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The usability of Cupressus arizonica annual rings in monitoring the changes in heavy metal concentration in air

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Abstract

Air pollution, which has been increasing in recent years, has reached significant dimensions and has become one of the most important agenda topics of present day. Among air pollution components, heavy metals are of particular importance, since they are not easily decomposed, they tend to bioaccumulate, and some of them have toxic or carcinogenic effects even at low concentrations. Therefore, it is an extremely important subject to monitor the changes in heavy metal concentrations found in air. The most preferred method in determining the changes in heavy metal concentrations in the atmosphere is the use of biomonitors. From past to present, trees have been good biomonitors in determining the increase in heavy metal concentrations in the atmosphere. Particularly, with the help of the annual growth rings of trees, vital information can be obtained on the changes in heavy metal concentrations in air. In this study, after the annual rings were determined on the log taken from the main body of the cypress (Cupressus arizonica) tree cut from the Kisla park located in Kastamonu province, the concentrations of Bi, Cd, and Ni in the outer bark, inner bark, and wood were compared in the inward-facing and road-facing parts of these sections. Also, the changes in heavy metal concentrations in the annual rings were evaluated on a yearly basis. As a result of the study, it was found that the element concentrations in the outer bark of the road-facing part were generally at a higher level, and that the changes in the elements on a yearly basis generally followed a fluctuating course, but there had been a general increase in the Cd and Ni concentrations in recent years.

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Acknowledgements

This research is Alican Cesur’s Master Thesis in Kastamonu University, Institute of Science, Programs of Sustainable Agriculture and Natural Plant Resources, where he conducted one part of this research. He sincerely thanks his Advisor Associate Prof. Dr. Mehmet Cetin and Kastamonu University.

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Alican Cesur, Ilknur Zeren Cetin, Adel Easa Saad Abo Aisha, Osama B Muragaa Alrabiti, Akram Mohamed Omar Aljama, Asma Asghar Jawed, Mehmet Cetin, Hakan Sevik, Halil Baris Ozel: design, resources, writing; materials, data collection and/or processing; materials, literature search, analysis and/or interpretation.

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Correspondence to Mehmet Cetin.

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The authors declare that they have no competing interests.

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Responsible editor: Philippe Garrigues

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Cesur, A., Zeren Cetin, I., Abo Aisha, A.E.S. et al. The usability of Cupressus arizonica annual rings in monitoring the changes in heavy metal concentration in air. Environ Sci Pollut Res 28, 35642–35648 (2021). https://doi.org/10.1007/s11356-021-13166-4

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  • DOI: https://doi.org/10.1007/s11356-021-13166-4

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