The Plant Survey And Tolerance Assessment Of Heavy Metal Polluted Area In Tonglvshan And Longjiaoshan

As a new technology of heavy metal pollution remediation phytoremediation has been paid more and more attention.As the body of the repairing technology— hyperaccumulator becomes crucial. This article is expected to find new plants that endure the heavy metal,by investigating and tolerance evaluating wild plants around tonglu mountain and longjiao mountain of the huangshi in hubei provenice.First,making a sampling survey about heavy metal pollution of the soil in tonglv mountain and longjiao mountain, as a result of the survey area of mineral resources are mainly copper ore, together with the reports the huangshi,s Cd and Pb were overproof, so C u, Mn, zinc, Cd and Pb were the research object. By the Result we found that tonglv mountain,s soil heavy metal content from high to low is: C u > Mn > Cd > Zn > Pb, but the longjiao mountain is Mn > C u > zinc > Pb > Cd. We calculated Pollution index found that: C u and Mn of the soil in tonglv mountain and longjiao mountain were exceed standard and the class of pollution is fifth.in tonglv mountain,the degree of Pb and Cd is first,it is safe.Zn is third and slight pollution.In longjiao mountain,the pollution degree of Zn,Pb and Cd were first,so longjiao mountain was not polluted by the three heavy metals. The soil,s content of Cu,Cd and Zn were higher in Tonglv mountain than longjiao mountain,but Mn was on the contrary.Second,investigating the phytocoenosium of tonglv mountain and longjiao mountain,then cauclating plants,importance value,last find out dominant species by IV.dominant species we found in tonglvmountain were:Robinia pseudoacacia, Broussonetia papyrifera,Mallotus apelta,Bidens pilosa,Cynodon dactylon,Setaria viridis,Kalimeris indica,Rostellularia procumbens,Acalypha australis,Imperata cylindrica。They were Albizia kalkora,Populus × canadensis,Pterocarya stenoptera,Rubus lambertianus,Rubus tephrodes,Vitex negundo var. cannabifolia,Camellia caudata,Phragmites australis,Dendranthema indicum,Viola philippica,Woodwardia japonica,Miscanthus sinensis,Vittaria flexuosa,Erigeron annuus,Hedera nepalensis var. sinensis。 In longjiaomountain.by analyzing the diversity of species found species in tonglv mountain were lesser but the distribution was balance,longjiao mountain was opposite.In the end,we collected plant samples of dominant species,measured the content of heavy metal in root, stem and leaf,and calculated enrichment factor and transfer coefficient,at last singling some Plants who can tolerance heavy metal, We found that :(1)Robinia pseudoacacia,Rostellularia procumbens,Acalypha australis,Imperata cylindrica,Setaria viridis,Bidens pilosa,Viola philippica,Hedera nepalensis var. sinensis and Rubus lambertianus can endure Cd.(2)Some plants endure C u,they are Mallotus apelta,Broussonetia papyrifera,Acalypha australis,Robinia pseudoacacia,Camellia caudata,Phragmites australis and Miscanthus sinensis.(3)Setaria viridis,Acalypha australis,Mallotus apelta,Kalimeris indica,Camellia caudata,Viola philippica,Rubus tephrodes and Woodwardia japonica are tolerant to Mn.(4)Broussonetia papyrifera,Acalypha australis,Mallotus apelta,Albizia kalkora,Dendranthema indicum,Miscanthus sinensis and Woodwardia japonica are tolerant to Pb.(5)Cynodon dactylon,Acalypha australis,Rostellularia procumbens,Kalimeris indica,Robinia pseudoacacia,Rubus tephrodes,Rubus lambertianus,Viola philippica,Erigeron annuus and Vitex negundo var. cannabifolia are tolerant to Zn.these plants are not hyperaccumulator,but they can build phytocoenosium of Repair area as plants that tolerance heavy metal.