Ekofiziološke karakteristike nekih drvenastih vrsta biljaka i njihov potencijal za revitalizaciju deponije pepela termoelektrana
The ecophysiological characteristics of various woody plant species and their potential for revitalising fly ash deposits at thermoelectric power plants
Doctoral thesis (Published version)
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The revitalisation of fly ash deposits through the formation of a plant cover is apractice which can best reduce the risk to the environment and human health.Establishing a plant cover through sowing herbaceous plants and planting woodyspecies ensures the physical and chemical stabilisation of the ash, prevents winderosion, and reduces the dispersal of toxic, chemical elements into the environment. Thechoice of plant species for this purpose is an important factor which determines howeffective the revitalisation of the ash deposit site will be. The research that is the subject ofthis study was carried out at the fly ash deposits at the 'Nikola Tesla A' thermoelectricpower plant in Obrenovac ('TENT A'), which covers an area of 382 ha of fertile cultivatedland on the right bank of the River Sava. More specifically, it focussed on an active lagoon(L0), into which a pulp of ash and water (1:10) is sluiced, and two passive lagoons - L1,weathered for three years, and L2, weathered for 11 years, where the process of thetemporary, short-term biological restoration of these inactive ash deposit lagoons is beingcarried out. The aim of the research was to define the abiotic factors which limit thesurvival and growth of plants at fly ash deposit lagoons weathered for different lengths oftime, as well as to investigate ecophysiological, biochemical and morphologicalcharacteristics, and to study the adaptive responses of woody plant species to the effects ofmultiple stress. The study focussed on two planted species, tamarisk (Tamarix tetrandraPall.) and black locust (Robinia pseudoacacia L.) and two naturally colonized speciesfalse indigo (Amorpha fruticosa L.) and white poplar (Populus alba L.), whichcolonized the ash deposit sites from surrounding habitats. On the basis of the resultsobtained, these species’ capacity for survival in the conditions encountered at a fly ashdeposit site and their potential for being planted with the aim of revitalising this type ofhabitat were assessed.It was established that the limiting factors for plant survival and growth at the ‘TENTA’ fly ash deposits were the unfavourable physical and chemical characteristics of theash (its sandy composition which results in a low water content available to plants; itsfine texture and the formation of cemented layers in the ash that hinder the rooting ofplants; increased salinity and alkalinity; As, B, Cu, Mo, Se, Cr and Ni toxicity; and C,N, P, Mn and Zn deficiency)...
Keywords:Ash deposit; Revitalisation; Multiple stress; Macro and microelements; Vitality; Pigments; Phenols; Oxidative stress; Adaptive potential
Source:University of Belgrade, Faculty of Forestry, 2014, 1-431