Biodegradation of plastic-based waste materials

Inevitably, the terms “materials” and “products” differ from one another. To comprehend their potentiality in terms of mechanical, chemical, physical, and biological properties, the specifications of basic materials are verified in the laboratory. Then, materials are changed or contrived into products. As a definite form of a product, its thickness, shape, its inclination to migrate from one section to another, and so forth are regarded as the main extrinsic features; they are so essential in view of littering. However, the fundamental features of materials should be also pondered. Notably, they are supposed to be preserved while changing into final product procedures. The fact is that plastics are usually organic compounds which are synthetic or semisynthetic. They hold high molecular mass and along chain polymeric molecules is included in them. Holistically, plastics embrace side-linked molecular groups and some organic and inorganic blends added as additives, plasticizers, and fillers, and a main chain organic link. Elements such as carbon, hydrogen, nitrogen, oxygen, chlorine, and bromine are the building blocks of plastics. Plastics subject to important gains from the viewpoints of weight, durability, and low cost in terms of manufacture comparison with other materials. Since plastics can be molded into various size and shapes, they can be extensively practiced. Plastics have been exceedingly applied in every aspect of life and technology. Polyethylene (PE), polystyrene, polyvinyl chloride, polypropylene, and PE terephthalatete are among the plastics that are mostly put into practice. Plastics are vastly applied in every field such as health care industries, building constructions, transportations, households, and for disposals items, such as wraps, cups, spoons, trays plates, and so forth. Notably, all the mostly used plastics cannot be recycled. As a result, plastics are accumulated in landfills. Then, they are discharged in water. Henceforth, they do not decompose in the environment. Thus, environment and its varied ecosystems are endangered. One of the main global concerns is plastic pollution in the sea. They are found everywhere. In every square kilometer, almost 580,000 plastic pieces can be concentrated. Between 1000 and 3000 tons of plastic floating in the Mediterranean Sea has been reported. This contamination is due to the physical/mechanical degradation of macroplastics in landfills that produce microplastics that are transferred directly to rivers, seas, and oceans via leachate. Also, additives found in plastic formulations are not normally covalently bonded to polymer chains and can therefore leak from plastics and enter the marine environment. Plastics that enter the marine environment can also absorb persistent organic pollutants due to the hydrophobic properties of these compounds, or they can be a vector agent for the spread of harmful organisms living on plastic surfaces.