Environmental Geochemistry and Health ( IF 3.2 ) Pub Date : 2021-08-04 , DOI: 10.1007/s10653-021-01046-2 Gizem Eker Sanli 1 , Yücel Tasdemir 1
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Abstract
In this study, ambient air samples, olive tree branches (1- and 2-year-old) and their leaves (particulate and dissolved phase) were collected simultaneously between January and December months at a suburban site of Bursa-Turkey. Total polychlorinated biphenyl (PCB) concentrations, sampled by employing passive air samplers, ranged from 0.03 to 0.08 ng/m3 in the atmosphere. The average annual total PCB concentrations belonging to the tree components were 1.14 ± 0.32 ng/g DM in dissolved phase in leaves, 0.71 ± 0.32 ng/g DM in particle phase on leaves, 1.06 ± 0.25 ng/g DM in 1-year-old branches, and 0.93 ± 0.23 ng/g DM in 2-year-old branches. It was determined that the correlation between PCB concentrations in olive tree components and the air was low. This result indicated that besides the tree-air exchange, other possible factors (such as soil-to-tree transitions, wind effect, etc.) affect the levels of PCB concentrations in the tree components. Total PCB concentrations decreased from summer to winter in all samples. The percentage ratio of PCB in the dissolved phase in the leaves was generally higher than other tree components in seasons. PCB homologous distributions indicated 5-CBs were dominant in the tree components and 3-CBs were dominant in the air samples. Highly chlorinated PCB congeners (8-CBs and 9-CBs) were found at low concentrations in both air and tree components samples. The samples indicated that the ratio of PCBs in tree components to the total (tree component+ambient air) PCBs slightly increased with increasing the chlorine number.
Graphic abstract
中文翻译：
橄榄树成分中多氯联苯（PCBs）的累积量及时间趋势
摘要
在这项研究中，环境空气样本、橄榄树枝（1 岁和 2 岁）及其叶子（颗粒和溶解阶段）在 1 月至 12 月期间在土耳其布尔萨的郊区同时收集。使用被动空气采样器采样的多氯联苯 (PCB) 总浓度范围为 0.03 至 0.08 ng/m 3在大气中。属于树木成分的年平均总 PCB 浓度为叶片溶解相 1.14 ± 0.32 ng/g DM，叶片颗粒相 0.71 ± 0.32 ng/g DM，1 年 1.06 ± 0.25 ng/g DM老分支，2 岁分支中 0.93 ± 0.23 ng/g DM。经确定，橄榄树成分中的 PCB 浓度与空气之间的相关性很低。这一结果表明，除了树木与空气的交换外，其他可能的因素（如土壤到树木的过渡、风效应等）也会影响树木成分中 PCB 的浓度水平。从夏季到冬季，所有样品的 PCB 总浓度均有所下降。叶片中溶解相PCB的百分率在季节普遍高于其他树木成分。PCB 同源分布表明 5-CBs 在树成分中占主导地位，3-CBs 在空气样本中占主导地位。在空气和树木成分样品中均发现低浓度的高度氯化 PCB 同系物（8-CB 和 9-CB）。样品表明，随着氯数的增加，树木成分中的 PCBs 占总（树木成分+环境空气）PCBs 的比例略有增加。
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