19533
The hydrogen bond , hydrophobic , and pi - pi stacking interactions were dominant factors for the strong adsorption of BPAP , instead of the pH ionic strength and other ionic species in contaminated water .
 Chemical: hydrogen; Chemical: BPAP
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: hydrogen; Chemical: BPAP