Comparative Study on the Use of a Moss Species,Barbulalambaranensis C. Mull and leaves of a Vascular Plant, Peperomiapellucida (L.) Kunth for Biomonitoring Heavy Metal Pollution Around Some Major Roads in Ado-Ekiti, Nigeria.

[摘要] The bioaccumulation capacities of two bioindicators, a moss species, Barbulalambaranensis andleaves of a vascular plant, Peperomiapellucidafor heavy metals were investigated and compared. Samples ofthe moss and leaves ofPeperomiapellucida were collected around seven major roads in Ado-Ekiti, Ekiti State,Nigeria. In each location, three subsamples were taken. Samples were then subjected to wet digestion and theconcentrations of Pb, Cd, Cr, Fe, Ni and Cu in the digested samples were analysed using a Flame AtomicAbsorption Spectrophotometer. The results of the study showed variations in the concentrations of the heavymetals among the locations. Pb, Cd and Cr were below detection limits in the leaves of Peperomiapellucidawhile Cd was below detection limit in moss samples. Pb was below detection limits in mosses collected fromsome locations. The concentrations (mg/kg) of Fe, Ni and Cu in the leaves of Peperomiapellucida varied from360.73-1930.33, 0.45-3.12 and 22.05-28.03 respectively while the concentrations of Pb, Cr, Fe, Ni and Cu inmoss samples varied from 1.02-2,07, 0.75-6.13, 1118.67-7480.05, 1.80-6.28 and 14.79-28.03 respectively. Thepresent study showed that the moss species,Barbulalambaranensis was more suitable than the leaves of thevascular plant, Peperomiapellucida in monitoring atmospheric heavy metal pollution in the study area.

[学科分类] 工程和技术（综合）

[关键词] moss species;vascular plant;biomonitoring;heavy metals;Ado-Ekiti