Sponge-like biodegradable polypyrrole-modified biopolymers for selective adsorption of basic red 46 and crystal violet dyes from single and binary component systems

Benhalima, Tayeb; Chicha, Walid; Ferfera-Harrar, Hafida

doi:10.1016/j.ijbiomac.2023.127532

Cited by 25 publications

(1 citation statement)

References 89 publications

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“…In the case of PPy-treated samples, they showed non-significant or slight weight losses, reaching a maximum of 7%. From a purely gravimetric comparison with other works in the literature, the present result demonstrated an important stability of the PPy coating on cotton, whereas, for instance, in the paper of Benhalima et al [49], hydrogels based on alginate and gelatin, despite of the addition of polypyrrole, were almost entirely biodegraded after six months. Zare et al [42] reported that the degradation level of polypyrrole/dextrin composites was up to 74.5% in two months for the samples with low PPy:dextrin ratio, whereas for a higher presence of polypyrrole, the material after burial remained intact.…”

Section: Initial Biodegradation Assessmentsupporting

confidence: 68%

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

Piccioni,

Varesano,

Tummino

2024

Environ. Res. Commun.

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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.

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Section: Initial Biodegradation Assessmentsupporting

confidence: 68%

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

Piccioni,

Varesano,

Tummino

2024

Environ. Res. Commun.

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Enhanced Photodegradation of Imidacloprid Using ZnO@Ca‐Alginate Composites: Optimization of pH and pHzcp for Effective Water Treatment

Zyoud,

Zyoud

et al. 2024

ChemistrySelect

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This research focused on the photodegradation of the insecticide imidacloprid (IM) via a ZnO@Ca‐Alginate composite catalyst to address water contamination issues, particularly in agricultural areas such as Palestine. The composite was synthesized and characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), energy dispersive X‐ray (EDX), thermogravimetric analysis (TGA), and Fourier transform infrared (FT‐IR) spectroscopy, confirming the presence of ZnO. Photocatalytic experiments under simulated solar light revealed significant IM degradation, with a 50 % reduction in 40 minutes, an 80 % reduction in 2 hours, and up to 94 % in 3 hours. The degradation efficiency was influenced by the point of zero charge (pHzcp) and solution pH, with optimal performance under neutral to slightly basic conditions. UV‐visible spectrophotometry, high‐performance liquid chromatography (HPLC), and total organic carbon (TOC) analyses verified complete IM mineralization, yielding CO₂, Cl−, and NO₃− after 3 hours. The ZnO@Ca‐Alginate composite demonstrated high reusability, highlighting its potential for treating pesticide‐contaminated water. This study emphasizes the need for efficient pollutant removal technologies in regions where agricultural pollutants are prevalent.

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Recent trends in remediating Basic Red 46 dye as a persistent pollutant from water bodies using promising adsorbents: a review

Kaci,

Akkari,

Pazos

et al. 2024

Clean Techn Environ Policy

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Sponge-like biodegradable polypyrrole-modified biopolymers for selective adsorption of basic red 46 and crystal violet dyes from single and binary component systems

Cited by 25 publications

References 89 publications

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

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

Enhanced Photodegradation of Imidacloprid Using ZnO@Ca‐Alginate Composites: Optimization of pH and pHzcp for Effective Water Treatment

Recent trends in remediating Basic Red 46 dye as a persistent pollutant from water bodies using promising adsorbents: a review

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