The pollution characteristics of arsenic,cadmium,copper,lead,mercury,nickel and chromium(hexava-lant)in soil of Chuyuan Park were analyzed by single pollution index,Nemero pollution index,potential ecologi-cal risk index and geological accumulation index.The results showed that the single pollution index of heavy met-als at 8 sampling points in the park was all less than 1.The Nemero pollution index was all less than 0.7,and the potential ecological risk index was all less than 40.The results of these three methods showed that the heavy metal content in the soil of the park met the national standard limit requirements,and the regional soil environmental quality was good.The geological accumulation index rule shows that the geological accumulation index range of the 8 sampling points in the park is between-5.096 and 4.491,and the pollution situation is more prominent.Due to factors such as different selection criteria and geochemical background values,there are significant differences in the evaluation results of different indices;The geological accumulation index has a great relationship with the value of geochemical background values.It is recommended to take background points around the research area instead of using provincial geochemical background values,which may better reflect the heavy metal pollution sit-uation in the park.At the same time,attention should be paid to the issue of acidification at point 6 in the park,and ecological environment management should be strengthened.A regular monitoring system should be estab-lished to ensure the soil environment safety of the park.
维普
万方数据
