Biodegradation of silver functionalised cellulose fibres

Klemenčič, Danijela; Simončić, Barbara; Tomšič, Brigita; Orel, B.

doi:10.1016/j.carbpol.2009.11.049

Cited by 65 publications

(43 citation statements)

References 44 publications

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“…ey surmised that these bands are characteristic for amide group and they appearance a er degradation suggesting that the proteins are bound to the residuals bres. Furthermore investigations [10,11,16,18,20,21] conrmed presence of the bands at 1640 and 1548 cm -1 belonging to the Amide I and II and are result of protein produced by microbial growth. According to reference [22] the spectra of cellulose show decrease of bands particularly at 1372 cm -1 , 1336 cm -1 , 1313 cm -1 , 1280 cm -1 ,1160 cm -1 and 1105 cm -1 when moving from high crystalline to amorphous cellulose, which indicates apart from chemical changes mentioned above that the samples are degraded.…”

Section: Composting Timementioning

confidence: 88%

Biodegradation of Natural Textile Materials in Soil

Arshad¹,

Skrifvars²,

Vivod³

et al. 2014

TEK

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World is facing numerous environmental challenges, one of them being the increasing pollution both in the atmosphere and landfi lls. After the goods have been used, they are either buried or burnt. Both ways of disposal are detrimental and hazardous to the environment. The term biodegradation is becoming more and more important, as it converts materials into water, carbon dioxide and biomass, which present no harm to the environment. Nowadays, a lot of research is performed on the development of biodegradable polymers, which can "vanish" from the Earth surface after being used. In this respect, this research work was conducted in order to study the biodegradation phenomenon of cellulosic and non-cellulosic textile materials when buried in soil, for them to be used in our daily lives with maximum effi ciency and after their use, to be disposed of easily with no harmful eff ects to the environment. This research indicates the time span of the use life of various cellulosic and non-cellulosic materials such as cotton, jute, linen, fl ax, wool when used for the reinforcement of soil. The visual observations and applied microscopic methods revealed that the biodegradation of cellulose textile materials proceeded in a similar way as for non-cellulosic materials, the only difference being the time of biodegradation. The non-cellulosic textile material (wool) was relatively more resistant to microorganisms due to its molecular structure and surface.

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Section: Composting Timementioning

confidence: 88%

Biodegradation of Natural Textile Materials in Soil

Arshad¹,

Skrifvars²,

Vivod³

et al. 2014

TEK

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“…After sintering with AgNPs, the peak at 3 keV appeared in EDX spectrum confirming the presence of silver in the composition of PCCF/AgNPs. In the study of Klemenčič et al [17] and Gusseme et al [18], the EDX spectrum was also used to confirm the presence of AgNPs in cellulose and polyvinylidene fluoride samples. Table 1 described some characteristics of as-prepared PCCF/AgNPs.…”

Section: Characteristics Of Pccf/agnpsmentioning

confidence: 99%

Bactericidal activity and silver release of porous ceramic candle filter prepared by sintering silica with silver nanoparticles/zeolite for water disinfection

Nguyen

Dang

Nguyen

et al. 2014

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Porous ceramic candle filters (PCCF) were prepared by sintering silica from rice husk with silver nanoparticles (AgNPs)/zeolite A at about 1050 °C to create bactericidal PCCF/AgNPs for water disinfection. The silver content in PCCF/AgNPs was of 300-350 mg kg −1 determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and the average pore size of PCCF/AgNPs was of 50-70 Å measured by Brunauer-Emmett-Teller (BET) method. The bactericidal activity and silver release of PCCF/AgNPs have been investigated by flow test with water flow rate of 5 L h −1 and initial inoculation of E. coli in inlet water of 10 6 CFU/100 mL. The volume of filtrated water was collected up to 500 L. Results showed that the contamination of E. coli in filtrated water was <1 CFU/100 mL and the content of silver released from PCCF/AgNPs into filtrated water was <1 μg L −1 , it is low, far under the WHO guideline of 100 μg L −1 at maximum for drinking water. Based on the content of silver in PCCF/AgNPs and in filtrated water, it was estimated that one PCCF/AgNPs could be used to filtrate of ∼100 m 3 water. Thus, as-prepared PCCF/AgNPs releases low content of silver into water and shows effectively bactericidal activity that is promising to apply as point-of-use water treatment technology for drinking water disinfection.

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“…Although NaBH 4 is not a sufficiently strong reducing agent for dyeing cotton with a vat dye [90], it is nevertheless strong enough to enhance the negative charge of the dye on the fabric [91] such that silver ions (Ag + ) from a silver colloidal solution can be electrostatically attracted to the dyed cotton surface. It was reported that while Ag + ions from a colloidal silver solution are exhausted to the anionic cotton fibers to a high degree because of the attractive electrostatic interactions, the high increase of the adsorption ability of silver nanoparticles caused by the van der Walls forces resulted from the high surface area to volume ratio of these particles [43].…”

Section: Resultsmentioning

confidence: 99%

“…Textile materials with an antimicrobial effectiveness are used for medical, military and technical textiles, textiles for sports and leisure and bedding. At nanotechnology researches in textiles, different forms of silver were used, such as metal silver nanoparticles, silver chloride (AgCl) and composite particles of silver and titanium dioxide (Ag-TiO 2 ) [3,24,25,27,[38][39][40][41][42][43][44][45][46][47]. In the case of antimicrobial efficiency, the surface coating of nanosilver on titanium dioxide maximizes the number of particles per unit area in comparison with the use of an equal mass fraction of pure silver [48,49].…”

Section: Introductionmentioning

confidence: 99%