Brez kategorije

Biodegradable bags do not decay even after three years underground and in water. “

Biodegradable bags can burden the nature for a long time, as was the previous belief. Research shows that they can remain in good condition after three years under the sea or soil and carry more than two kilograms heavier.

Biologically degradable artificial material – as well as conventional plastics – is most decomposed when exposed to the air and the sun, Imogen Napper and Richard Thompson of Plymouth University wrote in an environmental journal Environmental Science & Technology.

“Plastic materials that are biodegradable are oxoplastics or can be composted, it is often referred to as a possible solution to the problem of the accumulation of plastics and waste,” the scientist wrote. Oxoplasty, that is, degradable by oxidation plastics, contains additives that make them decay faster. As this creates microplasticity, which can hardly be decomposed, the EU strives to ban such artificial substances.

Test in different environments

British scientists wanted to find out what is actually happening with materials in different environments. In the local store, they supplied bags of various types of plastics, among them polyethylene, from which plastic bags are most often made.

Biodegradable bags do not decay even after three years underground and in water.

Biodegradable bags can burden the nature for a long time, as was the previous belief. Research shows that they can remain in good condition after three years under the sea or soil and carry more than two kilograms heavier.

Biologically degradable artificial material – as well as conventional plastics – is most decomposed when exposed to the air and the sun, Imogen Napper and Richard Thompson of Plymouth University wrote in an environmental journal Environmental Science & Technology.

“Plastic materials that are biodegradable are oxoplastics or can be composted, it is often referred to as a possible solution to the problem of the accumulation of plastics and waste,” the scientist wrote. Oxoplasty, that is, degradable by oxidation plastics, contains additives that make them decay faster. As this creates microplasticity, which can hardly be decomposed, the EU strives to ban such artificial substances.

Test in different environments

British scientists wanted to find out what is actually happening with materials in different environments. In the local store, they supplied bags of various types of plastics, among them polyethylene, from which plastic bags are most often made.

The study showed that a piece of plastics was completely dissolved after 18 months in the open air.

Most bags cut into 15 times 25 millimeters of large pieces and placed them in nets that hung them outdoors, buried underground or sank into submarine water. After nine, 18 and 27 months, they examined the content. In addition, the same plastic bags were exposed to the same circumstances. All pieces of plastics, including polyethylene, have completely decomposed outdoors after at least 18 months. “Faster decomposition in the air may be associated with higher levels of ultraviolet radiation and oxygen in combination with higher temperatures than in other environments,” the scientist wrote.

In addition, the artificial substance suitable for composting was completely decomposed in the sea after 18 months, while underground it was detectable even after 27 months. Its capacity has been reduced by more than 70 percent. The plastic bag, suitable for composting, was the only one that could no longer bear any weight after three years. Meanwhile, bags of oxoplastic, biodegradable material and conventional plastics, which lay for three years under the sea or the earth, could still carry 2.25 kilograms heavier.

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Categories: Brez kategorije

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