Molecular Compounds of Biogeochemical Cycles

Molecular Compounds of Importance in Environmental Microbiology

Carbon Cycle

CO₂ Carbon Dioxide

CH₄ Methane

CaCO₃ Calcium Carbonate (limestone)

CO₃^2- Carbonate Ions

Nitrogen Cycle

N₂ Molecular Nitrogen

NH₃ Ammonia

NH₄⁺ Ammonium Ion

NO₂^- Nitrite Ion

NO₃^- Nitrate Ion

N₂O Nitrous Oxide

Sulfur Cycle

S^o Elemental Sulfur

H₂S Hydrogen Sulfide

SO₄^2- Sulfate Ion

-SH Sulfhydryl Groups of Proteins

SO₂ Sulfur Dioxide

H₂SO₃ Sulfurous Acid (acid rain)

Phosphorous Cycle

PO₄^3- Phosphate Ion

Ca(H₂PO₄)₂ Monobasic Calcium Phosphate

Ca₂HPO₄·2H₂O Dibasic Calcium Phosphate

Ca₃(PO₄)₂ Tribasic Calcium Phosphate

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