【摘 要】
：
There is growing concern about heavy metals pollution in peri-urban areas with the rapid development of urbanization in China.In this paper,heavy metal (Cu,Pb,Zn and Cd) balances on small-scale vegeta
【机 构】
：
State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy o
【出 处】
：
第四届城市、工业、交通和矿山土壤国际会议(The 4th International Conference on Sol
论文部分内容阅读
There is growing concern about heavy metals pollution in peri-urban areas with the rapid development of urbanization in China.In this paper,heavy metal (Cu,Pb,Zn and Cd) balances on small-scale vegetable farming system were studied during the years between July,2003 and July,2005 in an industry-based peri-urban area (Wuxi) of the Yangtze River Delta Region of China.The objectives are to judge trend of the heavy metal accumulation in the agricultural eco-system and assess the healthy risk of heavy metals in soils and vegetables.Results showed that input via organic fertilizers contributed to major heavy metal inputs to the system in the study area which accounted for more than 88.5% of the total inflows of heavy metals.Inputs in the study area were quite high compared to yearly heavy metal inputs in European agricultural area,while the corresponding outputs were obviously low with just accounting for less than 10% of the total inputs.Consequently,Cu,Pb and Zn balances were positive in all plots.With reference to Chinese agricultural soil safety standard level 2,it might be seen that heavy metal contents in plots concerned were all lower than limits fixed in this standard,while soils in the study areas were higher than the background value of Anthrosols in Tai-hu Lake region.Also,assessment of healthy risk indicated that the leaf vegetables had a high risk in the study area.
其他文献
The paper studied the change of land use and its impact on soil quality and then predicted the change of land use and cover in structure and space.Based on the study above this paper predicted the imp
The geochemistry and mineralogy of urban soils are influenced by various superimposing anthropogenic and geogenic factors.Urban development starts on natural soils originally reflecting the geogenic g
Soil contamination and vegetation condition complex assessment within the Vladimir city area applying surface methods,statistic data analysis,mathematic modeling and remote sensing methods has been ca
Urban agriculture has sprouted among residence of many towns in South Africa and Botswana due to economic and food security concerns by urban communities.A system is used where tractor operations are
Industrial dust contains significant portion of magnetic particles,in particular magnetite and hematite,which are produced namely during combustion of fossil fuel,metallurgical or cement production,an
Hydro-pedotransfer functions were derived for partly sealed areas from lysimeter studies and inner-city percolation experiments.The annual percolation rate of urban sites (Du) considers boththe percol
Properties of soils in small green spaces in the "inner city" section of urban areas are often neglected by soil survey and soil scientists.To characterize soil conditions in the urban core of the New
Civilizations attitude towards soils has changed dramatically during the course of history.At the beginning,the alteration of this resource was limited.Progressively,with the development of human acti
In many cities,urban development has reached the fringes of old industrial and mixed industrial/residential areas,where numerous brownfields are located.These urban brownfields usually present interes