Natural colorants from vegetable food waste



by LORENZO CIOTTI

Natural colorants from vegetable food waste

Natural colorants from vegetable food waste: Recovery, regulatory aspects, and stability-A review, published on the Comprehensive reviews in food science and food safety, explained in its research: "Worldwide, approaches inspired by the Circular Economy model have been increasing steadily, generating new business opportunities such as the recovery of high-added value molecules (e.g., pigments) from vegetable food waste that may be applied as food additives.

Indeed, food waste is a global problem that does not seem to be decreasing, leading to economic, environmental, and social issues. Moreover, synthetic dyes have been associated with adverse effects on human health, encouraging research to explore much safer, natural, and eco-friendly pigments.

This state-of-the-art review gives a brief overview of the regulatory aspects concerning food waste, Circular Economy, and natural versus synthetic colorants. We have critically reviewed the recent advances in pigment recovery from vegetable food waste bringing back the green / unconventional extraction methods.

Among them, enzyme-assisted extraction as a depth feature technique is highlighted, given that it allows the re covery of pigments in a mild, selective, efficient, and sustainable way. Furthermore, the stability issue of the different natural colorants has been critically discussed in relation to the extraction and application conditions.

Several and tailored stabilization methods have been described and reported for each pigment although additional research is necessary on their long-lasting stabilization and utilization in food matrices. PRACTICAL APPLICATION: This review focuses on the main types of natural pigments in vegetable food waste, their legislative framework, extraction technologies and strategies to improve the stability, as well as their possible applications."

Microplastic pollution in china and food delivery services

Microplastics persist in the environment in large quantities, especially in marine and aquatic ecosystems.

This is because plastic deforms but does not break for many years, it can be ingested and accumulated in the body and tissues of many organisms. The entire cycle and movement of microplastics in the environment has not yet been studied in depth, especially due to the difficulty of analyzing a mixture of various types of more or less inert plastics.

Microplastics pose a serious threat to small marine living beings, which tend to feed on them, mistaking them for plankton. These minor organisms are in turn inserted into the food chain and ingested by larger living beings and their predators.

The chain can continue until it reaches our tables. Controlling the release of these plastics into the environment therefore means safeguarding marine fauna. Many marine animals such as seagulls or seals have ingested microplastics, affecting health.

The study: Microplastic Pollution in China, an Invisible Threat Exacerbated by Food Delivery Services, published on the Bulletin of environmental contamination and toxicology, explains: "With the rapid development and democratization of the internet and smart phone industry, online food delivery services have become increasingly popular all over the globe, namely in China.

One of the unfortunate drawbacks of these delivery services is that they mainly use single-use plastics as food packaging, therefore generating large amounts of disposable food containers to meet demand. Such plastic containers reach the end of their service life after a single meal, and are then discarded as plastic waste.

The sheer amount of plastic food containers discarded in this manner exacerbates various environmental issues, including one that is invisible to the naked eye: microplastic pollution. This minireview summarizes the history of food delivery services in China, from orders made face-to-face to digita l orders, as well as the consequences introduced by the tremendous amounts of plastic waste generated by the food delivery services.

Microplastic pollution could be mitigated to a certain extent by improving the classification, handling and management of single-use plastic containers in China. Furthermore, additional studies focusing on microplastic pollution caused by food delivery services are needed, especially as the use of these services is on the rise worldwide. "