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sulfuration
Bacteria feed on this oil and release hydrogen sulfide gas.
When hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid.

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Open the tool →硫化 (liú huà) means “vulcanization, sulfuration”.
硫化 is pronounced liú huà in Mandarin Chinese.
“vulcanization” is 硫化 (liú huà) in Chinese.
This page has 2 example sentences using 硫化, each with pinyin and an English translation.