Author/Editor		Gabrijelčič, Elizabeta; Trebše, Polonca; Drobne, Damjana
Title		Ugotavljanje strupenosti organofosfatnega pesticida diazinona za kopenske enakonožne rake Porcellio scaber (Isopoda, Crustacea)
Type		članek
Source		In: Glavič P, Brodnjak-Vončina D, editors. Zbornik referatov s posvetovanja Slovenski kemijski dnevi 2001: 1. del; 2001 sep 20-21; Maribor. Maribor: Univerza v Mariboru, Fakulteta za kemijo in kemijsko tehnologijo,
Publication year		2001
Volume		str. 369-74
Language		slo
Abstract		Recent research has shown that chemical amendments, such as synthetic organic chelates, can enhance phytoextraction by increasing heavy metals bioaviability in soil thus enhancing plant uptake and translocation of heavy metals from the roots to the shoots. Of the chelates tested, ethyiene diamine tetraacetic acid (EDTA) was often found to be the most effective. In situ application of chelating agents can cause groundwater pollution by uncontrolled metal dissolution and leaching therefore new techniques of chelate application to safely increase bioavailability of heavy metals in soils need to be developed. In the present study carrageenan, starch and commercial acrylamide hydrogel stockosorb were used as a carriers for EDTA (1,877 mmol g-1). The release of EDTA from carriers into deionised water was determined. During 30 days of incubation 19.2, 48 and 60.2% of EDTA were released from carrageenan, starch and acrytamide hydrogel respectively. In seven week soil column experiment the effects of different modes of EDTA (5 mmol kg-1 soil) application on Pb uptake by test plant Brassica rapa, leaching of Pb through the soil profile and chemical speciation of Pb in soil were studied. In treatments with weekly addition of EDTA in water solution 49.6% of initial total Pb in soil was leached through soil profile. 5.4, 20.6 and 23.6 of initial total Pb in soil were leached in treatments with carrageenan, starch and stockosorb as carriers for EDTA respectively. The highest concentration of Pb in shoots of Brassica rapa was measured in treatments with weekly addition of EDTA in water solution.
Descriptors		DIAZINON TOXICITY TESTS ACETYLCHOLINESTERASE CRUSTACEA