Home > Publications database > Influence of biochar incorporation on the collector surface properties and the transport of silver nanoparticles in porous media > print

001     1006864
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024 7 _ |a 10.1016/j.jenvman.2022.116943
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024 7 _ |a 1095-8630
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024 7 _ |a 10.34734/FZJ-2023-01906
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100 1 _ |a Yun, Jinhu
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245 _ _ |a Influence of biochar incorporation on the collector surface properties and the transport of silver nanoparticles in porous media
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a Biochar is widely used as a soil amendment due to its environmental friendliness and convenient availability. It is believed that the presence of biochar in porous media can influence the transport of colloidal and solute contaminants. In this study, different mass ratios of biochar were added to packed sand with a rough or smooth surface to determine the significance of biochar on the retention and release of silver nanoparticles (AgNPs). The results showed that biochar reduced the transport of AgNPs in rough and smooth sands under different solution conditions. A small amount of biochar (0.1–1% in mass percentage) can significantly enhance the retention of AgNPs due to the alteration in collector surface roughness and chemical heterogeneity that potentially reduce the energy barrier for retention. Furthermore, the retention of AgNPs in rough sand was always higher than that in smooth sand under the same experimental conditions. The presence of biochar also produced nonmonotonic retention of AgNPs mainly due to the changes in collector surface roughness. Additionally, the AgNPs retention associated with biochar tended to be irreversible due to the charge heterogeneity, while the reversible retention could mainly occur on a rough sand surface via shallow primary minima. This work highlights the significance of collector surface roughness that needs to be considered in the process of biochar amendment for practical applications to effectively immobilize colloidal contaminants in soil or groundwater.
536 _ _ |a 2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217)
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700 1 _ |a Liang, Yan
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700 1 _ |a Muhammad, Yaseen
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700 1 _ |a Liu, Fei
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700 1 _ |a Dong, Yawen
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700 1 _ |a Wang, Shuangfei
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773 _ _ |a 10.1016/j.jenvman.2022.116943
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|t Journal of environmental management
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|y 2023
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856 4 _ |y Restricted
|u https://juser.fz-juelich.de/record/1006864/files/2023-Influence%20of%20biochar%20incorporation%20on%20the%20collector%20surface%20properties%20and%20the%20transport%20of%20silver%20nanoparticles%20in%20porous%20media.pdf
856 4 _ |y Published on 2022-12-12. Available in OpenAccess from 2024-12-12.
|u https://juser.fz-juelich.de/record/1006864/files/JEMA-D-22-09985_R1.pdf
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