High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samark...High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samarkand, Samarkand region of the Republic of Uzbekistan. The obtained results confirm the potential of using this plant for phytoremediation purposes.展开更多
The trends of distribution,translocation and seasonal change of heavy metal Pb were studied based on the surface and bottom water sampling in Jiaozhou Bay in 1979,and compared with those in 1990's.The results show...The trends of distribution,translocation and seasonal change of heavy metal Pb were studied based on the surface and bottom water sampling in Jiaozhou Bay in 1979,and compared with those in 1990's.The results showed that the source of Pb in the bay was from wastewater and sewage in the east of Jiaozhou Bay from ocean vessels.Pb concentration was higher in spring and lower in summer and autumn,and remained stable through sedimentation in the bottom layer.The overall water quality was good in 1970's.Compared with the environmental monitoring data of 1995-1999,Pb pollution had become serious.Therefore,more efforts should be made to protect the bay from Pb pollution.展开更多
Pb in the farmland surface soil of Changchun suburb was taken as the main research object. The field research and laboratory analysis were used to investigate Pb content, spatial distribution characteristics and its e...Pb in the farmland surface soil of Changchun suburb was taken as the main research object. The field research and laboratory analysis were used to investigate Pb content, spatial distribution characteristics and its ecological risk in different farmland soils. The results showed that Pb content was during 18.85 - 41.34 mg/kg in farmland soil of Changchun suburb, and was higher than the background value of Jilin Province at 90% of the sampling sites. The spatial distribution of Pb content in farmland soil had obvious geographical features, and Pb content in southwest and northeast soils was higher. The high-content areas were relatively concentrated, and Pb content gradually reduced from the high-content island- shape center to its surrounding. The soil Pb contents in paddy field, dry field and vegetable field had insignificant difference with the background value, indicating that Pb accumulations in dry field, paddy field and vegetable field were not significant. The order of Pb content in different land use types was showed as follows： vegetable field 〉 dry field 〉 paddy field. Pb pollution of all samples belonged to light pollution. The average potential ecological risk of soil Pb in different land use types presented the following order： vegetable field 〉 dry field 〉 paddy field.展开更多
文摘High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samarkand, Samarkand region of the Republic of Uzbekistan. The obtained results confirm the potential of using this plant for phytoremediation purposes.
基金Funded by Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, SOA, the Director’s Foundation of the Beihai Monitoring Center, the State Oceanic Administrationa Project of Chinese Academy of Science (KZCX 2-207)
文摘The trends of distribution,translocation and seasonal change of heavy metal Pb were studied based on the surface and bottom water sampling in Jiaozhou Bay in 1979,and compared with those in 1990's.The results showed that the source of Pb in the bay was from wastewater and sewage in the east of Jiaozhou Bay from ocean vessels.Pb concentration was higher in spring and lower in summer and autumn,and remained stable through sedimentation in the bottom layer.The overall water quality was good in 1970's.Compared with the environmental monitoring data of 1995-1999,Pb pollution had become serious.Therefore,more efforts should be made to protect the bay from Pb pollution.
基金Supported by Science Technology Development Plan Item in Jilin,China(20110403)Key Item of Water Pollution Control and Treatment,China(2012ZX07201-001)
文摘Pb in the farmland surface soil of Changchun suburb was taken as the main research object. The field research and laboratory analysis were used to investigate Pb content, spatial distribution characteristics and its ecological risk in different farmland soils. The results showed that Pb content was during 18.85 - 41.34 mg/kg in farmland soil of Changchun suburb, and was higher than the background value of Jilin Province at 90% of the sampling sites. The spatial distribution of Pb content in farmland soil had obvious geographical features, and Pb content in southwest and northeast soils was higher. The high-content areas were relatively concentrated, and Pb content gradually reduced from the high-content island- shape center to its surrounding. The soil Pb contents in paddy field, dry field and vegetable field had insignificant difference with the background value, indicating that Pb accumulations in dry field, paddy field and vegetable field were not significant. The order of Pb content in different land use types was showed as follows： vegetable field 〉 dry field 〉 paddy field. Pb pollution of all samples belonged to light pollution. The average potential ecological risk of soil Pb in different land use types presented the following order： vegetable field 〉 dry field 〉 paddy field.
