Summary of soil pollution remediation technology

Remediation of contaminated soil aims to eliminate pollution, restore quality, reuse and protect health. Soil remediation is often a comprehensive purification process to control pollution, reduce pollution, reduce toxicity and reduce risks, which can restore soil productivity, site safety and health, ecological safety of mining areas and wetlands, and landscaping. However, soil remediation is also a process that consumes manpower, material resources and financial resources. Only by doing a good job in soil pollution prevention and control management can this consumption be avoided or reduced. "Everything is born in soil", and the quality of soil determines the quality of everything. In order to ensure human food safety and health, it is necessary to implement the strategy of "pure land" and formulate the action plan of "prevention and repair" of soil pollution. This is especially important for China, a large agricultural country with a population of1300 million. This also requires the government and society to support the research of soil pollution prevention and remediation technology, and establish the norms, financing mechanisms and legislative management policies for the application of soil remediation technology. Remediation of polluted soil is different from remediation of polluted water. Contaminants in soil are difficult to move and dilute, and the spatial differentiation of soil types, land use patterns and contaminated sites requires the development of site-specific and specialized remediation technologies and equipment. Internationally, the technical system of contaminated soil remediation has basically taken shape. Although China can develop soil remediation technology by introducing 2 absorption, 2 digestion and 2 innovation, the particularity of domestic soil types, conditions and site pollution determines the need to develop more practical remediation technologies and equipment with independent intellectual property rights and suitable for national conditions, so as to promote the marketization and industrialization of soil environmental remediation technology. The global market capacity of soil remediation industry is about 1 trillion US dollars. Developing soil remediation technology and equipment in China is not only the need of soil environmental protection and technology industrialization, but also the need of China, a new industry, to participate in the international environmental remediation market competition.