Browsing by Author "Cesur A."

Now showing 1 - 2 of 2

The usability of Cupressus arizonica annual rings in monitoring the changes in heavy metal concentration in air
(2021-07-01) Cesur A.; Zeren Cetin I.; Abo Aisha A.E.S.; Alrabiti O.B.M.; Aljama A.M.O.; Jawed A.A.; Cetin M.; Sevik H.; Ozel H.B.
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.
The Use of Cupressus arizonica as a Biomonitor of Li, Fe, and Cr Pollution in Kastamonu
(2022-06-01) Cesur A.; Zeren Cetin I.; Cetin M.; Sevik H.; Ozel H.B.
Air pollution became an important problem that severely threatens human health, especially in urban areas. Such that it was reported that 90% of global population respire polluted air and the air pollution causes the death of approx. 7 million annually. It is known that heavy metals have a significantly high share in these deaths. Heavy metals are elements, which do not easily disintegrate in nature, can accumulate in bodies of living organisms, and can be toxic, carcinogenic, and even lethal. Thus, monitoring the changes of heavy metal concentrations in the air is very important for human and environmental health. The method most preferred for determining the change of heavy metal concentration in the atmosphere is the biomonitors. The use of annual rings of trees is one of the most accurate methods because they can provide information about the long-term change of heavy metal concentrations in the air. In the present study, it was aimed to reveal the usability of annual rings of Cupressus arizonica as a biomonitor in determining the change of Li, Fe, and Cr concentrations. Within the scope of this study, the concentrations of elements in the inner bark, outer bark, and wood in the roadsides, where there is intense traffic, and opposite sides of trees were compared and the annual changes in heavy metal concentrations in annual rings were investigated. At the end of this study, it was determined that Fe and Cr concentrations in the roadside outer barks of trees were generally at very high levels, that the annual changes of elements generally followed a fluctuating course, and that annual rings of Cupressus arizonica are very useful for monitoring the annual change of Fe concentration in the air but not for monitoring the changes in Li and Cr concentrations.