China's groundwater remediation is still in its infancy, but there is still a lack of targeted research on the technical needs and management support corresponding to the initial stage. To a certain extent, this is caused by the mismatch between scientific research and demand.
What are the biggest problems in the research and development of soil groundwater remediation in China now? Experts from the fields of industry, academia and research have more unified views: the biggest problem is that research and engineering are out of phase with each other and some developed technologies can not be used to solve practical problems.
Some researchers place emphasis on basic research or repetitive work, and do not study for actual needs. About 70% of China's soil remediation projects adopt technologies such as stable curing, landfill or cement kiln incineration. In the eyes of the owners and remediation companies, all three technologies are relatively simple and are well established and widely adopted in the field of solid waste.
In terms of equipment and standardization of repair technologies, there is still not a big gap between our country and the world's advanced level. Due to the fact that the developed technology is still not enough for the large-scale restoration project, there is no way to establish a post-evaluation system for the technical application of the restoration.
Future remediation of contaminated sites must take into account the integration of soil and water. Symbolic technological provisions make it virtually impossible to promote technological progress. The importance of groundwater remediation in contaminated plots is no less than that of soil remediation. Besides the development of integrated soil and groundwater remediation technologies, more importantly, drinking water security is also involved. At present, China's water resources are in serious shortage.
What technology is the focus of the future?
To tackle the green restoration technology aimed at the sustainable utilization of soil groundwater, research and development of high-efficiency and low-cost farmland soil remediation technology and its scale application supporting technology should be the most important.
At present, the soil repair technology in our country still lacks effective market demand, but the farmland soil pollution can not be ignored. Not long ago, Chen Jining, director of MEP, emphasized "risk control" and changing the nature of land use in soil pollution control, reflecting the feasibility of our country's arable land remediation technology. At the same time, large-scale physical and chemical rehabilitation of cultivated land there are still economic problems. In response, Luo Qi Shi suggested that in view of soil pollution of farmland endangering food safety, involving major issues of people's livelihood, research and development of efficient and low-cost farmland soil remediation technology and its large-scale application of supporting technology should be top priority.
With the increase of remediation projects in contaminated sites, the effect of neighbor avoidance has become increasingly prominent. In the future, it will be very hard to find sites for treatment of contaminated sites, and the site should be treated more frequently by in situ or in situ ectopic repair Remediation implementation of secondary pollution prevention and control put forward higher requirements.
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