某冶金化工厂排污管网周边受污染土地修复案例研究

A Case Study on the Restoration of Contaminated Land around the Sewage Pipe Network of a Chemical Plant

通过场调将本场地污染土壤分为轻度污染区域与中度污染区域,分区域进行修复。同时确定了修复目标和工程量。通过现有技术比选,采用固定/稳定化技术进行修复,确定修复技术路线。通过小试试验,确定固定/稳定化药剂的投加比为1.5%轻度污染区域,4%中度污染区域。将小试结果应用于修复工程中,修复完成后通过第三方检测公司检测,结果显示达到目标修复值。本工程的成功实施可为其他中大型含镉、砷复合重金属污染土地修复提供借鉴和参考价值。

The contaminated soil is divided into mild/middle polluted area from site survey. Further, the repairs goal and quantities were decided. Through the comparison among existing technologies, fixed/stabilized technology is employed for repairs, and the technology way is decided. The dosage ratio of the agent is decided to be 1.5% and 4% in the mild/middle polluted area by test. The results of the test were further applied to the repairs project which was further tested by the other company, and the results showed that the goal repairs value was reached. The successful application of this item can provide model for other large soil repairs contamitated by Cd and As compound heavy metal.