Temperature dependence of the coagulation action of Al2(SO4)3 on the aqueous dispersion of sulfate lignin
https://doi.org/10.21266/2079-4304.2023.245.308-317
Abstract
The stability of dilute (0.1 g/dm3) aqueous dispersions of sulfate lignin (SL) in a wide pH range (2–12) in the presence of 10–4 M Al2(SO4)3 was studied in the temperature range of 0–20 C. An extreme dependence of stability on temperature with a minimum in the region of 10 C was found. At all temperatures, the maximum deposition of SL is observed in the pH range of 4-6. It is suggested that in the studied temperature range, the observed effect is due to a change in the structure of the boundary layers of water surrounding the SL molecules and the morphology of the formed SL aggregates, which affect the rate of their sedimentation.
About the Authors
A. V. Lorentsson
St. Petersburg State Technological University of Industrial Technologies and Design
Russian Federation
Russian Federation
LORENTSSON Alexander V. – PhD (Chemistry), Director of the Institute of Technology of the Higher School of Technology and Energy
198095. Ivan Chernykh str. 4. St. Petersburg
T. D. Gevorkyants
St. Petersburg State Technological University of Industrial Technologies and Design
Russian Federation
Russian Federation
GEVORKYANTS Tamara D. – student of the Higher School of Technology and Energy
198095. Ivan Chernykh str. 4. St. Petersburg
Yu. L. Moreva
St. Petersburg State Technological University of Industrial Technologies and Design
Russian Federation
Russian Federation
MOREVA Yulia L. – PhD (Chemistry), Associate Professor of the Department of Environmental Protection and Rational Use of Natural Resources of the Higher School of Technology and Energy
198095. Ivan Chernykh str. 4. St. Petersburg
Yu. M. Chernoberezhsky
St. Petersburg State Technological University of Industrial Technologies and Design
Russian Federation
Russian Federation
CHERNOBEREZHSKY Yuri M. – DSc (Chemistry), Professor of the
Department of Environmental Protection and Rational Use of Natural Resources of the Higher School of Technology and Energy
198095. Ivan Chernykh str. 4. St. Petersburg
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Review
For citations:
Lorentsson A.V., Gevorkyants T.D., Moreva Yu.L., Chernoberezhsky Yu.M. Temperature dependence of the coagulation action of Al2(SO4)3 on the aqueous dispersion of sulfate lignin. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2023;(245):308-317. (In Russ.) https://doi.org/10.21266/2079-4304.2023.245.308-317
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