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Plastic recycling research essay
Plastic recycling research essay
Plastic recycling research essay
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A. Extraction
Plastics encompass most disposable items that American use daily, such as plastic water bottles, food containers, and trash bags. Plastics are cheap, lightweight, strong, tough, and corrosion resistant and have high thermal and electrical insulation properties (Thompson et al, 2009). 3-4% of world oil and gas usage is used to manufacture plastics and 4% is used as a component of plastics. Plastics are mostly derived from petrochemicals produced from fossil oil and gas (Thompson et al, 2009). The most commonly used plastic is polypropylene, which is used to make food carriers, such as yogurt cups and Ziploc bags (Andrady, 2009). Oil and natural gas are the primary raw materials of plastics. The process begins by treating components of oil or natural gas in the cracking process. This process results in the formation of hydrocarbon monomers (ethylene, propylene). These monomers are further processed into more monomers (stryene, ethylene glycol). These monomers are then bonded together by polymerization to form a polymer backbone, a reaction carried out by addition or condensation reactions (American Chemistry Council Inc, 2005)
B. Produced
Plastics are never used alone, usually additives are used to strengthen, thermal stabilizers, colorers, UV stabilizers, and fire retardants (Andrady, 2009). These additives are blended with plastics to improve their basic attributes. Plasticizers a specific type of additive is used to increase flexibility, and is sued in film wraps and flexible tubing. There are four main methods of processing plastics, extrusion, injection molding, blow molding, and rotational molding (American Chemistry Council, Inc, 2005). In extrusion plastic pellets are heated and then forced out through a ...
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...ttles) and HDPE milk bottles, these bottles can be recovered, sanitized and reused to make new PET and HDPE bottles. HDPE bottles can also be downgraded into plastic crates and bins or the production of the creation of plastic lumber. Feedstock recycling can recover the raw materials (oil and natural gas) used to create the plastic. These recovered raw materials can be used to make new plastics or other synthetic materials. This process is sometimes uneconomical because it takes large amounts of energy to reverse the reactions that created the plastic (Hopewell et al, 2009). Source reduction is also an important resource conservation scheme that involves the use of less raw materials to create the same products. This accomplished by using less packaging of materials by redesigning products, using packaging that reduces the amount of waste, and reusing packaging.
• Lowering freight costs because of the light weight of plastics. • Plastics can be shaped and made in different patterns hence advantageous for marketing and shipping. • Plastics are made from natural resources such as
The recycling process of plastic begins at the recycling department wherever it may be located. The plastics are categorized according to plastic type. Plastic is then separated by color, the plastic is sterilized then crushed and chopped into plastic flakes. The plastic flakes are then melted and stirred. As a result of the stirring and melting a thick liquid is produced. This thick liquid is processed and spun into fiber strands that could be used for making fleec...
In the early morning hours of January 12th 1981, twenty-five detonations were heard coming from the ramp at Muñiz Air National Guard Base, located in the Luis Muñoz Marín International Airport in San Juan, Puerto Rico (PR). It was a terrorist attack. The result? Ten A-7D aircrafts and a single F-104 destroyed, with a total of $45,000,000 in damages. It was the largest attack on the US military since the Vietnam War. The culprits? All members of a separatist domestic terrorist group called Ejercito Popular Boricua (English: Boricua Popular Army or BPA, EPB) more commonly known as Los Macheteros (“The Machete Wielders”); a nickname that conjures images of the improvised group of Puerto Ricans that banded together to defend and fight the United States Army when they invaded during the Spanish-American War. BPA’s main ideology is a free Puerto Rico, free from the colonial status that United States has on PR, and for PR to become its own sovereign state. Although BPA is not as active as it once was, they still promote and will fight for PR’s independence. But to understand the history and origins, ideologies, and goals of BPA we must go back in time to recognize why such a group even exists.
The words ‘Reduce, Reuse, and Recycle’ are what a person chants if someone mentions the word recycling. Nicks J defines recycling as ‘[T]he processing of waste materials in order to make them reusable” (11). Individuals who recycle are not just throwing papers in green bins, or cans in blue; in fact, they are helping the environment more than they can imagine. People who want to preserve and protect their planet take the initiative to recycle waste materials. Rather than throwing away old plastic or glass bottles, aluminum cans, and certain types of paper, one can simply recycle them, and they will go through a cleaning and the remanufacturing process to be remade into a new usable item.
National Center for Manufacturing Sciences. (2004, August 11). Environmental Roadmapping Initiative. Retrieved October 14, 2011, from Plastics Impacts, Risks and Regulations: http://ecm.ncms.org/ERI/new/IRRPlastics.htm
Polyethylene (PE) is one of the most commonly used polymers which can be identified into two plastic identification codes: 2 for high-density polyethylene (HDPE) and 4 for low density polyethylene (LDPE). Polyethylene is sometimes called polyethene or polythene and is produced by an addition polymerisation reaction. The chemical formula for polyethylene is –(CH2-CH2)n– for both HDPE and LDPE. The formation of the polyethylene chain is created with the monomer ethylene (CH2=CH2).
Reduce, recycle and recycle could be a construct that individuals area unit beginning to perceive and to use to each life round the world (GOV.UK, 2013). This knowledge base essay can explore info concerning use by totally different resources that are provided to use such as the web, books, journals and alternative resources that needs to offer American state info on use. This essay can discover use as business, environmental and policy perspective. Use is that the methodology by that we tend to recover valuable resources to be re-used once more and once more. However just one a part of healing the atmosphere, it's a sensible action that people altogether businesses participate in daily routines on recycling (Reclaim, 2013). While recycling is only one part to healing the environment it is a practical action that individuals in all businesses and people take part in every day.
Today’s unprecedented technological advancement has accelerated the pace at which everyone is living. Time becomes a limited resource that every person tries to make the most use of. Therefore, convenience is the major quality highly valued in today’s world. Plastics strongly demonstrate such quality; plastics are light-weighted and disposable. Consequently, the use of plastics is prevalent, from simple objects, such as bags and bottles, to more complex components, such as computer boards. The benefits of plastics are countless; for instance, plastics are disposable and waterproof. However, many critics have raised questions regarding the threats posed by phenomenal plastics. What are the downsides of plastics? How should we cope with the plastic pollution around the globe? Susan Beraza has the answers to
Many people believe that we should not recycle anymore, but this is not the case. We, the people of the world, need to continue to recycle because we do not want our children to grow up in a world where there are no certain species of animals due to recycling failures. We also do not want our children to grow up thinking that it is okay that they throw their garbage on the ground, and not have to pick it up. We need to teach our children that they need to take care of the earth that they are living on, because they only get one. Recycling is one of the most beneficial environmental issues that we have here on this earth. Recycling saves energy, limits pollution and supports several environmental factors of the economy. “In 2003, the savings from recycling 54 billion aluminum cans exceeded the energy equivalent of 15 million barrels of crude oil- or the amount of gas the U.S. uses in one day,” according to the U.S. Environmental Protection Agency. The EPA estimates that 200 million gallons of used oil are not disposed of properly, and if we were to dispose the oil properly then we could keep the oil from polluting the ground and the fresh water source. According to E. Takatori, “… While on-going societal regulation treats material recycling as the dominant cycle, the properties of recycled plastic remain the most port
Recycling is one of the easiest ways to save energy for all the living things on Earth. Recycling save energy because using recyclable items that are not recycled can take a lot of energy. Recycling often saves energy because the products being recycled usually require much less processing to turn them into usable materials. Sometimes recycling can also save energy for goods which is
Millions of plastic bags are given out to consumers by supermarkets and stores to carry their goods in. They are also cheap, light, durable, easy to carry and in many cases, free. The most commonly used shopping bag is made of High Density Polyethylene (HDPE). This type is used in the majority of supermarkets and stores. After these bags are used, they often end up in landfills or as litter, roughly only three percent of plastic bags is actually recycled per year (Planet Ark, 2011). The materials used in making plastic bags make them non-biodegradable. According to the science dictionary, 2011 refers to “these materials cannot be decomposed into environmentally safe waste materials by the action of soil bacteria.” These harmful substances are toxic and take approximately four hundred years to break down, or in this case photo-degrade; which is how plastics made from (HDPE) break down. Since they are not biodegradable, they remain in the environment and are absorbed in soil or water (Indian Centre for Plastics in the Environment, 2010). This essay will discuss the various harmful effects of plastic bags, and demonstrate the risks that these bags impose on humans, animals and the environment. It will also discuss a series of suggested solutions that could help reduce plastic bag usage.
Jessica Knoblauch, an author for the Environmental Health News, writes about the toll plastic has on the environment, "the process of creating plastic can produce biological effects in a range of wildlife species, crippling the local ecosystem." All forms of plastic are created using oil. Oils are refined, mixed with poisonous chemicals, and cooked at high temperatures in order to produce items. This process produces toxic byproducts and greenhouse gases, reducing our air quality and can disrupt the
are required and less energy is needed to make recycled plastic products than to make
These fragments absorb all the toxins that pollute waterways, contaminate soil, and sicken animals (which are then consumed). Plastic trash also absorbs organic pollutants such as BPA. They take centuries to decompose while sitting in landfills, amounting to billions of environmentally poisonous time bombs. Bisphenol A (BPA) is a chemical compound used to create polycarbonate plastic and epoxy resins. Polycarbonate plastics are found in a wide range of products, but food and drink containers are the most concerning.
Plastic, like most inventions, was accidentally invented. Charles Goodyear was a perfect example of how things accidently started. He started the process of making plastic by dropping India-rubber mixed with sulfur on a hot stove. The in the late 1930s, chemist Wallace Carruthers invented nylon, which is a synthetic polymer. Polymers have a high melting and boiling point. Synthetic polymers are also known by the word we use today, plastic. The evolution of plastic started during World War II. Ever since then, plastic has been remolded and created to be used for our convenience in our everyday lives. For example, using a plastic cup or plate is more convenient than using a glass cup or bowl. People encounter many different types of plastic each day and may not be aware of it. In fact, during the first two hours of a typical morning, a female college student might encounter the following products which contain plastics: her alarm clock, mirror frame, the tape used to hang her posters, the toilet seat, the shower curtains, her deodorant, her toothbrush, her shampoo and conditioner bottles, her blow dryer, the light switch, bottled water, her refrigerator, a bread bag, her roommate's glasses, her fan, and phone.