Uranium (VI) transport in saturated heterogeneous media: Influence of kaolinite and humic acid

Chen, Chong1; Zhao, Kang1; Shang, Jianying1; Liu, Chongxuan2; Wang, Jin3; Yan, Zhifeng4; Liu, Kesi5; Wu, Wenliang6

2018-09

10.1016/j.envpol.2018.04.095

ENVIRONMENTAL POLLUTION   影响因子和分区

0269-7491

1873-6424

Natural aquifers typically exhibit a variety of structural heterogeneities. However, the effect of mineral colloids and natural organic matter on the transport behavior of uranium (U) in saturated heterogeneous media are not totally understood. In this study, heterogeneous column experiments were conducted, and the constructed columns contained a fast-flow domain (FFD) and a slow-flow domain (SFD). The effect of kaolinite, humic acid (HA), and kaolinite/HA mixture on U(VI) retention and release in saturated heterogeneous media was examined. Media heterogeneity significantly influenced U fate and transport behavior in saturated subsurface environment. The presence of kaolinite, HA, and kaolinite/HA enhanced the mobility of U in heterogeneous media, and the mobility of U was the highest in the presence of kaolinite/HA and the lowest in the presence of kaolinite. In the presence of kaolinite, there was no difference in the amount of U released from the FFD and SFD. However, in the presence of HA and kaolinite/HA, a higher amount of U was released from the FFD. The findings in this study showed that medium structure and mineral colloids, as well as natural organic matter in the aqueous phase had significant effects on U transport and fate in subsurface environment. (C) 2018 Elsevier Ltd. All rights reserved.

Uranium (VI) Transport Heterogeneous medium Kaolinite Humic acid

SCI ; EI

英语

其他

National Key Research and Development Program[2017YFD0801503] ; National Key Research and Development Program[2016YFC0501902]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000438322100024

ELSEVIER SCI LTD

20182305288770

Aquifers ; Biogeochemistry ; Biological materials ; Colloids ; Groundwater flow ; Hydrogeology ; Kaolinite ; Organic acids

Groundwater:444.2 ; Biological Materials and Tissue Engineering:461.2 ; Geology:481.1 ; Geochemistry:481.2 ; Minerals:482.2 ; Biochemistry:801.2 ; Colloid Chemistry:801.3 ; Organic Compounds:804.1

ENVIRONMENT/ECOLOGY

Web of Science

1.China Agr Univ, Coll Resources & Environm Sci, Key Lab Plant Soil Interact,Minist Agr, Minist Educ,Key Lab Arable Land Conservat North C, Beijing 100193, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China
4.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
5.China Agr Univ, Dept Grassland Sci, Beijing 100193, Peoples R China
6.China Agr Univ, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

Chen, Chong,Zhao, Kang,Shang, Jianying,et al. Uranium (VI) transport in saturated heterogeneous media: Influence of kaolinite and humic acid[J]. ENVIRONMENTAL POLLUTION,2018,240:219-226.

Chen, Chong.,Zhao, Kang.,Shang, Jianying.,Liu, Chongxuan.,Wang, Jin.,...&Wu, Wenliang.(2018).Uranium (VI) transport in saturated heterogeneous media: Influence of kaolinite and humic acid.ENVIRONMENTAL POLLUTION,240,219-226.

Chen, Chong,et al."Uranium (VI) transport in saturated heterogeneous media: Influence of kaolinite and humic acid".ENVIRONMENTAL POLLUTION 240(2018):219-226.