Ceburnis D, Valiulis D
Institute of Physics, Vilnius, Lithuania.
Sci Total Environ. 1999 Feb 9;226(2-3):247-53. doi: 10.1016/s0048-9697(98)00399-4.
Bioaccumulation of metals in moss was studied by the absolute method using a specially designed 'moss bag' technique. Bulk deposition was collected in open areas along with bulk deposition collected under moss. An absolute uptake efficiency of approximately 60% was obtained, which is in good agreement with the value obtained by a relative method. The absolute uptake efficiency varied between 0 and 92%, hence uptake of metals depends very strongly on microenvironmental conditions which can even cause leaching of metals from moss. The best retained elements were Pb, Ni, Cu and V, while Cd, Cr, Fe and Zn exhibited significantly lower uptake efficiencies. Manganese in all cases showed leaching of the element from moss.
采用专门设计的“苔藓袋”技术，通过绝对法研究了苔藓中金属的生物累积情况。在开阔区域收集了大气沉降物，并与苔藓下收集的大气沉降物一起进行分析。获得了约60%的绝对吸收效率，这与通过相对法获得的值非常一致。绝对吸收效率在0%至92%之间变化，因此金属的吸收非常强烈地依赖于微环境条件，甚至可能导致金属从苔藓中沥出。保留效果最好的元素是铅、镍、铜和钒，而镉、铬、铁和锌的吸收效率则显著较低。在所有情况下，锰都表现出从苔藓中沥出的现象。
