Carbon sequestration in soils
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The document discusses carbon sequestration in soils as a method to combat rising atmospheric CO2 levels and its associated climate change impacts, indicating that pre-industrial CO2 levels have significantly increased. It highlights techniques for capturing CO2, such as conservation tillage, cover crops, and proper soil management, while emphasizing the role of soil health in achieving food security. The authors conclude that while carbon sequestration cannot completely eliminate atmospheric CO2, it is essential for reducing levels and enhancing soil quality.
Carbon sequestration in soils
- 1. CARBON SEQUESTRATION IN SOILS By H.SAI NADH DORA(13331A0816) ARUNENDRA YADAV(1331A0803) B KUSUM KUMAR(1331AO804) DEPARTMENT OF CHEMICAL ENGINEERING MVGR COLLEGE OF ENGINEERING(AUTONOMOUS) VIZIANAGARAM
- 2. INTRODUCTION In pre-industrial times, every million molecules of air contained about 280 molecules of carbon dioxide. Today that proportion exceeds 380 molecules per million. If carbon dioxide levels continue upward, further warming could have dire consequences, resulting from rising sea levels, agriculture disruptions, and stronger storms (e.g. hurricanes) striking more often. Fossil fuels, which provide about 85 percent of the world’s energy, are made of hydrocarbons, and burning them releases huge quantities of carbon dioxide.
- 3. Strategies to Reduce Atmospheric CO2 Strategies Reduce fossil fuel consumption Identify sinks and sequestration rate Improve efficiency Renewable energy sources Terrestrial Aquatic Soils Plants Geologic
- 4. WHAT IS CARBON SEQUESTRATION ? Carbon sequestration is capturing the carbon dioxide produced by burning fossil fuels and storing it safely away from the atmosphere.
- 5. HOW DO WE CAPTURE CO2 ? There are several processes that captures CO2 some of them are: Commercial Carbonization in beverage industries , dry ice manufacturing. Crystal structure of dry iceCarbonated water
- 6. Conservation tillage Cover crops Soil organic matter TECHNIQUES TO ENHANCE CARBON SEQUESTRATION IN SOILS Crop rotation
- 7. Why Tillage Eliminate soil compaction Control weeds Eliminate residue Harbor insects and diseases Tie up fertilizer N Barrier for herbicide What hard working people do Sense of accomplishment Cleansing operation Why not? Because it causes soil erosion and reduces soil organic matter
- 8. Soil Organic Matter (Humus) CO2 product energy Climate ManagementSoil Type
- 9. Potential cost of soil sequestration of soil Nitrogen fertilizer Nitrogen fertilizer can increase soil organic matter because nitrogen is often limited in agro ecosystems. Growing plants on semi-arid lands Growing plants on semiarid lands has been suggested as a way to increase carbon storage in soils.
- 10. Burning coal with pure oxygen rather than atmospheric air. Replacing smoke stacks with absorption tower
- 11. CONCLUSION Carbon sequestration can be done to reduce the carbon content in atmosphere but not totally. Apart from reducing the global CO2 levels, soils carbon sequestration is a strategy to achieve food security through improvement in soil quality. Carbon sequestration will enable us increase and maintain retention time of CO2 in soils, water bodies etc.
- 12. Any queries ?