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The Research about the Pollution Mechanism of Heavy Metals in Rivers of the Goldfield of Shaanxi Tong’guan

Author: GuoLu
Tutor: LiYunFeng
School: Chang'an University
Course: Hydrology and Water Resources
Keywords: Heavy metals Pollution assessment Single pollution index To accumulate Index Comprehensive pollution index Distribution law Correlation Control
CLC: X522
Type: Master's thesis
Year: 2005
Downloads: 344
Quote: 1
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Abstract

Environmental pollution seriously affect the sustainable economic development and human health and survival. With the growing economic development, environmental protection has become increasingly human concern. China is a major energy power, the rapid development of mining, but at the same time the mining development has paid a huge environmental cost. To increase the mine environment monitoring, evaluation and its pollution control research, the governance program governance for government agencies to provide the basis for the current environment workers imperative. The typical gold mine in China - Shaanxi Tongguan gold, District of river water and sediment in the river sampling and analysis, evaluation of mining led to heavy metal pollution in the region, analysis of the spatial distribution of heavy metal pollution, and several heavy metal further proposed gold mining area rivers of Heavy Metal Pollution program. Prior to sampling design sampling record sheet, replacing the previous record of this, can the detailed records and samples, to avoid missing. In the processing of the data from the practice worked out an Excel rapid processing of the experimental data. The river water sample test results were evaluated using single pollution index method and comprehensive pollution index, the result is Tongguan gold mining area As and Cr ^{6 basically did not pollute the river, the rest of several elements have pollution, in particular Pb river pollution is the most serious. The study found that the heavy metal pollution of the river valley from west to Tongyu gradually reduced; river, heavy metal pollution of the river from the river upstream to downstream, there is no obvious down trend. The use of land in the sediment on the the Tongguan gold seven rivers cumulative index and integrated pollution index method and found that the area of ??sediment has suffered extremely serious pollution, most of the samples accumulated index in more than 4. The study found that sediment from the West yuhe slow weakening trend to the TG yuhe heavy metal pollution; in the same river, for different heavy metals, the changes are not the same, but in general, As, Cr ^{6 < / sup> basically no sediment pollution, and Pb, Hg, Cd, Cu pollution is relatively serious. Single pollution index of river water and sediment through the use of Excel, to the accumulated index and comprehensive pollution index correlation analysis found that the river due to the randomness of the source of pollution, there is no necessary correlation between the elements of pollution and sediment due to general relatively stable, and so the correlation between the various heavy metals is preferably. The entire course of the study show that, the Tongguan gold mining area rivers have suffered serious pollution, we must strengthen the prevention and control of pollution in the region, and for such pollution, sedimentation process and prior to the discharge of waste into the river dredging, can extract heavy metals in the sediment.}}

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control > River
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