"Black particles" are the bottom layer laid on the asphalt or cement base layer and are generally manufactured from recycled waste tire processing equipment and other waste materials.
On June 21, 2016, CCTV Finance's "Economic Half Hour" focused on the blackout of "black particles" in the culprit of plastic runway poisoning. According to reports, used tires are internationally recognized as hazardous waste and are known as “black pollution”, which can cause serious pollution to the environment.
The report did not intend to push the recycling of used tires to the forefront. Soon, many circular economy experts questioned the argument that used tires were harmful.
The root cause of the "poisonous runway" is the lack of standards.
Jiang Zhiyun, former president of the China Tire Renovation and Recycling Association, said that the plastic track industry has not yet formed a national mandatory standard. Only the recommended standards are not implemented according to the standards, and there is no one to control them. This is the frequent occurrence of the "poisonous runway" incident. The root cause.
Yin Haibo, general manager of Shanghai Plastic Runway Manufacturing Company, has revealed the quality problem of “black particles”. Recently, Shanghai's local plastic track construction no longer uses “black particles”, but instead uses more expensive EPDM particles, because in the absence of supervision, these “black particles” use scrap tires irregularly, and some Also mixed with other chemical waste.
Yin Haibo said that according to Shanghai's newly established plastic track group standard "Limited Hazardous Substances in Plastic Sports Surfaces in School Sports Fields", most of the "black particles" have 18 kinds of polycyclic aromatic hydrocarbons exceeding the standard, and some benzopyrenes exceeded the standard.
"But because the national standard does not contain '18 polycyclic aromatic hydrocarbons', so if the national standard test, these runways containing 'black particles' are likely to be judged as qualified runways." Yin Haibo said.
The recycling of used tires is a good thing to turn waste into treasure.
“If the industry regulates the recycling of used tires, the manufacture of plastic track is a good thing for environmental protection. However, the lack of plastic track standards and the lack of supervision have led to the creation of black workshops.” Deputy Economic and Technological Achievements Transformation Promotion Center Director Qu Ruijing said.
Qu Ruijing believes that CCTV's introduction to used tires is relatively one-sided and easy to cause misunderstanding. He said that the comprehensive utilization of renewable resources is an important part of the circular economy, and used tires have already turned "destroy into treasure" in China. The use of several black workshops that use waste tire waste rubber as raw materials to produce and sell plastic runways to reveal the so-called "poisonous runway" shame is unavoidable.
The French official environmental department experiment proves that used tires are harmless to the human body!
Are used car tires really harmful to humans? At present, people have different opinions, if there is to be a strong persuasion, and the National Environmental Unit and the French Ministry of Environment and Energy Management conducted an experimental project on rubber particles extracted from used tires.
The research focused on sports grounds using rubber pellets (for example, football fields with artificial turf). There are two test items: whether the water infiltrated and discharged from the site will pollute the surrounding environment; the air around the site Quality is the detection of gases emitted by rubber particles.
In order to ensure the authenticity and reliability of the test data, the researchers selected three main rubber particles on the market as the test samples for comparison, and then filled them into three identical artificial turf samples, and finally put these three pieces. Artificial turf is placed in different environments around the world.
The samples of these three kinds of particles are: SBR particles decomposed from used automobile tires, new thermoplastic elastomer particles TPE particles, and EPDM EPDM particles.
In addition, the researchers also placed an artificial turf without any filling material as an additional comparative sample.
The whole experiment began in 2005. Under the normal use of the football field, the researcher focused on the water and emitted gas in the site, and finally got the following results:
Comparison report on the use of three filler materials
1. Rubber particles have no effect on water quality.
2. After the gas emitted by the artificial turf is inhaled by the human body, there is no relevant connection to the health condition.
3. Artificial turf as a filling material using SBR and TPE rubber particles, the content of the scatter is very low, reaching the level of "Relatively low" in Europe. Rubber pellets produced from waste tires are safe for the environment.
4, the use of EPDM particles of artificial turf pitch, the amount of emissions reached a high degree.
5. According to the strict European standards, the water flowing out of the artificial turf from the experimental samples will not affect the environment.
Based on this, INERIS (National Industrial Environmental and Risk Research Association of France) issued a HRE health risk assessment, which is mainly about the study of the health hazards of gas emissions from indoor materials.
According to the report, in the worst case of indoor small and non-ventilated, the substances emitted from the three kinds of filler particles will not cause any harm to the human body.
There is no health risk to the construction workers, athletes, adults and children in the stadium.
In addition, the report finally pointed out that the substances emitted by outdoor artificial turf have no effect on the health of the human body.
Seeing here, a very heavy stone in our heart can finally fall.
The plastic runway poisoning problem has nothing to do with the "black particles" of waste tire production, but it also reflects the cruel reality that "black particles" are not standardized in production and use.
For the management department, it is imperative to develop a test standard and application standard that can be strictly enforced, standardize the production and use of “black particles”, and make the “black workshop” of non-standard production have no place.