Laboratory of Water, Biodiversity and Climate Change, Faculty of Sciences Semlalia Marrakesh, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakesh, 40000, Morocco.
Bull Environ Contam Toxicol. 2023 Aug 11;111(2):24. doi: 10.1007/s00128-023-03783-9.
This study aims to use environmental indices as complementary tools to other air quality biomonitoring techniques. The concentrations of trace elements Hg, Se, V, Mo, and Ba were analyzed by ICP-MS in four lichens: Xanthoria calcicola, Xanthoria parietina, Ramalina pollinaria, and Ramalina lacera. To assess the contamination of lichens by trace elements, different environmental indices were calculated: Contamination Index (Ic), Contamination Factor (CF), Pollution Load Index (PLI) and Enrichment Factor (EF). The results revealed that the genus Ramalina has a low tolerance to polymetallic pollution with a PLI not exceeding 0.44. The genus Xanthoria seems more resistant to polymetallic pollution with a maximum PLI of 2.58. The calculation of the enrichment factor revealed a very strong enrichment of the lichens in Mo, Hg and Se with a maximum content in Ba which reflects a strong metallic contamination of various origins especially in the urban and industrial areas of the region.
本研究旨在将环境指数作为其他空气质量生物监测技术的补充工具。通过电感耦合等离子体质谱法（ICP-MS）分析了四种地衣（Xanthoria calcicola、Xanthoria parietina、Ramalina pollinaria 和 Ramalina lacera）中的痕量元素 Hg、Se、V、Mo 和 Ba 的浓度。为了评估地衣中痕量元素的污染情况，计算了不同的环境指数：污染指数（Ic）、污染因子（CF）、污染负荷指数（PLI）和富集因子（EF）。结果表明，Ramalina 属对地衣的多金属污染具有低耐受性，PLI 不超过 0.44。Xanthoria 属对地衣的多金属污染具有更高的耐受性，PLI 最大值为 2.58。富集因子的计算表明，地衣对 Mo、Hg 和 Se 具有很强的富集作用，Ba 的含量最高，反映了各种来源的强烈金属污染，特别是在该地区的城市和工业区。
