Physicochemical study of interaction between polychlorobiphenyls and an amino acid reagent in solutions and soils

• Published in: Eurasian soil science Vol. 41; no. 8; pp. 852 - 859
• Main Authors: Kurochkina, G. N., Sevost’yanov, S. M., Deeva, N. F., Il’ina, A. A.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.08.2008; Springer; Springer Nature B.V
• Subjects: Amino acids; Chemical tests and reagents; Chlorine; Chromatography; Dechlorination; Earth and Environmental Science; Earth Sciences; Forest soils; Geotechnical Engineering & Applied Earth Sciences; Hydrogen; Hydrogen bonding; Infrared spectroscopy; Liquid chromatography; PCB; Polychlorinated biphenyls; Soil Chemistry; Soil contamination; Soil sciences; Spectrum analysis; EURASIAN Soil Science; Water Solution; Polychlorinated Biphenyl; Gray Forest Soil; Total PCBs
• ISSN: 1064-2293; 1556-195X
• DOI: 10.1134/S1064229308080073

The interaction between polychlorobiphenyls (PCBs) and an alkaline amino acid reagent (NaL) in solutions and a gray forest soil contaminated by these solutions was studied by IR spectroscopy and gas-liquid chromatography depending on the component concentrations and reaction time. Intermolecular interaction of PCBs with NaL by hydrogen bonds of hydroxyl, amide, and carboxyl groups, as well as the detachment of chlorine from the aromatic ring of PCB molecules, was revealed in solutions. A significant decrease (by 32 to 75%) in total PCBs was observed in solutions and gray forest soil in the presence of the amino acid reagent depending on the concentration of the reagent and the amount of its addition to soil samples. Changes in the relative content of low-and high-chlorinated PCB congeners were revealed in solutions and PCB-contaminated gray forest soil in the presence of the amino acid reagent, which indicated their stepwise dechlorination.