742
In general , the highest efficiency of metal ion bioremoval was recorded for algal column of L . obtusa followed by G . acerosa and the lowest one was recorded for Hypnea sp . , with mean removal values of 94 % , 85 % and 71 % , respectively .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None