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Preparation of Polyethyleneimine/Magnetic Biochar Composites and Its Removal Properties for Cr(Ⅵ)
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Ye ZHANG, Bowen ZHANG, Xiaogang HE, Wenfei WU, Bo FENG, Lifeng ZHAO
Hydrometallurgy of China | 2024, 43(6) : 689 - 696
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Hydrometallurgy of China | 2024, 43(6): 689-696
• Experiment Research •
Preparation of Polyethyleneimine/Magnetic Biochar Composites and Its Removal Properties for Cr(Ⅵ)
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Ye ZHANG, Bowen ZHANG, Xiaogang HE, Wenfei WU, Bo FENG, Lifeng ZHAO
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  • College of Chemical and Environmental Sciences, Kashi University, Kashi 844000, China
Published: 2024-12-20 doi: 10.13355/j.cnki.sfyj.2024.06.014
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In order to develop a high efficiency, environmental protection, low energy consumption of heavy metal Cr (Ⅵ) adsorbent magnetic biochar (MBC) was obtained by co-precipitation reaction in a mixture of FeSO4·7H2O and FeCl3·6H2O with alkali modified biochar as the substrate. polyethyleneimine(PEI) was then used as an amination agent and glutaraldehyde was as a cross-linking agent to produce PEI-functionalized magnetic biochar composites(PEI/MBC) for Cr(Ⅵ) removal, PEI/MBC was characterized by SEM,XRD and FT-IR. The effects of solution pH, adsorbent dosage and competitive ions on the adsorption properties for Cr(Ⅵ) were investigated,the results show that the highest adsorption amount of 105.94 mg/g is achieved under the conditions of initial Cr(Ⅵ) concentration of 50 mg/L, an adsorbent dosage of 0.2 g/L, temperature of 30 ℃ and pH=2. The adsorption was affected by the changes of competitive anions and temperature, the quasi-second-order kinetic equation can well reflect the adsorption behavior of Cr(Ⅵ) on PEI/MBC, and the isothermal adsorption data is consistent with the Freundlich isothermal adsorption model, the adsorption of Cr(Ⅵ) is a spontaneous endothermic process, with ΔG<0, ΔS=144.82 J/(mol·K) and ΔH=39.84 kJ/mol.

Cr(Ⅵ)  /  biochar  /  adsorption  /  adsorbent  /  polyethyleneimine  /  magnetic  /  composites material
Ye ZHANG, Bowen ZHANG, Xiaogang HE, Wenfei WU, Bo FENG, Lifeng ZHAO. Preparation of Polyethyleneimine/Magnetic Biochar Composites and Its Removal Properties for Cr(Ⅵ)[J]. Hydrometallurgy of China, 2024 , 43 (6) : 689 -696 . DOI: 10.13355/j.cnki.sfyj.2024.06.014
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Year 2024 volume 43 Issue 6
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doi: 10.13355/j.cnki.sfyj.2024.06.014
  • Receive Date：2024-05-05
  • Online Date：2025-09-10
  • Published：2024-12-20
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  • Received：2024-05-05
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    College of Chemical and Environmental Sciences, Kashi University, Kashi 844000, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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