Coal is one of the sources of nitrogen-containing compounds (NCCs). Recovery of NCCs from brown in high yield was carried out from tars of stepwise semicoking of brown coals. Humic acids have been shown to contain many types of nitrogen compounds. Humic acids are thought to be complex aromatic macromolecules with amino acids, amino sugars, peptides, and aliphatic compounds that are involved in the linkages between the aromatic groups. Humic acids extracted from peats, brown coals, and lignites, are characterized using different techniques. Humic substances (HSs) have several known benefits to agriculture. The properties of humic substances vary from source to source, because they are heterogeneous mixtures of biochemical degradation products from plant and animal residues, and synthesis activities of microorganisms. HSs have been considered to be a significant floculant in surface water filtration plants for the production of drinking water as well as the processing of water. HSs are produced from chemical and biological degradation of plant and animal residues and from synthetic activities of microorganisms.
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Original Articles
Humic Substances and Nitrogen-Containing Compounds from Low Rank Brown Coals
Ayhan Demirbas
Selcuk University, Konya, Turkey
, Yakup Kar
Selcuk University, Konya, Turkey
& Huseyin Deveci
Selcuk University, Konya, Turkey
Pages 341-351
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Published online: 19 Aug 2006
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