Biodegradation of expanded polystyrene and low-density polyethylene foams in larvae of Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae): Broad versus limited extent depolymerization and microbe-dependence versus independence
文献类型：期刊论文
| 作者 | Yang, Li; Gao, Jie; Liu, Ying; Zhuang, Guoqiang; Peng, Xiawei; Wu, Wei-Min; Zhuang, Xuliang
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021-01 |
| 卷号 | 262页码:- |
| 关键词 | Mealworm Plastic Biodegradation Microbiome Low density polyethylene Expanded polystyrene |
| ISSN号 | 0045-6535 |
| 英文摘要 | Yellow mealworms (Tenebrio molitor larvae) are capable of biodegrading polystyrene (PS) and low-density polyethylene (LDPE). This study tested biodegradation of one expanded PS (EPS) with a weight-average molecular weight (M-w) 256.4 kDa and two LDPE foams with respective M-w of 130.6 kDa (PE-1) and 288.7 kDa (PE-2) in T. monitor larvae obtained in Beijing, China. The larvae consumed EPS and both LDPEs over a 60 day. Fourier transform infrared spectroscopy and thermogravimetric analyses of frass confirmed the formation of new oxygen-containing functional groups, as well as a change in physical property and chemical modification, indicating that biodegradation of EPS and LDPE occurred. Gel permeation chromatography analysis confirmed broad depolymerization of EPS and PE-1 (i.e., a decrease in both M-w and a number-average molecular weight (M-n)) but revealed limited extent depolymerization of PE-2 (i.e., increase in M-n and decrease in M-w). For all materials, the size-average molecular weight (M-z) was decreased. Biodegradation and oxidation of EPS and LDPE were confirmed using FTIR and TGA analysis. Depression of gut microbes by the antibiotic gentamicin resulted in significant inhibition of EPS depolymerization but did not stop LDPE depolymerization, resulting in the increase in M-n and revealing that PS biodegradation was gut microbe-dependent but LDPE biodegradation was less dependent or independent of gut microbes. Gut microbial community analysis indicated that, as expected, under different dietary conditions, the intestinal flora significantly shifted to communities associated with biodegradation of EPS and LDPE. The results indicated the complexity and limitation of biodegradation of plastics in plastics-eating T. molitor larvae. (C) 2020 Published by Elsevier Ltd. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46099]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Stanford Univ, Dept Civil & Environm Engn, William & Cloy Codiga Resource Recovery Ctr, Ctr Sustainable Dev & Global C 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing 100085, Peoples R China 3.Beijing Forestry Univ, Coll Biol Sci & Technol, Beijing 100083, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Li,Gao, Jie,Liu, Ying,et al. Biodegradation of expanded polystyrene and low-density polyethylene foams in larvae of Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae): Broad versus limited extent depolymerization and microbe-dependence versus independence[J]. CHEMOSPHERE,2021,262:-. |
| APA | Yang, Li.,Gao, Jie.,Liu, Ying.,Zhuang, Guoqiang.,Peng, Xiawei.,...&Zhuang, Xuliang.(2021).Biodegradation of expanded polystyrene and low-density polyethylene foams in larvae of Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae): Broad versus limited extent depolymerization and microbe-dependence versus independence.CHEMOSPHERE,262,-. |
| MLA | Yang, Li,et al."Biodegradation of expanded polystyrene and low-density polyethylene foams in larvae of Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae): Broad versus limited extent depolymerization and microbe-dependence versus independence".CHEMOSPHERE 262(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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