23890
The C . elegans mycelia showed a removal efficiency of 280 mg / g at a cadmium concentration of 22 . 10 mg / L , and the removal velocity of cadmium was 0 . 107 mg / h .
 Chemical: cadmium; Chemical: cadmium
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: cadmium; Chemical: cadmium