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A review on the biodegradation of textiles in the environment
Summary
Researchers reviewed how textile composition, production processes, and environmental conditions influence biodegradation rates in natural settings, finding that synthetic fibres persist far longer than cellulosic alternatives and that fragmentation into microfibers during degradation represents an understudied pathway for environmental microplastic release.
Research on the environmental impact of textiles has grown in recent years although relatively scant attention has been given to the effects of the textile production process and environmental conditions on textile fates in the environment. Most work has focused on synthetic fibres, and where cellulosic materials have been studied, they have been assumed to be 'natural', despite textile production processes mean this is often not the case. This review article synthesises current work published on the biodegradation of fibres in the environment to guide future research in the field and better understand environmental fate. Biodegradation of cellulosic textile materials, ranges between 10-89% with variation measured between environments and textile characteristics. This is greater than reported for synthetic textiles (not exceeding 5% degradation). As has been reported in many studies of plastics in the environment, large variation exists in the reported biodegradation data due to differences in the methodologies used, particularly in terrestrial environments. Standardised methods have been widely applied to biodegradation studies which typically elevate temperatures and inoculate environments with microorganisms that would not naturally occur in natural environments. This had led to enhanced levels of biodegradation occurring in these experiments. Studies measuring biodegradation under more natural conditions, including lower temperatures and naturally occurring inoculums, have reported biodegradation 42% lower than when higher temperatures were maintained. Biodegradation has been reported to be reduced following the application of reactive dyes, water repellents, easy-care finishes and antimicrobial treatments. Consideration of the impact of chemical dyes and finishes on biodegradation levels is needed alongside environmentally representative biodegradation studies to develop a more in depth understanding of the environmental fate of microfibre pollution.