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Removal of copper ions by few‐layered graphene oxide nanosheets from aqueous solutions: external influences and adsorption mechanisms
Author(s) -
Wang Hui,
Hu Xinjiang,
Guo Yuan,
Qiu Caisheng,
Long Songhua,
Hao Dongmei,
Cai Xiaoxi,
Xu Wenwen,
Wang Yufu,
Liu Yunguo
Publication year - 2018
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5601
Subject(s) - adsorption , aqueous solution , copper , formate , inorganic chemistry , chemistry , oxide , graphene , chemical engineering , catalysis , organic chemistry , engineering
BACKGROUD In this work, graphene oxide (GO) was synthesized followed by a modified Hummers method and several characterization techniques were provided. Its adsorptive activity was evaluated based on the removal of Cu(II) from an aqueous solution. External influences were taken into account to further study the adsorption mechanism. RESULT Characterization results revealed that GO was well prepared and a large amount of oxygen‐containing functional groups were introduced. The Cu(II) adsorption increased with increasing solution pH and precipitate at alkaline conditions. NaCl concentration improved copper adsorption at low pH. Formate reduced copper adsorption while benzoate improved the adsorption under low pH conditions. CONCLUSIONS Here, GO performed Cu(II) adsorption well. The external conditions have different influences on the adsorption process. Experimental results demonstrate that GO is a promising alternative material for pollutants removal. © 2018 Society of Chemical Industry