Results 251 to 260 of about 587,836 (298)

Humic substances as surfactants

Environmental Chemistry Letters, 2009
Humic substances from soils and sediments can be defined as surface active substances based on the surface tension measurements. Although there are several micellar structural models of humic substances currently available, few studies evaluating humic substances as surfactants have been conducted to date.
Maris Klavins, Oskars Purmalis
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THE SUPRAMOLECULAR STRUCTURE OF HUMIC SUBSTANCES

Soil Science, 2001
The scientific understanding of the molecular size and shape of humic substances (HS) is critically reviewed. The traditional view that HS are polymers in soil is not substantiated by any direct evidence but is assumed only on the basis of laboratory experiments with model molecules and ...
openaire   +2 more sources

Humic Substances

Chemistry International -- Newsmagazine for IUPAC, 2008
J. Lag, Amos Hadas, Rhodes W. Fairbridge, J. C. Nóvoa Muñoz, X. Pontevedra Pombal, A. Martínez Cortizas, Gonzalo Almendros   +6 more
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THE PRINCIPLES OF HUMIC SUBSTANCES

Soil Science, 2001
Two principles are presented that define the molecular nature and ecological role of humic substances (HS). The First Principle (i) accounts for and organizes an extensive body of apparently disparate data relating to the inability to purify and establish a molecular structure for HS; (ii) offers a conceptual framework for dealing with HS and for ...
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Humic substances

Environmental Science & Technology, 1982
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HUMIC SUBSTANCES AND HUMIFICATION

2000
Ziechman, W., Hübner, M., Jonassen, K.E.N., Batsberg, W., Nielsen, T., Hahner, S., Hansen, Poul Erik; id_orcid 0000-0003-4751-9910, Gudmundsson, Anne-Lise Rørbech   +7 more
openaire   +2 more sources

Effect of Humic Substances on the Anaerobic Digestion of Secondary Sludge in Wastewater Treatment Plants: A Review

Environmental Chemistry Letters, 2023
Qilin Wang, Zhenyao Wang, Carol Sze Ki Lin   +2 more
exaly  

Humic Substances

Soil Science, 1985
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Aquatic Humic Substances

1985
This chapter discusses the amount and nature of aquatic humic substances in all types of natural waters. The chapter contains thirteen major divisions and is the largest chapter. The major divisions include: early studies of aquatic humus, overview of isolation procedures, amount of humic substances in water, elemental composition of aquatic humus ...
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Humic Substance

2005
Congqiang Liu, Fengchang Wu
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