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Adsorption of emerging contaminant metformin using graphene oxide

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WOS被引频次:17
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成果类型:
期刊论文
作者:
Zhu, Shuai;Liu, Yun-Guo;Liu, Shao-Bo;Zeng, Guang-Ming;Jiang, Lu-Hua;Tan, Xiao-Fei;Zhou, Lu;Zeng, Wei;Li, Ting-Ting;Yang, Chun-Ping
通讯作者:
Liu, Yun-guo;Liu, Shao-bo
作者机构:
[Zhou, Lu; Zeng, Wei; Jiang, Lu-Hua; Liu, Yun-Guo; Zhu, Shuai; Yang, Chun-Ping; Tan, Xiao-Fei; Li, Ting-Ting; Zeng, Guang-Ming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Zhou, Lu; Zeng, Wei; Jiang, Lu-Hua; Liu, Yun-Guo; Zhu, Shuai; Yang, Chun-Ping; Tan, Xiao-Fei; Li, Ting-Ting; Zeng, Guang-Ming] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.
[Liu, Shao-Bo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
[Liu, Shao-Bo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.
通讯机构:
[Liu, Yun-guo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Liu, Shao-bo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
Emerging contaminants;Pharmaceutical;Metformin;Graphene oxide;Adsorption
期刊:
Chemosphere
ISSN:
0045-6535
年:
2017
卷:
179
页码:
20-28
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:环境科学/生态学;WOS学科类别:Environmental Sciences
入藏号:
WOS:000401385900003;EI:20171303507582
基金类别:
National Natural Science Foundation of China [41271332, 51521006]; International S&T Cooperation Program of China [2015DFG92750]
机构署名:
本校为通讯机构
院系归属:
冶金与环境学院
建筑与艺术学院
摘要:
The occurrence of emerging contaminants in our water resources poses potential threats to the livings. Due to the poor treatment in wastewater management, treatment technologies are needed to effectively remove these products for living organism safety. In this study, Graphene oxide (GO) was tested for the first time for its capacity to remove a kind of emerging wastewater contaminants, metformin. The research was conducted by using a series of systematic adsorption and kinetic experiments. The results indicated that GO could rapidly and efficiently reduce the concentration of metformin, which could provide a solution in handling this problem. The uptake of metformin on the graphene oxide was strongly dependent on temperature, pH, ionic strength, and background electrolyte. The adsorption kinetic experiments revealed that almost 80% removal of metformin was achieved within 20&nbsp;min for all the doses studied, corresponding to the relatively high k<inf>1</inf>(0.232&nbsp;min<sup>&minus;1</sup>) and k<inf>2</inf>(0.007&nbsp;g&nbsp;mg<sup>&minus;1</sup>&nbsp;min<sup>&minus;1</sup>) values in the kinetic models. It indicated that the highest adsorption capacity in the investigated range (q<inf>m</inf>) of GO for metformin was at pH 6.0 and 288&nbsp;K. Thermodynamic study indicated that the adsorption was a spontaneous (&Delta;G<sup>0</sup>&nbsp;&lt;&nbsp;0) and exothermic (&Delta;H<sup>0</sup>&nbsp;&lt;&nbsp;0) process. The adsorption of metformin increased when the pH values changed from 4.0 to 6.0, and decreased adsorption were observed at pH 6.0&ndash;11.0. GO still exhibited excellent adsorption capacity after several desorption/adsorption cycles. Besides, both so-called &pi;&ndash;&pi;interactions and hydrogen bonds might be mainly responsible for the adsorption of metformin onto GO. &copy;2017 Elsevier Ltd
参考文献:
Blair BD, 2013, SCI TOTAL ENVIRON, V444, P515, DOI 10.1016/j.scitotenv.2012.11.103
Chang HX, 2013, ENERG ENVIRON SCI, V6, P3483, DOI 10.1039/c3ee42518e
Crago J, 2016, GEN COMP ENDOCR, V232, P185, DOI 10.1016/j.ygcen.2015.12.030
Cui H, 2016, J HAZARD MATER, V308, P355, DOI 10.1016/j.jhazmat.2016.01.054
Escher BI, 2011, WATER RES, V45, P75, DOI 10.1016/j.watres.2010.08.019

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