H3PO4 activated biochars derived from different agricultural biomasses for the removal of ciprofloxacin from aqueous solution |
| |
| Affiliation: | 1. Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, East China University of Technology, Nanchang, 330013, China;2. Department of Pharmacy, National University of Singapore, 117544, Singapore;3. National Energy Research and Development Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, China;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China;2. China Kunlun Contracting & Engineering Co, Ltd, Beijing, 100037, China;1. College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475000, China;2. Nanomaterial Engineering Research Center, Henan University, Kaifeng, 475000, China;3. Department of State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;2. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China;3. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China;1. School of Geography and the Environment, Liaocheng University, Liaocheng, 252000, China;2. Key Lab of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, 200241, China;3. State Key Laboratory of Loess and Quaternary Geology, Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an, 710075, China;1. Department of Chemical Engineering, Indian Institute of Technology Delhi, New Delhi, 110016, India;2. NTPC Energy Technology Research Alliance, Greater Noida, 201306, India |
| |
| Abstract: | Biochars were prepared by the pyrolysis of various H3PO4 activated agricultural biomasses at 600 °C and subsequently used as adsorbents for the removal of ciprofloxacin (CIP) from aqueous solution. Peanut shell-based biochar (PSBC), corncob-based biochar (CCBC) and cotton-based biochar (CTBC) had high surface areas (571.0–1006.3 m2/g), well-developed pore structures (mesopores with large pore volumes) and available adsorption functional groups (C=C, C–N and C–O–C). The CIP adsorption onto the biochars was investigated by batch experiments (kinetics, isotherms, thermodynamics, pH, etc.). Thermodynamics calculations showed the spontaneous (ΔGθ<0) and endothermic (ΔHθ>0) nature of the mechanism. In particular, CCBC exhibited high adsorption capacity (120.6 mg/g) of CIP in real lake water and it also had significant removal efficiency of other common pharmaceutical contaminants from real lake environment, and even in a coexisting quintuple system. Finally, multiple interaction mechanisms of CIP adsorption onto aromatized biochar were explored combining characterization analysis and theoretical calculations. Elucidation of the mechanism of CIP adsorption onto biochar provides new insights into the assessment of the removal of pharmaceuticals from the aqueous environment. |
| |
| Keywords: | Biochar Adsorption Pharmaceutical contaminants Ciprofloxacin Water remediation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
