Resistance of solonetzic soils to rocket and space activity impact in central Kazakhstan.

Risultato della ricerca: Otherpeer review

Abstract

Introduction. This paper provides the results of a comparative analysis of physicochemicaland biological characteristics of soil cover at the fall places of the firststage of “Proton" Launch vehicle (LV) in the area of Yu-2 (Central Kazakhstan). Inparticular, we considered the ecological stability of brown solonetzic soils in combinationwith Solonetz soil, to chemical pollution and variability of soil microflorato mechanical stresses during the fall of the separated parts of space launch vehicles(SLV SP). Materials and Methods. We have chosen those Kazakhstan's territoriesthat are used by the Baikonur Cosmodrome as an impact areas of separatingparts of space launch vehicles (SLV SP IA), in June 2017, to conduct ecologicalstudies in those places, where the first-stage vehicles of the Proton rocket havebeen fallen in the Yu-2 zone (Central Kazakhstan). Here the pollution of UDMH(unsymmetric dimethylhydrazine, rocket fuel, substance of the 1st class of toxichazard) has been detected in soils in 2000-2007. Control point were also chosen inthe adjacent territory. Morphological and physico-chemical properties of soil profileshave been studied. In 10 soil samples, indicators of the state of microflora andphytotoxicity were determined. Results and Conclusions. Based on the results ofthe analysis of the characteristics of solonetzic soils at the fall places of separatedparts of space launch vehicles "Proton" in the Yu-2 zone (Central Kazakhstan), itwas concluded that they have high resistance to chemical pollution of UDMH. Theprocesses of physico-chemical transformation of UDMH and its processing by soilmicroorganisms are assumed in the illuvial B horizons, due to the high content ofexchangeable sodium, against the background of sufficient soil moisture with analkaline pH-medium (up to strongly alkaline). At the same time, low microbiologicalindices, the absence of spore-forming bacteria, and the presence of plant phytotoxicitywere found in soils of the fall places. Microbiological restoration of fertiletop soil in technogenic disturbed lands of the Yu-2 zone is extremely difficult inconditions of high soil alkalinity, in the presence of saline clay and increased contentof carbonates
Lingua originaleEnglish
Numero di pagine1
Stato di pubblicazionePublished - 2018

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