Pollution Characteristics and Evaluation of PCBs in Square Dust from Grand Railway Station

Qian Tiana,b, Zhanle Chena, Cheng Chenga,Ting Liaoa. Mingming Shia,Weijie Liua, Xinli Xinga, Jiaquan Zhangb, Shihua Qia a State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, University of Geosciences, Wuhan, 430074, China b School of Environmental Science and Engineering, key Laboratory of Mine Environmental Pollution Control and Remediation, Hubei Polytechnic University, 435003, China

Introduction 2 Composition characteristics

The PCBs in the dust samples of the three railway stations are mainly from atmospheric In March 2017, 30 samples of dust samples from three large railway stations deposition. The PCBs adhere to the particles and migrate to the study area for a long distance. The in Wuhan were collected, including 12 in Wuhan, 8 in presence of trichlorobiphenyl, tetrachlorobiphenyl and pentachlorobiphenyl indicates that the and 10 in Railway Station. The content of 32 PCBs in samples was leakage of domestic transformer oil or power capacitor impregnating agent, paint volatilization determined by gas chromatography and measurements of health risk were and so on resulting in the contents of PCBs raising in the dust of Wuhan Station Square. At the conducted by the United States Environmental Protection Agency (USEPA) same time, the composition characteristics of PCBs in the dust of Wuchang Station Square show exposure assessment model. that atmospheric deposition and leakage of transformer oil are the main sources. The composition characteristics of PCBs in the dust of Hankou Station Square we can see that in addition to atmospheric deposition, the area was polluted by PCBs products such as transformer oil and paint.

Materials and Methods

Collecting 30 samples

Air drying, sieving, weighing

Cable extraction 24h 3 Health risk assessment Evaporator concentration

Fig.1 The sample map Except for adults who have a light carcinogenic risk through skin contact at Wuhan Chromatography Railway Station and Wuchang Railway Station, there are no carcinogenic risks in other ways through other routes.

Reconcentrate The order of non-carcinogenic risk was the same as the order of carcinogenic risk, both of which were Wuchang>Wuhan>Hankou, and the Nitrogen blowing volume HI values were all less than 1, so there was no non-carcinogenic risk.

Aglient GC 7890 Conclusion Fig.2 Aglient GC 7890

(1) The content of PCBs near Wuhan Station and Wuchang Station is equivalent, while the PCBs in the dust of Hankou Station are slightly lower than those in other two Station. The level of PCBs Results and discussion in road dust is closely related to the economic level of Wuhan City and the industrial production and traffic conditions near the study area. (2) The content of hexachlorobiphenyl in PCBs is high, and the composition characteristics of 1 Data analysis PCBs are basically similar, which indicates that PCBs in square dust samples are likely to have similar sources. The detection of ∑PCBs in Wuhan Station and (3) Health risk results show that, except for adults, there is a light carcinogenic risk through skin Wuchang Station was higher than that in Hankou contact at and Wuchang Railway Station. There are no carcinogenic risks Station, but there was no significant difference in the in other ways through three ways, and none of the three major railway stations exist. Non- content of ∑PCBs in the dust samples of Wuhan Station carcinogenic risk. The order of carcinogenicity and non-carcinogenicity index is and Wuchang Station Square. The contents of the Wuchang>Wuhan>Hankou. average PCBs in the samples could be influenced by Frequent industrial activities and busy traffic conditions near Wuhan Station and Wuchang Station.There are References Acer Bus Station and Navigation Car Passenger Station around Wuchang Railway Station. The traffic flow of people in WuHan Railway Station is far more than that [1] Kim K S, Lee Y M, Kim S G, et al. Associations of organochlorine pesticides and of . The location of Wuhan polychlorinated biphenyls in visceral vs. subcutaneous adipose tissue with type 2 diabetes and Station is outside the Third Ring Road, surrounded by insulin resistance[J]. Chemosphere, 2014, 94:151-157. Qingshan Industrial Zone and Wuhan Iron and Steel [2] Zhu J Y, Wang D, Wang Y K, et al. Comprehensive analysis and ecological and health risk Group,etc. Fig. 3 Comparison of total PCBs assessment of persistent organic pollutants in Taihu Lake Basin[J]. Journal of University (Natural Sciences), 2016, 52 (02):370-381. [3] Yu B B, Xie X J, Lena Q, et al. Source, distribution, and health risk assessment of polycyclic aromatic hydrocarbons in urban street dust from Tianjin, China [J]. Environmental Science and Pollution Research, 2013, 21(4):2817-2825.