Journal of Cleaner Production ( IF 9.7 ) Pub Date : 2021-06-03 , DOI: 10.1016/j.jclepro.2021.127816 Meng Qin , Changya Chen , Biao Song , Maocai Shen , Weicheng Cao , Hailan Yang , Guangming Zeng , Jilai Gong
Biodegradable plastics attract public attention as promising substitute for non-degradable plastics that trigger serious plastic pollution, and they are claimed to be environmentally harmless and biodegradable by microorganisms. However, not all biodegradable plastics are completely degradable under natural conditions. Some of them may be disintegrated into microplastics more rapidly than conventional plastics, emerging as another threat to soil environments. As a part of microplastics, biodegradable microplastics may pose stronger negative effects on several soil species than oil-based microplastics under some conditions. Currently, there is a fiercely increasing trend to replace nondegradable plastic commodities with biodegradable ones. Therefore, to discuss the ecological safety of biodegradable plastics is essential before promoting wide application of them during commercial use. This review provided a brief introduction on biodegradable plastics and summarized their deterioration behaviors in terrestrial environments, together with evidences on releases of additives and biodegradable microplastics. Then, potential adverse effects of biodegradable microplastics in soil ecosystems, including responses on soil properties, microbial communities, and several soil species were discussed, suggesting biodegradable microplastics as a potential threat to ecological safety of soil ecosystems. By this token, biodegradable plastics might not be a panacea to the existing “white pollution” and need further exploring.
中文翻译:
从可生物降解塑料到可生物降解微塑料的回顾:对土壤环境的另一种生态威胁?
可生物降解塑料作为引发严重塑料污染的不可降解塑料的有前途的替代品引起了公众的关注,并声称它们对环境无害且可被微生物生物降解。然而,并非所有可生物降解的塑料在自然条件下都可以完全降解。其中一些可能比传统塑料更快地分解成微塑料,成为对土壤环境的另一种威胁。作为微塑料的一部分,在某些条件下,可生物降解的微塑料可能比油基微塑料对多种土壤物种造成更大的负面影响。目前,用可生物降解的塑料替代不可降解的塑料商品的趋势正在急剧增加。所以,在促进可生物降解塑料在商业用途中的广泛应用之前,讨论可生物降解塑料的生态安全性至关重要。本综述简要介绍了可生物降解塑料,并总结了它们在陆地环境中的劣化行为,以及添加剂和可生物降解微塑料释放的证据。然后,讨论了可生物降解微塑料对土壤生态系统的潜在不利影响,包括对土壤特性、微生物群落和几种土壤物种的响应,表明可生物降解微塑料对土壤生态系统的生态安全构成潜在威胁。因此,可生物降解塑料可能不是解决现有“白色污染”的灵丹妙药,需要进一步探索。本综述简要介绍了可生物降解塑料,并总结了它们在陆地环境中的劣化行为,以及添加剂和可生物降解微塑料释放的证据。然后,讨论了可生物降解微塑料对土壤生态系统的潜在不利影响,包括对土壤特性、微生物群落和几种土壤物种的响应,表明可生物降解微塑料对土壤生态系统的生态安全构成潜在威胁。因此,可生物降解塑料可能不是解决现有“白色污染”的灵丹妙药,需要进一步探索。本综述简要介绍了可生物降解塑料,并总结了它们在陆地环境中的劣化行为,以及添加剂和可生物降解微塑料释放的证据。然后,讨论了可生物降解微塑料对土壤生态系统的潜在不利影响,包括对土壤特性、微生物群落和几种土壤物种的响应,表明可生物降解微塑料对土壤生态系统的生态安全构成潜在威胁。因此,可生物降解塑料可能不是解决现有“白色污染”的灵丹妙药,需要进一步探索。讨论了可生物降解微塑料对土壤生态系统的潜在不利影响,包括对土壤特性、微生物群落和几种土壤物种的反应,表明可生物降解微塑料对土壤生态系统的生态安全构成潜在威胁。因此,可生物降解塑料可能不是解决现有“白色污染”的灵丹妙药,需要进一步探索。讨论了可生物降解微塑料对土壤生态系统的潜在不利影响,包括对土壤特性、微生物群落和几种土壤物种的反应,表明可生物降解微塑料对土壤生态系统的生态安全构成潜在威胁。因此,可生物降解塑料可能不是解决现有“白色污染”的灵丹妙药,需要进一步探索。