Technical Lignosulfonates Adsorption on Hydrated Aluminum Oxide Samples

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UDС

541.183:661.185.1

DOI:

10.17238/issn0536-1036.2015.6.146

Abstract

The paper examines the interaction of technical lignosulfonates with hydrated aluminum oxide and with its form containing aminoepichlorohydrin resin Vodamin-115. Sorption was
carried out in static conditions under varying reaction parameters (period, pH, concentration of lignosulfonates, sorbent mass, additives, capable of reacting with lignosulfonates to form polyelectrolyte complexes). The sorption process was monitored by a pH change, concentration of lignosulfonates and aluminum ions by photometric method and chelatometry. It was demonstrated that lignosulfonates interacted with Al2O3 and its modified forms with a wide
variation of conditions of sorption with mono- and multimolecular lignosulfonates layers formation on the sorbent surface. As exemplified in addition of a cationic polyelectrolyte, capable of forming polyelectrolyte complexes with lignosulfonates, the increase of the Al2O3 sorption properties was indicated, as in the case of aluminum salt additive, which indicated the lignosulfonates adsorption advantage in the complex with the aluminum ions. Precipitated lignosulfonates surface layer is permeable to aluminum ions formed on dissolving of the sorbent matrix. This fact provides conditions to form a complex with aluminum and its further precipitation.

Authors

A.A. Komissarenkov1, Candidate of Chemical Sciences R.A. Kopnina1, Postgraduate Student A.A. Pozdnyakov2, Deputy Director General

Affiliation

1Saint Petersburg State Technological University of Plant Polymers, Ivana Chernykh st., 4, Saint Petersburg, 198095, Russian Federation; e-mail: kom-aa@yandex.ru
2Illim Gproup, Mira st., Bratsk-18, Irkutsk region, 665718, Russian Federation

Keywords

lignosulfonates, sorption, active aluminum oxide.

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