Instituto Español de Oceanografía, Centro Oceanográfico de Murcia, Apdo. 22, C/ Varadero 1, 30740 San Pedro del Pinatar, Murcia, Spain.
Instituto Español de Oceanografía, Centro Oceanográfico de Murcia, Apdo. 22, C/ Varadero 1, 30740 San Pedro del Pinatar, Murcia, Spain.
Environ Pollut. 2018 May;236:442-453. doi: 10.1016/j.envpol.2018.01.114.
Plastic polymers act as passive samplers in air system and concentrate hydrophobic organic contaminants by sorption or specific interactions, which can be transported to other systems such as the marine environment. In this study plastic debris was sampled in the surrounding area of a Mediterranean lagoon in order to determine the concentration of persistent and emerging organic contaminants. More specifically, desorption of 91 regulated and emerging organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated biphenyls, organochlorinated pesticides, current-use pesticides, personal care products, other pesticides and plastic additives) was characterized for the first 24 h from different polymers to seawater and the remaining content of these contaminants was also extracted by ultrasonic extraction with methanol. All samples were analyzed by Stir Bar Sorptive Extraction coupled to GC/MS. A significant fraction of sorbed contaminants in polymers was desorbed in the first 24 h, particularly for triazines and organophosphorus pesticides due to their lower hydrophobicity than other considered analytes. The remaining contaminants contained in plastics can be also transferred to seawater, sediments or biota. Considering 24 h desorbed fraction plus the remaining methanol extracted fraction, the highest transfer levels corresponded to personal care products, plastic additives, current-use pesticides and PAHs. This is the first study to show the relevance of the transport of organic contaminants on plastic debris from littoral areas to the marine environment.
塑料聚合物在大气系统中充当被动采样器，通过吸附或特定相互作用浓缩疏水性有机污染物，这些污染物可以被运移到其他系统，如海洋环境。本研究在一个地中海泻湖的周边地区采集了塑料碎片，以确定持久性和新兴有机污染物的浓度。更具体地说，首次描述了从不同聚合物到海水中解吸 91 种受管制和新兴有机污染物（多环芳烃、多氯联苯、有机氯农药、当前使用的农药、个人护理产品、其他农药和塑料添加剂）的情况，并通过甲醇超声提取提取了这些污染物的剩余含量。所有样品均通过搅拌棒吸附萃取结合 GC/MS 进行分析。在最初的 24 小时内，聚合物中相当一部分被吸附的污染物被解吸，特别是三嗪类和有机磷农药，因为它们的疏水性比其他考虑的分析物低。塑料中残留的污染物也可以转移到海水、沉积物或生物群中。考虑到 24 小时解吸部分加上剩余的甲醇提取部分，最高的转移水平与个人护理产品、塑料添加剂、当前使用的农药和 PAHs 相对应。这是第一项表明从沿海地区到海洋环境的塑料碎片上有机污染物传输具有相关性的研究。
