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Modified carbon nitride as an efficient adsorbent for ammonia nitrogen with low concentration
Author(s) -
Sun Hui,
Wang Wenzhong,
Wang Kefu,
Zhang Ling
Publication year - 2020
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23639
Subject(s) - adsorption , ammonia , chemistry , inorganic chemistry , ammonium , nitrogen , sodium carbonate , melamine , oxygen , ammonium carbonate , sodium , organic chemistry
The adverse effects of excessive ammonia on aquatic ecosystem have provoked the development of efficient methods for its removal. Here, we present a thermal copolymerization of melamine and sodium hydrogen carbonate and successfully introduce oxygen groups into the structure of g‐C 3 N 4 , which is applied to low‐concentration ammonia removal. Oxygen groups are introduced into g‐C 3 N 4 and increase its surface electron negativity. When the initial concentration of ammonia nitrogen is 18.74 mg L −1 , the lowest concentration of it after adsorption is 1.43 mg L −1 , and the ammonia nitrogen removal efficiency is 92.3%. The main reason for our material high performance on adsorption ammonium may be ascribed to deprotonated carboxylic acid, which has the ability to adsorb positively charged ammonium ions.