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Dejun Wan
Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China

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Journal article
Published: 02 July 2019 in Science of The Total Environment
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As the largest coal-producing province in China, the coal production of Shanxi Province accounts for one third of the country's total. Thus it is of great importance to study the pollution history of coal combustion in Shanxi Province and understand the pollutants emissions and their links with energy usage in North China. Sediment cores from two relatively remote lakes in central North China were retrieved to investigate historical evolutions of black carbon (BC) and polycyclic aromatic hydrocarbons (PAHs) in the last ~200 years. The two records show several-fold increases in both concentrations and depositional fluxes of BC, char, soot, and PAHs, which increased mainly in recent five decades, were associated with the influence of anthropogenic activities resulting from socio-economic development in Shanxi Province. However, after ~2000 their fluxes decreased sharply due to China's effort on environmental protection. These changes indicate that atmospheric BC and PAHs load in the region were affected significantly by recent anthropogenic activities and environmental policies. Ratios of individual PAHs and char/soot indicate pyrogenic sources of these increased pollutants in recent decades, with coking industry and coal combustion as the two major sources. Significant positive correlations between BC and PAHs were observed in both cores of Lake Gonghai and Lake Mayinghai, indicating that they were likely co-transported by BC particles from similar sources. This study provides new and important understanding of the atmospheric pollution history of BC and PAHs in North China.

ACS Style

Changlin Zhan; Dejun Wan; Yongming Han; Jiaquan Zhang. Historical variation of black carbon and PAHs over the last ~200 years in central North China: Evidence from lake sediment records. Science of The Total Environment 2019, 690, 891 -899.

AMA Style

Changlin Zhan, Dejun Wan, Yongming Han, Jiaquan Zhang. Historical variation of black carbon and PAHs over the last ~200 years in central North China: Evidence from lake sediment records. Science of The Total Environment. 2019; 690 ():891-899.

Chicago/Turabian Style

Changlin Zhan; Dejun Wan; Yongming Han; Jiaquan Zhang. 2019. "Historical variation of black carbon and PAHs over the last ~200 years in central North China: Evidence from lake sediment records." Science of The Total Environment 690, no. : 891-899.

Journal article
Published: 20 November 2018 in Polish Journal of Environmental Studies
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Although environmental problems caused by metal mining have become increasingly prominent, the pollution by associated heavy metals is easily neglected. In general, molybdenum mines are lowgrade and hence the high level of associated heavy metals easily causes pollution in the surrounding areas. Here we investigated the total concentrations and forms of Mo and associated Cu, Cd, Pb, and Zn in soils under different land-use types (barren, wheat, rape, and apple-seedling fields) and different plants (cultivated crops and wild wormwood) around an abandoned molybdenum tailings site. The results showed that the average total concentrations of Cu and Zn in farmland bulk soils around the site exceeded the level II standard of the National Environmental Quality Standard for Soils in China, the average Cd and Pb concentrations exceeded the level III standard, and the average Mo concentration exceeds the soil background value in Shaanxi Province. The percentages of available heavy metals in wormwood and seedling rhizosphere soils were significantly higher than those in crop rhizosphere soils. Heavy metals mainly accumulated in the roots of plants tested in this study. The Cu, Cd, and Pb concentrations in wormwood exceeded the limits of these metals in general plants. The Cd and Pb pollution indices of corn at the side of the barren land were 3.12 and 2.48, respectively, and the Pb pollution index of rape was 3.42, according to the standard limit of pollutants in food for China. On the basis of the level III standard, the pollution assessment of soils revealed serious pollution of the barren land and wheat fields, and moderate pollution of the rape and seedling fields. This study indicates that the heavy metals associated with the molybdenum mine have polluted the surrounding soils and plants, of which pollution of the barren land is the most serious.

ACS Style

Zhangxiong Han; Dejun Wan; Haixia Tian; Wenxiang He; Ziquan Wang; Qiang Liu. Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China. Polish Journal of Environmental Studies 2018, 28, 123 -133.

AMA Style

Zhangxiong Han, Dejun Wan, Haixia Tian, Wenxiang He, Ziquan Wang, Qiang Liu. Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China. Polish Journal of Environmental Studies. 2018; 28 (1):123-133.

Chicago/Turabian Style

Zhangxiong Han; Dejun Wan; Haixia Tian; Wenxiang He; Ziquan Wang; Qiang Liu. 2018. "Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China." Polish Journal of Environmental Studies 28, no. 1: 123-133.

Journal article
Published: 26 January 2018 in Polish Journal of Environmental Studies
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To investigate ecological risks and spatial distributions of heavy metals in atmospheric particles in the Beijing urban area, atmospheric dust was collected from 62 sites and 12 heavy metals in thei(...)

ACS Style

Dejun Wan; Guanglin Yang; Jinsong Yang; Changlin Zhan. Ecological Risks and Spatial Distributions of Heavy Metals in Beijing Atmospheric Dust. Polish Journal of Environmental Studies 2018, 27, 881 -887.

AMA Style

Dejun Wan, Guanglin Yang, Jinsong Yang, Changlin Zhan. Ecological Risks and Spatial Distributions of Heavy Metals in Beijing Atmospheric Dust. Polish Journal of Environmental Studies. 2018; 27 (2):881-887.

Chicago/Turabian Style

Dejun Wan; Guanglin Yang; Jinsong Yang; Changlin Zhan. 2018. "Ecological Risks and Spatial Distributions of Heavy Metals in Beijing Atmospheric Dust." Polish Journal of Environmental Studies 27, no. 2: 881-887.

Journal article
Published: 10 November 2016 in International Journal of Environmental Research and Public Health
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Understanding variations of heavy metals in atmospheric particles between different functional areas is significant for pollution control and urban planning in cities. To reveal pollution and spatial distribution of heavy metals in atmospheric particles from different urban functional areas in Shijiazhuang in North China, 43 settled dust samples were collected over the main urban area and heavy metal concentrations were determined in their <63 μm fractions using an ICP-OES. The results suggest that Cr, Mn, Fe, Co, Ni, and V in the dust are not or slightly enriched and their concentrations vary slightly between different sites, implying their natural origins; whereas Cu, Zn, Cd, and Pb are often notably enriched and their concentrations vary significantly between different functional areas, indicating their anthropogenic sources. Integrated pollution indexes (IPIs) of the ten heavy metals are 2.7–13.6 (5.7 ± 2.2), suggesting high or very high pollution levels of most dust. Relatively lower IPIs occur mainly in the administration-education area, the commercial area, and other unclassified sites; while peaks occur mainly in the North Railway Station, the northeastern industrial area, and some sites near heavily trafficked areas, implying the significant influence of intensive industrial (including coal combustion) and traffic activities on atmospheric heavy metal accumulation. These results suggest a clear need of mitigating atmospheric heavy metal pollution via controlling emissions of toxic metals (especially Cd and Pb) from industrial and traffic sources in the city.

ACS Style

Dejun Wan; Zhangxiong Han; Jinsong Yang; Guanglin Yang; Xingqi Liu. Heavy Metal Pollution in Settled Dust Associated with Different Urban Functional Areas in a Heavily Air-Polluted City in North China. International Journal of Environmental Research and Public Health 2016, 13, 1119 .

AMA Style

Dejun Wan, Zhangxiong Han, Jinsong Yang, Guanglin Yang, Xingqi Liu. Heavy Metal Pollution in Settled Dust Associated with Different Urban Functional Areas in a Heavily Air-Polluted City in North China. International Journal of Environmental Research and Public Health. 2016; 13 (11):1119.

Chicago/Turabian Style

Dejun Wan; Zhangxiong Han; Jinsong Yang; Guanglin Yang; Xingqi Liu. 2016. "Heavy Metal Pollution in Settled Dust Associated with Different Urban Functional Areas in a Heavily Air-Polluted City in North China." International Journal of Environmental Research and Public Health 13, no. 11: 1119.

Journal article
Published: 11 May 2016 in International Journal of Environmental Research and Public Health
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To examine levels, health risks, sources, and spatial distributions of potentially toxic elements in settled dust over Beijing urban area, 62 samples were collected mostly from residential building outdoor surfaces, and their <63 μm fractions were measured for 12 potentially toxic elements. The results show that V, Cr, Mn, Co, Ni, and Ba in dust are from predominantly natural sources, whereas Cu, Zn, As, Cd, Sb, and Pb mostly originate from anthropogenic sources. Exposure to these elements in dust has significant non-cancer risks to children but insignificant to adults. Cancer risks of Cr, Co, Ni, As, and Cd via inhalation and dermal contact are below the threshold of 10−6–10−4 but As via dust ingestion shows a tolerable risk. The non-cancer risks to children are contributed mainly (75%) by As, Pb, and Sb, and dominantly (92%) via dust ingestion, with relatively higher risks mainly occurring in the eastern and northeastern Beijing urban areas. Although Cd, Zn, and Cu in dust are heavily affected by anthropogenic sources, their health risks are insignificant. Source appointments suggest that coal burning emissions, the dominant source of As, are likely the largest contributors to the health risk, and traffic-related and industrial emissions are also important because they contribute most of the Pb and Sb in dust.

ACS Style

Dejun Wan; Changlin Zhan; Guanglin Yang; Xingqi Liu; Jinsong Yang. Preliminary Assessment of Health Risks of Potentially Toxic Elements in Settled Dust over Beijing Urban Area. International Journal of Environmental Research and Public Health 2016, 13, 491 .

AMA Style

Dejun Wan, Changlin Zhan, Guanglin Yang, Xingqi Liu, Jinsong Yang. Preliminary Assessment of Health Risks of Potentially Toxic Elements in Settled Dust over Beijing Urban Area. International Journal of Environmental Research and Public Health. 2016; 13 (5):491.

Chicago/Turabian Style

Dejun Wan; Changlin Zhan; Guanglin Yang; Xingqi Liu; Jinsong Yang. 2016. "Preliminary Assessment of Health Risks of Potentially Toxic Elements in Settled Dust over Beijing Urban Area." International Journal of Environmental Research and Public Health 13, no. 5: 491.

Journal article
Published: 18 September 2015 in Human and Ecological Risk Assessment: An International Journal
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ACS Style

Dejun Wan; Zhangxiong Han; Dongwei Liu; Jinsong Yang. Risk assessments of heavy metals in house dust from a typical industrial area in Central China. Human and Ecological Risk Assessment: An International Journal 2015, 22, 489 -501.

AMA Style

Dejun Wan, Zhangxiong Han, Dongwei Liu, Jinsong Yang. Risk assessments of heavy metals in house dust from a typical industrial area in Central China. Human and Ecological Risk Assessment: An International Journal. 2015; 22 (2):489-501.

Chicago/Turabian Style

Dejun Wan; Zhangxiong Han; Dongwei Liu; Jinsong Yang. 2015. "Risk assessments of heavy metals in house dust from a typical industrial area in Central China." Human and Ecological Risk Assessment: An International Journal 22, no. 2: 489-501.