Agricultural reclamation of disturbed soils in a lignite mining area using municipal and coal wastes: the humus situation at the beginning of reclamation

摘要: Soils disturbed by long-term opencast mining were treated with organic waste materials for reclamation. Humic substances extracted from and soil samples analysed using pyrolysis-gas chromatography/mass spectrometry electrofocusing. Furthermore, analytical pyrolysis permits to study all starting in situ. According structural similarities, the statistical evaluation of results clearly indicates three sample groups. The first group, called compost, implies compost composted sewage sludge. Moreover, revealed that coal humic are predominant brown sludge, pure mine soils different materials. They constitute second group. sludge contains a high nitrogen potential, as expected, represents third Finally, generally showed specific characteristics fulvic acids, respectively. Electrofocusing yielded signal pattern is typical substances. However, number ratio signals differ according special features samples.