Assessing potential risks of aquatic polycyclic aromatic compounds via multiple approaches: A case study in Jialing and Yangtze Rivers in downtown Chongqing, China.
Assessing potential risks of aquatic polycyclic aromatic compounds via multiple approaches: A case study in Jialing and Yangtze Rivers in downtown Chongqing, China.
复制标题
DOI：
10.1016/j.envpol.2021.118620
复制
发表时间：
2021-12
影响因子：
8.9
通讯作者：
Yunxi Zhu;Bo Liang;Weiwei Xia;Min Gao;Haojun Zheng;Jing Chen;Yang Chen;Mi Tian
中科院分区：
文献类型：
--
作者：
Yunxi Zhu;Bo Liang;Weiwei Xia;Min Gao;Haojun Zheng;Jing Chen;Yang Chen;Mi Tian
为了更好地评价水生多环芳烃（PACs）的潜在风险，采用多种方法对重庆市嘉陵江和长江地表水中的母体多环芳烃、硝化多环芳烃和氧化多环芳烃（NPAH和OPAH）进行了人体健康和生态风险评价。两条河流中∑PAHs的浓度（334 ± 125 ng L−1）远高于∑OPAHs的浓度（20.2 ± 7.49 ng L−1），而NPAHs几乎未检出。丰水期检测到的PAC浓度高于枯水期，可能是由于丰水期强降雨导致颗粒物输入量增加所致。多环芳烃的浓度在颗粒相高于溶解相，而OPAHs的水平表现出相反的模式。PACs在水-悬浮颗粒物（SPM）体系中的分配系数（Kp）主要受SPM浓度和PACs的辛醇/水分配系数的影响。非概率风险评估模型和基于蒙特卡罗模拟的概率风险评估模型计算的人类健康风险显示出相似的数据模式，但绝对值略有差异。这两种模型都揭示了潜在的甚至严重的人类健康风险，主要是由皮肤接触水生PAC在这项研究中。此外，这些模型还表明，婴儿期对PAC暴露高度敏感。敏感性分析表明，健康风险结果对苯并[a]芘等效毒性浓度（BaPeq）最为敏感，其次是淋浴时间和每日饮水量。基于不同质量值的模型得出的各个PAC的生态风险和贡献水平不同。毒性数据的充分性对生态风险评估的可靠性至关重要。
To better evaluate the potential risks of aquatic polycyclic aromatic compounds (PACs), multiple approaches have been implemented in this study to assess the human health and ecological risks of parent, nitrated and oxygenated polycyclic aromatic hydrocarbons (PAHs, NPAHs and OPAHs) in the surface water of Jialing and Yangtze Rivers in downtown Chongqing in southwestern China. The concentrations of ∑PAHs (334 ± 125 ng L−1) were much higher than those of ∑OPAHs (20.2 ± 7.49 ng L−1) in the two rivers, while NPAHs were barely detected. Concentrations of detected PACs were higher in wet season than dry season, probably resulted from the elevated particle input due to heavy rainfall in wet season. Concentrations of PAHs were higher in the particulate phase than dissolved phase, while OPAHs levels showed a reverse pattern. The partition coefficients (Kp) of PACs in the water-SPM (suspended particulate matter) system were mainly affected by SPM concentrations and octanol/water partition coefficients of specific PACs. Human health risks calculated from non-probabilistic risk assessment model and probabilistic risk assessment model based on Monte Carlo simulation showed similar data pattern with slight difference in absolute values. Both models revealed potential or even severe human health risks contributed mainly by dermal exposure to aquatic PACs in this study. Furthermore, these models also manifested that infant stage was highly sensitive for PAC exposure. Sensitivity analysis indicated that health risk results was most sensitive to Benzo[a]pyrene equivalent toxic concentration (BaPeq), followed by showering time and daily water intake volume. Levels of ecological risks and contributions of individual PACs differed from models based on different quality values. The adequacy of toxicity data was crucial for the reliability of ecological risk assessment.