Gas/particle partitioning of PAHs based on equilibrium-state model and steady-state model
Gas/particle partitioning of PAHs based on equilibrium-state model and steady-state model
复制标题
基于平衡态模型和稳态模型的PAHs气体/颗粒分配
DOI：
10.1016/j.scitotenv.2019.136029
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发表时间：
2020
影响因子：
9.8
通讯作者：
Li Yi-Fan
中科院分区：
文献类型：
--
作者：
Ma Wan-Li;Zhu Fu-Jie;Hu Peng-Tuan;Qiao Li-Na;Li Yi-Fan
气/粒(G/P)分配行为是影响大气中多环芳烃环境归宿的重要因素。在logKP大型数据库的基础上，应用平衡态和稳态模型对多环芳烃的G/P分配进行了综合研究，包括Harner-Bidleman(H-B)模型、Daches-Eisenreich(D-E)模型和Li-Ma-Yang(L-M-Y)模型。不同立地条件下，logKP与logKOA之间的回归趋势是一致的，但斜率和截留量不同。北方城市与南方城市之间无明显差异。对于多环芳烃的同系物和芳香环，回归、斜率和截距的差异更为明显。对于4环和5环多环芳烃的回归，thed-E模型和h-B模型的预测吻合较好，80%的监测点在±1个对数单位的范围内。L-M-Y模型仅对具有特殊logKOA值的四环多环芳烃进行了较好的预测。对于不同的logKOA范围，logKP与logKOA之间的回归也有显著差异。与我们的测量结果相比，如果考虑与测量之间的logKP值相差1个数量级，则h-B模型、thed-E模型和Thel-M-Y模型仅当logKOA在7.65-13.7、6.88-13.5和7.65-11.7时才能使用。因此，多环芳烃的G/P分配还需要进一步的预测模型研究。这一研究结果为SVOCs的G/P划分研究领域提供了新的见解。
The gas/particle (G/P) partitioning (KP) behavior is an important factor for the environmental fate of PAHs in atmosphere. Based on large database of logKP,equilibrium-stateandsteady-statemodels were applied for the comprehensive study with the G/P partitioning of PAHs, including the Harner-Bidleman (H-B) model, the Dachs-Eisenreich (D-E) model, and the Li-Ma-Yang (L-M-Y) model. For different sites, the trend of regression between logKPand logKOAwas same, however, the slopes and intercepts were different. No obvious difference was observed between northern Chinese cities and southern Chinese cities. For congeners and aromatic rings of PAHs, the difference was much more obvious for the regressions, slopes and intercepts. The prediction of theD-Emodel and theH-Bmodel matched well for the regression of the 4-rings and 5-rings PAHs, with >80% of monitoring data points in the range of ±1 log unit. TheL-M-Ymodel only predicted well with the measurement for 4-rings PAHs with special values of logKOA. For different ranges of logKOA, the difference with the regression between logKPand logKOAwas also obvious. Compared with our measurement, if 1 order of magnitude difference with logKPvalues between prediction and measurement was considered, theH-Bmodel, theD-Emodel and theL-M-Ymodel can be only used when the logKOAin the ranges from 7.65 to 13.7, 6.88 to 13.5, and 7.65 to 11.7, respectively. Therefore, further studies with prediction models should be conducted for the G/P partitioning of PAHs. The results of this study provided new insights into the research field of the G/P partitioning of SVOCs.