title: The effect of U speciation in cultivation solution on the uptake of U by variant Sedum alfredii.
abstract: In the present study, five plant species were screened for uranium uptake using a hydroponic experimental set-up. The effect of the U concentration, pH, as well as the presence of carbonates, phosphates, and organic acids (lactic acid, malic acid, citric acid) on the uptake of U by variant S. alfredii (V S. alfredii) and wild S. alfredii (W S. alfredii) were investigated. Results showed that V S. alfredii exhibited higher U content in the roots than the other four plants and with the increase of U concentration in the solution, the U uptake by V S. alfredii and W S. alfredii increased. The results also showed that different U speciation in different cultivation solution took an important role on the uptake of U in variant Sedum alfredii: at pH 6.5, U hydrolysis species (UO2)3(OH)5 (+)is predominant and the U concentrations in V S. alfredii roots reached a maximum value (3.7 × 10(4) mg/kg). U complexation with carbonates, phosphates, and some organic acids in the solution resulted in a decrease in the U content in the roots except for lactic acid. Our researches highlight the correlations between U speciation and the uptake on V S. Alfredii, which will be helpful for improved removal of U from the groundwater using phytoremediation method.
authors: Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, China.
authors: Liang
authors: L
authors: Du
authors: Logistic Engineering University, Chongqing, 401311, China.
authors: Xiaojie
authors: X
authors: Feng
authors: College of Chemistry, Sichuan University, Chengdu, 610064, China.
authors: Zhenling
authors: Z
authors: Huang
authors: College of Chemistry, Sichuan University, Chengdu, 610064, China.
authors: Borui
authors: B
authors: Liu
authors: College of Chemistry, Sichuan University, Chengdu, 610064, China.
authors: Yongdong
authors: Y
authors: Jin
authors: Logistic Engineering University, Chongqing, 401311, China.
authors: Zhenggang
authors: Z
authors: Fang
authors: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, People's Republic of China.
authors: Dong
authors: D
authors: Zhang
authors: Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, China. nliu720@scu.edu.cn.
authors: Ning
authors: N
authors: Liu
authors: State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China. rwang@umac.mo.
authors: Ruibing
authors: R
authors: Wang
authors: Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, China. xiachqin@163.com.|College of Chemistry, Sichuan University, Chengdu, 610064, China. xiachqin@163.com.
authors: Chuanqin
authors: C
authors: Xia
mesh_terms: D001673:Biodegradation, Environmental; D002254:Carbonates / Q000737:chemistry; D019343:Citric Acid / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000737:chemistry; D008293:Malates / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D018517:Plant Roots / Q000378:metabolism*; D031963:Sedum / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D014501:Uranium / Q000032:analysis / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D002254:Carbonates; D008293:Malates; D010710:Phosphates; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D019343:Citric Acid; D019344:Lactic Acid; D014501:Uranium; C030298:malic acid
keywords: Phytoremediation; Uranium; variant S.alfredii