+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Major and rare earth elements in rainwaters from Japan and East China Sea; natural and anthropogenic sources

, : Major and rare earth elements in rainwaters from Japan and East China Sea; natural and anthropogenic sources. Chemical Geology 209(3-4): 315-326

Rainwater samples collected from Tokyo and nearby locations in Japan as well as from two locations over the East China Sea have been analyzed for their rare earth elements (REEs) and major ions. The major ion compositions of these samples show the contributions of oceanic, crustal, and anthropogenic sources, and suggest the relative importance of these sources. Rainwater samples collected in Tokyo and Chofu (a town about 8 km from metropolitan Tokyo) have distinctly higher SO (sub 4) (super 2-) and NO (sub 3) (super -) content than in rainwater samples from the coastal area and the East China Sea, whereas the major ion compositions of the latter two areas are dominated by sea salt.The rainwater samples also have variable REE compositions, with various enrichment of light REEs over heavy REEs. Rainwater samples from Chofu are significantly enriched in light REEs, whereas those collected in Tokyo have loess or shale-like REE composition. Rainwater from both places, however, has similar major ion compositions. The enrichment of light REEs in the Chofu rainwater samples corresponds to the typical signature of an anthropogenic source. The Y/Ho ratios in these samples are all higher than average crustal values, and in general, increase with increasing enrichment of light REEs. This indicates that physical mixing of crustal and oceanic sources of the REEs cannot account for the variations of the Y/Ho ratios. Furthermore, although the anthropogenic source of the REEs is generally characterized by a high Y/Ho ratio, factors such as particle/rainwater interactions, pH, and speciation of REEs may also be responsible for the variable abundance and fractionation of REEs and Y/Ho in these rainwaters.


DOI: 10.1016/j.chemgeo.2004.06.014

Other references

Larsen, C.P.; Hermansen, N.O.; Dahl, T.; Kjeldsen-Kragh, J., 2004: Positive BacT/ALERT signal from a platelet concentrate 23 h before the donor was admitted to hospital with Streptococcus pneumoniae septicaemia. Vox Sanguinis 87(4): 299-301

Muntaner, C.; Benach, J.; Hadden, W.C.; Gimeno, D.; Benavides, F.G., 2006: A glossary for the social epidemiology of work organisation: part 2 Terms from the sociology of work and organisations. Pseudomonas aeruginosa and Staphylococcus aureus are opportunistic pathogens and frequently coinfect the lungs of cystic fibrosis patients. P. aeruginosa secretes an arsenal of small respiratory inhibitors, like pyocyanin, hydrogen cyanide, or qui...

Rudow, D.L.; Shane, E.; Dodd, V.A.; Russo, M.W.; Emond, J.C.; Brown, R.S.Jr, 2000: Prevalence of bone disease in patients with cirrhosis. Hepatology 32(4 Pt 2): 239A, October

Asai A.; Hoffman H.J.; Hendrick E.B.; Humphreys R.P.; Becker L.E., 1989: Primary intracranial neoplasms in the first year of life. Forty-one infants with histologically verified primary intracranial neoplasms were studied who had been diagnosed and treated during the first year of life at the Hospital for Sick Children during the years 1975-1986. Forty-one percent of tumors w...

Popescu, S.; Csatlos, C., 2002: Braking characteristics of a tractor-semitrailer combination. The paper presents a theoretical research method for the dynamic behaviour in braking process of the tractor-semitrailer combination (system). Based on the equivalent dynamic model of the real physical system, the mathematical model, which describ...

Olah, E.; Nemeth, G.; Papp, J., 1997: BRCA1 and other chromosome 17 genes in pathogenesis of multiple primary cancers. Proceedings of the American Association for Cancer Research Annual Meeting 38(0): 168

Clark, W.E.; Gros, L., 1927: Observations on the tree shrew Tupaia minor* on Borneo. Proc Zool Soc London (1): 254-256

Lekuona, J.; Campos, F., 1997: Evolucion interanual de la poblacion invernante de garza real Ardea cinerea en Navarra (norte de Espana). Ardeola io; 44(1): 93-99

Berger, J.; Lester, P.; Rodrigues, L., 2015: Medical Therapy of Malignant Bowel Obstruction With Octreotide, Dexamethasone, and Metoclopramide. Malignant bowel obstruction is a highly symptomatic, often recurrent, and sometimes refractory condition in patients with intra-abdominal tumor burden. Gastro-intestinal symptoms and function may improve with anti-inflammatory, anti-secretory, and...

Pilling, D.S., 2002: Early employment careers of people with disabilities in the National Child Development Study. To compare the early employment careers of people with disabilities and their non-disabled contemporaries. The employment of 436 people with disabilities was investigated between the ages of 23 and 33. The sample were part of a continuing longitud...