Graduate School of Public Health, San Diego State University, San Diego, CA 92182, USA.
Chemosphere. 2012 Jan;86(3):258-63. doi: 10.1016/j.chemosphere.2011.09.039. Epub 2011 Oct 19.
Plastic debris were collected from eight beaches around San Diego County, California. Debris collected include: pre-production pellets and post-consumer plastics including fragments, polystyrene (PS) foam, and rubber. A total of n = 2453 pieces were collected ranging from <5 mm to 50 mm in size. The plastic pieces were separated by type, location, and appearance and analyzed for polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT) and its breakdown products, and chlordanes. PAH concentrations ranged from 30 ng g(-1) to 1900 ng g(-1), PCBs from non-detect to 47 ng g(-1), chlordanes from 1.8 ng g(-1) to 60 ng g(-1), and DDTs from non-detect to 76 ng g(-1). Consistently higher PAH concentrations found in PS foam samples (300-1900 ng g(-1)) led us to examine unexposed PS foam packaging materials and PS virgin pellets. Unexposed PS foam contained higher concentrations of PAHs (240-1700 ng g(-1)) than PS virgin pellets (12-15 ng g(-1)), suggesting that PAHs may be produced during manufacturing. Temporal trends of debris were investigated at one site, Ocean Beach, where storm events and beach maintenance were found to be important variables influencing debris present at a given time.
从加利福尼亚州圣地亚哥县周围的 8 个海滩收集了塑料碎片。收集的碎片包括：生产前的小球和消费后的塑料，包括碎片、聚苯乙烯（PS）泡沫和橡胶。共收集了 n = 2453 个大小从<5 毫米到 50 毫米不等的碎片。这些塑料碎片按类型、位置和外观进行了分离，并对多环芳烃（PAHs）、多氯联苯（PCBs）、滴滴涕（DDT）及其分解产物和氯丹进行了分析。PAH 浓度范围为 30 ng g(-1) 至 1900 ng g(-1)，PCBs 浓度范围为不可检出至 47 ng g(-1)，氯丹浓度范围为 1.8 ng g(-1) 至 60 ng g(-1)，DDTs 浓度范围为不可检出至 76 ng g(-1)。PS 泡沫样本中发现的 PAH 浓度（300-1900 ng g(-1)）一直较高，这促使我们检查了未暴露的 PS 泡沫包装材料和 PS 原始小球。未暴露的 PS 泡沫中 PAHs 浓度（240-1700 ng g(-1)）高于 PS 原始小球（12-15 ng g(-1)），这表明 PAHs 可能是在制造过程中产生的。在一个名为 Ocean Beach 的地点调查了碎片的时间趋势，发现风暴事件和海滩维护是影响特定时间内存在的碎片的重要变量。
