Can cigarette butts be purified? What are the ingredients of those cotton-like cut tobacco in cigarette butts? Can it be recycled?

At present, acetate fiber filter is widely used. Filtering is a complex process, that is, tar droplets are separated from the smoke and attached to the filter material when they reach the surface. . The longer the filter tip, the better the smoke reduction effect. At present, no new material has been found to completely replace acetate fiber. ?

Cigarette butts contain a lot of carcinogens because they absorb tar and nicotine, so it is of little significance to purify them, and it is even more impossible to recycle them. From this point of view, the business prospect is not good, so we can consider another angle. We might as well develop more protective filters or imitation cigarettes, which will bring benefits to the health of smoking men.

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Hazards of smog

chronic poisoning

Nicotine is a highly toxic substance. The oral LD50 of nicotine in rats is 50mg/kg, and that in mice is 3.3 mg/kg[ 1 1]. Nicotine in one cigarette can poison a mouse, and nicotine in 20 cigarettes can poison a cow. If a person smokes a large amount of nicotine at a time (50 to 70 mg, equivalent to the nicotine content of 40 to 60 cigarettes), it may lead to death. If nicotine in a cigar or three cigarettes is injected into a person's vein for 3 to 5 minutes, he will die.

Tobacco is not only harmful to higher animals, but also harmful to lower animals, so it is also the main component of agricultural pesticides. So: "poisonous snakes don't bite smokers." Because they smelled the bitterness of smoking, they ran away. Similarly, passive smokers are uncomfortable with the smell of smoke. There are many people who smoke more than one box (20 cigarettes) a day. Some people smoke a lot but are not poisoned. Among them, the nicotine content greatly exceeds the lethal dose of people, but few people die of acute poisoning. The reason is that some nicotine in tobacco is neutralized by formaldehyde, a poison in smoke, and most of it will not continue smoking. These nicotine will slowly enter the human body intermittently.

In addition, 50% of nicotine diffuses into the air with smoke, 5% is thrown away with cigarette butts, 25% is destroyed by burning, and only 20% is absorbed by human body. Nicotine is rapidly detoxified in the body and excreted with urine. Coupled with long-term smokers, the body has tolerance and addiction to nicotine, which makes people addicted to cigarettes. Columbus discovered the new continent in 1492, and at the same time found that local Indians smoked, which was the earliest direct discovery of human smoking. It can be seen that human smoking has a history of about 600 years. When Columbus arrived at the coast of the West Indies, he saw the local Indians roll dry tobacco leaves into tubes and ignite them, emitting smoke and pungent smell.

By the middle of16th century, tobacco had spread rapidly to other parts of the world. By the beginning of17th century, tobacco had been introduced to Germany, Russia, Turkey, Philippines, Japan and other places. Cigarettes only appeared during the Crimean War in the middle of19th century. 1887 cigarette maker came out in Britain, so cigarette production developed rapidly. People in ancient China didn't smoke.

Tobacco was introduced to China at the end of 16. The earliest transliteration was "Danbaku" in the Wanli period of Ming Dynasty (1573 ~ 1620), and the name of tobacco was changed at the end of Ming Dynasty. According to historical research, tobacco was introduced into China through three routes, one was from the Philippines to Taiwan Province Province and Fujian Province in China, and then to the northern region; The other was introduced to Guangdong from Nanyang; The third article was introduced into Liaodong from Japan via Korea. It is generally believed that China was first introduced into Taiwan Province and Fujian provinces of China from the Philippines.

By the end of Chongzhen in the Ming Dynasty, smoking was prevalent. In the Qing dynasty, the wind was even stronger. Since then, it has become a common custom for guests to offer cigarettes first and then tea. Medical scientists in Ming and Qing dynasties have observed the toxic and side effects of tobacco on human body. For example, it is recorded in Compendium of Materia Medica in South Yunnan that tobacco is "disturbing people's unconsciousness ..."; "Herbal Yan Hui" records that "if you eat it occasionally, your breath will be blocked and you will be bored to death, and you will not know what to do." Zhang Jingyue, a Chinese medicine doctor, once said: "Smoking can dispel evil spirits, but it will also consume qi" and concluded that "Smoking also harms people".

Baidu encyclopedia-nicotine