Systematic Studies Of Mercury Pollutions In Soil, Plant And Air At Major Roadsides In Guilin

In recent years, atmosphere pollution is getting more and more serious in most cities of china, and the pollution type is also changing from burning coal to the traffic pollution gradually. Guilin is the world well-known traveling city, tourism's fast development leads the traffic industry swift and violent development, the traffic exhaust emission inevitably has the influence to the city atmosphere and even the peripheral ecosystem. Thus in this work the choice of the traffic route region where has been polluted by the heavy metal element---mercury is most important.This article is for the purpose of through researching the mercury content in the plant,the soil and the atmospheric which are both in urban and suburban to find the mercury pollution present situation along the two sides of the Guilin traffic skeleton line initially and the mercury element migration rule in this region, and the author proposes reasonable and feasible suggestions of preventing and controlling mercury pollution.This work is divided into two stages. The first stage is mainly working inside,and the work includes trying to find out the best atmospheric sample gathering and measuring program through the massive condition experiments, and thing of the best plan that the plant and the soil's dispelling and measuring. The second stage is collecting vegetables, soil, atmospheric and leaf samples from two sides of LijiangRoad,ZhongshanRoad, LiuheRoad, QintanRoad, NanhuanRoad, DonghuanRoad and the highway in Guilin urban。And all the collected samples contain 68 soil samples, 43 vegetables samples, 25 leaf samples and 50 atmospheric samples. What's more, these samples'mercury content is exactly measured by the AA-700 atom absorption spectroscope (the American PE Corporation).According to those data, the author draws the four significant conclusions:1,As Urban fuel to the main fuel supply points for mercury content measured indicated that the mercury content of the fuel in 3.66-9.74ng/g scope, the information reported above external fuel mercury content in general terms(0.7-3.2ng/g)。2,Soil, plants and atmosphere which are on both sides of highway in Guilin have a certain degree of mercury pollution; the roots, stems and leaves of plants are more obvious different in mercury content, parts mercury content are characterized as follows : leaves > stems >roots; atmospheric mercury content is lower overall, but atmospheric mercury content in traffic-intensive stations, crossroads, and other areas is obviously increased.3,Soil, plants and atmosphere's mercury content distribution have certain similarities, as far away from roads, mercury content is reduced gradually, and this distribution of the release of mercury that traffic tail gas is the main source of pollution. 4,Relevance of the analysis of different types of samples showed that the root of vegetables'mercury content is more obviously impacted by that of soil, while leaves of vegetables and trees'mercury content is affected absolutely by atmospheric mercury content.Finally, this article mainly aims at the mercury pollution which is in the Guilin traffic areas, and the author gives reasonable preventing and controlling mercury pollution's strategies and plans, and proposes some further works'conceives.