Plastic waste has become a problem recognized worldwide for its harmful effects on the environment. Even though plastic is a ubiquitous part of our daily lives and we interact with it frequently, its persistence in the environment leads to significant negative repercussions due to its thousands of years-long biodegradation process. Unfortunately, each year, more than 400 million tons of plastic are produced, and a large quantity of it finds its way into oceans, endangering aquatic life and putting human health at risk.
Fortunately, spectroscopy plays a crucial role in combatting plastic pollution. If the term “spectroscopy” is unfamiliar to you, fear not! We will provide you with a comprehensive explanation to demystify this intricate science. Let’s delve into how spectroscopy contributes to the fight against plastic pollution.
Threat of Plastic Pollution Impact
Regrettably, the extensive use of plastic has led to adverse environmental impacts, causing harm to various species and ecosystems. Plastic can take thousands of years to degrade, sparking heightened concerns regarding plastic pollution in recent years as efforts to combat it intensify. For instance, to illustrate the issue, consider the longevity of plastic bottles and caps, which may require approximately 450 years to decompose. Throughout this extended period, marine life can mistakenly ingest these items, such as fish, sea turtles, and seabirds, posing serious health risks to these creatures.
While plastic pollution typically affects land and oceans, surprisingly, microplastics have now infiltrated pristine natural environments untouched by direct plastic consumption. Researchers have detected plastic particles in the snow atop the Swiss and Bavarian Alps, heightening apprehensions about the potential impact of microplastics on human health.
Unfortunately, as plastic is present in every industry, it is very hard to eradicate it. People started to understand the effects of plastic pollution and took measures to fight it, like recycling and cutting down the amount of plastic they bought. However, the world has a long way to go before plastic will no longer be a problem that humans face.
Spectroscopy’s Role Against Plastic Pollution
Spectroscopy studies the interaction between electromagnetic radiation and matter, which has been used for ages in numerous cases. The roots of spectroscopy trace back to Isaac Newton’s experiments in 1666, marking the inception of a pivotal tool for scientists to glean crucial insights across various disciplines like chemistry, physics, and astronomy. Spectroscopy offers the possibility to investigate the matter on the molecular, atomic and macro scales, as well as over astronomical distances. Spectroscopy also measures the interactions between protons, electrons and ions, and lately, it has been shown that this study can also help in resolving plastic pollution.
This happens because the synthetic materials of plastic use macromolecules, including polymers. Polymers are manufactured through injection molding at low temperatures; in theory, they are easily reused or recycled. However, in some products, polymers can be blended into the plastic, so it is necessary to separate it in the recycling process, which is not that easy to do.
By utilizing Raman analysis or an NIR spectrometer, scientists can extract valuable information regarding the specific characteristics of materials. This includes determining the chemical composition, a crucial factor that enhances efficiency in the recycling process.
Additionally, as spectroscopy has improved massively over the years, now people can also use photoluminescence spectroscopy (PL), which is an even faster technique. The PL spectroscopy utilizes 200 to 850 nanometer wavelengths to measure absorption, which will provide insights into the sample material and the concentration of plastic found in a product.
Spectroscopy Sorts Plastic Recycling
Plastics contain different materials depending on the product used. For example, water bottles contain polyethylene terephthalate (PET), while grocery bags have high-density polyethylene (HDPE). As they are two distinct materials, they must be recycled differently, which can be a problem in the plastic recycling process. If we were to analyze all the types of plastic used in manufacturing, we would surely notice that plastic is not recycled correctly all the time.
But spectroscopy can help in this matter, as it can scan plastic to discover essential insights and aid people in sorting it. Spectroscopy can create a more circular economy, as it ensures that all plastic waste is disposed of and repurposed properly.
Spectroscopy Combats Plastic Pollution
In combating plastic pollution, spectroscopy’s critical role emerges as a beacon of hope. As we navigate the widespread challenges posed by plastic waste impacting our environment, the intricate field of spectroscopy steps in to offer innovative solutions. By studying the interaction between electromagnetic radiation and matter, spectroscopy delves into the molecular, atomic, and macro scales, shedding light on the intricate composition of synthetic materials like polymers prevalent in plastic products.
Companies like Avantes are revolutionizing the landscape with cutting-edge spectroscopy systems tailored for diverse industries such as agriculture, food, chemistry, medicine, and solar energy. By enabling precise material analysis and aiding in segregation processes, spectroscopy paves the way for a circular economy where plastic waste is managed effectively, fostering innovation and sustainability in the quest to combat plastic pollution.
Together, through the marriage of scientific ingenuity and technological prowess, spectroscopy stands as a powerful ally in the fight for a cleaner, greener future, ensuring that the journey toward a plastic-free world is guided by precision, insight, and unwavering determination.
