Dear Colleagues,

Bioplastics have recently begun to form a big part of our everyday life as consumers and are expected to continue to do so at an exponential rate following various key legislations around the world imposing a ban on several types of conventional plastics (e.g., Directive 2019/904/EU, ban of nondegradable plastics in China by the end of 2022). Bioplastics is a generic term that is often confused with biodegradable plastics. A bioplastic may be biobased, but not biodegradable, whilst there are cases of petrochemical (conventional) plastics that can be biodegradable. Most research on the biodegradability of bioplastics has dealt with aerobic (composting) environments; as a result, the term “compostable” differs from the term “biodegradable”. A lot of standards (ASTM, CEN, ISO) exist on how to assess the biodegradability of bioplastics, primarily under aerobic environments. In addition, new bioplastics are manufactured every year with the goal to make them readily degradable and durable, as conventional plastics, and to keep their cost relatively low and comparable to that of petrochemical plastics—something which is not yet the case, as the latter still remain less expensive. The valorization of organic wastes to manufacture novel bioplastics is gaining a lot of attention, too. In some countries, the use of biodegradable plastics is mandatory during the separate collection of biowaste. How biodegradable are those bioplastics, however? Can they be only degraded, and how fast, and what can be their impact on the recycling of conventional plastics if accidentally mixed with them?

The goal of this Special Issue is to tackle some of the above issues in order to highlight the role of bioplastics under a circular economy framework. This SI therefore welcomes manuscripts on the following topics as regards bioplastics:

• Biodegradable vs. compostable vs. oxodegradable bioplastics;
• Conversion of organic wastes to bioplastics;
• Other novel materials to manufacture bioplastics;
• Aerobic and anaerobic biodegradability;
• Gaps in existing standards to assess their biodegradability;
• Compostable bioplastics at the industrial scale;
• Chemical recycling;
• Impact of bioplastics on the recycling of conventional plastics;
• Indexes to assess their biodegradation;
• Economics of their production and use;
• Life cycle analyses and carbon footprint of their production and use;
• Microplastics generated from bioplastics;
• Bioplastics in marine environments.

Dr. Dimitrios Komilis
Dr. Spyridoula Gerassimidou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Environments is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• bioplastics
• biodegradable plastics
• biobased plastics
• oxodegradable plastics
• compostable plastics
• economics
• life cycle analysis
• microplastics
• marine environments
• waste valorization