Journal
RSC ADVANCES
Volume 9, Issue 43, Pages 24760-24769Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra03374b
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Funding
- National Natural Science Foundation of China [41771513, 51704121, 41001316, 51108262]
- Major Science and Technology Program for Water Pollution Control and Treatment in China [2017ZX07202006]
- Shanghai Pujiang Program [16PJ1404800]
- National Key R&D Program of China [2018YFC1901000]
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Long-root Eichhornia crassipes has shown great potential in eutrophication treatments while the heavy disposal of its plants limits its large-scale application. In this study, the adsorption of TBBPA by a novel multi-group activated carbon (MGAC), prepared from the reaped long-root Eichhornia crassipes plants has been investigated as a potential recycling and remediation technology. The MGAC showed great adsorption performance for aqueous TBBPA in that the adsorption could arrive at equilibrium in 4 h and the saturated adsorption capacities could reach up to 110.7, 110.5 and 75.50 mg g(-1) at 20, 30 and 40 degrees C, respectively. Based on the analysis of adsorption processes, it was confirmed that pi-pi interaction and hydrogen bonding were the major impetuses for the adsorption and the oxygen-containing functional groups on the MGAC surface could facilitate the adsorption by either electron sharing or electron transfer. In addition, the thermodynamic results showed that the adsorption was a spontaneous and exothermic reaction. Futhermore, the MGAC could be regenerated easily by 5% NaOH solution and retained over 50% of its initial capacities for TBBPA after 5 reprocessing cycles. These results indicate the promising application of MGAC in the wastewater treatment for TBBPA removal and a resource recycling method for the long-root Eichhornia crassipes plants.
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