The use of various chelating agents (EDTA, HEDP, NTPM, EDTMP) for remediation of polluted with heavy metals (Cu(II), etc.) natural and anthropogenic sediments containing ion(III) hydroxides was compared. The dependence of Cu(II) sorption by goethite (α-FeOOH) on several factors was determined- the nature and concentration of chelating agents, the acidity of solution. For the increase of Cu(II) sorption (immobilization) EDTMP and NTPM are more efficient (pH = 5-3), compared to EDTA. Conversely, to reduce Cu(II) sorption (remobilization) the best chelating agent is EDTA (pH = 2-10). Goethite demetallization under the action of chelating agents (pH = 8, chelating agent:Cu(II) = 1-10) was studied. The desorbing effect of chelating agents on Cu(II) is reduced in the order: EDTA ≈ NTPM > EDTMP > HEDP.
ремедиация почв, тяжелые металлы, сорбция, гетит, комплексоны, ЭДТА, НТФ, ОЭДФ, ЭДТФ, soil remediation, heavy metals, sorption, goethite, chelating agents, EDTA, NTPM, HEDP, EDTMP
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