3 results about "Polychlorinated biphenyl" patented technology

The invention provides a method for remediating polychlorinated biphenyl polluted soil through the combination of chemical elution and plants, and belongs to the field of polluted soil remediation. The method comprises the following steps that the polluted soil to be remediated is collected, ground, crushed and screened through a 60-mesh sieve, the water content of the screened soil is adjusted to be 40%-60% of the field water capacity of the soil, and the soil is kept for standby application; medicago sativa seeds with white buds being exposed through bud forcing treatment are evenly sown in the standby soil and cultivated, medicago sativa plants are thinned out after growing for two weeks, and the cultivation period of the medicago sativa plants is 90 days; and the process that eluant is sprayed into the soil is started from thinning-out, the eluant is sprayed once every 5-8 days, and thus polychlorinated biphenyls in the soil are removed. Compared with the prior art, the method is advantageous in that operation is easy, the treatment effect is good, and in-situ remediation can be achieved; the influence on the original environment is small in the remediation process, and the method can be used for a wide range of types of soil; when the method is used for practical environmental remediation, the secondary pollution risk is greatly reduced, and follow-up soil cyclic utilization is facilitated.