Chemical fractionation of zinc versus cadmium among other metals nickel, copper and lead in the northern North Sea

Nolting, R.F.; Baar, H. J. W. de; Timmermans, Klaas R.; Bakker, Karel

doi:10.1016/s0304-4203(99)00076-6

Cited by 19 publications

(9 citation statements)

References 68 publications

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“…The lower K d s of Fe and Mn were due to the relatively high concentrations of Mn and Fe in the water samples collected in the four estuarine areas of Japan that we observed, compared with those in TRS-422. For Cd, the levels of dissolved Cd in the estuarine water were similar to those in other waters, 1,29,30) whereas GM of Cd concentrations in all the sediment samples was one-tenth as low as those in previous studies, 1,31) probably due to a difference in the Cd contents of lithogenic materials between Japanese estuarine areas and other estuarine areas. 31,32) …”

Section: K D S In the Estuarine Areas Of Japansupporting

confidence: 66%

Sediment-Water Distribution Coefficients of Stable Elements in Four Estuarine Areas in Japan

Takata¹,

Aono²,

Tagami³

et al. 2010

Journal of Nuclear Science and Technology

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Sediment-water distribution coefficients (K d s) were obtained in estuarine areas of four A-class rivers in Japan. The total concentrations of stable elements and naturally occurring radionuclide (i.e., Na, Mg, K, Ca, V, Mn, Fe, Co, Ni, Cu, Rb, Sr, Y, Mo, Cd, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Pb, and U) in the estuarine water at each sampling point and in the corresponding sediment sample were measured. K d s of most of the elements varied within one order of magnitude regarding their differences between minimum and maximum values of each element at all the stations. However, a wide variation of K d s of Mn, Fe, Co, Cu, Rb, and La was observed. In addition, geometric means (GMs) of observed K d s were compared with the recommended values in the IAEA Technical Report Series 422 (TRS-422). The results showed that GMs of K d s for most of the elements agreed well with the recommended values, but GMs of K d s for Mn, Fe, and Cd were more than 10 times lower than the recommended values. The obtained K d values could be important to investigate the behavior, transport, and fate of artificial radionuclide and to assess the radiological doses in estuarine areas.

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Section: K D S In the Estuarine Areas Of Japansupporting

confidence: 66%

Sediment-Water Distribution Coefficients of Stable Elements in Four Estuarine Areas in Japan

Takata¹,

Aono²,

Tagami³

et al. 2010

Journal of Nuclear Science and Technology

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“…). Iron (Fe) and titanium (Ti) are assumed to be related to the silty phase with a detrital origin (Nolting et al ., ). These two elements vary between 7038 and 50 699 p.p.m., and between 1400 and 6056 p.p.m., respectively.…”

Section: Resultsmentioning

confidence: 97%

An 18 000‐year pollen and sedimentary record from the cedar forests of the Middle Atlas, Morocco

Bait

Rhoujjati

Eynaud

et al. 2014

J Quaternary Science

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A new record from the heart of the Moroccan Middle Atlas cedar forests spans the last 18 000 years and provides valuable insight into our understanding of the natural vegetation and environmental changes. The approach is based on the study of pollen content, geochemical elements and grain size analysis. The pollen data indicate that the vegetation was dominated by herbaceous plants until 9000 BP. Such open landscape allowed greater soil erosion and an input of chemical elements from the watershed. After 9000 BP, tree cover, mainly oak, increased slightly and was accompanied by a higher taxonomic diversity. However, several steppe elements remain well represented in the area until 5000 BP, which suggests that the climate was rather dry during the first part of the Holocene. After 6000 BP, the climate became more favourable to expansion of the forest ecosystems, including Cedrus atlantica, thereby reducing erosion. A strong reduction of the tree pollen percentages is recorded after 2000 BP, which may be related to increasing human activities during the Roman period. These forest changes are concomitant with an increase of lead and copper concentrations in the record, probably related to Roman metalworking activities

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“…Field studies also support the argument. Nolting et al (1999) reported that Cd removal by phytoplankton during Emiliania huxleyi bloom was more significant than for other bioactive trace metals. Ho (2006) has compiled a few reliable field studies and reported that Cd quotas in the phytoplankton samples collected in various oligotrophic open ocean regions were remarkably consistent, ranging from 0.44 to 0.54 mmol/mol P. These quotas are almost one order of magnitude higher than the Cd quota observed by Martin and Knauer (1973) in the coastal plankton samples known to be dominated by diatom during spring bloom period.…”

Section: Cd/p Ratios In Sinking Particles and Seawatermentioning

confidence: 99%

Cadmium and phosphorus cycling in the water column of the South China Sea: The roles of biotic and abiotic particles

You

Chou

et al. 2009

Marine Chemistry

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Chemical fractionation of zinc versus cadmium among other metals nickel, copper and lead in the northern North Sea

Cited by 19 publications

References 68 publications

Sediment-Water Distribution Coefficients of Stable Elements in Four Estuarine Areas in Japan

Sediment-Water Distribution Coefficients of Stable Elements in Four Estuarine Areas in Japan

An 18 000‐year pollen and sedimentary record from the cedar forests of the Middle Atlas, Morocco

Cadmium and phosphorus cycling in the water column of the South China Sea: The roles of biotic and abiotic particles

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