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  • thumbnail.journal.alt
    Item type:Doctoral Dissertation, Access status: Restricted ,
    Zastosowanie stymulacji laserowej wybranych gatunków hydrofitów do zwiększenia ich zdolności bioremediacyjnych
    (Data obrony: 2008) Śliwka, Małgorzata
    Wydział Geodezji Górniczej i Inżynierii Środowiska
    Effects of photostimulation by monochromatic, coherent and polarized light on biological material increase the base of the activation of biological mechanisms (activation of enzymes of mitochondrial fraction). The aim of experiment was an attempt to increase the efficiency of hydrobotanical sewage treatment plant by the photostimulation of duckweed (Lemna minor) and yellow iris (Iris pseudoacorus) with a laser diodes ($\lambda$-660 nm, $\lambda$=473 nm) and argon laser ($\lambda$=514 nm). The experimental groups of equal quantities were exposed to variable parameters of laser stimulation: the type of diod, lenght of wave, time and power of radiation. The results of experiments showed that photostimulation by laser light significantly speeds up cell divisions and causes a significant growth of biomass driving to quicker and more efficient uptake of biogenic elements contained in sewage, slowing down the process of eutrophication. A factor that limited hydrobotanical sewage treatment process in temperate climate was short duration of the vegetation season of plants and their sensitivity to hypothermia. The laser biostimulation of plants increased their ecological valence in unfavorable environmental conditions. Laser biotechnology is also promising for more efficient bioremediation of trace elements ($Ni, Zn, Cd, Pb$) from sewage.