The PAH16 concentrations while in the gaseous phase PCI-34051 hdac6 varied from 84.four to 982.6ng��m?three, and also the average concentration was 417.two �� 299.8ng��m?three. PAH16 in particulates varied from 84.4 to 982.6ng��m?3, that has a indicate worth of 150.9 �� 99.2ng��m?3. PAH16 within the Baiyangdian atmosphere (gas+particle) ranged from 104.2 to 1250. 2ng��m?3, with a mean value of 548.six �� 392.4ng��m?3. The dust PAH16 concentration in this research ranged from 2916.9 to 12387.2ng��g?1, and also the mean worth was 6930.2 �� 3206.5ng��g?one.Table 2PAHs contents from the gaseous phase, particulate phase, and dust fall at Lake Tiny Baiyangdian.From Table 2, we are able to see that the PAHs compositions were really diverse within the gas, particulate, and dust fall samples. The PIK-5PAHs in the gaseous phase were dominated by LMW-PAHs (93.
5%); MMW-PAHs and HMW-PAHs accounted for six.2% and 0.5% with the total PAHs, respectively. Even so, during the particulate samples, the proportion of LMW, MMW, and HMW PAHs had been extra balanced, accounting for 37.8%, 38.2%, and 33.7%, respectively. Inside the dust fall samples, the percentages of LMW, MMW, and HMW PAHs had been 50.2%, 38.2%, and 11.6%, respectively.3.1.two. Seasonal-Spatial Distributions of Atmospheric PAHs The seasonal-spatial distributions in the PAHs during the gas-phase, particle-phase, and dust fall are proven in Figures ?Figures2,two, ?,three,three, and ?and4,4, respectively. The PAHs inside the gaseous phase and particulate phase followed equivalent seasonal trends. The residual amounts of PAH16 during the seasonal gas-phase contents exhibited the following purchase from high to lower values:winter (757.94ng��m?three) > autumn (575.
33ng��m?three) > spring (225.11ng��m?three) > summer (110.48ng��m?3). The seasonal selleck catalogparticulate samples were ranked while in the identical purchase: winter (260.89ng��m?three) > autumn (177.38ng��m?three) > spring (145.79ng��m?3) > summer (19.55ng��m?3). During the dust fall, the seasonal common concentrations from high to minimal had been winter (9.83 ��g��g?one) > autumn (9.69��g��g?1) > summertime(5.07��g��g?1) > spring (four.58��g��g?one).Figure 2Seasonal-spatial variation in PAHs inside the gaseous phase at Lake Compact Baiyangdian.Figure 3Seasonal-spatial variation in PAHs from the particulate phase at Lake Modest Baiyangdian.Figure 4Seasonal-spatial variation in PAHs from the dust fall at Lake Compact Baiyangdian.The typical yearly gaseous PAH16 material at the lake internet site was 370.0 �� 294.7ng��m?3 and in the village internet site was 464.39 �� 341.
9ng��m?3; the particulate phase articles was 128.8 �� 80.0ng��m?3 with the lake internet site and 173.0 �� 123.5ng��m?three in the village web page. A one-way ANOVA was employed to assess the spatial differences. The outcomes showed no significant differences between the gaseous (P = 0.62) and particle phases (P = 0.19); nonetheless, a distinction at a substantial level of 0.01 was found among the lake and village internet sites for your dust samples. The dust fall PAHs concentration at the lake website was 4980.one �� 2038.