What term describes water containing very little H2S?

The terminologies used in refinery processes are crucial for understanding the handling and treatment of various types of water. In this context, the term that accurately describes water containing very little hydrogen sulfide (H2S) is "stripped water."

Stripped water refers to water that has undergone a stripping process to remove dissolved gases such as hydrogen sulfide. This process typically involves exposing the water to conditions that facilitate the off-gassing of H2S, resulting in a product that has significantly lower concentrations of this compound. Stripping is essential in maintain the environmental and safety standards in refinery operations, as H2S can be highly toxic and corrosive.

In contrast, "sour water" usually contains significant amounts of H2S and other sour compounds, making it a more hazardous form of wastewater. "Lean water" refers to water that has lower concentrations of contaminants compared to "rich water," which contains higher levels of dissolved species, often including H2S. Each of these terms is important in understanding the processing and treatment of water in refining processes, but when it comes specifically to water with very low H2S content, "stripped water" is the most accurate choice.