 619-623
Congress: Simposio Nacional sobre Control de la Degradación de Suelos (2. 2005. Madrid)
Type: Conference paper
Abstract
A study of the effect of a clayey soil modified “in situ” and “ex situ” with the cationic surfactant octadecyltrimethylammonium bromide (ODTMA) on the retention of linuron, atrazine and metalaxyl is carried out. Leaching of these compounds was studied in columns of clayey soil natural and modified by direct injection of the surfactant “in situ”, and in columns of a sandy soil natural and modified by intercalation of a barrier of the clayey soil saturated “ex situ” with the surfactant. Percolation curves indicate a total immobilization of linuron in modified soils and a decrease in the leaching kinetic of atrazine and metalaxyl in relation to that obtained in the natural soil. The results obtained point to the interest of the clayey soil modified “in situ” or “ex situ” with the surfactant ODTMA in the immobilization of pesticides of different hydrophobicity.