生物降解
凝胶渗透色谱法
解聚
化学
傅里叶变换红外光谱
聚苯乙烯
魔角纺纱
食品科学
矿化(土壤科学)
热重分析
残留物(化学)
色谱法
核磁共振波谱
核化学
有机化学
化学工程
聚合物
工程类
氮气
作者
Yu Yang,Jun Yang,Wei‐Min Wu,Jiao Zhao,Yiling Song,Longcheng Gao,Ruifu Yang,Lei Jiang
标识
DOI:10.1021/acs.est.5b02661
摘要
Polystyrene (PS) is generally considered to be durable and resistant to biodegradation. Mealworms (the larvae of Tenebrio molitor Linnaeus) from different sources chew and eat Styrofoam, a common PS product. The Styrofoam was efficiently degraded in the larval gut within a retention time of less than 24 h. Fed with Styrofoam as the sole diet, the larvae lived as well as those fed with a normal diet (bran) over a period of 1 month. The analysis of fecula egested from Styrofoam-feeding larvae, using gel permeation chromatography (GPC), solid-state (13)C cross-polarization/magic angle spinning nuclear magnetic resonance (CP/MAS NMR) spectroscopy, and thermogravimetric Fourier transform infrared (TG-FTIR) spectroscopy, substantiated that cleavage/depolymerization of long-chain PS molecules and the formation of depolymerized metabolites occurred in the larval gut. Within a 16 day test period, 47.7% of the ingested Styrofoam carbon was converted into CO2 and the residue (ca. 49.2%) was egested as fecula with a limited fraction incorporated into biomass (ca. 0.5%). Tests with α (13)C- or β (13)C-labeled PS confirmed that the (13)C-labeled PS was mineralized to (13)CO2 and incorporated into lipids. The discovery of the rapid biodegradation of PS in the larval gut reveals a new fate for plastic waste in the environment.
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