LEADER 01745nam 2200337 450 001 9910688458203321 005 20230629062034.0 035 $a(CKB)5400000000044588 035 $a(NjHacI)995400000000044588 035 $a(EXLCZ)995400000000044588 100 $a20230629d2021 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aHumic Substances /$fAbdelhadi Makan, editor 210 1$a[Place of publication not identified] :$cIntechOpen,$d2021. 215 $a1 online resource (184 pages) 311 $a1-83962-753-0 330 $aPresent in soil and water, humic substances are the most widespread organic compounds, naturally occurring from a physical, chemical, and microbiological transformation of biomolecules. They represent about 25% of the total organic carbon on the Earth and comprise up to 75% of the dissolved organic carbon in water, making them important for multiple environmental processes in both soil and aquatic systems. Despite many decades of extensive study, the formation mechanisms of humic substances are still a subject of discussion and controversy. This book examines the dynamics of humic substances, their physicochemical and biological properties, and methods for their extraction and characterization. The book also sheds light on recent advances and applications of humic substances in agriculture, environment, industry, and medicine. 606 $aHumic acid 615 0$aHumic acid. 676 $a631.417 702 $aMakan$b Abdelhadi 801 0$bNjHacI 801 1$bNjHacl 906 $aBOOK 912 $a9910688458203321 996 $aHumic substances$91428941 997 $aUNINA