Recently, with the "concave crystal materials integration technology for heavy metal contaminated soil research and remediation" project by the provincial Science and Technology Department identified and successfully tested in white silver, heavy metal contaminated soil to solve this global problem Road in Gansu Province is expected to take the lead Get the answer. According to experts' evaluation, the project has reached the international advanced level. Among them, five sub-projects have been inspected by relevant institutions of the Chinese Academy of Sciences, confirming that no reports have been reported at home and abroad, filling the international gap. This achievement is expected to bring good news to areas suffering from heavy metal pollution in the land. Sand Casting Copper,Steel Sand Casting Process,Sand Cast Copper Parts,Copper Sand Casting Wuxi Zhenzhe Electric Power Technology Co.,Ltd , https://www.zhenzhecasting.com
This internationally leading technology is simple to say, using raw materials such as attapulgite and water. In Shapogang Village, Wangjing Town, Baiyin Town, the attapulgite after purification and processing is placed in the contaminated farmland, and then poured into water. After physical action, the heavy metal ions originally deposited in the farmland are firmly adsorbed on the attapulgite. on. Under the action of water, the attapulgite with heavy metal ions adsorbed quickly bursts and pulverizes, flows along the previously opened diversion channel to the collection tank next to the farmland, and then undergoes ionization and heavy metal ions adsorbed thereon. Separate beforehand. After the test, the farmland that was originally polluted by heavy metals recovered its vitality and could be replanted; the heavy metal ions in the collection tank could be recovered by electrolysis, precipitation and extraction. The recovery experiment of heavy metal cadmium shows that high purity cadmium with a purity of up to 99.99% can be recovered through the above process.
The attapulgite, also known as palygorskite, is a clay mineral widely used in petroleum , chemical, building materials, paper, medicine, and agriculture. The proven reserves of attapulgite in Gansu Province are as high as 1 billion tons, ranking first in the world, but they are still blank in industrial development. According to Jia Xiaotian, member of the Provincial Political Consultative Conference and dean of the Provincial Institute of Industrial Technology, the attapulgite has a strong adsorption force and can collapse when exposed to water. Heavy metal ions cannot dissolve in water. The combination of the two can just give full play to them. The physical properties enable heavy metal ions to flow off the confracted rods and flow out of the contaminated farmland. Compared with the chemical and biological methods still in the experimental stage in the world, the use of attapulgite to solve soil heavy metal pollution has the advantages of convenient material extraction, simple operation and low cost. Etc.
According to the Science and Technology Research Report of the Lanzhou Chaxin Information Center of the Chinese Academy of Sciences, the project has established a concave crystal material system suitable for use in the field to remove heavy metal pollution from the soil. The concave crystal material is used to repair the mechanized construction technology and technology of the heavy ion repair operation in Daejeon. The rapid detection method for the treatment of heavy metals in soil by electric resistance method, the implementation scheme of soil heavy metal pollution by concave crystal material system for soil properties, and the method for removing heavy metal in situ under soil, have not seen relevant literature reports at home and abroad. , filled the international gap.