Seasonal fluctuations of organochlorine and triazines pesticides in the aquatic system of Ioannina basin (Greece)

Water chemistry and biology in a shallow lake (Lake Pamvotis - Greece). Present state and perspectives

“…It is clear that the increase of eutrophication process is attributed to the sewage discharge into the lake, the point-pollution sources along the lake-shore and the agri- cultural diffuse pollution. (Albanis et al, 1986). After the operation of the sewage treatment unit, at 1990s and the removal of some point pollution sources (as industries, poultries etc.…”

“…Zooplankton grazing is in turn influenced by the abundance of zooplanktivorous fish (Brooks and Dodson, 1965) and may be phytoplankton affected by trophic interactions that cascade from fish to phytoplankton (Carpenter, 1985;Kitchell, 1992). Previous studies have been published concerning the physical, chemical and biological features of lake Pamvotis (Albanis et al, 1986;Koussouris et al, 1989;Margaris and Koussouris, 1990;Theochari and Papadopoulos, 1990;Andreadakis and Vasilopoulou, 1991;Stalikas et al, 1994;Paschos et al, 1995). In the present study, water quality was monitored over 1-year period in order to gain a comprehensive view and establish a preliminary baseline condition of shallow and eutrophic lake Pamvotis.…”

“…100.000), laying along the southwestern shoreline. Moreover, agricultural efflu-ents of several smaller settlements and light industrial wastes from the surrounding area inflow the lake (Albanis et al, 1986;Stalikas et al, 1994). Eutrophication causes frequent algal blooms, depletion of dissolved oxygen and the rapid sediment accumulation, caused by high productivity, decreases the depth and enlarges the macrophyte zone (Sarika-Hatzinikolaou M., 1994).…”

“…It's a shallow (mean depth=4m) lake (Romero and Imberger, 1999) and occupies an area of 22.8 km 2 (Albanis, 1986;Georgiadis, 2000). The total volume of water varies between 80×10 6 (summer) and 125×10 6 (winter) according to Albanis et al (1986). The catchment area of lake Pamvotis (330 km 2 ; Margaris and Koussouris, 1989) consists of two morphological units, i.e.…”

Assessing the transfer of pesticides to the atmosphere during and after application. Development of a multiresidue method using adsorption on Tenax and thermal desorption-GC/MS

“…The intensive use of pesticides all over the world led to ubiquitous contamination of exposed and remote areas, not only in water [1,2,3,4,5,6] and soil [7,8] but also in the atmosphere [9,10,11,12,13,14,15,16,17,18,19,20,21,22], as a result of drift during spraying [22,23], volatilisation and wind erosion [24,25,26,27,28,29]. It is known that air is a good pathway for transportation and re-deposition leading to the contamination of non-target areas [30] and may induce some risks for human health [31,32], wildlife and forest ecosystems [9,20,33].…”