Neutral Zone - Insoluble Colloidal Buffer - Datasheet

Insoluble Solid Buffer: Neutral Zone is an insoluble colloidal buffer that is suspended in water. Unlike soluble buffers it can be injected at high concentrations without causing an adversely high pH. When acids are present in groundwater the food grade insoluble calcium carbonate dissolves to form soluble bicarbonate. This normally limits pH to 8.5 or less in the injection area. Other soluble buffer materials can flush out of the treatment area with groundwater flow, limiting treatment time. Neutral Zone solids are mobile during injection and are retained in the treatment area, unaffected by normal groundwater flow velocities.