Interaction of the Mixture of Phenolic Acids with Modified Kaolinite under Batch and Dynamic Conditions
- Authors: Zavarzina A.G.1,2, Ermolin M.S.1,3, Demin V.V.1, Fedotov P.S.1,3
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Affiliations:
- Lomonosov Moscow State University
- Borisyak Paleontological Institute
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Issue: Vol 51, No 8 (2018)
- Pages: 938-946
- Section: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/224659
- DOI: https://doi.org/10.1134/S1064229318080124
- ID: 224659
Cite item
Abstract
Phenolic acids play an important role in the formation of soil profiles, however their cooperative sorption by mineral phases under environmentally relevant concentrations is poorly studied. In the present work the sorption of an equimolar mixture of phenolic acids by kaolinite modified with amorphous aluminum hydroxide has been studied under both batch and continuous-flow conditions. It has been found that the sorption of gallic and protocatechuic acids containing OH groups in the ortho position exceeds the sorption of p-hydroxybenzoic and methoxylated acids (vanillic, syringic, and ferulic) by an order of magnitude. The study of sorption under dynamic (continuous-flow) conditions has shown the competition of acids for binding sites, while the active centers of kaolinite-Al(OH)x are being occupied. The sorbed gallic acid displaces the other acids, which pass into solution in the following order: p-hydroxybenzoic acid > vanillic acid > syringic acid ≫ ferulic acid > protocatechuic acid. The revealed regularities indicate potentially important role of ortho-substituted hydroxybenzoic acids in the formation of soil organic matter, while p-hydroxybenzoic, vanillic, and syringic acids can be more important for the composition of soil solutions and natural waters.
About the authors
A. G. Zavarzina
Lomonosov Moscow State University; Borisyak Paleontological Institute
Author for correspondence.
Email: zavarzina@mail.ru
Russian Federation, Moscow, 119991; Moscow, 117647
M. S. Ermolin
Lomonosov Moscow State University; Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: zavarzina@mail.ru
Russian Federation, Moscow, 119991; Moscow, 119991
V. V. Demin
Lomonosov Moscow State University
Email: zavarzina@mail.ru
Russian Federation, Moscow, 119991
P. S. Fedotov
Lomonosov Moscow State University; Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: zavarzina@mail.ru
Russian Federation, Moscow, 119991; Moscow, 119991