Publications
20 results found
Wang L, Jin Y, Weiss DJ, et al., 2021, Possible application of stable isotope compositions for the identification of metal sources in soil, Journal of Hazardous Materials, Vol: 407, ISSN: 0304-3894
Metals in soil are potentially harmful to humans and ecosystems. Stable isotope measurement may provide "fingerprint" information on the sources of metals. In light of the rapid progress in this emerging field, we present a state-of-the-art overview of how useful stable isotopes are in soil metal source identification. Distinct isotope signals in different sources are the key prerequisites for source apportionment. In this context, Zn and Cd isotopes are particularly helpful for the identification of combustion-related industrial sources, since high-temperature evaporation-condensation would largely fractionate the isotopes of both elements. The mass-independent fractionation of Hg isotopes during photochemical reactions allows for the identification of atmospheric sources. However, compared with traditionally used Sr and Pb isotopes for source tracking whose variations are due to the radiogenic processes, the biogeochemical low-temperature fractionation of Cr, Cu, Zn, Cd, Hg and Tl isotopes renders much uncertainty, since large intra-source variations may overlap the distinct signatures of inter-source variations (i.e., blur the source signals). Stable isotope signatures of non-metallic elements can also aid in source identification in an indirect way. In fact, the soils are often contaminated with different elements. In this case, a combination of stable isotope analysis with mineralogical or statistical approaches would provide more accurate results. Furthermore, isotope-based source identification will also be helpful for comprehending the temporal changes of metal accumulation in soil systems.
Schleicher NJ, Dong S, Packman H, et al., 2020, A global assessment of copper, zinc, and lead isotopes in mineral dust sources and aerosols, Frontiers in Earth Science, Vol: 8, Pages: 1-20, ISSN: 2296-6463
The stable isotope compositions of Cu and Zn in major geochemical reservoirs are increasingly studied with the aim to develop these isotope systems as tools to investigate the global biogeochemical cycles of these trace metals. The objectives of the present study were (i) to expand the range of Cu, Zn, and Pb isotope compositions of mineral dust by analyzing samples from major mineral dust sources in Asia and Africa (Chinese Loess Plateau, Chinese deserts, Thar desert, Sahel region) and (ii) to assess the potential impact of human activities on the isotope composition of aerosols by synthesizing published Cu and Zn isotope compositions in aerosols and natural and anthropogenic sources. For the newly analyzed mineral dust areas in Asia and Africa, δ65CuNIST−976 values range from −0.54 to +0.52‰, δ66ZnJMC−Lyon values from −0.07 to +0.57‰, and 206Pb/204Pb values from 18.522 to 19.696. We find a significant geographic control with samples from the Thar Desert having the heaviest isotopic compositions (δ65CuNIST−976 = +0.48 ± 0.06‰, δ66ZnJMC−Lyon = +0.49 ± 0.11‰) and samples from the Sahel and the Badain Jaran desert having the lightest Zn isotope composition (δ66ZnJMC−Lyon = +0.19 ± 0.15‰ and +0.07 ± 0.07‰, respectively). We find important variations in the isotope signatures between particle size fractions with heavier isotopic compositions in the smallest and largest particle size fractions and lighter isotopic compositions in the mid particle size fractions. Associations with the mineralogical composition are less clear. Newly analyzed aerosol samples for Beijing and Xi'an show δ65CuNIST−976 values of +0.29 ± 0.19‰ and +0.16 ± 0.04‰, δ66ZnJMC−Lyon values of −0.36 ± 0.04‰ and +0.02 ± 0.06‰, and 206Pb/204Pb values of 18.129 ± 0.003 and 18
Linke C, Ibrahim I, Schleicher N, et al., 2016, A novel single-cavity three-wavelength photoacoustic spectrometer for atmospheric aerosol research, Atmospheric Measurement Techniques, Vol: 9, Pages: 5331-5346
<jats:p>Abstract. The spectral light-absorbing behavior of carbonaceous aerosols varies depending on the chemical composition and structure of the particles. A new single-cavity three-wavelength photoacoustic spectrometer was developed and characterized for measuring absorption coefficients at three wavelengths across the visible spectral range. In laboratory studies, several types of soot with different organic content were generated by a diffusion flame burner and were investigated for changes in mass-specific absorption cross section (MAC) values, absorption and scattering Ångström exponents (αabs and αsca), and single scattering albedo (ω). By increasing the organic carbonaceous (OC) content of the aerosol from 50 to 90 % of the total carbonaceous mass, for 660 nm nearly no change of MAC was found with increasing OC content. In contrast, for 532 nm a significant increase, and for 445 nm a strong increase of MAC was found with increasing OC content of the aerosol. Depending on the OC content, the Ångström exponents of absorption and scattering as well as the single scattering albedo increased. These laboratory results were compared to a field study at a traffic-dominated urban site, which was also influenced by residential wood combustion. For this site a daily average value of αabs(445–660) of 1.9 was found. </jats:p>
Chen Y, Schleicher N, Cen K, et al., 2016, Evaluation of impact factors on PM 2.5 based on long-term chemical components analyses in the megacity Beijing, China, Chemosphere, Vol: 155, Pages: 234-242, ISSN: 0045-6535
Chen Y, Schleicher N, Fricker M, et al., 2016, Long-term variation of black carbon and PM2.5 in Beijing, China with respect to meteorological conditions and governmental measures, Environmental Pollution, Vol: 212, Pages: 269-278, ISSN: 0269-7491
Schleicher NJ, Schäfer J, Chen Y, et al., 2016, Atmospheric particulate mercury in the megacity Beijing: Efficiency of mitigation measures and assessment of health effects, Atmospheric Environment, Vol: 124, Pages: 396-403, ISSN: 1352-2310
Norra S, Yu Y, Dietze V, et al., 2016, Seasonal dynamics of coarse atmospheric particulate matter between 2.5 μm and 80 μm in Beijing and the impact of 2008 Olympic Games, Atmospheric Environment, Vol: 124, Pages: 109-118, ISSN: 1352-2310
Schleicher NJ, Schäfer J, Blanc G, et al., 2015, Atmospheric particulate mercury in the megacity Beijing: Spatio-temporal variations and source apportionment, Atmospheric Environment, Vol: 109, Pages: 251-261, ISSN: 1352-2310
Chen Y, Schleicher N, Chen Y, et al., 2014, The influence of governmental mitigation measures on contamination characteristics of PM2.5 in Beijing, Science of The Total Environment, Vol: 490, Pages: 647-658, ISSN: 0048-9697
Schleicher N, Norra S, Fricker M, et al., 2013, Spatio-temporal variations of black carbon concentrations in the Megacity Beijing, Environmental Pollution, Vol: 182, Pages: 392-401, ISSN: 0269-7491
Holbach A, Wang L, Chen H, et al., 2013, Water mass interaction in the confluence zone of the Daning River and the Yangtze River—a driving force for algal growth in the Three Gorges Reservoir, Environmental Science and Pollution Research, Vol: 20, Pages: 7027-7037, ISSN: 0944-1344
Schleicher N, Cen K, Norra S, 2013, Daily variations of black carbon and element concentrations of atmospheric particles in the Beijing megacity – Part 1: General temporal course and source identification, Geochemistry, Vol: 73, Pages: 51-60, ISSN: 0009-2819
Schleicher N, Norra S, Chen Y, et al., 2012, Efficiency of mitigation measures to reduce particulate air pollution—A case study during the Olympic Summer Games 2008 in Beijing, China, Science of The Total Environment, Vol: 427-428, Pages: 146-158, ISSN: 0048-9697
Bergmann A, Bi Y, Chen L, et al., 2012, The Yangtze-Hydro Project: a Chinese–German environmental program, Environmental Science and Pollution Research, Vol: 19, Pages: 1341-1344, ISSN: 0944-1344
Schleicher N, Kramar U, Dietze V, et al., 2012, Geochemical characterization of single atmospheric particles from the Eyjafjallajökull volcano eruption event collected at ground-based sampling sites in Germany, Atmospheric Environment, Vol: 48, Pages: 113-121, ISSN: 1352-2310
Schleicher N, Norra S, Dietze V, et al., 2011, The effect of mitigation measures on size distributed mass concentrations of atmospheric particles and black carbon concentrations during the Olympic Summer Games 2008 in Beijing, Science of The Total Environment, Vol: 412-413, Pages: 185-193, ISSN: 0048-9697
Schleicher NJ, Norra S, Chai F, et al., 2011, Temporal variability of trace metal mobility of urban particulate matter from Beijing – A contribution to health impact assessments of aerosols, Atmospheric Environment, Vol: 45, Pages: 7248-7265, ISSN: 1352-2310
Yu Y, Schleicher N, Norra S, et al., 2011, Dynamics and origin of PM<sub>2.5</sub>during a three-year sampling period in Beijing, China, J. Environ. Monit., Vol: 13, Pages: 334-346, ISSN: 1464-0325
Schleicher N, Recio Hernández C, 2010, Source identification of sulphate forming salts on sandstones from monuments in Salamanca, Spain—a stable isotope approach, Environmental Science and Pollution Research, Vol: 17, Pages: 770-778, ISSN: 0944-1344
Schleicher N, Norra S, Chai F, et al., 2010, Anthropogenic versus geogenic contribution to total suspended atmospheric particulate matter and its variations during a two-year sampling period in Beijing, China, J. Environ. Monit., Vol: 12, Pages: 434-441, ISSN: 1464-0325
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