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包装胶袋为你分析塑料袋的利与弊

来源: 时间:2019-11-07 22:24:26 浏览次数:

由于包装胶袋大都是用不可再生降解材料生产的,处理这些白色垃圾只能挖土填埋或高温焚烧。但这两种办法都不利于环保,据科学家测试,塑料袋埋在地里需要200年以上才能腐烂,
由于包装胶袋大都是用不可再生降解材料生产的,处理这些白色垃圾只能挖土填埋或高温焚烧。但这两种办法都不利于环保,据科学家测试,塑料袋埋在地里需要200年以上才能腐烂,并且严重污染土壤。而焚烧所产生的有害烟尘和有毒气体,同样会造成对大气环境的污染。自此,塑料袋的命运发生了大改变。
 
塑料袋的主要成分为:聚乙烯(PE)、聚氯乙烯(PV)、聚丙烯(PP)、聚苯乙烯树脂(PS)。而其所造成的危害又有:不易回收,因为回收在利用的成本高,但利用率低,商家可以说是无利可图,而且由于它的回收价格很低很难吸引广大市民进行“白色回收”工作。所以,导致不易回收的现象发生;难以降解。
 
回收回来的白色废弃物不易处理。现阶段主要处理方法有焚烧和填埋,若将其焚烧,则会产生大量的有毒烟雾,污染大气并且促使酸雨的形成,而至于填埋,则将其埋葬100年,则还是原状,无法被自然所吸收,且对土地有极大的危害,改变其酸碱度,影响农作物吸收养分和水分,导致农业减产,至于抛弃在水里或陆地上的塑料制品,不仅影响环境,而且若被动的吞食,则会导致死亡。
 
这样就破坏了生态平衡;高温则分解出毒害物质,塑料制品本无毒害物质,但因为它的回收再利2 用的设备不够完善,工艺简陋,而且许多塑料袋厂家无合法营业执照,导致再生产的塑料制品在温度达到65℃时,毒害物质就会析出并且渗入到食品中,则会对肝脏、肾脏、生殖系统及中枢神经等人体重要部位造成危害。
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