Institute of Environment, Florida International University, 11200 SW 8th Street, Modesto A. Maidique Campus, Miami, FL 33199, USA; Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151st street, Biscayne Bay Campus, North Miami, FL 33181, USA.
Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151st street, Biscayne Bay Campus, North Miami, FL 33181, USA.
Mar Pollut Bull. 2022 Jul;180:113802. doi: 10.1016/j.marpolbul.2022.113802. Epub 2022 Jun 2.
In this research, we have developed and validated a modified version of the U.S.EPA method 506 using a liquid-liquid extraction method followed by gas-chromatography mass spectrometry analysis to assess the occurrence and spatial and seasonal variation of six phthalates (di(2-ethylhexyl) phthalate-DEHP, dibutyl phthalate-DBP, butyl benzyl phthalate-BBP, diethyl phthalate-DEP, dimethyl phthalate-DMP, and di-n-octyl phthalate-DOP) in surface and tap waters from South Florida, collected during the wet and dry seasons. The most frequently detected phthalate was DEHP, with concentrations up to 1.56 μg/L in surface water. Higher DEHP concentrations were observed in tap water during the wet season, which aligns with the higher temperature during the summer months facilitating leaching from plastic materials. Preliminary ecological and human health risk assessments suggested low hazard risk based on concentrations observed in tap and surface waters, respectively. PAEs could however still constitute a great concern to sensitive marine species, including early stages organisms and coral reefs.
在这项研究中，我们开发并验证了美国环保署方法 506 的一个改良版本，该方法采用液液萃取法，随后进行气相色谱-质谱分析，以评估六种邻苯二甲酸酯（邻苯二甲酸二（2-乙基己基）酯-DEHP、邻苯二甲酸二丁酯-DBP、邻苯二甲酸丁基苄基酯-BBP、邻苯二甲酸二乙酯-DEP、邻苯二甲酸二甲酯-DMP 和邻苯二甲酸二正辛酯-DOP）在佛罗里达州南部地表水和自来水中的存在情况以及空间和季节性变化，这些水样是在雨季和旱季采集的。最常检测到的邻苯二甲酸酯是 DEHP，其在地表水中的浓度高达 1.56μg/L。在雨季，自来水中的 DEHP 浓度更高，这与夏季高温期间从塑料材料中浸出的情况相符。根据自来水中和地表水中观察到的浓度，初步的生态和人类健康风险评估表明风险较低。然而，邻苯二甲酸酯仍然可能对包括早期生物阶段和珊瑚礁在内的敏感海洋物种构成重大威胁。
