Ye Langjie, Su Guanyong
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
Water Res. 2022 Jun 15;217:118362. doi: 10.1016/j.watres.2022.118362. Epub 2022 Mar 25.
Aquatic environments in industrial, and e-waste recycling areas might undergo severe contamination; however, there are few studies comprehensively assessing the pollution status of organophosphate esters (OPEs) in these two areas. Here, we applied both atmospheric pressure chemical ionization (APCI) and electron spray ionization (ESI) sources in our target, suspect, and functional group-dependent screening strategy, which enhanced the confidence for confirmation on precursor ions of OPEs. Then, n=53 sediment samples (30 from the industrial area, and 23 from the e-waste recycling area) were analyzed. Twenty-three out of 30 target OPEs were quantifiable in these analyzed samples. Total OPE concentrations (ΣOPEs) in samples from e-waste recycling area range from 12.8 to 9250 ng/g dry weight (dw), that are statistically significantly greater (t-test, p < 0.001) than those from industrial area (25.1-5520 ng/g dw). ΣOPEs in the sediments from industrial, or e-waste recycling area are statistically significantly greater (one-way ANOVA, p < 0.001) as compared to those (32.0-369 ng/g dw) from Taihu Lake in our previous study. In sediment from three areas, suspect and non-target analysis fully or tentatively identified other 20 OPEs. Four of them have not been recorded or registered in any of online chemical databases, and they are tentatively named as ((methoxy(phenoxy)phosphoryl)oxy)phenyl diphenyl phosphate (mPPODP), (tert-butyl)phenyl (ethyne-oxidane) bis(2,4-di-tert-butylphenyl) phosphate (TPBDTP), bis(dichlorophenyl) propane-1,3-diyl bis(hexylated phosphate) (BDCBHP), and bis(2-hexadecoxyethyl) ethyl phosphate (BHEPP). Overall, this study provided new insights regarding both analytical methodology and pollution status of OPEs, and highlights that elevated concentrations and high diversity of OPEs exist in sediments from industrial, and e-waste recycling areas.
工业和电子垃圾回收区的水生环境可能会受到严重污染；然而，很少有研究全面评估这两个区域中有机磷酸酯（OPEs）的污染状况。在此，我们在目标物、可疑物和官能团依赖性筛选策略中应用了大气压化学电离（APCI）和电喷雾电离（ESI）源，这增强了对OPEs前体离子确认的可信度。然后，分析了n = 53个沉积物样本（30个来自工业区，23个来自电子垃圾回收区）。在这些分析样本中，30种目标OPEs中有23种是可定量的。电子垃圾回收区样本中的总OPE浓度（ΣOPEs）范围为12.8至9250 ng/g干重（dw），在统计学上显著高于工业区样本（25.1 - 5520 ng/g dw）（t检验，p < 0.001）。与我们之前研究中太湖沉积物（32.0 - 369 ng/g dw）相比，工业区或电子垃圾回收区沉积物中的ΣOPEs在统计学上显著更高（单因素方差分析，p < 0.001）。在三个区域的沉积物中，可疑物和非目标物分析完全或初步鉴定出另外20种OPEs。其中四种在任何在线化学数据库中均未被记录或登记，它们被暂命名为（（甲氧基（苯氧基）磷酰基）氧基）苯基二苯基磷酸酯（mPPODP）、（叔丁基）苯基（环氧乙烷）双（2,4 - 二叔丁基苯基）磷酸酯（TPBDTP）、双（二氯苯基）丙烷 - 1,3 - 二基双（己基化磷酸酯）（BDCBHP）和双（2 - 十六烷氧基乙基）乙基磷酸酯（BHEPP）。总体而言，本研究为OPEs的分析方法和污染状况提供了新的见解，并强调在工业区和电子垃圾回收区的沉积物中存在OPEs的高浓度和高多样性。
