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We then developed a low - cost and high - performance adsorbent composed of a hydrotalcite - like compound for arsenic and iron .
 Chemical: hydrotalcite; Chemical: arsenic; Chemical: iron
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: hydrotalcite; Chemical: arsenic; Chemical: iron