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| Effects of graphene oxide on transport of lead in saturated porous media |
| Received:January 13, 2016 |
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| KeyWord:graphene oxide;lead;porous media;transport;release |
| Author Name | Affiliation | E-mail | | CHEN Ya-ni | Department of Hydrosciences, Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Nanjing 210023, China | | | DONG Shu-nan | Department of Hydrosciences, Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Nanjing 210023, China | | | SUN Yuan-yuan | Department of Hydrosciences, Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Nanjing 210023, China | jcwu@nju.deu.cn | | SHI Xiao-qing | Department of Hydrosciences, Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Nanjing 210023, China | | | XU Hong-xia | Department of Hydrosciences, Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Nanjing 210023, China | | | WU Ji-chun | Department of Hydrosciences, Key Laboratory of Surficial Geochemistry, Ministry of Education, Nanjing University, Nanjing 210023, China | |
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| Abstract: |
| Graphene oxide (GO) is a new nanomaterial rich in active functional sites, and may greatly influence heavy metal movements in the media. In this study, the effects of GO on lead[Pb (Ⅱ) ] transport in saturated porous media were investigated. Batch experiments showed that GO had high adsorption capacity of Pb (Ⅱ), compared with quartz sand. In saturated porous media, GO showed high mobility. However, the presence of Pb (Ⅱ) reduced the GO mobility. By contrast, Pb (Ⅱ) mobility was very low, but was promoted by GO. Lead (Ⅱ) preloaded in sand column was effectively mobilized by GO solution. The released Pb (Ⅱ) was significantly correlated with GO inputs (R2 >0.95). In summary, Pb reduced GO mobility, whereas GO promoted Pb transport in saturated porous media. |
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