There was displayed a possibility of chelating agents application (EDTA, EDTMP) for remediation of sod-podzol soils, which were artificially polluted with by heavy metals (HM) – Cu(II), Pb(II), Zn(II), Cd(II). There was established a dependence of HM sorption on some factors (nature of metals, pH, and humic matter content in soils). There was described identical sorption behavior of low humic soils and synthetic goethite (α-FeOOH). There was studied process of soils demutualization by the action of water solutions of chelating agents under different value of pH of extract solution (pH = 2 - 10) and mole ratio reagents (chelating agent : HM = 1 - 20). There was demonstrated that the extraction by EDTA solution (twentyfold redundancy in relation to HM) during 1 - 2 hours leads to high degree of extraction of Cu (II), Cd (II) (70 – 95 % of acid-soluble forms) and less effective extraction of Pb (II) (5 – 35 %). Optimal for extraction pH of medium corresponds to range of pH of 5 - 8. Desorbed action of EDTMP was expressed more weak (in comparison with EDTA), that is connected with more strong sorption of phosphonates.

Artificial contamination with heavy metals (up to 50mg/kg) of sod-podzolic agricultural soil is performed; mobile and acid soluble fractions of Cu(II), Pb(II), Cd(II) are determined. Metal extraction from contaminated soil with EDTA aqueous solution at pH=2-10 is studied. It is established that amounts of extracted metals were 60-95% of total Cd(II) and Cu(II) content and only 3-33% of total Pb(II). EDTA-induced remobilization is decreased in the metal sequence Cd(II) > Cu(II) >> Pb(II). Maximum efficiency of metal extraction is observed at pH=4. Application of EDTA for heavy metal removal from natural sediments is discussed.

The results of absorption spectroscopy studies on complex formation of copper(II) with Alizarin Red S (NaH2Aliz) in aqueous solution are given. At pH>4 the 1:2 (metal:ligand) complex is formed which is stable at wide pH range (622= Cu2+ + 2 HAliz2-). Formation of this colored complex (e = 1.35.104 М-1см-1 at λ = 515nm) can be used for spectrophotometric determination of copper (II) at pH = 5 in the presence of other divalent metals.

Electrochemical reduction of 1,2-dihydroxyanthraquinone (alizarin) at platinum electrode in dimethylsulfoxide solution was studied. Alizarin reduction is a step two-electron process; its characteristics were determined. It was shown that formation of 1:1 complex with copper (II) ion influences the potentials and reversibility of alizarin reduction. Copper (II) ion bound to alizarin is electrochemically active what makes this system promising for development of a new stripping voltammetry method for copper determination.