It is understood that the main characteristics of five organophosphorus pesticides, such as methamidophos, methyl parathion, parathion, monocrotophos, and phosphoamine, are wide insecticidal spectrum, rapid availability, and low cost, early 1980s. Since then, it has become the dominant species of more than 20 kinds of major pests in rice and other major crops, accounting for 25% of the domestic pesticide market. However, these highly toxic organophosphorus pesticides are highly toxic to humans and animals, have high residues, and have a great impact on the natural environment. For environmental protection and sustainable development of agricultural production, countries around the world and relevant international organizations have adopted strict management measures for high-toxic pesticides such as methamidophos.
On April 4 this year, the Ministry of Agriculture, the National Development and Reform Commission, the State Administration for Industry and Commerce, and the General Administration of Quality Supervision, Inspection and Quarantine issued an announcement and decided to ban the sales and use of methamidophos, parathion and methyl in the domestic market from January 1, 2007. For five kinds of highly toxic organophosphorus pesticides such as parathion, monocrotophos, and phosphoamine, all registration certificates and production licenses (production approval certificates) for all five kinds of highly toxic organophosphorus pesticides including methamidophos were revoked. The announcement requires that all products that have not been sold at the end of 2006 shall be handled by the unit in accordance with the relevant provisions of environmental protection.
According to this announcement, the manufacturers concerned have already made preparations in advance. The largest pesticide production enterprise in Hubei Province, Sharonda Group methamidophos production once reached 10,000 tons, the person in charge of the production department told reporters that Sanonda reached a few years ago began to prepare for the conversion, the current production of methamidophos It has been dismantled and turned into a low-toxicity, high-efficiency replacement product. However, the inventory on the market has not yet been sold out, and it will take some time to digest it. He believes that unsold inventory should be handled by the circulation itself, and it is impossible for them to return to the company. In the absence of a government subsidy policy, companies cannot afford it.
It is understood that many pesticide dealers also reflected that the inventory of these 5 pesticides could not be sold within the specified time limit, and they could not retreat, and they still had to think of ways to sell secretly in order to reduce losses.
The pesticide experts said that in order to protect the environment, the government is advised to give appropriate subsidies for the disposal of banned stock products during the transitional period.
Hot dip galvanized steel coil, also known as zinc coated steel coil, is a method to obtain metal coating by immersing steel components in molten zinc. In recent years, with the rapid development of high-voltage power transmission, transportation and communication, the protection requirements for steel parts are higher and higher, and the demand for hot-dip galvanizing is also increasing. The forming process of hot dip galvanized layer is the process of forming iron zinc alloy between the iron matrix and the outermost pure zinc layer. The iron zinc alloy layer is formed on the surface of the workpiece during hot dip galvanizing, which makes the iron and pure zinc layer combine well.
The process can be simply described as follows: when the iron workpiece is immersed in molten zinc, the solid melt of zinc and α iron (body core) is formed on the interface first. Hot dip galvanizing has the advantages of long anti-corrosion life and wide adaptability to the environment. It has been a very popular anti-corrosion treatment method. It is widely used in power tower, communication tower, railway, highway protection, street lamp pole, marine components, building steel structure components, substation ancillary facilities, light industry, etc.
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