Phosphorus is the component of ATP, cell membrane and genetic material of the livings in form of phosphate ion (PO 4 3- ). Phosphorus is always collected in rock. NO LIVINGS can reduce or oxidize phosphorus. It is insoluble in water. But it can be ionized by acid. Phosphorus cycle is happened in soil, water, and livings. Not in atmosphere. Phosphorus Cycle
Reaction in Phosphorus Cycle When the soil is acid. Phosphorus will be in the form of solution, so plants can use it. Ca 3 (PO 4 ) 2 + 4HNO 3 Ca(H 2 PO 4 ) 2 + 2Ca(NO 3 ) 2 Ca 3 (PO 4 ) 2 + H 2 SO 4 CaHPO 4 + 2CaSO 4
Animation of Phosphorus Cycle Go to Phosphorus Cycle Animation
Sulfur is the main component in many kinds of amino acid. The livings can use sulfur in form that is soluble in water, such as SO 4 2-, or inorganic reducing agent, such as H 2 S that is oxidized by O 2 or O 3 and turns to sulfurus (SO 2 - ). Some of them are collected in charcoal, petroleum, or atmosphere.
Reaction in Sulfur Cycle Sulfur ในบรรยากาศสามารถทำปฏิกิริยากับ น้ำและทำให้เกิดฝนกรด (Sulfuric Acid) แบคทีเรียบางชนิดใช้ H 2 S และเปลี่ยนให้เป็น Sulfuric Acid 2H 2 S + O 2 2H 2 O + 2S + Energy 2S + 3O 2 + 2H 2 O2H 2 SO 4 2S + 6HNO 3 + 2H 2 O2H 2 SO 4 + 3N 2 Beggiatoa sp. Thioploca sp. Thiobacillus sp. Thiobacillus denitrificans SO 2 - + H 2 O H 2 SO 3 SO 3 - + H 2 O H 2 SO 4