TCLP法评价钢铁工业区周边土壤重金属生态环境风险

采用土壤随机布点法，采集某钢铁工业区周边34个土壤样品，利用美国TCLP法对钢铁工业区周边土壤重金属（Cu、 Zn、 Pb、 Cd）有效态进行实验分析和生态风险评价。结果表明， Cu、 Zn、 Pb、 Cd有效态含量分别在0.87~57.7 mg/kg、5.20~1338 mg/kg、1.09~379 mg/kg、1.15×10-3~69.9×10-3 mg/kg之间，钢铁工业区土壤不同程度地受到重金属的污染，其中以Zn污染最为严重。内梅罗污染指数评价中，处于安全水平的点位仅占17.6%，受到污染的点位占55.9%。其中，轻污染占20.6%，中污染占2.9%，重污染占32.4%。

Using TCLP Method Evaluating Steel Industrial Zone Surrounding Soil Heavy Metals and Environmental Risks

Using the soil random distribution method 34 soil samples of a steel surrounding area were collected, using United States TCLP method analyzed the effective state of the soil heavy met-als （Cu, Zn, Pb, Cd） . Results showed that the available contents of Cu, Zn, Pb, Cd were in 0.87~57.7 mg/kg, 5.20~133 8 mg/kg, 1.09~379 mg/kg, 1.15 ×10-3~69.9 ×10-3 mg/kg. Steel industry sur-rounding soil was polluted by heavy metal in different degree, among which Zn pollution was the most serious. Nemerow Pollution Index Assessment showed that the safe level was only 17.6%, the contaminated level is 55.9%, including light pollution 20.6%, moderate pollution 2.9%, heavy pol-lution 32.4%.