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Poplar tree (Populus balsamifera L.) as indicator of mercury emission from a point source
Chemosphere ( IF 8.1 ) Pub Date : 2021-09-11 , DOI: 10.1016/j.chemosphere.2021.132157
D V Yusupov 1 , E E Lyapina 2 , E M Tursunalieva 3 , N A Osipova 4 , N V Baranovskaya 4
Affiliation  

The article provides original data on the ecological and geochemical characteristics of the distribution of Hg in the leaves and annual rings of balsam poplar (P. balsamifera L.) in the zone of influence of lithium production (Novosibirsk). In 2017 high Hg concentration (1300 ng/g) in the poplar leaves was recorded in the northeastern part of the city near the industrial facility of the lithium plant. The investigation showed a clear trend of increased Hg accumulation in the poplar leaves during the growing season. The maximum average Hg content was detected in the leaf litter in 2006 (1153–2425 ng/g). However, the average Hg content in the soil is 294 ng/g, which is significantly lower than the threshold limit value (2100 ng/g). Studies of changes in the content of Hg with the height of the crown of the tree revealed an increase in the upwind side of the emission source, the concentration of Hg in the leaves is on average 1.5 times higher than on the side of the "wind shadow". Hg in poplar leaves, leaf litter, and soils is mainly found in free and physically bonded forms - the most mobile, prone to increased migration, transformation and methylation under environmental conditions. According to the Hg content in the poplar cores, an increase in the Hg input near the source was established with the beginning of Li production - in the period 1967–1985 years (441 ng/g) with a subsequent decrease to 6 ng/g in 2000–2017.



中文翻译:

杨树(Populus balsamifera L.)作为点源汞排放的指标

文章提供了苦瓜叶和年轮中汞分布的生态和地球化学特征的原始数据L.) 在锂生产影响区(新西伯利亚)。2017 年,该市东北部锂工厂工业设施附近的杨树叶中的汞浓度很高(1300 纳克/克)。调查显示,生长季节杨树叶片中汞的积累有明显增加的趋势。2006 年在落叶中检测到最大平均汞含量 (1153–2425 ng/g)。然而,土壤中的平均汞含量为 294 ng/g,明显低于阈限值(2100 ng/g)。Hg 含量随树冠高度变化的研究表明,排放源的逆风侧增加,叶子中的 Hg 浓度平均比“风”侧高 1.5 倍。阴影”。杨树叶中的汞,落叶和土壤主要以游离和物理结合的形式存在——最易流动,在环境条件下容易增加迁移、转化和甲基化。根据杨树核中的汞含量,随着锂生产的开始,源头附近的汞输入增加 - 在 1967-1985 年期间(441 ng/g),随后下降到 6 ng/g 2000-2017 年。

更新日期:2021-09-21
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