The rate of biodegradation of PHA bioplastics in the marine environment: A meta-study

被引：170

作者：

Dilkes-Hoffman, Leela Sarena ^{[1
]}

Lant, Paul Andrew ^{[1
]}

Laycock, Bronwyn ^{[1
]}

Pratt, Steven ^{[1
]}

机构：

[1] Univ Queensland, Fac Engn Architecture & Informat Technol, Sch Chem Engn, St Lucia, Qld 4072, Australia

来源：

MARINE POLLUTION BULLETIN | 2019年 / 142卷 / 15-24期

关键词：

Biodegradable; Plastic; Biopolymer; PHB; Aquatic; Lifetime; MICROBIAL-DEGRADATION; LIFETIME PREDICTION; POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE); POLY(3-HYDROXYBUTYRATE); POLYHYDROXYALKANOATES; POLYESTERS; FILMS; POLY(EPSILON-CAPROLACTONE); POLYMERS; BIOFILMS;

D O I：

10.1016/j.marpolbul.2019.03.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

There is a reasonably extensive body of literature recording mass loss of polyhydroxyalkanoates (PHAs) (a class of biodegradable plastics) in the natural marine environment. However, to date, this research has been very disparate. Thus, it remains unclear what the timeframe for the biodegradation of such marine biodegradable plastics actually is. The aim of this work was to determine the rate of biodegradation of PHA in the marine environment and apply this to the lifetime estimation of PHA products. This provides the clarification required as to what 'marine biodegradation of PHA' means in practicality and allows the risks and benefits of using PHA to be transparently discussed. It was determined that the mean rate of biodegradation of PHA in the marine environment is 0.04-0.09 mg.day(-1).cm(-2) (p = 0.05) and that, for example, a PHA water bottle could be expected to take between 1.5 and 3.5 years to completely biodegrade.

引用

页码：15 / 24

页数：10

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