[Heavy metals contents and Hg adsorption characteristics of mosses in virgin forest of Gongga Mountain].
Seven main moss species in the Hailuogou virgin forest of Gongga Mountain were sampled to determine their heavy metals (Hg, Cr, Cd, Ni, Pb, Cu, Mn, Zn and Fe) content, and two widely distributed species, Pleurozium schreberi (Brid.) Mitt. and Racomitrium laetum Besch., were selected to study their Hg adsorption characteristics. The results showed that the heavy metals contents in the mosses were lower than the background values in Europe and America, except that the Cd had a comparable value, which indicated that the atmosphere in study area was not polluted by heavy metals and good in quality. The Hg adsorption by P. schreberi and R. laetum was an initiative and rapid process, with the equilibrium reached in about two hours, and could be well fitted by Freundlich and Langmuir equations. Based on Langmuir equation, the maximum Hg adsorption capacities of P. schreberi and R. laetum were 15.24 and 8.19 mg x g(-1), respectively, suggesting that the two mosses had a good capacity of Hg adsorption, and could be used as the bio-monitors of atmospheric Hg pollution.
Liang
Peng
P
College of Resources and Environment, Southwest University, Chongqing 400716, China. liangpeng2727@163.com
Yang
Yong-Kui
YK
He
Lei
L
Wang
Ding-Yong
DY
D000327:Adsorption; D000531:Altitude; D044002:Bryophyta / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D008628:Mercury / Q000737:chemistry / Q000378:metabolism*; D019216:Metals, Heavy / Q000737:chemistry / Q000378:metabolism*; D063245:Plant Development; D010944:Plants / Q000737:chemistry / Q000378:metabolism
D019216:Metals, Heavy; D008628:Mercury