@inproceedings{SutLohmannFischerRepmannetal., author = {Sut-Lohmann, Magdalena and Fischer, Thomas and Repmann, Frank and Raab, Thomas}, title = {Feasibility of field portable near infrared (NIR) spectroscopy to determine cyanide concentrations in soil}, series = {European Geosciences Union, General Assembly 2013, Vienna, Austria, 07 - 12 April 2013}, booktitle = {European Geosciences Union, General Assembly 2013, Vienna, Austria, 07 - 12 April 2013}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, abstract = {In Germany, at more than 1000 sites, soil is polluted with an anthropogenic contaminant in form of iron-cyanide complexes. These contaminations are caused by former Manufactured Gas Plants (MGPs), where electricity for lighting was produced in the process of coal gasification. The production of manufactured gas was restrained in 1950, which caused cessation of MGPs. Our study describes the application of Polychromix Handheld Field Portable Near-Infrared (NIR) Analyzer to predict the cyanide concentrations in soil. In recent times, when the soil remediation is of major importance, there is a need to develop rapid and non-destructive methods for contaminant determination in the field. In situ analysis enables determination of 'hot spots', is cheap and time saving in comparison to laboratory methods. This paper presents a novel usage of NIR spectroscopy, where a calibration model was developed, using multivariate calibration algorithms, in order to determine NIR spectral response to the cyanide concentration in soil samples. As a control, the contaminant concentration was determined using conventional Flow Injection Analysis (FIA). The experiments revealed that portable near-infrared spectrometers could be a reliable device for identification of contamination 'hot spots', where cyanide concentration are higher than 2400 mg kg-1 in the field and >1750 mg kg-1 after sample preparation in the laboratory, but cannot replace traditional laboratory analyses due to high limits of detection.}, language = {en} } @misc{RodionovNiiAnnangFischeretal., author = {Rodionov, Andrei and Nii-Annang, Seth and Fischer, Thomas and Gattinger, Andreas and Bens, Oliver and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Cross-linked polyacrylates in post-mining substrates: persistence and effects on plant growth}, series = {Soil Use and Management}, volume = {30}, journal = {Soil Use and Management}, number = {1}, issn = {1475-2743}, doi = {10.1111/sum.12103}, pages = {78 -- 87}, abstract = {Application of hydrophilic polymers composed of cross-linked polyacrylate can improve soil water-holding capacity and accelerate the restoration of post-mining substrates. In this work, we studied the persistence of a polyacrylate polymer incorporated into a soil and its impact on plant nutrients at a reclamation site of former lignite mining in Lusatia (Germany). In contrast to autumn application, the incorporation of the polymer enhanced the sequestration of plant-derived carbon in the soil, which was reflected by a significant increase in the concentration of a lignin marker. Attenuated total reflexion-Fourier transform infrared spectra (ATR-FTIR) and total elemental contents in the applied polymer suggested an intensive cation exchange between the polymer framework and the soil-forming substrate. In addition, there was an enrichment of carbonaceous material, which seems to reduce the swelling and thus the water-holding capacity of the cross-linked polyacrylate. Conversely, this process protected the polymer structure from rapid decomposition.}, language = {en} } @incollection{BachmannBensElmeretal., author = {Bachmann, Ute and Bens, Oliver and Elmer, Michael and Fischer, Thomas and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Boden und Standortqualit{\"a}t}, series = {Nachhaltige Bewirtschaftung von Eichen-Kiefern-Mischbest{\"a}nden : im Spannungsfeld von Klimawandel, Waldumbau und internationalem Holzmarkt}, booktitle = {Nachhaltige Bewirtschaftung von Eichen-Kiefern-Mischbest{\"a}nden : im Spannungsfeld von Klimawandel, Waldumbau und internationalem Holzmarkt}, editor = {Elmer, Michael and K{\"a}tzel, Ralf and Bens, Oliver and Bues, Claus-Thomas and Sonntag, Herbert and H{\"u}ttl, Reinhard F.}, publisher = {oekom}, address = {M{\"u}nchen}, isbn = {978-3-86581-196-7}, pages = {31 -- 44}, language = {de} } @misc{FischerBergmannHuettl, author = {Fischer, Thomas and Bergmann, Charlotte and H{\"u}ttl, Reinhard F.}, title = {Soil carbon and nitrogen budget in Scots pine (Pinus sylvestris L) stands along an air pollution gradient in Eastern Germany}, language = {en} } @misc{BergmannFischerHuettl, author = {Bergmann, Charlotte and Fischer, Thomas and H{\"u}ttl, Reinhard F.}, title = {Significance of litter- and humus-layer quality for rates and forms of N cycling in moder- to rawhumus-moder profiles under Scots pine (Pinus sylvestris L.)}, language = {en} } @misc{Fischer, author = {Fischer, Thomas}, title = {Substantial rewetting phenomena on soil respiration can be observed at low water availability}, language = {en} } @misc{FischerVesteWieheetal., author = {Fischer, Thomas and Veste, Maik and Wiehe, Wolfgang and Lange, Philipp}, title = {Water repellency and pore clogging at early successional stages of microbiotic crusts on inland dunes, Brandenburg, NE Germany}, language = {en} } @inproceedings{Fischer, author = {Fischer, Thomas}, title = {Following chemical changes of Scots pine (Pinus sylvestris L.) root litter during decomposition using FTIR}, series = {Woody root processes - Impact of different tree species, University of Tartu, Estonia, 05-09 June 2005}, booktitle = {Woody root processes - Impact of different tree species, University of Tartu, Estonia, 05-09 June 2005}, publisher = {Tartu University Press}, address = {Tartu}, isbn = {9949-11-079-3}, pages = {21}, language = {en} } @misc{Fischer, author = {Fischer, Thomas}, title = {Einfluß ausgew{\"a}hlter Fruchtfolgen und Fruchtarten auf die Kohlenstoffdynamik des Bodens auf einem grundwasserfernen Sandstandort}, series = {Mitteilungen der Gesellschaft f{\"u}r Pflanzenbauwissenschaften}, volume = {4}, journal = {Mitteilungen der Gesellschaft f{\"u}r Pflanzenbauwissenschaften}, issn = {0934-5116}, pages = {339 -- 342}, language = {de} } @misc{Fischer, author = {Fischer, Thomas}, title = {Einfluß von Winterweizen und Winterroggen in Fruchtfolgen mit unterschiedlichem Getreideanteil auf die mikrobielle Biomasse und die jahreszeitliche Kohlenstoffdynamik des Bodens}, series = {Archiv f{\"u}r Acker- und Pflanzenbau und Bodenkunde}, volume = {37}, journal = {Archiv f{\"u}r Acker- und Pflanzenbau und Bodenkunde}, issn = {0365-0340}, pages = {181 -- 189}, language = {de} }