02529naa a2200157 a 450000100080000000500110000800800410001910000230006024501180008326000090020152017870021070000140199770000200201170000190203177303210205013149992008-10-02       2008    bl uuuu     u00u1 u    #d1 aFERREIRA, A. T. S.  aMonitoring Remediation Techniques Using Soil Mesofauna in Oil- Contaminated Soils in Araucária, Paraná, Brazil.  c2008  aIn Brazil, environmental accidents involving the oil industry occur every year. One of the main accidents occurred in July 2000, at the President Getúlio Vargas Refinery - REPAR, in Araucária, State of Paraná, which led to the contamination of soil and the Saldanha River watershed. Several remediation techniques were established beginning in 2000 and the soil mesofauna were chosen as indicators of soil pollution and of the effectiveness of remediation, due to their biodiversity, high reproduction rates and sensitivity to environmental stressing agents. The following treatments were monitored from October 2007 to February 2008: ploughed soil without vegetation (AM1); phyto-remediaton using bracatinga (Mimosa scabrella) (AM2); soil washing (surfactant - LESS and hydrogen peroxide) (AM3); use of heterogeneous catalysis with titanium dioxide (AM4); use of heterogeneous catalysis (TiO2) with adsorption using peat (Sphagnum) (AM5); control areas not contaminated and without any treatment effects (AM6 and AM7). Nine samples per treatment were collected, using a soil corer (0-10 cm depth), and the mesofauna was extracted in a Modified Berlese Funnel. Soil moisture, physical and chemical parameters were also analyzed. Acari predominated in all the samples, but Acari and Collembola were less abundant with ploughing (AM1) at all sample dates. Highest densities of Acari and Collembola occurred in the control (AM7) in November 2007 and January 2008. In the treatments AM4 (October and November 2007), AM5 (November 2007 and January 2008) and AM3 (January 2008) the Acari and Collembola populations densities were almost as high as in the control (AM7). In the remaining treatments populations were much lower then AM7, indicating a disruption in the biological system.1 aHAUER, V.1 aSILVA, E. T. da1 aSAUTTER, K. D.  tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.