Release time：2023-09-22 Number of views: 16
title：The Biodegradable Plastic: Unraveling its Decomposition Process
Plastic waste is a significant problem worldwide, causing environmental pollution and posing a threat to ecosystems. To combat this issue, scientists have developed biodegradable plastics that can break down naturally over time. This article aims to explore the time it takes for biodegradable plastics to decompose and delve into the factors that influence the decomposition process.
I. Understanding Biodegradable Plastics:
Biodegradable plastics are polymers derived from renewable sources, such as vegetable oils, starches, or cellulose. Compared to traditional plastics, these materials can be decomposed into smaller molecules by microorganisms, eventually returning to nature.
II. Decomposition Process:
1. Types of Biodegradable Plastics: There are two primary categories of biodegradable plastics: bioplastics and oxo-biodegradable plastics. Bioplastics decompose through microbial activity, while oxo-biodegradable plastics require exposure to UV radiation and oxygen to break down.
2. Influential Factors:
a) Environmental Conditions: The decomposition process of biodegradable plastics is influenced by factors such as temperature, humidity, and the presence of microorganisms. Optimal conditions foster the growth of bacteria and fungi, accelerating the breakdown.
b) Chemical Composition: The type and proportion of materials used in the production of biodegradable plastics affect their decomposition rate. Some variants decompose more rapidly than others due to their specific chemical structure.
III. Decomposition Time:
1. Bioplastics: On average, bioplastics take approximately three to six months to decompose. However, the rate may vary depending on the plastic's composition and environmental conditions. For instance, compostable bioplastics degrade relatively faster in industrial composting facilities.
2. Oxo-biodegradable Plastics: Oxo-biodegradable plastics can decompose within one to five years. As they require exposure to UV radiation, oxygen, and heat, their decomposition rate is slower than bioplastics.
IV. Renewability and Recycling:
While biodegradable plastics offer a more eco-friendly option, they are not a complete solution to plastic waste. Recycling and reusing traditional plastics should still be prioritized to minimize the use of resources. Additionally, the production of biodegradable plastics relies heavily on renewable energy and sustainable practices.
V. Pros and Cons:
1. Advantages: Biodegradable plastics reduce dependence on fossil fuels, decrease greenhouse gas emissions, and aid in waste management. They also have applications in various industries, including packaging and agriculture.
2. Limitations: Biodegradable plastics require specific environmental conditions for effective decomposition. If not disposed of properly, they can contaminate recycling streams and harm the environment. Additionally, the increased demand for biodegradable plastics may lead to deforestation and monoculture farming.
Biodegradable plastics offer a promising solution to the global plastic waste crisis. While they have the potential to decompose within a relatively short time frame, their effectiveness largely depends on proper disposal and the provision of optimal environmental conditions. Concerted efforts must be made to educate individuals about responsible disposal practices and promote recycling to reduce plastic pollution. Moreover, research and development should continue to enhance the efficiency and accessibility of biodegradable plastics, ensuring a sustainable future for our planet.