Significance: Green chemistry not only has great social and environmental benefits, but also is a new direction of chemical development. Its fundamental purpose is to re-examine and reform the existing chemistry and chemical industry from the viewpoint of saving resources and preventing pollution. Therefore, this is an important strategic task of contemporary chemistry. Undoubtedly, it is also a brand-new topic in the research of waste utilization and resource utilization.
Value embodiment
Application value: For every ton of scrap steel recovered, 850 kg of steel can be made, which can save 20 tons of iron ore and 0/.2 tons of standard coal compared with iron ore steelmaking. Recycling waste paper 1 ton can regenerate 800 kilograms of good paper, save trees 17, use less soda ash 240 kilograms, reduce papermaking purification emissions by 75%, and save papermaking power consumption by 40%-50%.
Value of waste plastics: By recycling waste plastics to refine gasoline and diesel, more than 700 liters of unleaded gasoline and diesel can be consumed from 1 ton of waste plastics. Related articles: Talking about plastic bottle recycling.
Value of waste cans: After being dissolved, waste cans can be recycled 100% for countless times to form new cans, and can also be made into automobile, airplane parts or furniture.
Value of waste glass: 1 ton of waste glass can be recycled and consumed 20,000 500g bottles. 20% less than using new raw materials. Recycling 1 ton waste glass can save 720kg of quartz sand, 250kg of soda ash, 60kg of feldspar powder, 0/0t of coal and 400 kwh of electricity.
Refer to the above contents: Baidu Encyclopedia-waste utilization, Baidu Encyclopedia-waste recycling.