蚌埠市某染料化工企业场地环境调查与风险评估

Environmental Site Investigation and Risk Assessment of a Dye Chemical Enterprise Site in Bengbu City

摘要: 为研究蚌埠市某化工企业遗留场地土壤和地下水受污染程度，根据《污染场地风险评估技术导则》(HJ25.3-2014)对其进行场地调查，利用人体健康风险评估法对场地污染状况进行分析。结果表明：该场地规划为商业居住用地。土壤中超出风险可接受水平的污染物为镍、铜和苯并(a)芘，推荐修复目标值分别为244 mg/kg、4004 mg/kg和0.84 mg/kg。本场地地下水点位存在超出可接受的风险水平，需实施地下水风险控制与修复治理措施。地下水中超出风险可接受水平的污染物为氨氮和铜，修复目标值分别为792 mg/L和1.5 mg/L。场地土壤中镍、铜和苯并(a)芘的修复面积为277 m²，修复土方量约为415.5 m³；铜修复面积为425 m²，修复土方量约为1275 m³；苯并(a)芘修复面积为101 m²，修复土方量约为101 m³。场地地下水中氨氮的修复面积为257 m²，修复水量约为926 m³；铜的修复面积为13,445 m²，修复水量约为48,422 m³。

Abstract: In order to study the degree of soil and groundwater pollution in a chemical enterprise’s legacy site in Bengbu City, a site survey was conducted according to the “Technical Guidelines for Risk Assess-ment of Polluted Sites” (HJ25.3-2014), and the human health risk assessment method was used to analyze the site pollution status. The results indicate that the site is planned for commercial and residential use. The pollutants in the soil that exceed the acceptable risk level are nickel, copper, and benzo (a) pyrene, with recommended remediation target values of 244 mg/kg, 4004 mg/kg, and 0.84 mg/kg, respectively. There is an acceptable risk level of groundwater at this site, and measures for groundwater risk control and remediation need to be implemented. The pollutants in groundwater that exceed the acceptable risk level are ammonia nitrogen and copper, with remedia-tion target values of 792 mg/L and 1.5 mg/L, respectively. The remediation area of nickel, copper, and benzo (a) pyrene in the site soil is 277 m², and the amount of remediation soil is approximately 415.5 m³. The copper repair area is 425 m², and the repair earthwork volume is approximately 1275 m³. The remediation area of benzo (a) pyrene is 101 m², and the remediation earthwork volume is approximately 101 m³. The remediation area of ammonia nitrogen in the underground water of the site is 257 m², and the remediation water volume is approximately 926 m³. The repair area of copper is 13,445 m2, and the repair water volume is approximately 48,422 m³.