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493K offical calls on rotomolding sector to boost technology
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Cleveland — Gareth McDowell thinks it’s time for rotational molding to step up — to multilayer molding, new materials, more demanding high-tech parts, and closed-loop process...
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Chase opens customer service center, warehouse
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Updated  — Resin distributor Chase Plastic Services Inc. has gained a lot of experience in cutting ribbons lately. The Clarkston, Mich.-based firm officially has opened a $6 million...
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Prism acquires Tech Molded Plastics
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In a union of two precision automotive molders, Chesterfield, Mich.-headquartered Prism Plastics Inc. has acquired Tech Molded Plastics Inc. of Meadville, Pa. Effective June 23, the deal nearly...
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06-27-2016
Spanish auto supplier Ficosa secures $500 million in new business for North America
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Spanish auto supplier Ficosa International SA is making big moves in North America, with contracts to make nearly 9 million mirror systems in the next five years, and new business coming to the U....
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06-27-2016
UK car sales 'could slump 25 percent after Brexit vote'
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An expert on the United Kingdom’s automotive sector has forecast a slump in UK new car sales following last week’s vote to leave the European Union. With previously divided politicians ...
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06-27-2016
Rotational molding veteran says ‘one size doesn’t fit all’
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Cleveland — Ken Bather, a 32-year-veteran of rotational molding, thinks the process is amazing. “Rotomolding is a very strange bird — I loved it ever since I first saw it,” ...
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06-27-2016
Roto Made Local to exhibit at IDSA 2016 conference in Detroit
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Cleveland — The Roto Made Local roadshow will continue at the Industrial Designers Society of America’s annual conference in Detroit, Aug. 17-20. Detroit will mark the third straight...
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06-27-2016
Worker killed at Detroit-area tool maker
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A worker was killed June 26 in an accident involving an injection molding machine at Delta Tooling Co. in Auburn Hills, Mich. Police responded to a call at around 11:15 p.m., Auburn Hills Police...
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06-27-2016
Pricing front quiet for everything but PP in May
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The North American commodity resin market gave peace a chance in May, with all prices flat except for polypropylene. Plastics News in May reported an additional 2-cent decrease on North American...
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06-24-2016
Matsui partners with SA Engineering Technology center
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Livonia, Mich. — Matsui America Inc. of Hanover Park, Ill., is partnering with the new SA Engineering Technology Collaboration Center in Livonia. The center’s main objective is to...
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06-24-2016
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Biologist studies how marine plastics absorb contaminants

By Roger Renstrom
Correspondent

Published: January 16, 2013 9:55 pm ET
Updated: January 28, 2013 10:20 am ET

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Topics Materials Sustainability Materials Suppliers
Companies & Associations

SAN DIEGO -- A marine biology doctoral candidate's study found that pellets of polyethylene and polypropylene absorbed more organic contaminants than PET or PVC during submersion in the waters of San Diego Bay.

Concern about marine plastic pollution was a driver for the study.

Chelsea Rochman and another student, Shawn Kaye, deployed mesh bags with pellets of high density and low density PE, PP, PET and PVC at five locations and retrieved the material at varying intervals over 12 months ended June 2010. Portions of the 250 samples were studied at one, three, six, nine and 12 months.

The researchers extracted chemicals from the commodity thermoplastics and used gas chromatography and mass spectrometry techniques with equipment from Agilent Technologies Inc. of Santa Clara, Calif., to measure, in particular, the presence of polychlorinated biphenyls and polycyclic aromatic hydrocarbons. HDPE, LDPE and PP pellets continued to absorb contaminants throughout the 12 months and in greater concentrations than PET and PVC.

Locations included five docks and piers around the bay for San Diego harbor excursions, the Shelter Island neighborhood, Scripps Institution of Oceanography's Nimitz marine facility, the Coronado Cays community and the City of Chula Vista. Despite location variability, Rochman found relative differences in PCB and PAH sorption among the five polymers were consistent over space and time.

The study also measured the presence of metals absorbed into the pellets. "We are working on writing about them," Rochman said.

The website of the American Chemical Society's Environmental Science & Technology journal posted the nine-page study results on Dec. 27.

The National Science Foundation's graduate research fellowship program in Washington provided funds for the study with additional support from the Society of Environmental Toxicology and Chemistry of Pensacola, Fla., San Diego State University's research foundation and the PADI Foundation of Beverly Hills, Calif.

Rochman estimated about $20,000 was expended excluding internship stipends and other salaries.

Rochman, whose family lives in Tucson, Ariz., is pursuing a joint doctoral degree in marine biology from the University of California, Davis and San Diego State University.


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Biologist studies how marine plastics absorb contaminants

By Roger Renstrom
Correspondent

Published: January 16, 2013 9:55 pm ET
Updated: January 28, 2013 10:20 am ET

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