Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Sci Total Environ. 2021 May 1;767:144433. doi: 10.1016/j.scitotenv.2020.144433. Epub 2020 Dec 24.
We investigated the occurrence, compositions, and partitioning behaviors of organophosphorus flame retardants (OPFRs) in indoor dust, air, and ornamental plants in Dalian, China, to evaluate the possibility of using houseplants as indoor biosamplers of OPFRs. The mean concentrations of OPFRs in the indoor air, dust, and plant samples were 14.9 ng/m, 18,000 ng/g, and 345 ng/g, respectively. Tris(2-chloroisopropyl) phosphate (TCIPP) was the dominant congener in all kinds of samples. Significant correlation was found between the concentrations of tris(1,3-dichloroisopropyl) phosphate (TDCIPP) in indoor air and plants, suggesting that ornamental plant can be used as a sentinel for certain OPFRs in the indoor air. We developed a predictive model to assess the partitioning coefficients of OPFRs between indoor air and plant. The lipid content in leaf cuticle instead of leaf organic matter was used to improve the accuracy and reliability of this assessment. Using this model, we can estimate the OPFR concentrations in the indoor air based on their concentrations measured in the corresponding indoor plant. The estimated air concentrations were generally comparable with the measured concentrations, especially for those with octanol-air partition coefficient log K <11.6. Indoor plants can also provide a more holistic understanding of OPFR occurrence within a home due to the relatively long-term air-foliage partitioning. The results suggest that under certain conditions indoor ornamental plants have the potential to be used as the biosamplers of OPFRs in the indoor environment due to their convenience and low-cost.
我们调查了中国大连室内灰尘、空气和观赏植物中有机磷阻燃剂 (OPFRs) 的发生、组成和分配行为，以评估将室内植物用作 OPFRs 室内生物采样器的可能性。室内空气中、灰尘中和植物样品中 OPFRs 的平均浓度分别为 14.9ng/m、18000ng/g 和 345ng/g。三（2-氯异丙基）磷酸酯（TCIPP）是所有样品中主要的同系物。在室内空气中和植物中发现了三（1,3-二氯异丙基）磷酸酯（TDCIPP）浓度之间存在显著相关性，这表明观赏植物可用作室内空气中某些 OPFRs 的哨兵。我们开发了一种预测模型来评估 OPFRs 在室内空气和植物之间的分配系数。我们使用叶片角质层中的脂质含量而不是叶片有机物来提高这种评估的准确性和可靠性。使用该模型，我们可以根据相应室内植物中测量的浓度来估计室内空气中的 OPFR 浓度。估计的空气浓度通常与实测浓度相当，尤其是对于那些辛醇-空气分配系数 log K <11.6 的化合物。由于空气-叶片分配相对较长，室内植物还可以更全面地了解室内环境中 OPFR 的发生情况。结果表明，在某些条件下，由于其便利性和低成本，室内观赏植物有可能被用作室内环境中 OPFRs 的生物采样器。
