New insights into the biodegradation of polylactic acid: from degradation to upcycling

被引：22

作者：

Xu, Bin ^{[1
]}

Chen, Yinping ^{[1
]}

He, Jie ^{[1
]}

Cao, Shixiang ^{[1
]}

Liu, Jiawei ^{[1
]}

Xue, Rui ^{[1
]}

Xin, Fengxue ^{[1
,2
]}

Qian, Xiujuan ^{[1
]}

Zhou, Jie ^{[1
]}

Dong, Weiliang ^{[1
,2
]}

Jiang, Min ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Coll Biotechnol & Pharmaceut Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211800, Peoples R China

[2] Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 211800, Peoples R China

来源：

ENVIRONMENTAL REVIEWS | 2022年 / 30卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Key words; PLA; biodegradation; microorganisms; enzymes; upcycling; POLY(LACTIC ACID); POLY(L-LACTIC ACID); POLY(L-LACTIDE)-DEGRADING ENZYME; DEGRADING MICROORGANISMS; AMYCOLATOPSIS-ORIENTALIS; MICROBIAL CONSORTIUM; WASTE PLASTICS; LACTIC-ACID; PLA; PURIFICATION;

D O I：

10.1139/er-2020-0117

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Owing to its biosynthetic and biodegradable properties, polylactic acid (PLA) is considered to be a most promising biopolymer that could play a crucial role as a potentially environmentally friendly material for a sustainable bioeconomy. However, its long-life cycle indicates that it cannot be easily degraded in nature. Therefore, understanding the biodegradation mechanism of PLA is important for reducing the impacts of waste plastic and waste disposal. With the recent development of molecular biology techniques, some studies have confirmed that specific groups of microorganisms can facilitate the biodegradation of PLA. Here, recent advances in the biodegradation of PLA (i.e., microbial and enzymatic degradation) and key factors affecting the degradation efficiency were reviewed. In addition, compared with complete degradation through mineralization, upcycling is also proposed as a more recyclable strategy for disposing of waste plastics.

引用

页码：30 / 38

页数：9

共 81 条

[1] Cloning and sequencing of a poly(DL-lactic acid) depolymerase gene from Paenibacillus amylolyticus strain TB-13 and its functional expression in Escherichia coli [J].