Lovrenčić Mikelić, Ivanka; Oreščanin, Višnja; Barišić, Delko (2021) 40K, 226Ra, 232Th, 238U and 137Cs relationships and behaviour in sedimentary rocks and sediments of a karstic coastal area (Kaštela Bay, Croatia) and related rocks and sediments’ differentiation. Environmental Science and Pollution Research, 28 . pp. 51497-51510. ISSN 1614-7499
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Abstract
Natural (40K, 226Ra, 232Th, 238U) and anthropogenic (137Cs) radionuclides in consolidated sedimentary rocks (limestones s.l. and marls) and unconsolidated sediments (stream sediments and soils) of the Kaštela Bay (Adriatic Sea, Croatia) coastal area were studied. Kaštela Bay is a typical karstic environment and it is under strong anthropogenic influence due to industrialisation and urbanization. Relationships between radionuclides, their behaviour in different types of samples and possible influencing factors were studied. Radionuclides were also studied in relation to selected metals (Al, K, Ca, Fe, Ti, Mn, V, Cr, Co, Ni, Cu, Zn, Ga, Rb, Sr, Y, Pb, and As) and distribution in limestones s.l., marls, stream sediments and soils. Radionuclides’ massic activities were determined by gamma-spectrometry and metals mass fractions were measured by EDXRF technique. Relationships were studied using statistical tools (principal component analysis, factor analysis). It was found that stream sediments were more similar to source rocks (limestones s.l. and marl) than to soils in terms of natural radionuclides’ activities. 40K and 232Th in consolidated rocks were preferentially bound to alumosilicates and associated with the majority of studied metals. However, this was not the case with 226Ra and 238U, which did not show any preferences regarding binding to mineral components or associating with metals. On the other hand, all four natural radionuclides presented the same behaviour in unconsolidated sediments, i.e. they were all preferentially bound to alumosilicates and associated with the majority of metals. 137Cs did not associate with any of the metals or other radionuclides in sediments. The statistical approach applied in this study revealed differences in radionuclides’ relationships and behaviour in a karstic environment and implied possible influencing processes or factors. This approach can be applied in other types of environments as well to study preferential radionuclides’ binding to certain mineral components that influences radionuclides’ mobility and transport to other environmental compartments.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | Adriatic Sea; limestones; marl; radionuclides; soil; stream sediment | ||||||||
| Subjects: | NATURAL SCIENCES > Geology > Geology and Paleontology NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science NATURAL SCIENCES > Interdisciplinary Natural Sciences > Radiation Science |
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| Divisions: | Division for Marine and Enviromental Research Division of Experimental Physics |
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| Depositing User: | Ivanka Lovrenčić Mikelić | ||||||||
| Date Deposited: | 10 Dec 2025 10:43 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/10285 | ||||||||
| DOI: | 10.1007/s11356-021-14240-7 |
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