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result sql = Temperature-dependent magnesium citrate modified formation of MgO nanoparticles biochar composites with efficient phosphate removal.
Temperature-dependent magnesium citrate modified formation of MgO nanoparticles biochar composites with efficient phosphate removal.
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result sql = Nano-MgO biochar composites (nMBCs) have been considered as potential adsorbents for phosphate removal from aqueous solution. It is an effective strategy to improve P removal efficiency that adjustment of the size, distribution and crystallinity of MgO particles embedded into the carbon matrix. Herein, we prepared a highly efficient phosphate adsorbent by co-pyrolysis of lotus seedpod and magnesium citrate and studied its adsorption mechanisms. Results showed that the uniformly dispersed MgO nanoparticle was formed on the surface of nMBCs with the temperature increasing, with the particles size ranging from 3 to 10 nm. Furthermore, high temperature promoted the formation of a large amount of reactive lattice oxygen, which was demonstrated to be the main active adsorption site, thus the phosphate immobilization capacity of nMBCs was greatly improved with the pyrolysis temperature increasing from 450 °C to 750 °C. Besides, some stable CO bonds were formed due to the catalysis of Mg2+, which could bond to HPO42-/H2PO4- by hydrogen bond, enhancing the adsorption performance. The isotherm adsorption experiment showed that MBC-750 achieved an excellent phosphorus adsorption amount of 452.752 mg-P/g. The effectiveness of nMBCs is enhanced and a method for producing an effective nanocomposite adsorbent material for removing phosphate from wastewater is provided.


Publication: Chemosphere 2021 Jul;274():129904.
Publication Date: Jul 2021
Study Author(s): Zhu Danchen D ; Yang Haiping H ; Chen Xu X ; Chen Wei W ; Cai Ning N ; Chen Yingquan Y ; Zhang Shihong S ; Chen Hanping H ;
Institution: State Key Laboratory of Coal Combustion, School of Power and Energy Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China.
Shortcut link to this study:
Nano-MgO biochar composites (nMBCs) have been considered as potential adsorbents for phosphate removal from aqueous solution. It is an effective strategy to improve P removal efficiency that adjustment of the size, distribution and crystallinity of MgO particles embedded into the carbon matrix. Herein, we prepared a highly efficient phosphate adsorbent by co-pyrolysis of lotus seedpod and magnesium citrate and studied its adsorption mechanisms. Results showed that the uniformly dispersed MgO nanoparticle was formed on the surface of nMBCs with the temperature increasing, with the particles size ranging from 3 to 10 nm. Furthermore, high temperature promoted the formation of a large amount of reactive lattice oxygen, which was demonstrated to be the main active adsorption site, thus the phosphate immobilization capacity of nMBCs was greatly improved with the pyrolysis temperature increasing from 450 °C to 750 °C. Besides, some stable CO bonds were formed due to the catalysis of Mg2+, which could bond to HPO42-/H2PO4- by hydrogen bond, enhancing the adsorption performance. The isotherm adsorption experiment showed that MBC-750 achieved an excellent phosphorus adsorption amount of 452.752 mg-P/g. The effectiveness of nMBCs is enhanced and a method for producing an effective nanocomposite adsorbent material for removing phosphate from wastewater is provided.

PMID: 33979927

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