Lecture Notes (PDF) - Aqueous and Environmental Geochemistry

More documents

Recommendations

Info

Environmental GeochemistryDM Sherman, University of Bristol2007/2008The Global Carbon Cycle (in 10 15 g)Atmosphere (748 as CO 2 )CO 2Dissolution/Degassing (100)Oceans(37000 as HCO 3- )0.2Rivers (0.6)Respiration (60)Photosynthesis (120)Biosphere(1600)Soil (1200-1600)Respiration (60)Volcanic Emission(0.048-0.18)Lithosphere (50 x 10 6 as CaCO 3 ; 3870 as Oil/Gas/Coal)Autotrophic OrganismsA variety of chemolithoautotrophs are found in springs andin the “deep biosphere”.Photosynthetic algeaChemolithoautotrophsPage ‹#›
Environmental GeochemistryDM Sherman, University of Bristol2007/2008Autotrophic Organisms (cont.)At black smokers at mid-oceanridge hydrothermal zones, energyis derived from sulfide oxidizingbacteria.Chemolithotrophic respiration2H 2 + O 2 → 2H 2 OMetabolic ReactionΔG (kJ/mole O 2 )-474.42H 2 S + O 2 → 2H 2 O + 2S-418.72S + O 2 + 2H 2 O → H + + HSO 44Fe 2+ + 4H + + O 2 → 2H 2 O + 4Fe 3+ -281.6NH 4++ 1.5O 2 → NO 2-+ H 2 O + 2H + -163.5Page ‹#›
Page 1 and 2: Environmental GeochemistryDM Sherma
Page 5: Environmental GeochemistryDM Sherma

Lecture Notes (PDF) - Aqueous and Environmental Geochemistry

Create successful ePaper yourself

Delete template?

Save as template?