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通过塑料降解海洋细菌从聚钢中不断产生和释放微塑料和纳米塑料

Shiwei Lv¹, Kexin Cui², Sufang Zhao³

¹School of Environment, Harbin Institute of Technology, Harbin 150090, China; Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of China; Fujian Key Laboratory of Marine Genetic Resources, Xiamen 361005, China.

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概括

海洋细菌降解聚钢,产生有害的微塑料和纳米塑料. 这种微生物的作用导致海洋的二次污染,对海洋生物构成风险.

科学领域:

环境微生物学环境微生物学
海洋污染海洋污染
聚合物科学聚合物科学

背景情况:

塑料废弃物碎片通过物理和化学过程变成微塑料.
微生物降解在塑料碎片化中的作用,特别是在海洋环境中,尚不清楚.
海洋细菌可能会通过生物降解加剧塑料污染.

研究的目的:

为了研究聚钢 (PS) 由海洋细菌Alcanivorax xenomutans和Halomonas titanicae的降解.
确定PS的微生物降解是否导致微塑料和纳米塑料的产生.
量化PS生物降解的程度和由此产生的微塑料/纳米塑料的形成.

主要方法:

用PS作为唯一的碳来源培养海洋细菌 (A. xenomutans,H. titanicae).
通过化学组分析分析PS降解,耐热性,代谢中间体和减肥.
使用颗粒大小分析和度测量来描述和量化微塑料和纳米塑料的产生.

主要成果:

无论是A. xenomutans还是H. titanicae都降解了PS,由化学变化和体重减轻而证明.
微塑料和纳米塑料颗粒在生物降解过程中动态生成,其大小在30天内从微塑料转变为纳米塑料.
显著的颗粒物释放发生,峰值度达到数百万颗粒/L,显著的PS百分比转化为微型和纳米塑料.

结论:

海洋细菌对聚钢的微生物降解导致了微塑料和纳米塑料的产生.
这一过程有助于海洋生态系统的二次塑料污染,纳米塑料尤其令人担忧.
需要进一步的研究,以了解微生物降解产生的微型和纳米塑料的环境命运和生态影响.

关键词:

碎片化碎片化海洋细菌是一种海洋细菌.微塑料是一种微塑料.纳米塑料是一种纳米塑料.聚乙烯是一种聚乙烯.

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