Fractionations of rare earth elements (REEs) and the forming mechanisms in plants were studied using Triticum aestivum as plant material with application of exogenous REEs and hydroponic culture. REEs were significantly fractionated in different parts of Triticum aestivum. M-type tetrad effect could be observed in both root and shoot of Triticum aestivum, which might result from the different abilities of REEs to form phosphate precipitation. Middle REEs (MREEs), light REEs (LREEs) and heavy REEs (HREEs) were enriched in root, stem and leaf of Triticum aestivum, respectively. REE speciation calculations using VMINTEQ program show REEs in simulated xylem solution mainly exist as REE-EDTA- and RE3+, but only HREEs are enriched in REE-EDTA-, while LREEs are enriched in the other REE species. It is suggested that the fractionation between LREEs and HREEs might be caused by the uptake of REE-EDTA- in Triticum aestivum leaves, but might result from the uptake of the other REE species in their stems.
参考文献
| [1] | Shabani M B;Akagi T;Shhimizu H et al.Determination of trace lanthanides and yttrium in seawater by Inductebely coupled plasma mass spectrometry after preconcentration with solvent extraction and back-extraction[J].Analytical Chemistry,1990,62:2709. |
| [2] | 王立军,梁涛,丁士明,张朝生,张国梁,王秀丽.Biogeochemical Cycle and Residue of Extraneous Rare Earth Elements in Agricultural Ecosystem[J].稀土学报（英文版）,2004(05):701-706. |
| [3] | Zhang S;Wang L J;Zhang C S.Neutron Activation Analysis Technology and Rare Earth Elements Environmental Biogeochemistry[A].A-energy press of China,1994:199. |
| [4] | 丁士明,梁涛,张自立,孙琴,张朝生.Effect of Rare Earths on Fractionation and Transformation of Soil Available Nitrogen[J].稀土学报(英文版),2003(05):582-586. |
| [5] | WEI Z G;Yin M;Zhang X et al.Rare earth elements in naturally grown fern Dicranopteris linearis in relation to their variation in South-Jiangxi region[J].Environmental Pollution,2001,114:345. |
| [6] | Wyttenbach A;Furrer V;Schleppi P;Tobler L .Rare earth elements in soil and in soil-grown plants[J].Plant and Soil,1998(2):267-273. |
| [7] | 张智勇,李福亮,王玉琦,肖海清,柴之芳.土壤-植物体系稀土元素的分异现象[J].中国稀土学报,2002(01):94-96. |
| [8] | Zhang Z Y;Wang Y Q;Sun J X et al.Research of rare earth elements in protoplasm using NAA analysis[J].Chinese Science Bulletin,2000,45(05):502. |
| [9] | 丁士明,梁涛,王立军,孙琴.稀土元素在土壤-小麦体系中的迁移和分馏特征[J].农业环境科学学报,2003(05):519-523. |
| [10] | Xu XK.;Zhu WZ.;Wang ZJ.;Witkamp GJ. .Distributions of rare earths and heavy metals in field-grown maize after application of rare earth-containing fertilizer[J].Science of the Total Environment,2002(1/3):97-105. |
| [11] | Fu FF;Akagi T;Yabuki S;Iwaki M .The variation of REE (rare earth elements) patterns in soil-grown plants:a new proxy for the source of rare earth elements and silicon in plants[J].Plant and Soil,2001(1):53-64. |
| [12] | FU F F;Tasuku A .Distribution of rare earth elements in seaweed: implication of two different soruces of rare earth elements and silicon in seaweed[J].Journal of Philosophy,2000,36:62. |
| [13] | Wyttenbach A;Patrik S;Jurg B et al.The accumulation of the rare earath elements and of Scandium in successive needle age classes of Norway Spruce[J].Biological Trace Element Research,1994,41:29. |
| [14] | Henderson P.Rare Earth Element Geochemistry[M].Amsterdam:Elsevier Press,1984 |
| [15] | Johannesson H K;Lyons W B;Yelken M.A et al.Geochemistry of the rare-earth elements in hypersaline and dilute acidic natural terrestrial waters: complexation behavior and middle rare-earth element enrichments[J].Chemical Geology,1996,133:133,125. |
| [16] | Johannesson H K;Zhou X P .Origin of middle rare earth elements enrichments in acid waters of a Canadian High Arctic lake[J].Geochimica et Cosmochimica Acta,1999,63:153. |
| [17] | Hannigan RE.;Sholkovitz ER. .The development of middle rare earth element enrichments in freshwaters: weathering of phosphate minerals[J].Chemical geology,2001(3-4):495-508. |
| [18] | Byrne RH.;Schijf J.;Liu XW. .THE INFLUENCE OF PHOSPHATE COPRECIPITATION ON RARE EARTH DISTRIBUTIONS IN NATURAL WATERS[J].Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society,1996(17):3341-3346. |
| [19] | Diatloff E;Asher C J;Smith F w .Use of Geochem-PC to predict rare earth element (REE) species in nutrient solutions[J].Plant and Soil,1993,155/156:251. |
| [20] | Peppard D F;Mason G W;Lewey S .A tetrad effect in the liquid-liquid extraction ordering of lanthanides (Ⅲ)[J].Journal of Radioanalytical and Nuclear Chemistry,1969,31:2271. |
| [21] | Akagi T;Shabai M B;Masuda A .Lanthanide tetrad efect in kimuraite[CaY2(CO3)4 · 6H2O]:implication for a new geochemical index[J].Geochimica et Cosmochimica Acta,1993,57:2899. |
| [22] | Liu C Q;Wu J H;Yu W H .Controls of interactions between iron hydroxide colloid and water on REE fractionations in surface waters: Experimental study on pH-controlling mechanism[J].Science in China Ser D,2001,31(10):873. |
| [23] | Masuda A;Ikeuchi Y .Lanthanide tetrad effect observed in marine environment[J].Geochemical Journal,1979,13:19. |
| [24] | BROWN D S;Allison J D.MINTEQA2: A geochemical assessment model for environmental system[M].User's manual 1990EPA Athens Geogia,1990 |
| [25] | Millero F J .Stability constants for the formation of rare earth inorganic complexes as a function of ionic strength[J].Geochimica et Cosmochimica Acta,1992,56:3123. |
| [26] | Lee J H;Byrne R H .Examination of comparative rare earth element complexation behavior using linear free-energy relationships[J].Geochimica et Cosmochimica Acta,1992,56:1127. |
| [27] | Byrne R H;Li B Q .Comparative complexation behavior of the rare earth[J].Geochimica et Cosmochimica Acta,1995,59(22):4575. |
| [28] | Wood S A .The arueous geochemistry of the rare-earth elements and yttrium.ⅠReview of available low-temperature data for inorganic complexes and the inorganic REE speciation of natural waters[J].Chemical Geology,1990,82:159. |
| [29] | SUN HAO;WANG XIAORONG;WANG QIN .THE EFFECTS OF CHEMICAL SPECIES ON BIOACCUMULATION OF RARE EARTH ELEMENTS IN RICE GROWN IN NUTRIENT SOLUTION[J].Toxicological and environmental chemistry,1999(1/2):75-85. |
| [30] | Marschner H.Mineral Nutrition of Higher Plants[M].Cambridge Acadimic Press,1995 |
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