Comparative study of raw and HNO3-modified porous carbon from waste printed circuit boards for sulfadiazine adsorption: Experiment and DFT study |
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| Institution: | 1. School of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China;2. Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Ji’nan 250353, China;3. Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;4. Environment Research Institute, Shandong University, Qingdao 266237, China;1. School of Pharmacy and Pharmaceutical Science & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, NHC Key Laboratory of biotechnology drug (Shandong Academy of Medical Sciences), Key Lab for Rare & Uncommon Diseases of Shandong Province, Ji''nan 250117, China;2. School of Chemistry and Chemical Engineering, Shandong University, Ji''nan 250100, China;1. Department of Environmental Science and Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Research Institute of Xi''an Jiaotong University, Hangzhou 311200, China;1. Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai 201203, China;2. The Institutes of Integrative Medicine of Fudan University, Shanghai 200040, China;3. Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China;1. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China;2. State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen 361102, China;1. Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Shunde Graduate School of University of Science and Technology Beijing, Foshan 528399, China;3. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China |
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| Abstract: | A huge amount of waste printed circuit boards (WPCBs) was produced while the electronic manufacturing industry developed rapidly. WPCBs mainly consist of organic compounds, which makes it possible to prepare them into porous carbon as valuable adsorbent. However, WPCBs are also rich in valuable metals. Cu makes up the most of these metals. It is worth studying whether the residual metal will affect the application of carbon materials. In this study, the porous active carbon (AC) was prepared from WPCBs as an adsorbent. Sulfadiazine (SD), a widely detected antibiotic contaminant, was used as a target pollutant. Nitric acid (HNO3) was used to modify AC (AC-HNO3) to remove the residual Cu. The experiment results showed that the adsorption kinetics of SD by AC (k = 0.0025) and AC-HNO3 (k = 0.0029) can be described better using a pseudo-second-order kinetic equation. The adsorption isotherms of AC and AC-HNO3 on SD could be fitted by the Langmuir model. AC had a larger adsorption capacity than AC-HNO3. Density functional theory (DFT) calculation results suggested that the −OH group and Cu on the surface of AC could be the adsorption sites and promote the SD adsorption. This work provides practical methods to recycle WPCBs into wealth and realized waste control by waste. |
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