scholarly journals The Problem of Plastic Waste and Microplastics in the Seas and Oceans: Impact on Marine Organisms

2019 ◽  
Vol 77 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Antonia Kurtela ◽  
Nenad Antolović

Abstract A global problem of today is the large amount of waste in the seas and oceans, primarily plastic waste. It is estimated that every year 1.25 to 2.41 million tons of plastic material is being carried by rivers into the seas and oceans. Waste is a major problem for marine organisms, causing entanglement, choking, strangulation, malnutrition and death. In 1972 the problems caused by microplastics, particles smaller than 5 mm, were first observed. Such particles bind pathogenic microorganisms on to their surface. Increasing quantities of microplastics have been found in the stomachs of fish, and also in shellfish that feed by filtering sea water. Ingested by marine organisms, such plastics may eventually pass through the food web and can end up ingested by humans. In addition, plastic releases chemical compounds whose effect on marine organisms and humans has still not been studied. Many international and state organizations offer solutions through recycling plastic waste, as well as reducing the production of plastic materials and informing the public about the problem.

2021 ◽  
Vol 888 ◽  
pp. 129-138
Author(s):  
Munzir Hadengganan ◽  
Djoko Sihono Gabriel

Plastic waste has become a big issue in the world for its large amount of plastic waste in the sea. Most of the plastic waste is plastic packaging which consists of flexible and rigid plastic packaging. This research discusses flexible plastic packaging. Until now, most researches on the loss of plastic materials discuss how to manage plastic waste disposal once it has been used by community: only a few discuss production cycle: while none of them discusses flexible plastic packaging area. This research aims to examine the number of mismanaged materials throughout flexible plastic packaging life cycle using a combination of Material Flow Analysis (MFA) and Life Cycle Analysis (LCA). Based on the literature review, interviews and observations conducted by the author to all stakeholders in the life cycle of flexible plastic packaging, mismanagement of plastic material occurred in each cycle, mostly caused by quality degradation of flexible plastic that could cause plastic waste was not acceptable in the mechanical recycle. The results of this study show that: (1) mismanaged material occurred in all cycles throughout the life cycles of flexible plastic packaging, (2) quality degradation is the main caused of mismanaged material in several cycles, and (3) the mismanaged materials in the life cycle of flexible plastic packaging were 98.29%.


2021 ◽  
Vol 2021 (2) ◽  
pp. 4376-4382
Author(s):  
IVETA CABALOVA ◽  
◽  
JARMILA GEFFERTOVA ◽  
TATIANA BUBENIKOVA ◽  
JOZEF KRILEK ◽  
...  

Prospective use of plastic material components resulting from their pyrolytic recovery is presented in the paper. Selected plastic waste materials (PE, PP, PS) were evaluated using modern analytical method GS-MS after the low-temperature pyrolysis. The low-temperature pyrolysis shows that the sample of PS was well-suited to this application and this recovery is important in the case of all three samples as well. The presence of 26 substances with 1-Hexene (13.72%) was observed in the case of pyrolysis products, specifically PE. When investigating PP, 36 substances with the highest content of 2.4-Dimethyl-1-heptene (38.35%) were defined. 20 substances containing especially Styrene (79.97%) were determined as the major products of PS pyrolysis. Moreover, using the GC-MS analysis, it was found out that chemical compounds present in all samples could be further recovered. The possibility of using the pyrolysis to recover the plastic waste materials in order to protect the environment is necessary.


2019 ◽  
Vol 8 (2) ◽  
pp. 1314-1316

The outline of this research paper is the usage of waste plastic materials in concrete mixes. Due to modernization with rapidly growing industries, urbanization all over the world has produces large amount of plastic waste. This produces enormous measure of plastic waste because of convey sacks which are utilized for pressing, conveying vegetables and pet jugs which are utilized for drinking reason, those makes a noteworthy ecological issues in light of the fact that, the plastic material will take billions of years to decay totally. The huge amount of plastic transfer waste may cause land contamination and water body gets defiled. The plastic waste is non degradable which is used in concrete to study the behavior of concrete with various percentages (0.0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%) of synthetic polymers (carry bags) and thermoplastic polymer resign (pet bottles). The concrete strengths are Compressive strength & Split tensile strengths of various concrete specimens were tested


2021 ◽  
Vol 004 (01) ◽  
pp. 022-029
Author(s):  
Dwi Ariyani ◽  
Niken Warastuti ◽  
Resti Arini

According to a survey by Nova Chemicals, Indonesia is the second largest contributor to sea waste after China, which is 1.29 million metric tons / year. At present there are still many people in Indonesia who throw garbage in any place, and can caused flooding in the river. The river is polluted with a lot of waste, one of which is the Citarum River. Citarum River is a river that is very important for residents of West Java. The condition of the Citarum River which is very alarming is polluted by waste and garbage. In the world's leading survey site, the Citarum River occupies the 4th position for the dirtiest river problem. The rubbish that pollutes the Citarum River is more inorganic or unbiodegradable, for example plastic, bottles or beverage cups, plastic food wrapping, and so on. As we know plastic waste is very difficult to decompose, it takes more than 100 years to decompose the plastic decomposed or decompose completely. Plastic waste is one source of environmental pollution in Indonesia. The benefits of using plastic products must be balanced with the calculation of the negative impact produced. The nature of this plastic material makes it difficult to replace it with other materials for various applications, especially in everyday life ranging from food packaging, household appliances, children's toys, electronics to automotive components. Increased use of plastic materials has resulted in increased production of plastic waste from year to year. The destruction of plastic waste by burning will only worsen the health because of the anti-dioxy substance produced. The most appropriate method used in dealing with waste is to use the Ecobrick method. The team of Pancasila University wanted to socialize how to make an ecobrick, and how strong the compressive on the ecobrick material was made. To overcome waste, especially plastic along the Citarum river. This socialization was held in Tanjung Mekar Village, Karawang Barat sub-district, Karawang Regency. The participants coming from the community of environmentalists (Eco Village). Community of eviromentalists hope will provide direction and socialization to their about the ecobrick method to deal with plastic waste that cannot be recycled. From the results of testing carried out at the Pancasila University concrete laboratory using ecobrick materials is plastic bottles filled with pure plastic, filled with sand, and a mixture of plastic and sand compared to red brick and concrete brick sold in the market, from the compressive strength test results it is known that the material ecobrick which contains of sand shows the greatest compressive strength value is 41.2 Mpa, compared to red brick which is 27 Mpa and concrete brick is 38 Mpa ecobrick has a higher compressive strength than other materials


2021 ◽  
Vol 6 (8) ◽  
pp. 1371-1375
Author(s):  
Dyah Utari ◽  
Azizah Musliha Fitri ◽  
Fandita Tonyka Maharani

Cipayung Village is an area of the Final Disposal Site (FDS) of Depok City. With the FDS, it will automatically have an impact on the surrounding community, coupled with the daily pattern of people who are accustomed to using plastic materials such as shopping containers. This results in more plastic waste in Cipayung Village. This problem requires real action that can make people aware to reduce plastic waste. The plastic diet is a campaign to the community in RT RW Cipayung Village which aims to increase public awareness of the dangers of plastic waste. This activity was carried out by distributing leaflets, reusable shopping bags, and educating the public. The results obtained from this activity are an increase in public knowledge about the dangers of plastic waste and a change in the habit of using plastic bags into shopping bags that can be used repeatedly. This behavior change significantly reduces the use of plastic bags in Cipayung Village. It is hoped that this activity will not only be carried out in one RT but can be carried out in other locations.


Author(s):  
Mohd Baharudin Ridzuan ◽  
Zawawi Daud ◽  
Amir Detho ◽  
Halizah Awang ◽  
Mohd Arif Rosli ◽  
...  

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3175
Author(s):  
Ravindra Prajapati ◽  
Kirtika Kohli ◽  
Samir K. Maity ◽  
Brajendra K. Sharma

Plastic is referred to as a “material of every application”. From the packaging and automotive industries to the medical apparatus and computer electronics sectors, plastic materials are fulfilling demands efficiently. These plastics usually end up in landfills and incinerators, creating plastic waste pollution. According to the Environmental Protection Agency (EPA), in 2015, 9.1% of the plastic materials generated in the U.S. municipal solid waste stream was recycled, 15.5% was combusted for energy, and 75.4% was sent to landfills. If we can produce high-value chemicals from plastic wastes, a range of various product portfolios can be created. This will help to transform chemical industries, especially the petrochemical and plastic sectors. In turn, we can manage plastic waste pollution, reduce the consumption of virgin petroleum, and protect human health and the environment. This review provides a description of chemicals that can be produced from different plastic wastes and the research challenges involved in plastic waste to chemical production. This review also provides a brief overview of the state-of-the-art processes to help future system designers in the plastic waste to chemicals area.


2012 ◽  
Vol 19 (3) ◽  
pp. 347-358 ◽  
Author(s):  
Magdalena Vaverková ◽  
František Toman ◽  
Dana Adamcová ◽  
Jana Kotovicová

Study of the Biodegrability of Degradable/Biodegradable Plastic Material in a Controlled Composting EnvironmentThe objective of this study was to determine the degrability/biodegradability of disposable plastic bags available on the market that are labeled as degradable/biodegradable and those certified as compost. The investigated materials were obtained from chain stores in the Czech Republic and Poland. Seven kinds of bags (commercially available) were used in this study. One of them was a disposable bag made of HDPE and mixed with totally degradable plastic additive (TDPA additive). Another was a disposable made of polyethylene with the addition of pro-oxidant additive (d2w additive). One was labeled as 100% degradable within various periods of time, from three months up to three years, and four were certified as compostable. The test was carried out in a controlled composting environment. The biodisintegration degree of the obtained pieces was evaluated following a modified version of ČSN EN 14806 Norm "Packaging - Preliminary evaluation of the disintegration of the packaging materials under simulated composting conditions in a laboratory scale test" and a modified version of ČSN EN ISO 20200 "Plastics - Determination of the degree of disintegration of plastic materials under simulated composting conditions in laboratory-scale test" (ISO 20200:2004). The emphasis was put on determination whether the bags are degradable/biodegradable or not.


2013 ◽  
Vol 668 ◽  
pp. 616-620
Author(s):  
Shuai Huang ◽  
Huang Yuan

Computational simulations of indentations in elastic-plastic materials showed overestimate in determining elastic modulus using the Oliver & Pharr’s method. Deviations significantly increase with decreasing material hardening. Based on extensive finite element computations the correlation between elastic-plastic material property and indentation has been carried out. A modified method was introduced for estimating elastic modulus from dimensional analysis associated with indentation data. Experimental verifications confirm that the new method produces more accurate prediction of elastic modulus than the Oliver & Pharr’s method.


2017 ◽  
Vol 862 ◽  
pp. 174-181
Author(s):  
Intan Baroroh ◽  
Bagiyo Suwasono ◽  
Ali Munazid

ABSTRACT.Blue Economy concept began with the farming of Artemia salt. The industry of farmer’s salt was one of the pillars that supported the economy of coastal communities. At present, the perspectives of the public on an industrial salt production is less profitable and conducted by unskilled laborers. Nowadays, the farmer still used evaporation total method of sea water by solar power, where NaClwas ≤ 90% and residual brine. It is necessary to improve the salt production through combination between disk-mill and distillation evaporation technology to produce salt diversification product. The result of the combination process were refined salt with NaClthat was ≥ 90%, liquid salt with NaClthat was ± 60% and mineral water.


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