Применение янтарной кислоты в процессе фитоэкстракции свинца и кадмия из загрязненных почв

Succinic acid influence on migration properties of lead and cadmium in soil-plant system has been investigated. It has been shown that the addition the activator (succinic acid) into soil increases the efficiency of phytoextraction of lead and cadmium. The optimum conditions of succinic acid usage as the process activator have been established.В работе изучено влияние янтарной кислоты на миграционные свойства свинца и кадмия в системе «почва-рстения». Установлено, что внесение в почву активатора - янтарной кислоты повышает эффективность процесса фитоэкстракции свинца и кадмия. Установлены оптимальные условия применения янтарной кислоты в качестве активатора процесса

Succinic acid influence on migration properties of lead and cadmium in soil-plant system

Succinic acid influence on migration properties of lead and cadmium in soil-plant system has been investigated. It has been shown that the addition the activator (succinic acid) into soil increases the efficiency of phytoextraction of lead and cadmium. The optimum conditions of succinic acid usage as the process activator have been established

STABILITY OF COORDINATION COMPOUNDS OF SOME d-METAL IONS WITH SUCCINIC ACID ANION IN AQUEOUS-ETHANOL SOLVENTS

The paper provides an overview of own data on complexation of nickel (II), cobalt (II) and cooper (II) ions with succinic acid anion in water-organic mixed solvents. Proper data are compared with data reported in literature for d-metal complexes with anions of maleic and succinic acids. The effect of aqueous ethanol solvent compositions on the stability of coordination compounds of M2+ with succinic acid anion as well as on pK values of stepwise succinic acid dissociation was carried out by a potentiometric titration at ionic strength of 0.1 maintained with sodium perchlorate at 298.15 +/- 0.10 K. Mono ligand complexes of Ni2+, Co2+ and Cu2+ ions with succinic acid anion become stronger when ethanol content rises. In aqueous solutions Cu2+ ion forms stronger complexes with succinic and maleic acid anions than Ni2+ and Co2+ ions. In the studied water - ethanol solution this ratio is maintained for complexes with succinic acid anion, but a water-isopropanol solvent exerts leveling effect on the stability of complexes of nickel (II) and cobalt (II). An increase in the stability of complexes of d-metal with anions of maleic and succinic acids is due to the destabilization of the ligand with increasing ethanol concentration. The principal contribution of the changes in the solvation state of ligand is a typical for the stability changes of d-metal complexes with amine, glycinate, and acetate type ligands in water-organic mixed solvents