The research and development of heavy metal pollution barrier and passivation technology in farmland has achieved remarkable results.

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[ China Agricultural Machinery Industry News ] October 15th, sponsored by the Ministry of Agriculture Science and Technology Development Center, Guangdong Institute of Eco-Environmental Technology, Institute of Subtropical Agriculture of the Chinese Academy of Sciences, Institute of Agricultural Environmental Ecology of Hunan Academy of Agricultural Sciences, etc. A special on-site exchange meeting on surface and heavy metals was held in Changsha, Hunan. More than 120 people including representatives from the Ministry of Science and Technology and the Ministry of Agriculture, representatives of relevant administrative departments of Hunan and Guangdong Provincial Governments, and representatives of special management expert committees attended the event.
Xu Zengtai, Director of the Rural Science and Technology Department of the Ministry of Science and Technology, Yang Xiongnian, Director of the Science and Technology Development Center of the Ministry of Agriculture, Lan Dingguo, Deputy Director of the Hunan Provincial Agriculture Committee, Zhou Zhouyu, Vice President of the Guangdong Academy of Sciences, and other leaders delivered speeches at the opening ceremony. Congratulations on the convening.
A few days ago, the State Council of China issued the "Opinions on Innovating System and Mechanism to Promote Green Development of Agriculture", placing the green development of agriculture in a more prominent and important position. During the “Thirteenth Five-Year Plan” period, the state launched a special project of “Research and Development of Agricultural Surface Sources and Integrated Prevention and Remediation Technology for Heavy Metal Contaminated Farmland”. The conference was mainly to implement the central government's decision-making and deployment of promoting green development of agriculture, summarizing the effectiveness of technology research and development and demonstration application of special projects, gathering the strengths of government, research and research, promoting the deep integration of science and technology and industry, and jointly promoting agricultural aspects. The prevention and control of source pollution will enable the farmland after the treatment to grow “healthy” crops and ensure “safety on the tip of the tongue” from the source.
At the meeting, Li Fangbai, director of the Guangdong Institute of Eco-Environmental Technology, introduced the progress of the project “Research on Heavy Metal Pollution Barrier and Passivation Technology and Materials Development”. The project is hosted by the Guangdong Institute of Eco-Environmental Technology and brings together leading units such as the Chinese Academy of Agricultural Sciences, the Chinese Academy of Sciences, and the Ministry of Education, including 10 in the agricultural sector, 4 in the resource sector, and 3 in environmental protection companies. Relying on the country's six key laboratories, 14 provincial and ministerial key laboratories or engineering centers, and three experimental bases, with the advantages of plant physiology/nutrition, soil chemistry, microbiology, mineralogy and other disciplines, research and development of farmers can be accepted, the government can A technology that can withstand and develop in the industry. The project is mainly based on paddy fields and vegetable fields, taking into account wheat fields; cadmium and arsenic; focusing on safe production of agricultural products, focusing on key technology research and development, materials and product development, and technical standards, strengthening technical combinations to solve heavy metals in China's agricultural products. The problem of exceeding the standard provides technology and products with practical value. At present, the project has invented iron-based biochar passivation heavy metal technology, rice heavy metal leaf surface barrier technology, fertilizer-type soil heavy metal passivation agent, and realized agricultural circular economy and ecological agriculture development system from the technical level, effectively reducing heavy metal activity and improving The efficiency of agricultural production standards.
In addition, relying on the project, the project team applied for 35 inventions, 6 PCTs, and 28 inventions, including 1 in the US and 2 in Japan. A total of 133 papers were published, of which 89 were included in SCI. He won 2 first prizes for provincial technical inventions and 1 Chinese prize. The products have been certified by the Ministry of Agriculture. This achievement has been applied as a core technology by the large-scale treatment of heavy metal pollution in the country's farmland. In the past three years, it has been widely applied in Guangdong, Guangxi, and Hunan, with significant economic and social benefits. At the same time, it has cultivated many national major projects, national Jieqing, and national youth top talents. It provides powerful technical support for the safe production of moderately polluted farmland in China.
Experts have said that the implementation of the project “Restriction and Passivation Technology and Material R&D of Heavy Metal Pollution in Farmland” has achieved gratifying progress and achievements in the past year, showing the combination of scientific research and enterprise and the landing of products and technologies in production. The effect is very obvious. . At the same time, various experts have also made valuable suggestions for the future development of the project.
During the event, delegates also observed the heavy metal pollution control demonstration site, farmland non-point source pollution control technology verification area and display area in Changsha County. The project leader introduced soil passivation technology, physiological barrier technology, passivation and barrier. Combined technology, nitrogen and phosphorus loss processes and reduction measures, ditches and interception systems, and application of third-party governance models.
Guangdong Institute of Eco-Environmental Technology, one of the organizers of Guangdong Province, is the only soil science research institution in China's red soil region. It has now developed into an important professional research institution featuring red soil research in the field of soil science in China. Based on the major scientific issues in the frontier of international soil science, the Institute is oriented to the scientific issues of soil science and social development that affect the regional economic and social development and the human resources, and develops a discipline structure that integrates soil science with environmental science and ecological science. Establishing the red soil material circulation theory system of harmonious development of soil and human activities, providing theoretical basis and technical support for the implementation of “Ten Ten Articles” and “Water Ten Articles” in the Red Soil Region, providing scientific basis for major decision-making of social and economic development in China's red soil regions.
The Institute has also achieved fruitful results in the transformation and industrialization of scientific and technological achievements. The representative “leaf surface control technology” entered the Foshan Torch Park in 2010, and the Foshan Municipal Government invested 4.8 million in technology incubation. The product was registered and licensed by the Ministry of Agriculture. In 2014, it introduced social capital, with a license fee of 700,000, an actual investment of 10 million, and an intangible asset assessment of 2.5 million. In Foshan, there is a production line of foliar barrier agent with a production capacity of 1,000 tons/year and a designed output value of 200 million/year. The combination of rice field iron cycle passivation technology, rice physiological barrier technology and passivation + barrier technology can reduce rice pollution, thereby increasing production by 5% to 20%, and popularizing and applying it in Guangdong, Guangxi, Hunan and other provinces. Great economic and social benefits have contributed to the transfer and transformation of scientific and technological achievements in Guangdong Province. Li Fangbai, director of the Guangdong Institute of Eco-Environmental Technology, said that he hopes that the “Hardland Heavy Metal Pollution Barrier and Passivation Technology and Materials R&D” project will provide strong technical support for the management of heavy metal pollution in farmland and the safe use of moderately lightly polluted farmland. Research original new products and new technologies, and strive to provide scientific and technological support for agricultural non-point source and heavy metal pollution prevention and control work.

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