Enhancing biochar adsorption capabilities and recollection ability is essential for efficient biochar application. In this study, Nitrogen-doped magnetic biochar was prepared via one-step heating of FeCl-laden agar biomass under NH environment. Synthesized magnetic biochar ABF-N shows a maximum Cr (VI) adsorption capacity up to 142.86 mg g, outperforming that of magnetic biochar and many other previously reported materials. Moreover, a significant increase of magnetic properties obtained by NH ambiance pyrolysis enables easy separation of the adsorbent from the solution after treated with Cr (VI). The physiochemical properties of composites characterized by SEM, EDS, XRD, XPS, VSM, BET surface and pore, Elemental content, and FTIR analysis. The NH ambiance pyrolysis confirmed as an efficient process for surface modification, increased magnetic properties and activated N-functional groups. The Langmuir isotherm model and pseudo-second-order model are applicable for describing adsorption behavior. The thermodynamic study shows that the adsorption was spontaneous and endothermic. The present results warrant the application of simultaneous functionalized and magnetized biochar for Cr (VI) contaminated wastewater treatment.
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http://dx.doi.org/10.1016/j.chemosphere.2018.06.021 | DOI Listing |
J Environ Sci (China)
March 2023
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Wuppertal 42285, Germany; Department of Environment, Energy and Geoinformatics, Sejong University, Guangjin-Gu, Seoul 05006, South Korea. Electronic address:
Herein, a one-step co-pyrolysis protocol was adopted for the first time to prepare a novel pyrogenic carbon-Cu/FeO heteroatoms (FCBC) in CO ambiance to discern the roles of each component in PDS activation. During co-pyrolysis, CO catalyzed formation of reducing gases by biomass which facilitated reductive transformation of Fe and Cu to Cu and FeO, respectively. According to the analysis, the resulting metal (oxide) catalyzed graphitization of biocharand decomposition of volatile substances resulting in an unprecedented surface area (1240 mg).
View Article and Find Full Text PDFJ Environ Sci (China)
April 2019
CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi 710075, China.
A series of new biochar-supported composite based on the combination of biochar and metallic nanoparticles (NPs) were produced through single-step pyrolysis of FeCl-Ti(OBu) laden agar biomass under NH environment. The physiochemical properties of composites were characterized thoroughly. It has found that heating temperature and N-doping through NH-ambiance pyrolysis significantly influence the visible-light sensitivity and bandgap energy of composites.
View Article and Find Full Text PDFChemosphere
October 2018
CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China.
Enhancing biochar adsorption capabilities and recollection ability is essential for efficient biochar application. In this study, Nitrogen-doped magnetic biochar was prepared via one-step heating of FeCl-laden agar biomass under NH environment. Synthesized magnetic biochar ABF-N shows a maximum Cr (VI) adsorption capacity up to 142.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!