Term
| the range of oxidation states of C |
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Definition
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Term
| some biomolecules that ca be found in soil |
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Definition
-monosacs, polysacs, and oligosacs
-amino acids, peptides, and proteins
-nucleic acids and antibiotics
-fats, waxes, lipids, phospholipids, and other lipids
-lignins, cutins, and suberins |
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Term
| the products of decomposition of biomolecules |
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Definition
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Term
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Definition
-humins
-humic acids
-fulvic acids |
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Term
| the behavior of organic compounds and their interactions with other substances in the aqueous and solid phases are controlled by... |
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Definition
| the type and abundance of polar or ionic functional groups and nonpolar structural components |
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Term
| the valence state inorganic C is found in |
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Definition
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Term
| the carbon species in soil solutions that are not discernable from each other |
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Definition
| -dissolved carbon dioxide (CO2 • H2O)
-carbonic acid (H2CO3) |
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Term
| the combined term that represents dissolved carbon dioxide (CO2 • H2O) and carbonic acid (H2CO3) |
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Definition
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Term
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Definition
| acid that can donate more than 1 proton to solution |
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Term
| the particular species of any polyprotic acid, including those of inorganic carbon, in soil solution depends on... |
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Definition
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Term
| the ligands of C that form stable stable aqueous complexes with numerous metal cations |
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Definition
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Term
| the C species that's strongly adsorbed by Al and Fe oxyhydrides and clay minerals via ligand-exchange mechanisms |
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Definition
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Term
| the valence state of Si in soils |
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Definition
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Term
| how Si exists in the mineral phase |
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Definition
| as the silicate tetrahedron (SiO4-4 |
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Term
| how SiIV links to other metals |
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Definition
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Term
| does SiIV bond with other SiIV atoms? |
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Definition
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Term
| the dominant Si species in soil solutions |
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Definition
| silicic acid (H4SiO4 or Si(OH)4) |
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Term
| when silicic acid deprotenates |
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Definition
| when pH > 9.86, forming Si(OH)3- |
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Term
| how the concentration of silica in soil solutions is controlled |
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Definition
| kinetically, by the dissolution of primary silicate minerals and the precipitation of secondary silicate minerals |
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Term
| the oxidation Pb has in soil |
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Definition
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Term
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Definition
-trace component of primary minerals
-for Ca in feldspars, pyroxenes, and phosphates
-Fe and Mn in oxyhydrides |
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Term
| how Pb may occur in the soil solution |
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Definition
| as free Pb2+ or as a hydrolysis product, depending on pH |
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Term
| some things Pb2+ forms stable aqueous complexes with |
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Definition
| -OH-
-numerous inorganic ligands |
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Term
| something organic in soils Pb=@ may be associated with |
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Definition
| fulvates and other dissolved organic compounds |
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Term
| how Pb is commonly found in soil |
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Definition
| in an adsorbed phase, either exchangeable or strongly complexed by metal oxyhydroxides via proton exchange |
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