CASE STUDY ON REMEDIATION OF DIESEL CONTAMINATED SOIL AND GROUNDWATER BY ELUENT-EXTRACTION TECHNOLOGY

Taking the real case of diesel leakage in an electroplating enterprise in Zhuhai, Guangdong Province as the example, the ectopic repair extraction technology was used to treat the contaminated groundwater, and the surface leaching process was used to treat the contaminated soil. In this study, nine nozzles were set up in the excavation area of the leaking point, with the sprinkling water rate of 1.3 m³/h, and the spraying duration of 2 h/d. There were 5 nozzles in the western green belt of the leakage point, with the sprinkling water rate of 0.7 m³/h, and spraying duration of 9 h/d. The leaching water entered the groundwater and was then pumped to the sewage treatment plant for later treatment. After 9 months, treatment, the final concentration of petroleum in groundwater was lower than 0.3 mg/L, reaching the limit of petroleum in the Sanitary Standard for Drinking Water (GB 5749—2006).