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Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Plasticity00:58

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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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Plastic Behavior01:21

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Primary Production01:06

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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
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Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
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Defining plastic pollution hotspots.

Paolo F Tasseron1, Tim H M van Emmerik2, Paul Vriend3

  • 1Hydrology and Environmental Hydraulics Group, Wageningen University and Research, 6708 PB, Wageningen, the Netherlands; Amsterdam Institute for Advanced Metropolitan Solutions, 1018 JA Amsterdam, the Netherlands.

The Science of the Total Environment
|May 19, 2024
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Summary

Identifying plastic pollution hotspots is crucial for effective environmental strategies. This study proposes a framework for a unified definition, ensuring consistent and targeted plastic waste reduction efforts.

Keywords:
Environmental governanceInternational policy treatiesMarine litterPlastic pollutionPlastic prevention and reductionWaste management

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Area of Science:

  • Environmental Science
  • Ecology
  • Environmental Policy

Background:

  • Plastic pollution is a significant global threat to ecosystems and human health.
  • Effective mitigation requires identifying and prioritizing plastic pollution hotspots.
  • Current methods for defining hotspots lack consistency and clear boundaries.

Purpose of the Study:

  • To analyze the variability of plastic hotspot definitions across different scales.
  • To propose a standardized, step-wise framework for defining plastic hotspots.
  • To facilitate more effective plastic pollution prevention and reduction strategies.

Main Methods:

  • Applied four common hotspot definitions to diverse plastic pollution datasets (urban to global).
  • Evaluated the impact of different definitions on the extent and location of identified hotspots.
  • Developed a framework based on purpose, units, spatial/temporal scales, and thresholds.

Main Results:

  • Hotspot definitions varied dramatically, covering 0.8%–93.3% of plastic pollution and <0.1%–50.3% of locations.
  • Significant temporal inconsistency was observed in hotspot identification.
  • The proposed framework offers a harmonized approach to defining plastic hotspots.

Conclusions:

  • A unified and fit-for-purpose approach is essential for defining plastic pollution hotspots.
  • The developed framework provides clear criteria for consistent hotspot delineation.
  • Standardized hotspot identification will improve resource allocation and mitigation effectiveness.