Environmental Engineering

Plastics and Environmental Sustainability by Anthony L. Andrady

By Anthony L. Andrady

Survey’s the problems normally raised in discussions of sustainability and plastics

  • Discusses present concerns no longer lined intimately formerly akin to ocean muddle, migration of additions into nutrition items and the restoration of plastics
  • Covers post-consumer destiny of plastics on land and within the oceans, highlighting the environmental affects of disposal methods
  • Details toxicity of plastics, relatively because it applies to human health
  • Presents a transparent research of the most important plastic-related matters together with a number of citations of the examine base that helps and contradicts the popularly held notions

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Above: Effect of tumor volume in mice on the BPA levels in drinking water shows an inverted-U response. Numbers on the horizontal axis refer to µg BPA/l of drinking water available to the mice. These correspond to 0–500 pg of BPA/kg body weight. Below: Suppression of adiponectin release from human breast adipose explants by BPA and estradiol (E2). , 2008). 3 Baby bottles and can liners may leach polycarbonate into food. 4 Modulus versus plasticizer (dioctyl phthalate) concentration for PS films.

3 Plastic resin production in different regions of the world. 4 A generalized flow diagram of the plastics industry showing the three phases of activity. 5 Schematic diagram of an injection molding machine showing the reciprocating screw and different heating zones. 6 An injection molding machine and examples of molded products. 7 Upper: schematic diagram of a single-screw extruder. Lower: a sheet extrusion die for plastics. 8 A diagram of the bottle blow molding process. 1. Heated parison. 2. Mold closing.

In a recent global survey of consumer packaged goods companies by DuPont in 2011, a majority (40%) of the respondents identified attaining sustainability (not costs or profits) as the leading challenge facing their industry today. Environmental movements including the call for sustainability have hitherto evolved along strict conservationist pathways over the decades that saw economic development inextricably linked with polluting externalities and tragedy of the commons. This invariably pitted business enterprise against the health of global environment.

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