Department of Environmental Planning and Environmental Planning Institute, Graduate School of Environmental Studies, Seoul National University, Seoul 151-742, South Korea.
Environ Sci Technol. 2010 Nov 1;44(21):8056-61. doi: 10.1021/es1017416.
The proximity of PAHs distribution to the equilibrium states among air, soil, water, and bottom sediment was assessed for future risk management and coherence test among environmental quality objectives (EQOs) in these media. Concurrently measured concentration data in the four media were used. In the study areas (Seoul, Shihwa/Banwol, and Taegu), nonequilibrium states prevailed among air, soil, and water except for some light PAHs between air and water. Elevated concentration in soil particularly caused significant deviation from equilibrium between soil and other media. Coherence criteria among these media should be determined based on steady state (not equilibrium) conditions. Sediment was in or near equilibrium with soil for all PAHs, indicating that sediment quality is closely related to soil quality and that the coherence between the EQOs of the two media is required in the study areas. As the concentration ratio of individual PAHs for a given medium pair was found to vary up to 4 orders of magnitude across the study areas, a factor of 10 as a threshold criterion for incoherence is apparently too strict to apply to the national scale of Korea.
评估了多环芳烃（PAHs）在空气、土壤、水和底泥之间的分布接近平衡状态的程度，以便为这些介质中的未来风险管理和环境质量目标（EQOs）的一致性测试提供参考。同时使用了在四个介质中测量的浓度数据。在所研究的地区（首尔、始华/万波和大邱），除了空气和水之间的一些轻多环芳烃外，空气、土壤和水之间均存在非平衡状态。土壤中浓度升高尤其导致土壤与其他介质之间显著偏离平衡状态。这些介质之间的一致性标准应基于稳态（非平衡）条件来确定。对于所有多环芳烃，沉积物与土壤处于或接近平衡状态，这表明沉积物质量与土壤质量密切相关，并且需要在研究区域中考虑两个介质的 EQOs 之间的一致性。由于在所研究的地区，给定介质对之间的个别多环芳烃浓度比差异高达 4 个数量级，因此 10 的因子作为不一致性的阈值标准显然过于严格，不适用于韩国的国家尺度。
