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Li Sun
Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin, China

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Original paper
Published: 01 June 2021 in Arabian Journal of Geosciences
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The contents of 16 kinds of polycyclic aromatic hydrocarbons (PAHs) listed on US EPA’s Priority chemical list in the sediment cores taken from the center of Bosten Lake in Western China were analyzed, and dated with 210Pb and 137Cs in order to reconstruct the history of PAHs sedimentation in Bosten Lake in the period of 1945~2018. Pollution sources were quantified and determined with a PMF (positive matrix factorization) model, the zones for pollution sources analyzed with a HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model, and the influencing mechanism of primary parameters of urbanization to the history of PAH sedimentation analyzed using the stochastic influence model (STIRPAT). The research showed the total content of 16 kinds of PAHs was 51.07~583.73ng/g, and that 3~4 rings were dominant components. Over 70 years, variations in total contents of PAHs in sediments have generally been shown by a trend characterized by slow fluctuations, violent fluctuations, and rapid increases. In the 1990s, the total content of PAHs and their components started to show more frequent fluctuating increases, and reached their peak values in 2012. PAHs in the sediments of Bosten Lake originate from fossil fuel source of combustion, petroleum leakage/biomass source of combustion, and traffic source, of which the sources of combustion are their main sources. The primary input trajectory of PAHs pollutants starts from the northwest, passing Bayingol Mongolian Autonomous Prefecture to Bosten Lake. Each 1% increase in the industrial value added of Bayingol Mongolian Autonomous Prefecture will result in 0.5178% increase in the content of PAH. It is a main factor for accumulation of PAHs in the sediments in Bosten Lake.

ACS Style

Huajie Sun; Li Sun; Shuying Zang. History of atmospheric PAHs sedimentation and response to human activities in Bosten Lake in Western China. Arabian Journal of Geosciences 2021, 14, 1 -11.

AMA Style

Huajie Sun, Li Sun, Shuying Zang. History of atmospheric PAHs sedimentation and response to human activities in Bosten Lake in Western China. Arabian Journal of Geosciences. 2021; 14 (11):1-11.

Chicago/Turabian Style

Huajie Sun; Li Sun; Shuying Zang. 2021. "History of atmospheric PAHs sedimentation and response to human activities in Bosten Lake in Western China." Arabian Journal of Geosciences 14, no. 11: 1-11.

Journal article
Published: 26 March 2021 in Sustainability
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In recent years, black soil has decreased and degenerated heavily due to complicated functions of natural and artificial factors. Hence, characterizing distributions of particle sizes in black soil and their environmental influencing factors is important for understanding black soil degradation. A total of 116 surface soil samples in the top 20 cm from a typical black soil region in northeastern China were collected, and the spatial distribution of particle size parameters were characterized. Particle size-sensitive components were extracted quantitatively using the log-normal distribution function, and their environmental implications were investigated. The contents of black soil mechanical composition ranged from 7.8% to 79.3% for clay, 17.7% to 80.3% for silt, and 0% to 73.7% for sand, respectively. Median particle size ranged from 1.71 to 142.67 μm, with a coefficient of variation of 60%, indicating silt accounted for the majority of the composition. Four environmentally sensitive components were identified, including long-distance transported airborne deposits of clay dust (C1), successions from local parent materials (C2), short-distance deposits of silt particles (C3), and a component strongly disturbed by human activities (C4). C1 and C2 had relatively low variations, with C1 exhibiting the smallest variation, and C2 contributing highest proportion, showing no significant differences across all samples. C3 widely existed across samples, suggesting common wind erosion within the black soil region. C3 and C4 varied spatially, which was caused by the low vegetation coverage and high human disturbance of agricultural topsoil. The results suggest that windbreaks should be encouraged to reduce wind erosion in the black soil regions.

ACS Style

Binghe Yan; Yulan Zhang; Shuying Zang; Qiang Chen; Li Sun. Distributions of Particle Sizes in Black Soil and Their Environmental Significance in Northeast China. Sustainability 2021, 13, 3706 .

AMA Style

Binghe Yan, Yulan Zhang, Shuying Zang, Qiang Chen, Li Sun. Distributions of Particle Sizes in Black Soil and Their Environmental Significance in Northeast China. Sustainability. 2021; 13 (7):3706.

Chicago/Turabian Style

Binghe Yan; Yulan Zhang; Shuying Zang; Qiang Chen; Li Sun. 2021. "Distributions of Particle Sizes in Black Soil and Their Environmental Significance in Northeast China." Sustainability 13, no. 7: 3706.

Article
Published: 05 February 2021 in Ecotoxicology
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Evidence from terrestrial sedimentary heavy metals record is a robust indicator of anthropogenic activity changes. Heavy metals and particle sizes in 210Pb-dated sediment cores extracted from Hulun and Chagan lakes were measured to reconstruct the sediment record and evaluated health risk of heavy metals in the last 150 years in Northeast China. In general, the particle size of Hulun Lake was finer with more contents of clay than Chagan Lake, while the concentrations of most heavy metals in Hulun Lake was lower. Prior to the 1970s, significant positive correlations between most heavy metals and clay, indicating that that they were likely co-transported and both lakes were dominated by natural inputs. The two records showed significant increases in concentrations of heavy metals between 1970s and 1990s, which were associated with recent anthropogenic activities derived from principal component analysis of clay and heavy metals. Specifically, the exploitation of mineral resources and traffic source in the Hulun Lake, and the emissions of pesticides and fertilizers from agricultural activity, and the combustions of coal and fossil fuels from industrial activity in the Chagan Lake. Since 1990s, natural processes was the main source of heavy metals in Hulun Lake due to the environmental protection policy, while emissions of industrial, agricultural and domestic sewage were still the main source in Chagan Lake. Overall carcinogenic risks caused by single heavy metal elements determined for the two lakes were considered to be acceptable. However, Cr was associated with a risk for children across since 1970s which should be paid more attention.

ACS Style

Ruifeng Xie; Deyao Sun; Li Sun; Nannan Zhang; Jiawei Zhang; Shuying Zang. Sediment record of heavy metals over the last 150 years in Northeast China: implications for regional anthropogenic activities. Ecotoxicology 2021, 30, 1354 -1365.

AMA Style

Ruifeng Xie, Deyao Sun, Li Sun, Nannan Zhang, Jiawei Zhang, Shuying Zang. Sediment record of heavy metals over the last 150 years in Northeast China: implications for regional anthropogenic activities. Ecotoxicology. 2021; 30 (7):1354-1365.

Chicago/Turabian Style

Ruifeng Xie; Deyao Sun; Li Sun; Nannan Zhang; Jiawei Zhang; Shuying Zang. 2021. "Sediment record of heavy metals over the last 150 years in Northeast China: implications for regional anthropogenic activities." Ecotoxicology 30, no. 7: 1354-1365.

Article
Published: 16 October 2020 in Ecotoxicology
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Polycyclic aromatic hydrocarbons (PAHs) in an AMS 14C-dated permafrost soil core extracted from continuous permafrost zone were measured to reconstruct the pollution history from the early Holocene (ca. 15480 a BP) and its potential risks under climate changes were evaluated in northeast China. Total PAH concentrations varied from 209 to 2161 ng/g through the core, which were moderately contaminated in the surface but heavily contaminated historically. Factor analysis indicated that volcanic activity, diagenesis from biological precursors and palaeo forest fires were dominant PAH sources, while petroleum emission was identified in the active layer due to the construction of China–Russia oil pipeline. Significant increases in 5-ring, 6-ring and 7 carcinogenic PAHs (p < 0.05) were observed from surface to the interface of the active layer and ice-rich permafrost layer, showing a selective downward migration in the active layer which might be effected by the repetitive cycles of freezing and thawing. Results implied that PAHs in the ice-rich permafrost layer could lead to an unpredictably serious consequence under the further climate warming.

ACS Style

Yanan Li; Shuying Zang; Ke Zhang; Deyao Sun; Li Sun. Occurrence, sources and potential risks of polycyclic aromatic hydrocarbons in a permafrost soil core, northeast China. Ecotoxicology 2020, 30, 1315 -1324.

AMA Style

Yanan Li, Shuying Zang, Ke Zhang, Deyao Sun, Li Sun. Occurrence, sources and potential risks of polycyclic aromatic hydrocarbons in a permafrost soil core, northeast China. Ecotoxicology. 2020; 30 (7):1315-1324.

Chicago/Turabian Style

Yanan Li; Shuying Zang; Ke Zhang; Deyao Sun; Li Sun. 2020. "Occurrence, sources and potential risks of polycyclic aromatic hydrocarbons in a permafrost soil core, northeast China." Ecotoxicology 30, no. 7: 1315-1324.

Journal article
Published: 27 February 2020 in Atmosphere
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Over the past few decades, concentrations of carbon dioxide (CO2), a key greenhouse gas, have risen at a global rate of approximately 2 ppm/a. China is the largest CO2 emitter and is the principle contributor to the increase in global CO2 levels. Based on a satellite-retrieved atmospheric carbon dioxide column average dry air mixing ratio (XCO2) dataset, derived from the greenhouse gas observation satellite (GOSAT), this paper evaluates the spatial and temporal variations of XCO2 characteristics in China during 2009–2016. Moreover, the factors influencing changes in XCO2 were investigated. Results showed XCO2 concentrations in China increased at an average rate of 2.28 ppm/a, with significant annual seasonal variations of 6.78 ppm. The rate of change of XCO2 was greater in south China compared to other regions across China, with clear differences in seasonality. Seasonal variations in XCO2 concentrations across China were generally controlled by vegetation dynamics, characterized by the Normalized Difference Vegetation Index (NDVI). However, driving factors exhibited spatial variations. In particular, a distinct belt (northeast–southwest) with a significant negative correlation (r < −0.75) between XCO2 and NDVI was observed. Furthermore, in north China, human emissions were identified as the dominant influencing factor of total XCO2 variations (r > 0.65), with forest fires taking first place in southwest China (r > 0.47). Our results in this study can provide us with a potential way to better understand the spatiotemporal changes of CO2 concentration in China with NDVI, human activity and biomass burning, and could have an enlightening effect on slowing the growth of CO2 concentration in China.

ACS Style

Zhenghan Lv; Yusheng Shi; Shuying Zang; Li Sun. Spatial and Temporal Variations of Atmospheric CO2 Concentration in China and Its Influencing Factors. Atmosphere 2020, 11, 231 .

AMA Style

Zhenghan Lv, Yusheng Shi, Shuying Zang, Li Sun. Spatial and Temporal Variations of Atmospheric CO2 Concentration in China and Its Influencing Factors. Atmosphere. 2020; 11 (3):231.

Chicago/Turabian Style

Zhenghan Lv; Yusheng Shi; Shuying Zang; Li Sun. 2020. "Spatial and Temporal Variations of Atmospheric CO2 Concentration in China and Its Influencing Factors." Atmosphere 11, no. 3: 231.