intraphase soil processes – Flashcards
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| how the toxic effects of Al can be reversed |
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| when properly managed, they can be reversed by returning Al to solid phases that are sparingly soluble one way this can be done is by liming to raise the pH |
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| some potentially toxic metals |
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| -Pb -Cd -Hg -As -Cr -Al |
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| some intraphase processes that can happen in the soil organic matter |
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| -functional group formation -synth/decay -structural rearrangement |
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| some intraphase processes that can happen in the soil minerals |
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| -crystallization -functional group formation -oxidation/reduction |
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| some things that can happen in the soil solution (aqueous phase) |
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| -hydration -hydrolysis -acid-base -oxidation-reduction -complexation |
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| a soil's reactivity is mostly regulated by... |
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| the aqueous phase |
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| how hydrolysis can detoxify soluble elements |
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| by removing element from its toxic form and binding it with an OH- |
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| Lowry-Bronstead bases |
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| species in solution that accept protons |
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| Lowry-Bronstead acids |
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| species in solution that donate protons |
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| aqueous complexation aka ion pair formation |
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| when a cation and an anion of unequal charge combine to form a polyatomic ionexample: Cd2+ + Cl- --> Cd+ |
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| Lewis acid |
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| cation that initiates a chemical rxn by employing an unoccupied electronic orbital |
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| a Lewis base is a... |
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| ligand |
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| ligand |
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| a substance that initiates a chemical rxn by employing a doubly occupied electronic orbital |
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| what ligands can do to other species in the soil solution |
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| charge neutral or an anion |
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| Lowry-Bronstead acidity |
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| special case of Lewis acidity, where H+ is the cation |
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| the cation in Lowry-Bronstead acidity |
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| H+ |
