Surface Activity of Humic Acids Depending on Their Origin and Humification Degree

Anderson, M. A., Hung, A., Mills, D., Scott, M. S. (1995). Factors affecting the surface tension of soil solutions and solutions of humic acids. Soil Sci., 160, 111–116.10.1097/00010694-199508000-00004Search in Google Scholar

Barančikova, G., Senesi, N., Brunetti, G. (1997). Chemical and spectroscopic characterization of humic acids isolated form different Slovak soil types. Geoderma, 78, 251–266.10.1016/S0016-7061(97)00033-5Search in Google Scholar

Borgmark, A. (2005). Holocene climate variability and periodicities in south-central Sweden, as interpreted from peat humification analysis. Holocene, 15 (3), 387–395.10.1191/0959683605hl816rpSearch in Google Scholar

Chen, Y., Senesi, N., Schnitzer, M. (1977). Information provided on humic substances by E₄/E₆ratios. Soil Sci. Soc. Amer. J., 41 (2), 352–358.10.2136/sssaj1977.03615995004100020037xSearch in Google Scholar

Conte, P., Agretto, A., Spaccini, R., Piccolo, A. (2005). Soil remediation: Humic acids as natural surfactants in the washings of highly contaminated soils. Environ. Pollut., 135 (3), 515–522.10.1016/j.envpol.2004.10.006Search in Google Scholar

Čtvrtničkova, A., Drastik, M., David, J., Kučerik, J. (2011). Surface and solution behaviour of surfactants produced from lignite humic acids. Fres. Environ. Bull., 20 (7A), 1764–1771.Search in Google Scholar

Engebretson, R. R., von Wandruszka, R. (1994). Microorganization in dissolved humic acids. Environ. Sci. Technol., 28, 1934–1941.10.1021/es00060a026Search in Google Scholar

Engebretson, R. R., von Wandruszka, R. (1996). Quantitative approach to humic acid associations. Environ. Sci. Technol., 30, 990–997.10.1021/es950478gSearch in Google Scholar

Gašparovic, B., Cosovic, B. (2003). Surface-active properties of organic matter in the North Adriatic Sea, Estuarine, Estuar. Coast. Shelf. S., 58, 555–566.10.1016/S0272-7714(03)00133-1Search in Google Scholar

Guetzloff, T. F., Rice, J. A. (1994). Does humic acid form a micelle? Sci. Total Environ., 152, 31–35.10.1016/0048-9697(94)90548-7Search in Google Scholar

Klavins, M. (1998). Aquatic Humic Substances. Rīga: University of Latvia. 234 pp.Search in Google Scholar

Lu, Q. X., Hanna, J. V., Johnson, W. D. (2000). Source indicators of humic substances: An elemental composition, solid state 13C CP/MAS NMR and Py-GC/MS study. Appl. Geochem., 15, 1019–1033.10.1016/S0883-2927(99)00103-1Search in Google Scholar

Milori, D. M. B. P., Neto, L. M., Bayer, C., Mielniczuk, J., Bagnato, V. S. (2002). Humification degree of soil humic acids determined by fluorescence spectroscopy. Soil Sci., 167 (11), 739–749.10.1097/00010694-200211000-00004Search in Google Scholar

Piccolo, A. (2001). The supramolecular structure of humic substances. Soil Sci., 166 (11), 810–832.10.1097/00010694-200111000-00007Search in Google Scholar

Piccolo, A., Conte, P., Cozzolino, A. (2001). Chromatographic and spectrophotometric properties of dissolved humic substances compared with macromolecular polymers. Soil Sci., 166 (3), 174–185.10.1097/00010694-200103000-00003Search in Google Scholar

Rozenbaha, I., Odham, G., Jarnberg, U., Alsberg, T., Klavins, M. (2002). Characterisation of humic substances by acid catalysed transesterification. Anal. Chim. Acta, 452, 105–114.10.1016/S0003-2670(01)01429-5Search in Google Scholar

Salati, S., Papa, G., Adani, F. (2011). Perspective on the use of humic acids from biomass as natural surfactants for industrial applications. Biotechnol. Adv., 29 (6), 913–922.10.1016/j.biotechadv.2011.07.01221827846Search in Google Scholar

Schaumann, G. E. (2006). Soil organic matter beyond molecular structure Part 1: Macromolecular and supramolecular characteristics. J. Plant Nutr. Soil Sci., 169, 145–156.10.1002/jpln.200521785Search in Google Scholar

Simpson, M. J., Simpson, A. J., Hatcher, P. G. (2004). Noncovalent interactions between aromatic compounds and dissolved humic acid examined by nuclear magnetic resonance spectroscopy. Environ. Sci. Technol., 23 (2), 355–362.10.1897/03-21714982382Search in Google Scholar

Steinberg, C. E. W. (2003). Ecology of Humic Substances in Freshwaters. Heidelberg: Springer. 563 pp.10.1007/978-3-662-06815-1Search in Google Scholar

Stevenson, F. J. (1994). Humus Chemistry. 2nd ed. New York: Wiley. 422 pp.Search in Google Scholar

Tan, K. H. (2005). Soil Sampling, Preparation, and Analysis. 2nd ed. New York: Taylor & Francis Group. 568 pp.10.1201/9781482274769Search in Google Scholar

Terashima, M., Fukushima, M., Tanaka, S. (2004). Influence of pH on the surface activity of humic acid: Micelle-like aggregate formation and interfacial adsorption. Colloids and Surfaces A: Physicochem., Eng. Aspects, 247, 77–83.10.1016/j.colsurfa.2004.08.028Search in Google Scholar

Tombácz, E. (1999). Colloidal properties of humic acids and spontaneous changes of their colloidal state under variable solution conditions. Soil Sci., 164 (11), 814–824.10.1097/00010694-199911000-00005Search in Google Scholar

Yates, L. M., von Wandruszka, R. (1999). Effects of pH and metals on the surface tension of aqueous humic materials. Soil Sci. Soc. Amer. J., 63, 1645–1649.10.2136/sssaj1999.6361645xSearch in Google Scholar

Zavarzina, A. G., Demin, V. V., Nifanteva, T. I., Shkinev, V. M., Danilova, T. V., Spivakov, B. Ya. (2002). Extraction of humic acids and theit fractions in poly(ethylene glycol)-based aqueous biphasic systems. Anal. Chim. Acta, 452, 95–103.10.1016/S0003-2670(01)01428-3Search in Google Scholar

ЛиштBаHьо И. И., Kopoль H.T. (1975). Ochoɞhble cɞoŭcmɞa mopȹa u memmo∂bl ux onpe∂eЛehuЯ [Basic Properties of Peat and Methods for Their Determination]. Mиhck Hayka и Texhиka. 320 c. (in Russian).Search in Google Scholar