Water-enhanced Removal of Ciprofloxacin from Water by Porous Graphene Hydrogel.
An environmentally benign and efficient hydrothermal reduction method was applied for the preparation of three-dimensional (3D) porous graphene hydrogel (GH) adsorbents. The physicochemical properties of GH granules were systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectra and Brunauer-Emmett-Teller (BET) method. GH granules showed an excellent adsorption capacity (235.6 mg/g) for ciprofloxacin via combined adsorption interaction mechanisms (e.g. π-π EDA interaction, hydrogen bonding, and hydrophobic interaction). Moreover, reducing the size of the hydrogels can significantly accelerate the adsorption process and enhance the removal efficiency of pollutants from aqueous solution. Water (more than 99 wt%) within hydrogels played a key role in enhancing adsorption performance. The GO hydrogels exhibited an excellent adaptability to environmental factors. These findings demonstrate that GH granules are promising adsorbents for the removal of antibiotic pollutants from aqueous solutions.
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. of China.
Jie
J
Ma
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. of China.
Mingxuan
M
Yang
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. of China.|College of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai 2001418, China.
Fei
F
Yu
Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio, USA 44325.
Jie
J
Zheng
D065966:Absorption, Physicochemical; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification; D002939:Ciprofloxacin / Q000737:chemistry / Q000302:isolation & purification*; D006108:Graphite / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D058608:Nanopores / Q000648:ultrastructure; D016062:Porosity; D014462:Ultrafiltration / Q000379:methods*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D000900:Anti-Bacterial Agents; D020100:Hydrogels; D014874:Water Pollutants, Chemical; D014867:Water; D002939:Ciprofloxacin; D006108:Graphite