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this time, the remediation project of a hexavalent chromium pollution site in hunan was selectedas the research object,and the designof the restoration idea andthe scheme,the implementation of theproject projectand the restoration effect wereselected&n

this time, the remediation project of a hexavalent chromium pollution site in hunan was selected as the research object, and the design of the restoration idea and the scheme, the implementation of the project project and the restoration effect were selected and other aspects to share. according to the soil chromium pollution status of a site in hunan, two main restoration ideas were determined:

1. Change the presence form of chromium in soil sediments, reduce hexavalent chromium to Relatively Less Toxic Cr, and reduce its migration ability and bioavailability in the environment;

2. remove chromium from chromium-contaminated soil/sediment. a series of restoration technologies have been developed at home and abroad, such as immobilization/stabilization, vitrification, soil washing, soil leaching, chemical reduction, electrodynamic repair, phytoremediation, microbial repair, cement kiln incineration disposal, etc.

through comparison, the hexavalent chromium-contaminated soil of the site has the following characteristics: (1) the amount of soil engineering is large; (2) the site restoration time is relatively abundant, and it is suitable to use in situ restoration and off-site restoration techniques such as biological method, phytoremediation, and electric restoration; (3) the soil is not viscous and it is easier to separate, so it was decided to use soil leaching and remediation technology for remediation, which can quickly achieve chromium pollution soil remediation and achieve the purpose of safe and harmless disposal.

The key to soil leaching and remediation technology lies in the choice of soil remediants, and once the selection is wrong, it is likely to bring secondary pollution. The selection of the remedial agent is all green and environmentally friendly, and there is no secondary pollution. The selection of soil leaching equipment adopts a skid-mounted modular design, which is quick to install, convenient to transition, greatly shortens the repair time, and is equipped with a 5G intelligent module, which can be remotely connected to the PC and mobile phone operations, always pay attention to the repair dynamics, and connect with the government platform to achieve the purpose of supervision at any time. The equipment has reached 100t/h repair volume during operation, and it is running well, which greatly exceeds our expectations and has been highly appreciated by customers.

at present, this remediation site has reached the remediation target ahead of schedule, has been completed, this time after taking the corresponding pollution control measures, the project remediation process during the construction period of wastewater, waste gas and noise can be stably discharged, solid waste can be effectively disposed of, polluted plots can meet the needs of the corresponding land use function after restoration. for more information, please call us.