Shen Maocai, Liu Shiwei, Hu Tong, Zheng Kaixuan, Wang Yulai, Long Hongming
School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui, 243002, PR China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
J Environ Manage. 2023 May 15;334:117529. doi: 10.1016/j.jenvman.2023.117529. Epub 2023 Feb 17.
Massive production and spread application of plastics have led to the accumulation of numerous plastics in the global environment so that the proportion of carbon storage in these polymers also increases. Carbon cycle is of fundamental significance to global climate change and human survival and development. With the continuous increase of microplastics, undoubtedly, there carbons will continue to be introduced into the global carbon cycle. In this paper, the impact of microplastics on microorganisms involved in carbon transformation is reviewed. Micro/nanoplastics affect carbon conversion and carbon cycle by interfering with biological fixation of CO, microbial structure and community, functional enzymes activity, the expression of related genes, and the change of local environment. Micro/nanoplastic abundance, concentration and size could significantly lead to difference in carbon conversion. In addition, plastic pollution can further affect the blue carbon ecosystem reduce its ability to store CO and marine carbon fixation capacity. Nevertheless, problematically, limited information is seriously insufficient in understanding the relevant mechanisms. Accordingly, it is required to further explore the effect of micro/nanoplastics and derived organic carbon on carbon cycle under multiple impacts. Under the influence of global change, migration and transformation of these carbon substances may cause new ecological and environmental problems. Additionally, the relationship between plastic pollution and blue carbon ecosystem and global climate change should be timely established. This work provides a better perspective for the follow-up study of the impact of micro/nanoplastics on carbon cycle.
塑料的大规模生产和广泛应用导致全球环境中积累了大量塑料，这些聚合物中的碳储存比例也随之增加。碳循环对全球气候变化以及人类的生存和发展具有至关重要的意义。随着微塑料数量的不断增加，毫无疑问，这些碳将持续被引入全球碳循环。本文综述了微塑料对参与碳转化的微生物的影响。微/纳米塑料通过干扰二氧化碳的生物固定、微生物结构和群落、功能酶活性、相关基因的表达以及局部环境的变化，来影响碳转化和碳循环。微/纳米塑料的丰度、浓度和尺寸会显著导致碳转化的差异。此外，塑料污染会进一步影响蓝碳生态系统，降低其储存二氧化碳的能力和海洋碳固定能力。然而，问题在于，目前对于相关机制的了解严重不足，信息极为有限。因此，需要进一步探究微/纳米塑料及其衍生有机碳在多种影响下对碳循环的作用。在全球变化的影响下，这些碳物质的迁移和转化可能引发新的生态和环境问题。此外，应及时建立塑料污染与蓝碳生态系统以及全球气候变化之间的关系。这项工作为后续研究微/纳米塑料对碳循环的影响提供了更好的视角。
