4943
Subsequently , sorption of native PAHs to the best performing GAC 1240W ( 0 . 45 - 1 . 70 mm ) was studied for sediment only and for GAC - sediment mixtures at different GAC - sediment weight ratios , using 76 - micro m polyoxymethylene ( POM ) passive samplers .
 Chemical: PAHs; Chemical: polyoxymethylene; Chemical: POM
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: PAHs; Chemical: polyoxymethylene; Chemical: POM