Application of palladium‐modified zeolite for prolonging post‐harvest shelf life of banana

Abstract

BACKGROUND The marketability of banana is limited by the rapid rate of ripening. However, the traditional post‐harvest technologies may not be desirable. The aim of this study was to investigate the potential of a reusable material for the food preservation industry. RESULTS The nanocomposite‐based palladium (Pd)‐modified zeolite (Pd/zeolite) was prepared by impregnating Pd into zeolite. Pd/zeolite had a Brunauer–Emmett–Teller dinitrogen specific surface area of 475 m2 g−1 with crystal structure similar to Y‐zeolite. Transmission electron microscopy images showed the dispersion of Pd particles over the multi‐pore zeolite support. Pd/zeolite uniquely acted as an adsorbent and a catalyst and was able to remove ethylene even after reaching breakthrough point. To prove Pd/zeolite is reusable, a 99 ± 0.8% ethylene removal efficiency still remained even after five consecutive cycles with repeated use of Pd/zeolite. The presence of Pd/zeolite significantly decreased the ethylene concentration during 18 days of storage at 20 ± 2 °C. CONCLUSIONS Pd/zeolite could delay the ripening of banana and improve its firmness and the peel color significantly. Findings indicated that the as‐prepared Pd/zeolite is an effective adsorbent/catalyst with high potential for practical application in ethylene removal, especially for the post‐harvest period. © 2019 Society of Chemical Industry

Ethylene scavengers for active packaging of fresh food produce

“…Some authors pointed out that both titratable acidity (TA) and soluble solids content (SSC) increase during the storage period of banana fruits (Gaikwad et al 2017a, b; Pongener and Mahajan 2017). However, it has been observed that changes in TA and SSC are delayed when an ethylene scavenger based on KMnO 4 is combined into the banana packages (Tzeng et al 2019). Tas et al (2017) developed novel halloysite nanotubes/polyethylene (HNT/PE) nanocomposites as an ethylene scavenging film neat PE film results showed that the banana-packaged NEAT PE film turned yellow, and several brown spots were observed; on the other hand, bananas packaged with HNT/PE films showed banana stayed free of brown spots and maintained green colour.…”

“…Tas et al (2017) developed novel halloysite nanotubes/polyethylene (HNT/PE) nanocomposites as an ethylene scavenging film neat PE film results showed that the banana-packaged NEAT PE film turned yellow, and several brown spots were observed; on the other hand, bananas packaged with HNT/PE films showed banana stayed free of brown spots and maintained green colour. Recently, Tzeng et al (2019) developed and applied palladium-modified zeolite-based scavenger for delaying shelf life of a banana. Results showed that the palladium-modified zeolite delayed the ripening of banana and recovered its firmness and the peel colour of fruit significantly.…”

Mango performance as affected by the soil application of zeolite and biochar under water salinity stresses

“…Zeolites are able to adsorb CO 2 , which may influence photosynthesis, reduce leaf temperature by reflecting the infrared radiation, and consequently reduce transpiration rate, which may improve water use efficiency, yield, and the fruit quality (De Smedt et al 2017). Using zeolite in the soil of bananas after harvest could delay the ripening of banana and improved its firmness and the peel color significantly (Tzeng et al 2019) , NO 3 − , K + , and SO 4 2− and reduces nutrient leaching. Moreover, they also stated that the unique characteristics of zeolites are helpful in improving the fertilizer and water use efficiency and, increasing the growth, yield and fruit quality of crops as well as it also has a desirable influence in reducing the environmental pollution via reducing nitrate leaching and the emissions of nitrous oxides and ammonia.…”

Application of ethylene‐regulating packaging in post‐harvest fruits and vegetables storage: A review

“…Martinez‐Romero et al 70 compounded palladium (Pb) with activated carbon, and the mixed material can effectively adsorb and degrade ethylene. In addition, Tzeng et al 62 modified the zeolite with Pb. The material still maintained a high ethylene removal rate after being reused and successfully delayed the ripening of bananas.…”