An approach to studying heavy metal pollution caused by modern city development in Nanjing, China |
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| Authors: | Hui Zhang Dongsheng Ma Qinglin Xie Xiaoling Chen |
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| Institution: | (1) Department of Ecology and Environmental Science, Ineer Mongolia University Huhehot 010021, P. R. China e-mail:shtai@nmg2.imu.edu.cn Fax: +86-471-4951761 Tel: +86-471-4954433-2351, MN;(2) State Key Laboratory for Research of Mineral Deposits, Nanjing University Nanjing 210093, P. R. China, CN;(3) Department of Natural Resources and Environmental Engineering, Guilin Institute of Technology Guilin 541004, P. R. China, CN;(4) National Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan Technical University of Surveying and Mapping Wuhan 430070, P. R. China, CN |
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| Abstract: | Nanjing is currently one of the fastest developing regions in terms of construction and economy in China. Heavy metal pollution
is becoming more serious with the expansion of production and life scales. Four environmental units (highway, refinery, rubbish
dumps associated with human daily life, and shoal of the Yangtse River) were selected from the region according to the geneses
of the pollution to study and evaluate the distribution and mechanism of the contamination, the speciations of the polluting
elements, and the geneses of the pollution in the soils and sediments. The purposes of the study are to understand generally
the current situation and the cause of the pollution, and to provide a scientific basis to prevent and solve the pollution
problem. At the same time, it would be helpful to probe the effective way of studying heavy metal pollution resulting from
the development of modern cities and to accumulate data. It is indicated by the study that the heavy metals contained in the
soil of the environmental unit of the highway are Pb, Co and Cr; in the soil of the refinery Cr, V, Pb, Ni, and Co; in the
soil of the rubbish plot Co, Cu, and Sb; in the sediments of the shoal Pb, Co, Cu, and Ni. Fe-Mn oxide is given the first
place to the speciations in polluting heavy metals transmitted by air. Carbonate is more in speciations of polluting heavy
metals transmitted by water than in speciations of the metals transmitted by air. In the ten elements studied, Pb is most
directly poisonous to the plants in the region; Co and Cu are the next, and Ni is the least. Heavy metal pollution has been
occurring in the soils and sediments of the region and the situation will worsen if some effective measures are not taken.
Received: 18 October 1997 · Accepted: 3 February 1998 |
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| Keywords: | Heavy metal pollution Soil City development Nanjing China |
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