Environmental Science and Management, Portland State University, P.O. Box 751, Portland, OR 97207, USA.
Mar Pollut Bull. 2012 Jul;64(7):1417-24. doi: 10.1016/j.marpolbul.2012.04.015. Epub 2012 May 28.
Caffeine, a biologically active drug, is recognized as a contaminant of freshwater and marine systems. We quantified caffeine concentrations in Oregon's coastal ocean to determine whether levels correlated with proximity to caffeine pollution sources. Caffeine was analyzed at 14 coastal locations, stratified between populated areas with sources of caffeine pollution and sparsely populated areas with no major caffeine pollution sources. Caffeine concentrations were measured in major water bodies discharging near sampling locations. Caffeine in seawater ranged from below the reporting limit (8.5 ng/L) to 44.7 ng/L. Caffeine occurrence and concentrations in seawater did not correspond with pollution threats from population density and point and non-point sources, but did correspond with storm event occurrence. Caffeine concentrations in rivers and estuaries draining to the coast ranged from below the reporting limit to 152.2 ng/L. This study establishes the occurrence of caffeine in Oregon's coastal waters, yet relative importance of sources, seasonal variability, and processes affecting caffeine transport into the coastal ocean require further research.
咖啡因是一种具有生物活性的药物，已被确认为淡水和海洋系统的污染物。我们对俄勒冈州沿海水域中的咖啡因浓度进行了量化，以确定其水平是否与咖啡因污染源的接近程度有关。在 14 个沿海地点进行了咖啡因分析，这些地点分为人口密集地区（有咖啡因污染源）和人口稀少地区（没有主要咖啡因污染源）。在靠近采样地点的主要水体中测量了咖啡因浓度。海水中的咖啡因含量范围从低于报告限值（8.5ng/L）到 44.7ng/L。海水中咖啡因的存在和浓度与人口密度和点源及非点源污染威胁没有对应关系，但与风暴事件的发生有关。流入海岸的河流和河口的咖啡因浓度范围从低于报告限值到 152.2ng/L。本研究确立了咖啡因在俄勒冈州沿海水域中的存在，但来源的相对重要性、季节性变化以及影响咖啡因进入沿海海洋的运输过程仍需要进一步研究。
