Aging of biodegradable blended plastic generates microplastics and attached bacterial communities in air and aqueous environments

被引：54

作者：

Bao, Ruiqi ^{[1
,2
]}

Pu, Jingrun ^{[1
,2
]}

Xie, Chaolin ^{[1
,2
]}

Mehmood, Tariq ^{[1
,2
]}

Chen, Wei ^{[1
,2
]}

Gao, Liu ^{[1
,2
]}

Lin, Wenlu ^{[1
,2
]}

Su, Yuanyuan ^{[1
,2
]}

Lin, Xubing ^{[1
,2
]}

Peng, Licheng ^{[1
,2
]}

机构：

[1] Hainan Univ, Key Lab Agroforestry Environm Proc & Ecol Regulat, Haikou 570228, Hainan, Peoples R China

[2] Hainan Univ, Coll Ecol & Environm, Haikou, Hainan, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2022年 / 434卷

基金：

中国国家自然科学基金;

关键词：

Aging; Blended plastic; Microbial community; Microplastic; MICROBIAL COMMUNITIES; DEGRADATION; POLYPROPYLENE; PELLETS;

D O I：

10.1016/j.jhazmat.2022.128891

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of biodegradable plastics (BPs) has been widely promoted in recent years, but before their complete degradation, the phase of microplastics (MPs) is inevitable. However, little information concerning the production of MPs from blended polymers is available. This study aimed to explore the characteristics of MPs produced from blended plastics and the development of biofilms on plastic surfaces under long-term aging. Here, three blended materials (i.e., PBAT (53%)+PLA (10%)+Starch (20%), PBAT (80%)+Starch (20%), HDPE (60%)+CaCO3 (40%)) were aged for 90 days in air, deionized (DI) water and seawater. The results showed massive production of MPs (9653 +/- 3920-20,348 +/- 5857 items/g) from blended plastics accompanied by a large quantity of flocculent substances during 90 days aging period. Furthermore, the richness of bacteria communities on hydrophobic plastics (i.e., PBAT (53%)+PLA (10%)+Starch (20%), PBAT (80%)+Starch (20%)) was higher than hydrophilic plastics (i.e., HDPE (60%)+CaCO3 (40%)), and bacterial communities attached to blended plastics exhibited significantly variation with aging times. Overall, promoting the marketable application of blended plastics is risky if their environmental behavior is not effectively addressed.

引用

页数：10

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