Determination of the aqua regia soluble content of rare earth elements in fertilizer, animal fodder phosphate and manure samples using inductively coupled plasma mass spectrometry

Deciphering the inorganic chemical record of ancient human activity using ICP-MS: a reconnaissance study of late Classic soil floors at Cancuén, Guatemala

“…Another potential source of REE enrichment at this site may be the seaweed, shell sand and manure used to fertilize the soils [18]. The concentration of REEs in marine plants is considered to be much higher than that of terrestrial plants [25], while animal manures are reported to be a rich source of REEs [26].…”

87Sr/86Sr and trace element mapping of geosphere-hydrosphere-biosphere interactions: A case study in Ireland

“…The average REE pattern of NPK fertilisers (n=3) and fodder phosphate (n=1) (Hu et al, 1998), as well as shallow seawater REE (n=12) (Alibo and Nozaki, 1999;Hongo et al, 2006) are plotted with the streamwater REE from this study for the purpose of visual comparison ( Fig. 7) and illustrate their overall similarity.…”

A review on the potentiality of Rare Earth Elements to trace pedogenetic processes

“…P-fertilizers are a relevant anthropogenic source of REEs in soils (Volokh et al, 1990) and display high REE contents (Table 3). Indeed, P-fertilizers are generally produced from natural phosphates rich in REEs (Hu et al, 1998;Martin and McCulloch, 1999), due to the high affinity of REEs for P-compounds (Tyler, 2004a). Calculations show that with a P-fertilization of 300 kg ha − 1 year − 1 , REE inputs range from 30 to 170 g ha − 1 year − 1 (Hu et al, 2006b) and a continuous intensive application may double the REE content of the soil in 159 years .…”