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| 1 | Relationship between fluorescence characteristics and molecular weight distribution of natural dissolved organic matter in Lake Hongfeng and Lake Baihua,China显示文摘Dissolved organic matter (DOM) is one of the most interesting and difficult problems in recent years due to its important functions in the ecological and environmental system and the complexity of its chemical composition and structure. It is well ac- cepted that fluorescence characteristics and mo- lecular weight distribution are two important pa- rameters in the DOM characterization. However, the relationship between them is still unknown. In this study, fluorescence and molecular weight distribution of DOM in Lake Hongfeng, Lake Baihua and their rivers, and their relationship were investigated using the combination of fluorescence spectroscopy and high-performance size exclusion chromatography (HPSEC) with on-line UV absorbance and fluores- cence detectors. The results show that there were two obvious humic-like fluorescence peaks (Peaks A and B) in DOM from lake water. But there was an- other obvious protein-like fluorescence peak (Peak C) in DOM from river water. The humic-like fluorescence material consisted of DOM fraction with smaller mo- lecular weight, ranging from 1.0 to 3.0 kDa, while the protein-like fluorescence material mainly consisted of DOM fraction with MW larger than 2.0 kDa. The cal- culation of MW using HPSEC was related to the UV absorbance wavelength chosen. | YUE Lanxiu WU Fengchang LiU Congqiang LI Wen FU Pingqing BAI Yingchen WANG Liying YIN Zuoying Lü Zhicheng | 2006 | Chinese Science Bulletin2006，51，1： | 9 |
| 2 | Sources, evolution and impacts of EC and OC in snow on sea ice: a measurement study in Barrow, Alaska显示文摘Based on the field measurements in Barrow, Alaska within the period of April-May 2015, we investigate the sources and variations of elemental carbon(EC) and organic carbon(OC) in the surface layer of snowpack on sea ice, and estimate their effects on the sea ice albedo. Results show that the snow OC in Barrow are from natural sources(e.g. terrestrial higher plants and micro-organisms) mainly, as well as biomass burning(e.g. forest fires and straw combustion) as an important part. Both EC and OC can accumulate at the snow surface with snow melt. The variations in EC and OC and liquid water content in the snow layer are well consistent during the snow-melting period. A higher rate of snow melt implied a more efficient enrichment of EC and OC. In the last phase of snow melt, the concentration increased to a maximum of 16.2 ng/g for EC and 128 ng/g for OC, which is ~10 times larger than those before snow melt onset. Except for the dominant influence of melt amplification mechanism, the variation in concentrations of EC and OC could be disturbed by the air temperature fluctuation and snowfall. Our study indicates that the lightabsorbing impurities contributed 1.6%-5.1% to the reduction in sea ice albedo with melt during the measurement period. The significant period oflight-absorbing impurities influencing on sea ice albedo begins with the rapid melting of overlying snow and ends before the melt ponds formed widely, which lasted for about 10 days in Barrow, 2015. | Tingfeng Dou Cunde Xiao Zhiheng Du J. J. Schauer Hong Ren Baozhu Ge Aihong Xie Jihua Tan Pingqing Fu Yuanxun Zhang | 2017 | Science Bulletin2017，62，22： | 6 |
| 3 | Characteristics of organic phosphorus fractions in different trophic sediments of lakes from the middle and lower reaches of Yangtze River region and Southwestern Plateau, China显示文摘 | Runyu Zhang Fengchang Wu Congqiang Liu Pingqing Fu Wen Li Liying Wang Haiqing Liao Jianyang Guo | 2007 | Environmental Pollution2007，，2： | 5 |
| 4 | Chemical formation and source apportionment of PM_(2.5) at an urban site at the southern foot of the Taihang mountains显示文摘The region along the Taihang Mountains in the North China Plain(NCP) is characterized by serious fine particle pollution. To clarify the formation mechanism and controlling factors, an observational study was conducted to investigate the physical and chemical properties of the fine particulate matter in Jiaozuo city, China. Mass concentrations of the water-soluble ions(WSIs) in PM_(2.5) and gaseous pollutant precursors were measured on an hourly basis from December 1, 2017, to February 27, 2018. The positive matrix factorization(PMF) method and the FLEXible PARTicle(FLEXPART) model were employed to identify the sources of PM_(2.5). The results showed that the average mass concentration of PM_(2.5) was 111 μg/m^(3) during the observation period. Among the major WSIs, sulfate, nitrate, and ammonium(SNA) constituted 62% of the total PM_(2.5) mass, and NO_(3)^(-) ranked the highest with an average contribution of 24.6%. NH_(4)^(+) was abundant in most cases in Jiaozuo. According to chemical balance analysis, SO_(2)-4, NO_(3)^(-), and Cl^(-) might be present in the form of(NH_4)_(2)SO_4, NH_4NO_3, NH_4Cl, and KCl. The liquid-phase oxidation of SO_(2) and NO_(2) was severe during the haze period. The relative humidity and pH were the key factors influencing SO_(4)^(2-) formation. We found that NO_(3)^(-) mainly stemmed from homogeneous gas-phase reactions in the daytime and originated from the hydrolysis of N_(2)O_5 in the nighttime, which was inconsistent with previous studies. The PMF model identified five sources of PM_(2.5) : secondary origin(37.8%), vehicular emissions(34.7%), biomass burning(11.5%), coal combustion(9.4%), and crustal dust(6.6%). | Xiaoyong Liu Mingshi Wang Xiaole Pan Xiyue Wang Xiaolong Yue Donghui Zhang Zhigang Ma Yu Tian Hang Liu Shandong Lei Yuting Zhang Qi Liao Baozhu Ge Dawei Wang Jie Li Yele Sun Pingqing Fu Zifa Wang Hong He | 2021 | Journal of Environmental Sciences2021，33，5： | 5 |
| 5 | Airborne particulate matter pollution in urban China: a chemical mixture perspective from sources to impacts显示文摘Rapid urban and industrial development has resulted in severe air-pollution problems in developing countries such as China, especially in highly industrialized and populous urban clusters. Dissecting the complex mixtures of airborne particulate matter(PM) has been a key scientific focus in the last two decades,leading to significant advances in understanding physicochemical compositions for comprehensive source apportionment. However, identifying causative components with an attributable link to population-based health outcomes remains a huge challenge. The microbiome, an integral dimension of the PM mixture, is an unexplored frontier in terms of identities and functions in atmospheric processes and human health. In this review, we identify the major gaps in addressing these issues, and recommend a holistic framework for evaluating the sources, processes and impacts of atmospheric PM pollution. Such an approach and the knowledge generated will facilitate the formulation of regulatory measures to control PM pollution in China and elsewhere. | Ling Jin Xiaosan Luo Pingqing Fu Xiangdong Li | 2017 | National Science Review2017，4，4： | 5 |
| 6 | Ultraviolet absorbance titration for the determination of conditional stability constants of Hg(Ⅱ) and dissolved organic matter显示文摘Strong interaction between natural dissolved organic matter (DOM) and Hg(Ⅱ) may influence the trans- port, conversion, toxicity and bio-validity of mercury in the environment. In this paper ultraviolet (UV) absorbance titration was employed for the first time for the determination of the conditional stability constants of Hg(Ⅱ) and (DOM). With increasing Hg(Ⅱ) concentrations, the UV absorbance of fulvic acid, humic acid, and DOM in river increases progressively. By linear and non-linear model fitting, the conditional stability constants (lgK) of Hg(Ⅱ) and DOM were worked out to be 3.54?4.93 and 3.64?4.85, respectively. The results are consistent with those acquired by the typical fluorescence quenching titration method, with the maximum relative error of lgK being 2.6% and the average relative error being 0.2%. The UV absorbance titration method has the advantages of rapid determination, simple performance, and it will probably become a new approach to studying interactions between DOM and trace metallic ions. | BAI Yingchen WU Fengchang WAN Guojing LIU Congqiang FU Pingqing LI Wen | 2008 | Chinese Journal Of Geochemistry2008，27，1： | 3 |
| 7 | Evolutionary processes and sources of high-nitrate haze episodes over Beijing,Spring显示文摘Rare and consecutive high-nitrate haze pollution episodes were observed in Beijing in spring2012. We present detailed characterization of the sources and evolutionary mechanisms of this haze pollution, and focus on an episode that occurred between 15 and 26 April. Submicron aerosol species were found to be substantially elevated during haze episodes, and nitrates showed the largest increase and occupation(average: 32.2%) in non-refractory submicron particles(NR-PM_1), which did not occur in other seasons as previously reported. The haze episode(HE) was divided into three sub-episodes, HEa, HEb, and HEc. During HEa and HEc, a shallow boundary layer, stagnant meteorological conditions, and high humidity favored the formation of high-nitrate concentrations, which were mainly produced by three different processes —daytime photochemical production, gas-particle partitioning, and nighttime heterogeneous reactions — and the decline in visibility was mainly induced by NR-PM_1.However, unlike HEa and HEc, during HEb, the contribution of high nitrates was partly from the transport of haze from the southeast of Beijing — the transport pathway was observed at ~800–1000 m by aerosol Lidar —and the decline in visibility during HEb was primarily caused by PM_(2.5). Our results provide useful information for air quality improvement strategies in Beijing during Spring. | Ting Yang Yele Sun Wei Zhang Zifa Wang Xingang Liu Pingqing Fu Xiquan Wang | 2017 | Journal of Environmental Sciences2017，29，4： | 2 |
| 8 | Sources of organic matter and paleo-environmental implications inferred from carbon isotope compositions of lacustrine sediments at Inexpressible Island, Ross Sea, Antarctica显示文摘The carbon isotopic composition of organic matter(δ^(13)C_(org)) was determined in two sediment cores(IIL1 and IIL9) recovered from Inexpressible Island, Ross Sea, Antarctica, and analyzed to identify the sources of that organic matter. The δ^(13)C_(org) values of sediments of IIL9 were found to vary between-14.6‰ and-11.6‰, with a mean of-13.4‰(n=48). These values were significantly higher than those of IIL1 sediments which varied between-23.2‰ and-20.4‰, with a mean of-21.8‰(n=55). The variation in δ^(13)C_(org) values in these two sediment cores indicate different sources of organic matter. The relatively high δ^(13)C_(org) values in IIL9 are in accordance with a source from algae, while the low δ^(13)C_(org) values in IIL1 evince significant influence from penguin guano with algae as the secondary source. Compared with the reference data from other high-latitude lake sediments and plants, the δ^(13)C_(org) values in IIL9 were extremely high, a result likely related to intense competition for CO_2 assimilation among algal species during the growing season in this relatively shallow pond. These results indicate that sedimentary δ^(13)C_(org) is a reliable proxy for paleo-primary productivity in ponds at Inexpressible Island. | WEI Yangyang JIN Jing NIE Yaguang CHEN Xin WU Libin FU Pingqing LIU Xiaodong Steven D.Emslie | 2016 | Advances in Polar Science2016，27，4： | 2 |
| 9 | Recent Progress in Atmospheric Chemistry Research in China: Establishing a Theoretical Framework for the “Air Pollution Complex”显示文摘Atmospheric chemistry research has been growing rapidly in China in the last 25 years since the concept of the“air pollution complex”was first proposed by Professor Xiaoyan TANG in 1997.For papers published in 2021 on air pollution(only papers included in the Web of Science Core Collection database were considered),more than 24000 papers were authored or co-authored by scientists working in China.In this paper,we review a limited number of representative and significant studies on atmospheric chemistry in China in the last few years,including studies on(1)sources and emission inventories,(2)atmospheric chemical processes,(3)interactions of air pollution with meteorology,weather and climate,(4)interactions between the biosphere and atmosphere,and(5)data assimilation.The intention was not to provide a complete review of all progress made in the last few years,but rather to serve as a starting point for learning more about atmospheric chemistry research in China.The advances reviewed in this paper have enabled a theoretical framework for the air pollution complex to be established,provided robust scientific support to highly successful air pollution control policies in China,and created great opportunities in education,training,and career development for many graduate students and young scientists.This paper further highlights that developing and low-income countries that are heavily affected by air pollution can benefit from these research advances,whilst at the same time acknowledging that many challenges and opportunities still remain in atmospheric chemistry research in China,to hopefully be addressed over the next few decades. | Tong ZHU Mingjin TANG Meng GAO Xinhui BI Junji CAO Huizheng CHE Jianmin CHEN Aijun DING Pingqing FU Jian GAO Yang GAO Maofa GE Xinlei GE Zhiwei HAN Hong HE Ru-Jin HUANG Xin HUANG Hong LIAO Cheng LIU Huan LIU Jianguo LIU Shaw Chen LIU Keding LU Qingxin MA Wei NIE Min SHAO Yu SONG Yele SUN Xiao TANG Tao WANG Tijian WANG Weigang WANG Xuemei WANG Zifa WANG Yan YIN Qiang ZHANG Weijun ZHANG Yanlin ZHANG Yunhong ZHANG Yu ZHAO Mei ZHENG Bin ZHU Jiang ZHU | 2023 | Advances in Atmospheric Sciences2023，40，8： | 2 |
| 10 | New insights into the sources and formation of carbonaceous aerosols in China:potential applications of dual-carbon isotopes显示文摘Carbonaceous aerosols account for20-50%of total fine particulate matter(PM_(2.5),particles with a diameter of2.5μm or less)mass concentration in polluted urban atmospheres and can affect atmospheric chemistry,air quality,environmental health and Earth's radiation balance[1].Bulk | Fang Cao Yanlin Zhang Lujie Ren Junwen Liu Jun Li Gan Zhang Di Liu Yele Sun Zifa Wang Zongbo Shi Pingqing Fu | 2017 | National Science Review2017，4，6： | 2 |
| 11 | Fluorescence characterization of dissolved organic matter in an urban river and its complexation with Hg ( Ⅱ ) 显示文摘 | FU Pingqing WU Fengchang LIU Congqiang | 2007 | Appl Geochem2007，22，： | 1 |
| 12 | Fluorescence characterization of dissolved organic matter in an urban river and its complexation with Hg(II)显示文摘 | Pingqing Fu Fengchang Wu Congqiang Liu Feiyue Wang Wen Li Lanxiu Yue Qingjun Guo | 2007 | Applied Geochemistry2007，，8： | 1 |
| 13 | Characteristics of organic phosphorus fractions in different trophic sediments of lakes from the middle and lower reaches of Yangtze River region and Southwestern Plateau, China显示文摘 | Runyu Zhang Fengchang Wu Congqiang Liu Pingqing Fu Wen Li Liying Wang Haiqing Liao Jianyang Guo | 2007 | Environmental Pollution2007，，2： | 1 |
| 14 | Organic molecular composition of marine aerosols over the Arctic Ocean in summer:contributions of primary emission and secondary aerosol formation 显示文摘 | FU Pingqing KAWAMURA K CHEN Jing | 2013 | Biogeosciences2013，10，2： | 1 |
| 15 | Temporal and spatial distributions of dissolved organic carbon and nitrogen in two small lakes on the Southwestern China Plateau显示文摘 | Wen Li Fengchang Wu Congqiang Liu Pingqing Fu Jing Wang Yi Mei Liying Wang Jianyang Guo | 2008 | Limnology2008，，2： | 1 |
| 16 | Transport Patterns and Potential Sources of Atmospheric Pollution during the ⅩⅩⅣ Olympic Winter Games Period显示文摘The attainment of suitable ambient air quality standards is a matter of great concern for successfully hosting the ⅩⅩⅣ Olympic Winter Games(OWG). Transport patterns and potential sources of pollutants in Zhangjiakou(ZJK) were investigated using pollutant monitoring datasets and a dispersion model. The PM_(2.5) concentration during February in ZJK has increased slightly(28%) from 2018 to 2021, mostly owing to the shift of main potential source regions of west-central Inner Mongolia and Mongolian areas(2015–18) to the North China Plain and northern Shanxi Province(NCPS) after 2018.Using CO as an indicator, the relative contributions of the different regions to the receptor site(ZJK) were evaluated based on the source-receptor-relationship method(SRR) and an emission inventory. We found that the relative contribution of pollutants from NCPS increased from 33% to 68% during 2019–21. Central Inner Mongolia(CIM) also has an important impact on ZJK under unfavorable weather conditions. This study demonstrated that the effect of pollution control measures in the NCPS and CIM should be strengthened to ensure that the air quality meets the standard during the ⅩⅩⅣ OWG. | Yuting ZHANG Xiaole PAN Yu TIAN Hang LIU Xueshun CHEN Baozhu GE Zhe WANG Xiao TANG Shandong LEI Weijie YAO Yuanzhe REN Yongli TIAN Jie LI Pingqing FU Jinyuan XIN Yele SUN Junji CAO Zifa WANG | 2022 | Advances in Atmospheric Sciences2022，39，10： | 1 |
| 17 | Fluorescence characterization of dissolved organic matter in an urban river and its complexation with Hg ( Ⅱ ) ion 显示文摘 | FU Pingqing WU Fengchang LIU Congqiang | 2007 | Applied Geochemistry2007，22，： | 1 |
| 18 | 显示文摘 | Fu Pingqing Wu Fengehang Liu Congqiang | 2007 | Applied Geochemistry2007，22，8： | 1 |
| 19 | Temporal and spatial distributions of dissolved organic carbon and nitrogen in two small lakes on the Southwestern China Plateau显示文摘 | Wen Li Fengchang Wu Congqiang Liu Pingqing Fu Jing Wang Yi Mei Liying Wang Jianyang Guo | 2008 | Limnology2008，，2： | 1 |
| 20 | Seasonal variations of sugars in atmospheric particulate matter from Gosan, Jeju Island: Significant contributions of airborne pollen and Asian dust in spring显示文摘 | Pingqing Fu Kimitaka Kawamura Minoru Kobayashi Bernd R.T. Simoneit | 2012 | Atmospheric Environment2012，，： | 1 |
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