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With the decommissioning or relocation of enterprises, organic pollutants and heavy metal pollution in the remaining sites have become one of the main forms of soil pollution. If the high-risk organic pollution site is directly developed and used as construction land, it will threaten the safety of

With the decommissioning or relocation of enterprises, organic pollutants and heavy metal pollution in the remaining sites have become one of the main forms of soil pollution. If the high-risk organic pollution site is directly developed and used as construction land, it will threaten the safety of human habitation, while the organic-heavy metal composite contaminated soil is more complex than a single pollution of the soil environmental effects, resulting in higher hazards, and relatively difficult to manage, so the management of the composite contaminated soil has become the focus of attention in the field of soil remediation and environmental protection.

At present, the research on single type of contaminated soil has been very mature, organic - heavy metal composite contaminated soil remediation technology research is relatively small, some studies show that the use of a single remediation technology to form a joint remediation method is currently commonly used in the site restoration of the effective means of restoration.

For organic matter-heavy metal composite contaminated soil, taking Desen soil washing remediation system as an example, the contaminated soil will be firstly processed by isotopic chemical oxidation in the soil remediation program, and then the soil will be chemically washinged for remediation after the organic pollutants reach the standard, so as to achieve the purpose of removing the heavy metals.

① Each batch of soil through the chemical synergistic washing module at least 30 min elution time (control of the hourly water intake is less than half the volume of the slurry tank), so that the soil and the washing agent continuous and full mixing and washing.

② Collected through the synergistic washing module after the treatment of soil slurry pumped into the filtering system, dewatered mud cake that is the washing of the treated soil, transferred to the site to be examined.

③The washing wastewater is treated in the water treatment unit and then recycled.

At present, DXN washing equipment has been successfully applied in representative comprehensive remediation projects in China, such as Shanghai Putuo Chemical Site Remediation Project, Changsha Chromium Salt Plant Remediation Project, Hangzhou Steel washing Remediation Project, Guangzhou Ship washing Remediation Project, Mahe Steel washing Project, Ningbo washing Project, Dahua Barracuda Bay Remediation Project and so on, and the cumulative total volume of soil washing treatment of the participating projects has exceeded 1 million tons. We are looking forward to cooperating with you!