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Rare earth elements in soil and plant systems - A review

Tyler, Germund LU (2004) In Plant and Soil 267(1-2). p.191-206
Abstract
The rare earth elements (REES) form a chemically uniform group and include yttrium (Y), lanthanum (La) and the lanthanides cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu). Their average abundance in the Earth's crust range from 66 mug g(-1) in Ce to 0.5 mug g(-1) in Tm and much less than0.1 mug g(-1) in Pm. Recent great improvements in more routine analytical technique, the use of REEs as fertilisers, at least in East Asian agriculture, and the importance of these elements as indicators in both pedological and physiological processes and reactions have contributed to an... (More)
The rare earth elements (REES) form a chemically uniform group and include yttrium (Y), lanthanum (La) and the lanthanides cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu). Their average abundance in the Earth's crust range from 66 mug g(-1) in Ce to 0.5 mug g(-1) in Tm and much less than0.1 mug g(-1) in Pm. Recent great improvements in more routine analytical technique, the use of REEs as fertilisers, at least in East Asian agriculture, and the importance of these elements as indicators in both pedological and physiological processes and reactions have contributed to an increased interest in these previously less considered elements in environmental sciences. This review of recent and current literature deals with REES in primary and secondary soil minerals, concentrations in surface soils, factors influencing adsorption, solubility and transport in soils. including weathering and transformations of REE minerals. and vertical distribution in soil profiles. Reviewed and discussed are also concentrations, distribution and localisation of REES in plants and plant organs, soil-plant relationships and interactions, effects on plant growth and crop production and their importance in plant physiology and biochemistry. The REEs are found. usually several elements together, as phosphates. carbonates and silicate minerals finely dispersed especially in magmatic and metamorphic rocks. REE concentrations in surface soils of humid climates, such as the A(E)-horizons of Podzols and Laterites. are usually lower than in the parent material, due to higher weathering and leaching rates than of the average soil constituents. Some fractionation may occur due to the formation of more element-specific secondary minerals. Transfer from soil to plant is usually low, but extreme accumulators are found, e.g., among several species of ferns. Roots have generally hi her concentrations than shoots. Possible uptake mechanisms of REES are discussed. Uptake is positively, though often weakly, correlated with soil acidity and easily soluble concentrations of the elements. but rarely well related to their total concentrations in the soil. Under certain conditions, low concentrations of at least some REES seem to favour plant growth and productivity, but the physiological mechanisms are still not well understood. Some considerations concerning, the boundary between essential and non-essential micro nutrients are discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Plant and Soil
volume
267
issue
1-2
pages
191 - 206
publisher
Springer
external identifiers
  • wos:000226444500017
  • scopus:14644440591
ISSN
0032-079X
DOI
10.1007/s11104-005-4888-2
language
English
LU publication?
yes
id
b152e620-266b-4679-b5bf-3edf70e98867 (old id 147118)
date added to LUP
2007-07-02 14:45:19
date last changed
2017-12-10 03:45:52
@article{b152e620-266b-4679-b5bf-3edf70e98867,
  abstract     = {The rare earth elements (REES) form a chemically uniform group and include yttrium (Y), lanthanum (La) and the lanthanides cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu). Their average abundance in the Earth's crust range from 66 mug g(-1) in Ce to 0.5 mug g(-1) in Tm and much less than0.1 mug g(-1) in Pm. Recent great improvements in more routine analytical technique, the use of REEs as fertilisers, at least in East Asian agriculture, and the importance of these elements as indicators in both pedological and physiological processes and reactions have contributed to an increased interest in these previously less considered elements in environmental sciences. This review of recent and current literature deals with REES in primary and secondary soil minerals, concentrations in surface soils, factors influencing adsorption, solubility and transport in soils. including weathering and transformations of REE minerals. and vertical distribution in soil profiles. Reviewed and discussed are also concentrations, distribution and localisation of REES in plants and plant organs, soil-plant relationships and interactions, effects on plant growth and crop production and their importance in plant physiology and biochemistry. The REEs are found. usually several elements together, as phosphates. carbonates and silicate minerals finely dispersed especially in magmatic and metamorphic rocks. REE concentrations in surface soils of humid climates, such as the A(E)-horizons of Podzols and Laterites. are usually lower than in the parent material, due to higher weathering and leaching rates than of the average soil constituents. Some fractionation may occur due to the formation of more element-specific secondary minerals. Transfer from soil to plant is usually low, but extreme accumulators are found, e.g., among several species of ferns. Roots have generally hi her concentrations than shoots. Possible uptake mechanisms of REES are discussed. Uptake is positively, though often weakly, correlated with soil acidity and easily soluble concentrations of the elements. but rarely well related to their total concentrations in the soil. Under certain conditions, low concentrations of at least some REES seem to favour plant growth and productivity, but the physiological mechanisms are still not well understood. Some considerations concerning, the boundary between essential and non-essential micro nutrients are discussed.},
  author       = {Tyler, Germund},
  issn         = {0032-079X},
  language     = {eng},
  number       = {1-2},
  pages        = {191--206},
  publisher    = {Springer},
  series       = {Plant and Soil},
  title        = {Rare earth elements in soil and plant systems - A review},
  url          = {http://dx.doi.org/10.1007/s11104-005-4888-2},
  volume       = {267},
  year         = {2004},
}