Shenzhen Environmental Protection Monitoring Station

Shenzhen, China

Shenzhen Environmental Protection Monitoring Station

Shenzhen, China
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Liu G.,Shenzhen University | Liu G.,CAS Guangzhou Institute of Geochemistry | Liu D.,Shenzhen Environmental Protection Monitoring Station | Zhou Z.,Shenzhen Environmental Protection Monitoring Station
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2015

We analyze the polychlorinated naphthalene (PCN) levels in fly ash and flue gas samples collected from hospital, industrial and municipal solid waste incinerator in Shenzhen. The ranges of PCNs in fly ash and stack gas are 0.18~3.30 ng/g (dry weight, dw; averaged 0.73 ng/g) and 0.33~1.70 ng/m3 (averaged 0.87 ng/m3, dw), respectively. The PCN levels in samples from medical waste incinerators (MWI) and industrial waste incinerators (IWI) are found to be higher than those in samples from municipal solid waste incinerators (MSWI). The homologue pattern of PCNs in fly ash and stack gas is dominated by TrCNs-PeCNs. Specific investigation on PCN congeners reveals that CN23, CN28/CN43, CN35, CN38/CN40, CN46, CN61, CN57, CN62 and CN59 are the most dominant compound in fly ash and flue gas samples. ©, 2015, Editorial Office of Journal of Shenzhen University. All right reserved.


Liu G.,CAS Guangzhou Institute of Geochemistry | Liu G.,Shenzhen University | Liu D.,Shenzhen Environmental Protection Monitoring Station | Li Z.,Shenzhen Environmental Protection Monitoring Station | And 3 more authors.
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2014

Ambient air samples were collected for the analysis of polychlorinated biphenyls by using high-volume samplers in thirteen locations in Shenzhen during January and June 2010, respectively. The results indicated that, PCBs and dioxin-like PCBs concentration were in the range of 3.5-104.5 pg/m3(average 29.3 pg/m3) and 0.2-2.6 pg/m3(average 1.0 pg/m3) during the winter sampling season, respectively. During the summer sampling season, they were in the range of 10.7-135.7 pg/m3(average 44.6 pg/m3) and 1.2-4.8 pg/m3(average 2.2 pg/m3), respectively. The PCBs were dominated by tri-and tetra-PCBs, which accounted for 73.6%-91.4% of the ∑ρ(PCBs). The sources of PCBs were mainly from the local emissions of historical-used PCBs products, and some were unintentionally-produced PCBs from solid waste incineration and other thermal processes. Results indicate that Chinese PCBs product, imported PCBs product and solid waste incinerator contribute to 50%, 10% and 14% of the total PCBs released, respectively.


Liu G.,Shenzhen University | Luo Q.,Shenzhen University | Ding M.,Shenzhen University | Feng J.,Shenzhen Environmental Protection Monitoring Station
Environmental Monitoring and Assessment | Year: 2015

In this study, soil samples around Mawan coal-fired power plant (CFPP) in Shenzhen, a high background radiation area in South China, were analyzed for natural radionuclides. The activity concentration of 226Ra, 232Th, and 40K in soils around Mawan CFPP ranged from approximately 72 to 358 Bq kg−1 (averaged 204 Bq kg−1), 118 to 432 Bq kg−1 (averaged 265 Bq kg−1), and 101 to 2168 Bq kg−1 (averaged 1269 Bq kg−1), respectively, being found to be significantly higher than the world range values. The levels of these radionuclides in soil largely decreased with increasing distance from the CFPP, indicating a technologically enhanced natural radiation near the CFPP. The Raeq values for the soil samples around Mawan CFPP ranged from 346 to 878 Bq kg−1, most of which exceeded the allowed maximum Raeq value of 370 Bq kg−1. The operating of CFPP has increased the total radioactive dose received for the nearby population. © 2015, Springer International Publishing Switzerland.

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