Berikut merupakan kutipan ilmiah yang disusun dan digunakan sebagai referensi pribadi.
What is methane and where does it come from?
Methane is a gas composed of carbon and hydrogen. It has the chemical formula CH4. Methane originates from several different sources.
Microbial methane is produced through biologic decomposition of organic matter at shallow depths and without extensive heating. Swamps, landfills, glacial or other deposits, and even shallow bedrock are some settings where microbial methane can form.
Thermogenic methane is derived over millions of years by processes deep underground that produce fossil fuels, such as coal deposits and oil and natural gas accumulations. It is produced from organic matter that undergoes a transformation under high temperature and pressure. Scientists run tests that can help distinguish microbial methane from thermogenic methane.
How does methane get into water wells?
Methane gas – whether microbial or thermogenic -- can migrate into water wells along with the groundwater if underground conditions are favorable for it. If biogenic or thermogenic methane is present underground and in contact with the groundwater, the methane can dissolve in water similar to the way carbon dioxide is dissolved in soda, bubbling out when pressure is reduced at the surface or home faucet.
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