聚丙烯塑料在人工湿地中的降解及其对微生物群落结构的影响
Degradation of Polypropylene Plastics in Constructed Wetlands and Its Effects on Microbial Community Structure
荆鑫鑫 1陈高 2王宁 1张建 1韩郭兰 1张昭 1姜慧琪 1邵媛媛3
作者信息
- 1. 山东建筑大学市政与环境工程学院,山东济南 250101
- 2. 山东省农业科学院,山东济南 250000
- 3. 山东建筑大学市政与环境工程学院,山东济南 250101;中国科学院水生生物研究所,湖北武汉 430000
- 折叠
摘要
随着一次性塑料口罩的使用量逐年增多,废弃口罩的肆意丢弃和处理极易对环境造成污染.以日常用聚丙烯(polypropylene,PP)材质的一次性口罩为研究对象,将其添加到人工湿地中,分析聚丙烯塑料在人工湿地中短期降解过程(90d和180d)中的形态变化,并分析其在降解过程中塑料际微生物群落结构变化.研究结果表明,在降解过程中聚丙烯塑料表面明显由光滑变为粗糙,乙烯长链断开,产生了新官能团羰基和醚键,表面疏水性变小;180 d后,在人工湿地出中检出直径为10～30 μm的聚丙烯塑料;在人工湿地中降解180 d后,聚丙烯塑料际表面基本形成稳定的微生物群落结构,主要以假单胞菌(Pseudomonadales)和芽孢杆菌(Bacillales)为主,随着时间的延长,人工湿地中与氮转化相关的微生物多样性和物种丰富度降低.
Abstract
With the escalating usage of single-use plastic masks,the indiscriminate disposal and mishandling of discarded masks pose a significant threat to environmental contamination.The study focused on the degradation process of a disposable face mask made from polypropylene(PP)in a constructed wetland.The morphological changes of the polypropylene plastic were analyzed over a short-term period of 90 days and 180 days,and the impacts of polypropylene plastic degradation on microbial communities in wetlands were also investigated.The results showed that a transition in the surface morphology of polypropylene plastic from smooth to rough,accompanied by the cleavage of long ethylene chains and the formation of new functional groups such as carbonyl and ether bonds.Additionally,a decrease in surface hydrophobicity was observed.Polypropylene plastic particles with a diameter of 10-30 μm were detected in the constructed wetland after a period of 180 days.After 180 days of degradation in the constructed wetland,a stable microbial community structure was established on the surface of the polypropylene plastic,primarily comprising Pseudomonadales and Bacillales.Over time,there was a decline in microbial diversity and species richness as-sociated with nitrogen transformation within the constructed wetland.
关键词
聚丙烯塑料/一次性口罩/人工湿地/降解/微生物Key words
polypropylene/disposable masks/constructed wetland/degradation/microorganism引用本文复制引用
基金项目
国家自然科学基金青年科学基金(41907204)
山东省重点研发计划(2022CXGC021001)
山东省重点研发计划(2022TZXD0044)
山东省大学生创新创业训练计划(S202210430028)
山东省大学生创新创业训练计划(S202210430050)
山东建筑大学国内访问学者计划()
山东省高等学校青创科技支持计划()
出版年
2024
NETL
NSTL
万方数据