6013
Experimental results showed that the optimum conditions for decolourization were pH 3 . 0 , Fe ( 0 ) 1g / L , H ( 2 ) O ( 2 ) 5 . 15 x 10 ( - 3 ) mol / L with ultrasound density of 120W / L at 60kHz .
 Chemical: Fe ( 0 ); Chemical: H ( 2 ) O ( 2 )
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 ( 0 ); Chemical: H ( 2 ) O ( 2 )