Department of the Environment, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), ES-28040, Madrid, Spain.
Instituto de Ciencias Agrarias, ICA- CSIC. Serrano, 114bis, 28006, Madrid, Spain.
Environ Pollut. 2018 Aug;239:438-447. doi: 10.1016/j.envpol.2018.04.036. Epub 2018 Apr 19.
Natural levels of heavy metals (HM) have increased during the industrial era to the point of posing a serious threat to the environment. The use of tree species to record contamination is a well-known practice. The objective of the study was to compare HM levels under different pollution conditions: a) soil pollution due to mining waste; b) atmospheric pollution due to coal-fired power plant emissions. We report significant HM enrichment in Pinus halepensis tissues. Near a burning power plant, Pb content in a tree wood was 2.5-fold higher that in natural areas (no pollution; NP). In mining areas, Cd content was 25-fold higher than NP. The hypothesis that HM contents in tree rings should register pollution is debatable. HM uptake by pines from soil, detoxification mechanisms and resuspended local soil dust is involved in HM contents in wood and bark.
在工业时代，重金属（HM）的自然水平已经增加到对环境构成严重威胁的程度。利用树种来记录污染是一种众所周知的做法。本研究的目的是比较不同污染条件下的 HM 水平：a）采矿废物引起的土壤污染；b）燃煤电厂排放引起的大气污染。我们报告了 Pinus halepensis 组织中 HM 的显著富集。在燃烧着的发电厂附近，一棵树的木材中的 Pb 含量是自然区域（无污染；NP）的 2.5 倍。在矿区，Cd 含量比 NP 高 25 倍。树木年轮中的 HM 含量应该记录污染的假设是有争议的。松树从土壤中吸收 HM、解毒机制和再悬浮当地土壤尘埃都参与了木材和树皮中的 HM 含量。
