|
| Effects of clay mineral colloids on the transport of graphene oxide and As（Ⅴ）in porous media |
| Received:March 25, 2020 |
| View Full Text View/Add Comment Download reader |
| KeyWord:graphene oxide;kaolinite;montmorillonite;As(Ⅴ);transport |
| Author Name | Affiliation | | MENG Qing-tao | Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
University of Chinese Academy of Sciences, Beijing 100049, China
College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China | | ZHOU Shi | College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China | | JIANG Yan-ji | College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China | | YIN Xian-qiang | College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China |
|
| Hits: 1533 |
| Download times: 1386 |
| Abstract: |
| To investigate the role of immobile clay mineral colloids on the migration of graphene oxide(GO)and arsenic in porous media, a series of column experiments were conducted to study the migration behavior of GO, As(Ⅴ), and GO-As(Ⅴ)through different clay mineral colloids(kaolinite and montmorillonite), as well as their pH, ionic strength(IS), and flow rate. The results show that increasing the flow rate will increase the mobility of GO and As(Ⅴ)in saturated porous media; increasing the IS will decrease the mobility of GO and As(Ⅴ)in saturated porous media; and increasing pH will also increase the mobility of GO and As(Ⅴ)in the same. In addition, the mobility of both GO and As(Ⅴ)increased when their movements were coordinated, compared to individual movements. Immovable montmorillonite colloids have a greater ability to block GO and As(Ⅴ)than compared with kaolinite colloids. The reason may be that the presence of cations in the montmorillonite layers provide a greater positive charge. This study clarifies the effect of clay minerals on the fate of GO and As (Ⅴ)in soil. |
|
|
|
