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在自然条件下生物降解塑料降解时间多长?

在自然条件下生物降解塑料降解时间多长?

来源网址:https://www.swjjkl.com/ 2022-03-25 14:22:16    

在自然条件下,生物降解塑料降解时间多长?

How long does biodegradable plastics degrade under natural conditions?
公众特别关注在自然条件下,生物降解塑料降解时间多长,确实是这样。但降解时间和自然条件及其塑料的结构与配方有关,不能一律概论。如果自然条件没有赋予微生物生长或生命活动的一些适宜条件,对生物降解塑料甚至是天然高分子如纸、秸秆、木头等来说,其降解也是会比较缓慢的,我们去郊外林地或山上时能看到一些沙土上的树枝、木头或纸很长时间内没有被环境降解的现象,也是这个道理。
The public pays special attention to the degradation time of biodegradable plastics under natural conditions, which is indeed the case. However, the degradation time, natural conditions and the structure of plastics are related to the formula. If natural conditions do not provide some suitable conditions for microbial growth or life activities, the degradation of biodegradable plastics and even natural polymers such as paper, straw and wood will be relatively slow. It is also true that when we go to suburban forest land or mountains, we can see that some branches, wood or paper on Sandy soil have not been degraded by the environment for a long time.
像PBAT材料制作的生物降解地膜在近5年全国的示范应用来看,快的时候4~5个月就能降解完全,在实际铺膜应用即使作物收割当时没有降解完全,但在翻耕后都能完全降解。
For example, the biodegradable plastic film made of PBAT material can be completely degraded in 4-5 months in the near five years of national demonstration application. In the actual application of film laying, even if it is not completely degraded at the time of crop harvest, it can be completely degraded after ploughing.
像PHA、PBAT材料在海水、(25±3)℃条件下,约在30-60天就能完全降解。
The material can be completely degraded under the conditions of (PHA ± 3) ℃ and (PHA ± 3) ℃ in seawater.
生物降解塑料的降解产物或降解后会不会造成次生环境危害?
Will the degradation products of biodegradable plastics or after degradation cause secondary environmental hazards?
大家都特别关心生物降解塑料降解后的产物会不会对环境造成次生的危害,所以在对生物降解塑料的降解性能要求时增加了重金属含量的指标,进行了严格的要求。
Everyone is particularly concerned about whether the degraded products of biodegradable plastics will cause secondary harm to the environment. Therefore, the index of heavy metal content is added and strict requirements are made for the degradation performance of biodegradable plastics.
对可堆肥塑料其堆肥化后的堆肥进行了毒性试验包括植物毒性试验、蚯蚓毒性试验等。
The toxicity test of Compostable Plastics after composting was carried out, including plant toxicity test, earthworm toxicity test and so on.
因此,从目前看,符合标准要求的生物降解塑料其降解后对环境不会造成次生的危害。
Therefore, at present, biodegradable plastics that meet the standard requirements will not cause secondary harm to the environment after degradation.
以上就是为大家介绍的有关可降解颗粒的详细介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以的态度,为您提供服务https://www.swjjkl.com
The above is a detailed introduction about degradable particles. I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service https://www.swjjkl.com