Full
Outline
3-aminopropyltriethoxysilane (KH550) was used to modify Fh, yielding organosilane-modified ferrihydrite (KH-Fh). The Pb(Ⅱ) adsorption performance and underlying mechanisms of KH-Fh were systematically explored.Results demonstrate that the modification successfully introduced Si-OH and -NH2 functional groups onto the Fh surface, enhancing the maximum adsorption capacity from 50.51mg/g of the unmodified Fh to 102.85mg/g of KH-Fh, representing a 103.6% increase. Adsorption kinetics and isotherm studies indicate that the adsorption processes of both Fh and KH-Fh for Pb(Ⅱ) conform to the pseudo-second-order kinetic model and the Langmuir isotherm model, suggesting that chemisorption is the dominant mechanism. The positive value of the thermodynamic parameter ΔH indicates that elevated temperatures promote the adsorption reaction. Compared with unmodified Fh, KH-Fh maintains higher and more stable adsorption efficiency across a wide pH range (3.0~7.0) and is less affected by ionic strength and common coexisting ions (Na+, K+, Ca2+). X-ray photoelectron spectroscopy (XPS) analysis confirms that Pb(Ⅱ) is immobilized through coordination with Si-OH, Fe-OH, and -NH2 functional groups on the surface of KH-Fh, significantly enhancing the adsorption stability. These results offer novel theoretical insights and practical guidance for the functional modification of iron oxides and the remediation of Pb(Ⅱ)-contaminated environments.
66
18
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
