scholarly journals Impact of Chitosan Pretreatment to Reduce Microfibers Released from Synthetic Garments during Laundering

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2480
Author(s):  
Heejun Kang ◽  
Saerom Park ◽  
Bokjin Lee ◽  
Jaehwan Ahn ◽  
Seogku Kim

Sewage treatment can remove more than 90% of microplastics, yet large amounts of microplastics are discharged into the ocean. Because microfibers (MFs), primarily generated from the washing of synthetic clothes, are the most abundant type of microplastics among various microplastics detected in the sewage treatment, reducing the amount of MFs entering these treatment plants is necessary. This study aimed to test whether the amount of MFs released from the washing process can be reduced by applying a chitosan pretreatment to the garments before washing. Before the chitosan pretreatment, the polyester clothes released 148 MFs/L, whereas 95% of MFs were reduced after the chitosan pretreatment with 0.7% of chitosan solution. The chitosan pretreatment was applied to other types of garments, such as polyamide and acrylic garments, by treating them with 0.7% of chitosan solution; subsequently, MFs reduced by 48% and 49%, respectively. A morphology analysis conducted after washing revealed that chitosan coating on the polyamide and acrylic were more damaged than on polyester, suggesting that the binding strength of polyamide and acrylic with chitosan was weaker than that of polyester garment. Thus, the results suggested that the chitosan pretreatment might be a promising solution for reducing the amount of MFs generated in the laundering process.

2021 ◽  
Author(s):  
heejun kang ◽  
Saerom Park ◽  
Bokjin Lee ◽  
jaehwan ahn ◽  
Seog-Ku Kim

Abstract Sewage treatment is known to be able to remove more than 90% of microplastics; nevertheless, a considerable amount of microplastics is eventually discharged into the ocean. Given that microfibers (MFs) primarily generated from the washing of synthetic clothes are the most abundant type of microplastics among various microplastics detected in the sewage treatment, it is necessary to reduce the amount of MFs entering these plants. This study aimed to reduce the amount of MFs released from the washing process by applying a chitosan pretreatment to the garments before the washing. In this study, before the chitosan pretreatment, the polyester clothes released 148 MFs/L, whereas a 95% MFs generation reduction was observed after the chitosan pretreatment using a 0.7% of chitosan solution. Other types of garments, such as polyamide and acrylic garments, were treated with a 0.7% of chitosan solution, and this resulted in the reduction of MFs generation by 48% and 49%, respectively. Therefore of the morphology analysis after the washing, chitosan coating on polyamide and acrylic were more damaged than on polyester. It suggests that the binding strength of polyamide and acrylic with chitosan were weaker than of polyester coated with chitosan. Thus, the results of this study suggest that chitosan pretreatment is a promising solution for reducing the amount of MFs generated in the laundering process.


2017 ◽  
Vol 1 ◽  
pp. 60
Author(s):  
Isma Masrofah

Abstract – Textile industry is one of the waste contamination industries that can pollute the environment, so that the rapid development of textile industry must be followed by the improvement of its sewage treatment system. Along with the global issue of Green Manufacturing, the textile industry waste treatment can promote environmentally friendly waste treatment process and derived from renewable substances. Therefore, it is necessary to study the utilization of rice husk silica in the processing of textile waste. The results of the study provide information that textile wastes come from all processes in the textile industry, from pretreatment to finishing. Rice husk ash silica is a material utilized adsorption of textile waste or mixture of PolyVinylChloride (PVC) membrane material to filter textile waste. The characteristics of rice husk silica are influenced by the extraction method. The initial washing process using acid and then combustion at 600 ° C - 750 ° C produces a relatively high purity of silica with a maintained silica amorphous level.Keywords: Rice Husk Silica, Textile Waste, Textile Waste Processing, Silica Characteristic


Coatings ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 317 ◽  
Author(s):  
Dan Xu ◽  
Jing Wang ◽  
Dan Ren ◽  
Xiyu Wu

To explore the influences of chitosan coating structure and structure changes during storage on egg preservation, eggs coated by chitosan solution for single time (CS1), two times (CS2), and three times (CS3) were prepared separately and stored with untreated eggs (CK1), eggs washed by water (CK2) and eggs treated by acetic acid solution (CK3) at 25 °C, 80% RH. The weight loss, Haugh unit, yolk index, albumen pH, eggshell morphologies and infrared (FTIR—Fourier Transform Infrared) spectra of all the samples were monitored. CS2 and CS3 presented the lowest weight loss, highest Haugh unit and yolk index, stabilized pH, and the highest thickness of chitosan coating layers (>2 μm) among all the groups, which extended egg shelf life for 20 days longer compared to CK1 and CK2. CS1 with very thin chitosan coating showed similar egg qualities with CK3, which are second only to CS2 and CS3. Furthermore, destructions were found on chitosan coatings during storage as revealed by the eggshell morphologies and FTIR spectra, which caused the quality deterioration of eggs. The results demonstrated that eggs with the thickest coating showed the best qualities during storage, while destructions on coating layers led to the quality drop of eggs.


Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2988
Author(s):  
Sola Choi ◽  
Miyeon Kwon ◽  
Myung-Ja Park ◽  
Juhea Kim

Microplastics reach the aquatic environment through wastewater. Larger debris is removed in sewage treatment plants, but filters are not explicitly designed to retain sewage sludge’s microplastic or terrestrial soils. Therefore, the effective quantification of filtration system to mitigate microplastics is needed. To mitigate microplastics, various devices have been designed, and the removal efficiency of devices was compared. However, this study focused on identifying different fabrics that shed fewer microplastics. Therefore, in this study, fabric-specific analyses of microplastics of three different fabrics during washing and drying processes were studied. Also, the change in the generation of microplastics for each washing process of standard washing was investigated. The amount of microplastics released according to the washing process was analyzed, and the collected microplastics’ weight, length, and diameter were measured and recorded. According to the different types of yarn, the amount of microplastic fibers produced during washing and drying varied. As the washing processes proceed, the amount of microplastics gradually decreased. The minimum length (>40 µm) of micro-plastics generated were in plain-woven fabric. These results will be helpful to mitigate microplastics in the production of textiles and in selecting built-in filters, and focusing on the strict control of other parameters will be useful for the development of textile-based filters, such as washing bags.


Author(s):  
Andra Tersiana Wati ◽  
Elok Pawening Maharani

Fruits are a type of perishable agricultural product. One of the post-harvest handling efforts to maintain the freshness of the fruit is chitosan coating. Research has been carried out on various level concentration of chitosan as a coating for grapes (Vitis vinifera) and storage time. This study aims to determine the effect of chitosan concentration on water content,  color and brix of red grapes after storage. Chitosan coating was carried out by immersion methods at various levels of chitosan concentration, namely 0%, 0.5%, 1%, 1.5% and 2% (w/v) with immersion times of 30 seconds and 60 seconds. Based on the statistical test, it is shown that the chitosan concentration of 1.5% (w/v) with immersion time of 60 seconds and storage time on the 5th day is the most optimum for the brightness level of the grapes because the chitosan layer can close the pores of red grapes so that the respiration process aerobic and CO2 which affect color can be inhibited by chitosan solution. Keywords: Chitosan, edible coating, grape, post harvest, shelf life


2007 ◽  
Vol 13 (4) ◽  
pp. 317-322 ◽  
Author(s):  
J. Wang ◽  
B. Wang ◽  
W. Jiang ◽  
Y. Zhao

Chitosan-based coatings were used to delay ripening and prolong shelf-life of mango fruit stored at 15±1°C and 85—90% RH for 35 days. Mango fruits were treated with 2% chitosan solution or with 2% chitosan containing 1% tea polyphenols (TP—chitosan). Samples were taken at regular intervals for analysis. Results indicated that chitosan coating alone could decrease the decay incidence and weight loss, and delay the change in colour, pH and titratable acidity of mango fruit during storage. While coating the fruit with TP—chitosan was more effective at keeping quality of the fruit during storage. Firmness of the control fruit declined rapidly to 18.6 N after 5 days of storage at 15°C, which was 22.8% or 71.5% lower than that of the fruit treated with chitosan or TP—chitosan, respectively. Sensory quality of mango was enhanced significantly by the TP—chitosan coating compared with chitosan coating alone. These results suggested that treatment with chitosan containing TP exhibited high potential for shelf-life extension of mango fruit.


Food Research ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 240-247
Author(s):  
M.L. Rahman ◽  
R. Barua ◽  
A.A. Jubayer ◽  
J.M.M. Islam ◽  
A.H.M. Kamal ◽  
...  

In Bangladesh, dry fishes are mostly produced by drying in an open environment under sunlight, and so the producers are forced to use insecticides and fungicides to prevent microbial and blowfly infestation. That is why dry fishes are often contaminated with residual insecticides and fungicides, which cause a severe threat to human health. In this experiment, gamma radiation treated chitosan solution was used while drying the fishes, and the effect was evaluated. Experimental results suggested that chitosan coating did not hinder the drying process but improved the quality of the produces. Chitosan coating was found as a repellant of blowflies as well. Besides, it also prevented microbial contamination. The nutritional value of the produced dry fishes was examined and found very satisfactory. Overall results suggested that the application of irradiated chitosan can be a very suitable and cost-effective way to produce safe and healthy dry fishes.


2018 ◽  
Vol 67 ◽  
pp. 16-23
Author(s):  
Nehar Parvin ◽  
M.A. Kader ◽  
Roksana Huque ◽  
M.E. Molla ◽  
Mubarak A. Khan

The effect of irradiated chitosan coating on post-harvest preservation of tomato was observed in this study. Irradiated chitosan (40 kGy) solution of various concentrations (500, 750, 1000, 1500 and 2000 ppm) were applied on post-harvest preservation of tomato. Both chitosan treated and untreated (control) tomato were stored at room temperature in open and zip bag conditions. The effect of coating of various chitosan solutions on tomato were observed during storage period. The percentage of weight loss and spoilage rate of the preserved and control tomato samples were investigated. Several parameters (such as total bacteria count, total mold count, moisture, ash, acidity, vitamin C, sugar, protein and fat) were analyzed for irradiated chitosan coated tomato in open condition after 3-weeks storage period. In addition, the same parameters were also analyzed for control tomato. Considering all parameters, the results revealed that 1500 ppm chitosan solution performed better in extending the shelf- life of tomato as compared to the control and other treated samples. Thus, this observation recommend that irradiated chitosan coating have the potential to be used as natural preservative to maintain quality and extending shelf-life of tomato.


2019 ◽  
Vol 23 (1) ◽  
pp. 92 ◽  
Author(s):  
Laila Salim Al-Naamani

In the current study, chitosan coatings were fabricated on plastic substrata and investigated for their antifouling activities. Scanning Electron Microscopy (SEM) and water contact angle measurement (WCA) of the fabricated chitosan films showed smooth and hydrophilic surface with WCA below 60°. Chitosan coating on plastic substrate showed 88% reduction in settlement of bryozoan Bugula neritina larvae compare to the control after 3 hours incubation in dark conditions with no larval mortality during the experiment. The antimicrobial activity of chitosan was evaluated by coating of plastic panels with the prepared chitosan solution and immersing the coated samples in seawater with controlled environmental conditions. Biofilms scraped from immersed chitosan coated panels showed no bacteria after 1 week immersion. After the second week of immersion, less than 1500 bacteria/mm2 was observed on the chitosan-coated panels compared to more than 105 bacteria/mm2 on uncoated ones. Thus, this study prove the efficiency of chitosan coatings against micro- and macro-fouling.


Author(s):  
Laila Salim Al-Naamani

In the current study, chitosan coatings were fabricated on plastic substrata and investigated for their antifouling activities. Scanning Electron Microscopy (SEM) and water contact angle measurement (WCA) of the fabricated chitosan films showed smooth and hydrophilic surface with WCA below 60°. Chitosan coating on plastic substrate showed 88% reduction in settlement of bryozoan Bugula neritina larvae compare to the control after 3 hours incubation in dark conditions with no larval mortality during the experiment. The antimicrobial activity of chitosan was evaluated by coating of plastic panels with the prepared chitosan solution and immersing the coated samples in seawater with controlled environmental conditions. Biofilms scraped from immersed chitosan coated panels showed no bacteria after 1 week immersion. After the second week of immersion, less than 1500 bacteria/mm2 was observed on the chitosan-coated panels compared to more than 105 bacteria/mm2 on uncoated ones. Thus, this study prove the efficiency of chitosan coatings against micro- and macro-fouling.


Sign in / Sign up

Export Citation Format

Share Document