Exploring microbial degradation of polyamide 4 in soils: Unveiling degradation mechanisms, pathways, and the contribution of strain NR4

Wang, Li; Zhang, Ziwei; Zhang, Di; Qiu, Yongjun; Wang, Yibing; Quan, Shu; Zhao, Liming

doi:10.1016/j.jclepro.2023.139535

Cited by 5 publications

(2 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies are focused on the biodegradation of polymers like polyethylene, polyethylene terephthalate, etc or bio-based polymers in different environments (soil, seawater, etc) and different microorganisms and enzymes have been identified [9][10][11][12]. Egan et al [4] reported and listed some of the enzymes capable of catalyzing the depolymerization of common textile polymers in the primary degradation steps (and the related products).…”

Section: Introductionmentioning

confidence: 99%

“…Especially due to their hydrophobic and crystalline features, these polymers are generally recalcitrant to biodegradation [14], taking 30 to 40 years to break and another hundred years to decay completely [15]. Nevertheless, Wang et al [9], for instance, subjected films of polyamide 4 to biodegradation in four types of soils. The results showed that the highest degradation occurred in composted soil in 60 days since almost no residual films were observed therein with respect to other soil types.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Behavior of polypyrrole-coated cotton fabric undergoing biodegradation in compost-enriched soil

Piccioni,

Varesano,

Tummino

2024

Environ. Res. Commun.

View full text Add to dashboard Cite

This study investigated the biodegradation behavior of cotton fabrics treated with polypyrrole, a polymer with conductive and antibacterial properties. Fabric samples were buried in compost-enriched soil for 10, 30 and 90 days. The biodegradation level was initially estimated by a visual inspection of the fibers and by the determination of the fabric weight loss. Other physical-chemical changes of fibers during the biodegradation process were analyzed by microscopy, thermal analyses and infrared spectroscopy. The surface resistivity of the fabrics was also measured. The results obtained comparing the bare cotton samples and the polypyrrole-added ones suggested that, on the one hand, polypyrrole hindered/delayed the biodegradation of cotton in compost-enriched soil, probably exercising its inherent antimicrobial feature during the first period of burial. On the other hand, over time, polypyrrole seemed to represent the first compound attacked by the microorganisms, preserving the cotton substrate. Despite the absence of dedicated literature regarding polypyrrole biodegradation, the mechanism hypothesized in this paper involves the loss of conjugation, as a consequence of de-doping, oxidized functionalities up to local cycle breaking.

show abstract