A Preliminary Study on Pb Contamination in Soil and Plant in Zhaoyuan City

In order to study the pollution characteristics of Pb in soil and plant of Zhaoyuan City, the surface soil and green plant samples were collected in the downtown of Zhaoyuan City. The Pb content was determined with the flame atomic spectrophotometer. The results showed that the range of the Pb content in soil was 53.23～291.14 mg/kg, with the average content being 96.59 mg/kg. There was a serious Pb contamination in the downtown surface soil in the investigative region. The content of Pb was different in different functional areas, and the industrial area had the most Pb contamination with its content reaching 132.99 mg/kg. The range of the Pb content in leaves of the plant samples was from 5.79～36.6 mg/kg, with that in stems being 13.5～57.17 mg/kg and that in branches being 4.85～54.68 mg/kg. The content in plants and soil had no significant correlation.