15080
PEM revealed that the DO was rapidly depleted , leading to the release of a huge amount of Fe ( II ) ions and hydrogen peroxide ( HPO ) in a two - phase kinetic pattern .
 Chemical: Fe ( II ); Chemical: hydrogen peroxide; Chemical: HPO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Fe ( II ); Chemical: hydrogen peroxide; Chemical: HPO