Assertion: charcoal's property | /r/HasProperty | increased by treatment
Facets:
value: at high temperatures
type: TEMPORAL
Source sentences:
text: The adsorptive properties of charcoal can be increased by treatment with substances such as carbon dioxide, oxygen, air, steam, sulfuric acid, zinc chloride, or phosphoric acid (or combinations of these) at high temperatures (500°C to 900°C).