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  2. Nurdle (bead) - Wikipedia

    en.wikipedia.org/wiki/Nurdle_(bead)

    Pre-production plastic pellets, commonly known as nurdles, are tiny plastic pellets (smaller than 5 mm or 0.20 in) that are universally used in the plastics industry for the manufacture of plastic products. [1] [2] These microplastics are made primarily from polyethylene, polypropylene, polystyrene, polyvinyl chloride, and other plastics or ...

  3. Plastic pellet pollution - Wikipedia

    en.wikipedia.org/wiki/Plastic_pellet_pollution

    Plastic "nurdle" pellets on a beach in southwest France, 2011. Plastic pellet pollution is a type of marine debris originating from the plastic particles that are universally used to manufacture large-scale plastics. In the context of plastic pollution, these pre-production plastic pellets are commonly known as 'nurdles'. [1]

  4. United States regulation of point source water pollution

    en.wikipedia.org/wiki/United_States_regulation...

    However, there were several pollution enforcement cases in the 1960s and 1970s where the law was cited for broader pollution control objectives, prior to passage of the 1972 Clean Water Act. [ 13 ] By the mid-20th century, water pollution laws in the United States began to include health- and use-based standards to protect environmental and ...

  5. Nonpoint source pollution - Wikipedia

    en.wikipedia.org/wiki/Nonpoint_source_pollution

    Nonpoint source (NPS) pollution refers to diffuse contamination (or pollution) of water or air that does not originate from a single discrete source. This type of pollution is often the cumulative effect of small amounts of contaminants gathered from a large area. It is in contrast to point source pollution which results from a single source.

  6. Hong Kong plastic disaster - Wikipedia

    en.wikipedia.org/wiki/Hong_Kong_Plastic_Disaster

    Sinopec, owner of the containers of plastic pellets, as well as CSCL began to work in tandem with the NGOs in the clean-up at the end of July. However, it remained unclear that who should be responsible for the pollution of plastic pellets. China Petroleum and Chemical Corp said nurdles are not toxic nor hazardous on their own. [1]

  7. Plastic extrusion - Wikipedia

    en.wikipedia.org/wiki/Plastic_extrusion

    The feeds may be pellets, powder and/or liquids, but the product is usually in pellet form, to be used in other plastic-forming processes such as extrusion and injection molding. As with traditional extrusion, there is a wide range in machine sizes depending on application and desired throughput.

  8. Pollution Prevention Act of 1990 - Wikipedia

    en.wikipedia.org/wiki/Pollution_Prevention_Act...

    The Pollution Prevention Act of 1990 (PPA) is a United States federal law that created a national policy to promote the prevention of pollution or reduction at pollution sources wherever possible. [1] The law also expanded the Toxics Release Inventory (TRI), a waste reporting program administered by the United States Environmental Protection ...

  9. Plastic pipework - Wikipedia

    en.wikipedia.org/wiki/Plastic_pipework

    Plastic Pipe lengths manufactured in Australia by extruding HDPE material.. Plastic pipe is a tubular section, or hollow cylinder, made of plastic.It is usually, but not necessarily, of circular cross-section, used mainly to convey substances which can flow—liquids and gases (fluids), slurries, powders and masses of small solids.

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