堆肥体系中的微塑料污染及消减策略

Microplastics Pollution in Composting Systems and the Mitigation Strategies

塑料废物的大量产生及其难降解性使塑料污染成为一个日益突出的环境问题。当较大的塑料垃圾进入环境后,在机械、光照和生物作用下,它们会随着时间的推移逐渐破碎成微塑料,目前发现微塑料已广泛分布于各类环境中。堆肥原料以及堆肥过程中混入的微塑料经过传统的堆肥处理并不能被彻底去除,给使用堆肥产品的土地带来了潜在的环境风险。该文通过对国内外文献的查阅,综述了堆肥体系中微塑料的来源、微塑料对堆肥发酵的影响、微塑料在堆肥处理过程中的命运以及在堆肥过程中去除微塑料的策略,最后对未来可有望实现去除堆肥体系中微塑料污染的研究方向及重点进行了展望。

Due to the increasing production and recalcitrance,the waste of plastics is going to be a new environmental prob-lem.When large plastic wastes enter the environment,they would be broken into microplastics under the function of mechani-cal forces,illumination and/or organism.Presently,microplastics have been found in various environments including the product of compost.Microplastics in the feedstock of compost cannot be completely removed during the traditional compost-ing treatment,which brings potential risks to the land use of composting products.In this paper,the sources of microplastics of compost,the effects of microplastics on compost fermentation,the fate of microplastics during the treatment of composting and the strategies for removing microplastics from composting process had been reviewed.Finally,the future research direc-tions about the removing of microplastics from compost system were envisioned.