Articles | Volume 20, issue 23
Atmos. Chem. Phys., 20, 14509–14522, 2020
https://doi.org/10.5194/acp-20-14509-2020
Atmos. Chem. Phys., 20, 14509–14522, 2020
https://doi.org/10.5194/acp-20-14509-2020

Research article 30 Nov 2020

Research article | 30 Nov 2020

Lignin's ability to nucleate ice via immersion freezing and its stability towards physicochemical treatments and atmospheric processing

Sophie Bogler and Nadine Borduas-Dedekind

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Cited articles

Attard, E., Yang, H., Delort, A.-M., Amato, P., Pöschl, U., Glaux, C., Koop, T., and Morris, C. E.: Effects of atmospheric conditions on ice nucleation activity of Pseudomonas, Atmos. Chem. Phys., 12, 10667–10677, https://doi.org/10.5194/acp-12-10667-2012, 2012. 
Augustin-Bauditz, S., Wex, H., Denjean, C., Hartmann, S., Schneider, J., Schmidt, S., Ebert, M., and Stratmann, F.: Laboratory-generated mixtures of mineral dust particles with biological substances: characterization of the particle mixing state and immersion freezing behavior, Atmos. Chem. Phys., 16, 5531–5543, https://doi.org/10.5194/acp-16-5531-2016, 2016. 
Axson, J. L., May, N. W., Colón-Bernal, I. D., Pratt, K. A., and Ault, A. P.: Lake Spray Aerosol: A Chemical Signature from Individual Ambient Particles, Environ. Sci. Technol., 50, 9835–9845, https://doi.org/10.1021/acs.est.6b01661, 2016. 
Birkel, U., Gerold, G., and Niemeyer, J.: Abiotic reactions of organics on clay mineral surfaces, in: Developments in Soil Science, edited by: Violante, A., Huang, P. M., Bollag, J.-M., and Gianfreda, L., Elsevier, Amsterdam, the Netherlands, 437–447, 2002. 
Boerjan, W., Ralph, J., and Baucher, M.: Lignin Biosynthesis, Annu. Rev. Plant Biol., 54, 519–546, https://doi.org/10.1146/annurev.arplant.54.031902.134938, 2003. 
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Short summary
To study the role of organic matter in ice crystal formation, we investigated the ice nucleation ability of a subcomponent of organic aerosols, the biopolymer lignin, using a droplet-freezing technique. We found that lignin is an ice-active macromolecule with changing abilities based on dilutions. The effects of atmospheric processing and of physicochemical treatments on the ability of lignin solutions to freeze were negligible. Thus, lignin is a recalcitrant ice-nucleating macromolecule.
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