Bonanno Giuseppe, Cirelli Giuseppe Luigi
Department of Biological, Geological and Environmental Sciences, University of Catania, Via Longo 19, 95125 Catania, Italy.
Department of Agriculture, Nutrition and Environment, University of Catania, Via Santa Sofia 100, 95123 Catania, Italy.
Ecotoxicol Environ Saf. 2017 Sep;143:92-101. doi: 10.1016/j.ecoenv.2017.05.021. Epub 2017 May 16.
This study analyzed the concentrations and distributions of Al, As, Cd, Cr, Cu, Hg, Mn, Ni, Pb and Zn in three different cattail species growing spontaneously in a natural wetland subject to municipal wastewater and metal contamination. The cattail species included Typha domingensis, T. latifolia and T. angustifolia. Results showed that all Typha species have similar element concentrations in roots, rhizomes and leaves, and similar element mobility from sediments to roots and from roots to leaves. This study corroborated three patterns of Typha species growing in metal contaminated environments: high tolerance to toxic conditions, bulk element concentrations in roots, and restricted element translocation from roots to leaves. This study showed that three different Typha species respond similarly to metal inputs under the same polluting field conditions. Given their similar metal content and similar biomass size, our results suggest that T. domingensis, T. latifolia and T. angustifolia may have comparable capacity of phytoremediation. High element uptake and large biomass make Typha species some of the best species for phytoremediation of metal contaminated environments.
本研究分析了在受城市污水和金属污染的天然湿地中自然生长的三种不同香蒲属植物中铝、砷、镉、铬、铜、汞、锰、镍、铅和锌的浓度及分布情况。这些香蒲属植物包括宽叶香蒲、狭叶香蒲和美洲香蒲。结果表明，所有香蒲属植物的根、根茎和叶中的元素浓度相似，且元素从沉积物到根以及从根到叶的迁移性也相似。本研究证实了香蒲属植物在金属污染环境中生长的三种模式：对有毒条件的高耐受性、根中大量元素的浓度以及元素从根到叶的迁移受限。本研究表明，在相同的污染现场条件下，三种不同的香蒲属植物对金属输入的反应相似。鉴于它们相似的金属含量和相似的生物量大小，我们的结果表明宽叶香蒲、狭叶香蒲和美洲香蒲可能具有相当的植物修复能力。高元素吸收量和大生物量使香蒲属植物成为金属污染环境植物修复的最佳物种之一。
