University of Zagreb, Faculty of Science, Department of Biology, HR-10000, Zagreb, Croatia.
University of Zagreb, Faculty of Science, Department of Geology, HR-10000, Zagreb, Croatia.
Chemosphere. 2018 May;199:191-200. doi: 10.1016/j.chemosphere.2018.02.008. Epub 2018 Feb 7.
Airborne fly ash and related hazardous particles derived from coal combustion contaminate soil and groundwater, negatively affecting ecosystems. The aim of this study was chemical and toxicological evaluation of aqueous extracts of soil collected from the vicinity of a coal-fired Plomin power plant (PPP), using Lemna (Lemna minor L.) bioassay and additional biochemical indicators - photosynthetic pigments, lipid peroxidation, antioxidative enzymes and glutathione. Topsoil samples were collected from distances of 200, 300, 400 and 800 m from the PPP in accordance with the prevailing SW wind direction. Elevated levels of polycyclic aromatic hydrocarbons (up to 15,765 ng L) and potentially toxic trace elements were detected in the Plomin soil extracts (PEs) in comparison to control soil extract (CE). Trace elements accumulated in L. minor were mostly in accordance with their concentrations in PEs. The results demonstrate that PEs induced significant growth inhibition and other phytotoxic effects. Those effects can be related to damage caused by increased production of reactive oxygen species and impaired antioxidant levels. The connection among the phytotoxicity, a distribution of analyzed contaminants, and distances from the PPP is clearly established.
燃煤飞灰和相关的有害颗粒会污染土壤和地下水，对生态系统造成负面影响。本研究的目的是使用浮萍（Lemna minor L.）生物测定法和其他生化指标——光合色素、脂质过氧化、抗氧化酶和谷胱甘肽，对来自燃煤 Plomin 发电厂（PPP）附近土壤的水提取物进行化学和毒理学评估。根据盛行的西南风方向，从 PPP 200、300、400 和 800 m 处采集表层土壤样本。与对照土壤提取物（CE）相比，Plomin 土壤提取物（PE）中检测到多环芳烃（高达 15,765ng/L）和潜在有毒微量元素的含量升高。痕量元素在浮萍中的积累与 PEs 中的浓度基本一致。结果表明，PEs 会引起明显的生长抑制和其他植物毒性效应。这些影响可能与活性氧产生增加和抗氧化水平受损造成的损害有关。植物毒性、分析污染物的分布以及与 PPP 的距离之间的联系是明确建立的。
