scholarly journals A Persistence Search for the Most Appropriate Process of PET Recycling: A Review

2021 ◽  
pp. 681-688
Author(s):  
Neelam Thakur ◽  
Kritika Rajput ◽  
Navneet Kaur ◽  
Pankaj Mehta
Keyword(s):  
21St Century ◽  
Large Scale ◽  
Plastic Waste ◽  
Plastic Pollution ◽  
Recycling Process ◽  
High Demand ◽  
Hydrolysis Process

One of the most serious threats to the environment in today’s world is plastic pollution. The reason for widespread of plastic is its poor disposal management, indiscriminate use of plastic and its related products. There was a tremendous increase in the production of plastic from the start of 21st century due to its high demand which tripled the waste in these two decades. This review papers aims at providing the understanding of various techniques used for PET plastic degrading process and currently used in large scale that is quite detrimental to the environment. Further, the recent discovery of the bacteria eating enzyme provided a shaft of light in waste green recycling process. Adding to this, there is an outline provided for bioengineering of the most preferred enzymes for hydrolysis process result is compared that which one is more efficient one. Comparing them and trying to exploring the potential of various mutated enzymes for hydrolyzing of plastic waste formulated by various researchers to identify the Nobel PET catalyst which can solve the massive environment crisis when used in large-scale.

scholarly journals Beverage bottle capacity, packaging efficiency, and the potential for plastic waste reduction

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
R. Becerril-Arreola ◽  
R. E. Bucklin
Keyword(s):  
Product Category ◽  
Plastic Waste ◽  
Waste Reduction ◽  
Plastic Pollution ◽  
Local Data ◽  
Pet Waste ◽  
Pet Bottles ◽  
Enormous Amount ◽  
Packaging Efficiency ◽  
The U.S

AbstractPlastic pollution is a pressing issue because authorities struggle to contain and process the enormous amount of waste produced. We study the potential for reducing plastic waste by examining the efficiency with which different polyethylene terephthalate (PET) bottles deliver beverages. We find that 80% of the variation in bottle weight is explained by bottle capacity, 16% by product category, and 1% by brand. Bottle weight is quadratic and convex function of capacity, which implies that medium capacity bottles are most efficient at delivering consumable product. Local data on PET bottle sales and municipal waste recovery validate the findings. A 20% shift in consumption from smaller to larger bottles could reduce the production of PET waste by over 10,000 t annually in the U.S. alone.

Recycling Experimental Research of Thermosetting Phenolic Plastic Waste Based on Mechanical Effects

2011 ◽  
Vol 130-134 ◽  
pp. 1708-1711 ◽  
Author(s):  
Zhong Wei Wu ◽  
Zhi Feng Liu ◽  
Jian Zhao
Keyword(s):  
Recovery Process ◽  
Process Research ◽  
Plastic Waste ◽  
Process Conditions ◽  
Test Device ◽  
Recycling Process ◽  
Analytical Technique ◽  
Testing Method ◽  
Regeneration Mechanism ◽  
Mechanochemical Model

Using adjustable speed crushing regeneration test device for the recovery experiment of thermosetting phenolic plastic waste, this paper analyses the principle of recovery process. Through particle size analytical technique, FTIR, XRD and SEM etc. various testing method is analyzed mechanochemical effects of crushing process. Research the speed, time, temperature process parameters of the influence of recycling process conditions. According to the experimental results, it established the mechanochemical model and analyzed the degradation and regeneration mechanism of thermosetting phenolic plastic waste.

scholarly journals How important risk analysis of plastic pollution in coastal area? Case study in Masohi, Central Maluku

2020 ◽  
Vol 200 ◽  
pp. 02014
Author(s):  
Bachtiar W Mutaqin ◽  
Muh Aris Marfai ◽  
Muhammad Helmi ◽  
Nurhadi Nurhadi ◽  
Muhammad Rizali Umarella ◽  
...  
Keyword(s):  
Public Awareness ◽  
Coastal Areas ◽  
Plastic Waste ◽  
Small Island ◽  
Marine Biota ◽  
Plastic Pollution ◽  
Short Period ◽  
Almost All ◽  
And Function ◽  
Interdisciplinary Study

Human pressure on the coastal and aquatic surrounding ecosystem in Indonesia, through plastic waste, is increasing, considering that 60 % of the approximately 250 million people live in the coastal areas. Plastic waste originating from human activities has become a massive problem in almost all the small island and coastal regions, especially in the eastern part of Indonesia. This condition is caused by poor waste management and a lack of public awareness in disposing of waste in its place, including in an area known as its marine biodiversities and marine tourism spots like Masohi in Central Maluku. Also, the composition of waste is dominated by plastic waste that cannot be decomposed in a short period, continue circulated on the ocean currents, and will be deposited in coastal areas. Furthermore, some plastic waste will break down into micro-plastics that pollute not only the environment but also marine biota, which are often consumed by humans. This situation profoundly affects the sustainability and function of aquaecosystem services in coastal areas. Therefore, a comprehensive policy and regulation, and interdisciplinary study for analysing vulnerable coastal ecosystem, and mitigating the potential risk of plastic pollution in Masohi, Central Maluku are essential to be conducted.

scholarly journals Pendidikan Lingkungan: Plastic Pollution Awareness di Desa Jatireja, Cikarang, Jawa Barat

2020 ◽  
Vol 1 (2) ◽  
pp. 88 ◽  
Author(s):  
Filson M Sidjabat ◽  
Yunita Ismail ◽  
Evi Rismauli
Keyword(s):  
Environmental Education ◽  
Behavioral Change ◽  
Waste Treatment ◽  
Waste Utilization ◽  
Plastic Waste ◽  
Plastic Pollution ◽  
West Java ◽  
Education Community ◽  
The Government ◽  
Social Empowerment

Waste problems in Indonesia has reached a critical point that is contaminating many aspects in community. Poor waste management in land have an impact in water pollutions, rivers, and toward the ocean. This rivers and oceans pollution are become the spotlights for the world and the government. As a part of education community in West Java, President University has an important role to educati and find solutions relate with this issues, one of them is to implement Thidharma in the form of social empowerment in Jatireja Village. This environmental education activities was sharing knowledge about plastic waste treatment and management that can be conducted in household scale, and to encourage behavioral change and awareness among communities. Creative product of eco-brick was also implemented tas a part of waste utilization to make valueable product. Environmental education are needed to improve community awareness on plastic waste in Indonesia, especially in West Java.

scholarly journals PARTISIPASI MASYARAKAT DALAM PELESTARIAN DANAU TONDANO DI KABUPATEN MINAHASA

2021 ◽  
Vol 2 (1) ◽  
pp. 104-109
Author(s):  
Herling A Watania ◽  
Ellen Eva Poli ◽  
Xaverius Erick Lobja
Keyword(s):  
Community Participation ◽  
Large Scale ◽  
Local Community ◽  
Descriptive Analysis ◽  
Environmental Conservation ◽  
Plastic Waste ◽  
Lake Ecosystem ◽  
Qualitative Descriptive ◽  
Village Government

The research objective was to determine and describe how the participation and role of the community around Lake Tondano to preserve Lake Tondano from the silting process. To get accurate data, there are several ways to collect data which are often called data collection techniques, including (1) Interview, (2) Observation, (3) Documentation study. This research uses qualitative methods with qualitative descriptive analysis, namely by collecting, managing, presenting, and describing the research results as they are. Based on the results of the research, it is known that the form of community participation in the rehabilitation of Lake Tondano includes: (a) Community participation in the South Tondano sub-district is actively planting replacement trees around the lake, making terraces in the hills around the lake, continuous socialization to the community around the lake, and The community no longer throws plastic waste into waterways, either sewers or rivers, so that the lake ecosystem is maintained. Another participation is that the local community is also obliged to provide information to the sub-district or village government if there are people who try to destroy the forest carelessly around the lake and people who deliberately dump plastic waste on a large scale into waterways in the form of ditches and rivers. Also, the local community has followed government regulations regarding the preservation of Lake Tondano; (b) Other types of participation contributed by the community in South Tondano sub-district, including; a) participation of ideas or ideas, b) participation of personnel, c) participation of assets, d) participation of skills and skills and e) social participation. Forms of community participation in the environmental conservation of Lake Tondano are in the form of; a) active participation, b) passive participation.

scholarly journals Analysis on the barrier properties of thin film PLA/PBAT reinforced with microcrystalline cellulose

2021 ◽  
Vol 2129 (1) ◽  
pp. 012059
Author(s):  
Sitti Fatimah Mhd Ramle ◽  
Aqilah Abdul Rahim ◽  
Nur Hafizzah Jusoh ◽  
Nurul Fazita Mohammad Rawi ◽  
Che Ku Abdullah Che Ku Alam
Keyword(s):  
Thin Film ◽  
Water Absorption ◽  
Microcrystalline Cellulose ◽  
Absorption Rate ◽  
Barrier Properties ◽  
Poly Lactic Acid ◽  
Plastic Pollution ◽  
Water Absorption Rate ◽  
Environmental Friendly ◽  
Hydrolysis Process

Abstract In recent times, awareness on plastic pollution had increase which brings innovation on new productions to be environmental friendly. Various polymers has been used to analyse the suitability to produce thin films. In this study, Poly lactic acid (PLA) and Polybutylene adipate terephthalate (PBAT) reinforced with microcrystalline cellulose (MCC) were investigated. MCC were produced from selected bamboo for obtaining cellulose, then followed by an acidic hydrolysis process for the processing of microcrystalline cellulose (MCC). In this study, the thin film are focusing on the barrier properties such as water absorption, solvent resistance and absorption test. From the results shows that, the lowest rate of water absorption rate is 1.9% by 1% B-MCC/PLA/PBAT, meanwhile, the highest rate of water absorption is 60.1% by 5% C-MCC/PLA/PBAT. The water absorption rate decrease gradually with the decreasing of amount of MCC in the samples. Lastly, the thin film samples can resist with oleic acid solvents as the condition of thin film samples is still remain but they were not resistance with xylene as the thin film samples were shrinked and degraded. This thin film have a potential to replace the non-biodegradable petrochemical polymer based on their properties such as food contact, availability and cost.

Identifying global hotspots of plastic waste accumulation along river networks

2021 ◽  
Author(s):  
Jesus Gomez-Velez ◽  
Stefan Krause
Keyword(s):  
Multiple Scales ◽  
Transport Model ◽  
Freshwater Ecosystems ◽  
River Network ◽  
Plastic Waste ◽  
Trapping Efficiency ◽  
River Networks ◽  
Clear Understanding ◽  
Relative Location ◽  
Plastic Pollution

<p>Global plastic pollution is affecting ecosystems and human health globally. Proposing solutions and coping strategies for this threat requires a clear understanding of the processes controlling the fate and transport of mismanaged plastics at multiple scales, going from watersheds to regions and even continents. River corridors are the primary conveyor and trap for mismanaged plastic produced within the landscape and eventually released to the ocean. New approaches that apply technological sensing innovations for monitoring plastic waste in aquatic environments can improve observations and plastic waste datasets globally. However, our understanding of when, where, and how to target monitoring is limited, reducing the benefit gained. There is therefore a critical demand for predictions of hotspots (as well as hot moments) of plastic accumulation along river networks globally, in order to optimize observational capacity.     </p><p>Here, we present a new global flow and transport model for plastic waste in riverine environments. Our model predicts that only a small fraction (roughly 2.5%) of the global mismanaged plastic that entered rivers since the 1950s has been delivered to the ocean by 2020, with an overwhelming majority sequestered in freshwater ecosystems. Furthermore, we predict the patterns of mismanaged plastic accumulation and its residence time depend on (i) the topology and geometry of the river network, (ii) the relative location of plastic sources, and (ii) the relative location and trapping efficiency of flow regulation structures, primarily large dams. Our results highlight the role of rivers as major sinks for plastic waste and the need for targeted remedial strategies that consider the structure of the river network and anthropogenic regulation when proposing intervention measures and sampling efforts.</p>

An Overview of Multilingual Learners' Literacy Needs for the 21st Century

2020 ◽  
pp. 1-21
Author(s):  
MaryAnn Christison ◽  
Denise E. Murray
Keyword(s):  
Critical Literacy ◽  
21St Century ◽  
Large Scale ◽  
Literacy Skills ◽  
Human Migration ◽  
Multimodal Literacy ◽  
Common Definition ◽  
Societal Changes ◽  
Definition Of ◽  
Theoretical Considerations

The most common definition of literacy is the ability to read and write. However, for teachers working with multilingual learners, the development of literacy skills is much more complex than this simple definition would suggest. Notions of literacy in the 21st century have evolved in response to a number of societal changes, such as globalization, large-scale human migration, and advances in digital technologies. This chapter considers how these societal changes have influenced conceptions and practices of literacy. It provides a brief overview of some important theoretical considerations that inform understandings of literacy development for multilingual learners, including critical literacy, multiliteracies, multimodal literacy, and translanguaging, and explores current conceptions of literacy to help second and foreign language (SFL) teachers better understand how to meet the literacy needs of multilingual learners in the 21st century, offering practical suggestions for teaching from a multiliteracies perspective.

scholarly journals Pyro-Oil and Wax Recovery from Reclaimed Plastic Waste in a Continuous Auger Pyrolysis Reactor

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2040 ◽  
Author(s):  
Sultan Majed Al-Salem ◽  
Yang Yang ◽  
Jiawei Wang ◽  
Gary Anthony Leeke
Keyword(s):  
Product Distribution ◽  
Plastic Waste ◽  
Densification Process ◽  
Plastic Pollution ◽  
Waste Plastic ◽  
Diesel Fuels ◽  
Plastic Recycling ◽  
Plastic Wastes ◽  
Liquid Products ◽  
Pyrolysis Reactor

The increasing global waste plastic pollution is urging people to take immediate actions on effective plastic recycling and processing. In this work, we report the results of processing reclaimed plastic wastes from unsanitary landfill site in Kuwait by using a bench scale continuous auger pyrolysis system. The plastic feedstock was characterised. After a simple thermal densification process, the material was fed to the pyrolysis system at 500 °C. The pyro-oil and wax products were collected and characterised. The process mass balance was developed on dry basis, and the yields of pyro-oil, light wax, heavy wax and gases were 5.5, 23.8, 69.4 and 1.3 wt%, respectively. The findings have indicated that the reclamation of plastic waste from landfill was feasible in terms of the product distribution and characteristics. Further liquid analysis confirmed that the liquid products contained fractions that are comparable to petrol and diesel fuels. The wax products are viable and have potential application as coating, covering and lubrication.

scholarly journals A nationwide assessment of plastic pollution in the Danish realm using citizen science

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Kristian Syberg ◽  
Annemette Palmqvist ◽  
Farhan R. Khan ◽  
Jakob Strand ◽  
Jes Vollertsen ◽  
...  
Keyword(s):  
Citizen Science ◽  
Large Scale ◽  
Public Awareness ◽  
Decision Makers ◽  
Plastic Pollution ◽  
Political Decision ◽  
Pollution Research ◽  
Beach Litter ◽  
Citizen Science Project ◽  
Scientific Survey

Abstract Plastic pollution is considered one of today’s major environmental problems. Current land-based monitoring programs typically rely on beach litter data and seldom include plastic pollution further inland. We initiated a citizen science project known as the Mass Experiment inviting schools throughout The Danish Realm (Denmark, Greenland and the Faeroe Islands) to collect litter samples of and document plastic pollution in 8 different nature types. In total approximately 57,000 students (6–19 years) collected 374,082 plastic items in 94 out of 98 Danish municipalities over three weeks during fall 2019. The Mass Experiment was the first scientific survey of plastic litter to cover an entire country. Here we show how citizen science, conducted by students, can be used to fill important knowledge gaps in plastic pollution research, increase public awareness, establish large scale clean-up activities and subsequently provide information to political decision-makers aiming for a more sustainable future.

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