Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

MENDELNET 2013correlated only with humic fraction of humic acids (Tab. 3), probably because humic acids containa wide variety of functional groups, which may react with metals (Livens, 1991). Content of heavymetals in soil is impacted by one another too, what is acknowledged by the correlation between Pband Cd (r = 0,672; p < 0,05).The detected values of lead´s and cadmium´s mobile forms in leachate 2 mol.l -1 HNO 3 are judgedby a decision of the Ministry of Agriculture of the Slovak Republic nb. 531/1994-540 „Limitarianvalues of danger inorganic substances in soil“. The limitarian value for content of lead is 30 mg.kg -1and of cadmium is 0,3 mg.kg -1 of dry solid, based on it can be said that content of lead was overlimited in every sample of soil, probably because according to Jomová et al. (2002) region longburdened waste metallurgical and mining activity causes high levels of heavy metals until today. Inthe course of weathering, the heavy metals are continuously accumulated (Ni et al., 2009), andhence the heavy metals deposition in Tatras mountain relates with automobility and on northernaspects there is evident the effect of transboundary air pollutants from Polland (Katowice) (Končeket al., 1973) and by Barančoková et al. (2009) are polluting sources from west and north locatedwithin 150-200 km (Ostrava and Krakow region, Silesia). In case of samples P 1 (Hlúpy) and P 3(Belianska Kopa) there was found to be an overlimited content of cadmium. (Tab. 2).Tab. 3 Correlation between of chemical properties (Belienske Tatras Mts.) (n=10)pH H2O pH KCl TOC N T C/N HA FA HS DHpH H2O xpH KCl 0,492 xCdTOC -0,513 -0,490 xN T -0,237 -0,158 0,543 XC/N -0,505 -0,509 0,935 ** 0,213 XHA -0,559 -0,555 0,873 ** 0,353 0,865 ** xFA -0,582 -0,547 -0,792 ** 0,305 0,792 ** 0,985 ** XHS -0,574 -0,553 0,833 ** 0,329 0,829 ** 0,996 ** 0,997 ** XDH -0,063 -0,163 -0,085 -0,225 -0,007 0,398 0,519 0,464 xCd -0,294 -0,464 0,718 * 0,109 0,798 ** 0,691 * -0,371 0,100 -0,340 XPb -0,586 -0,451 0,941 ** 0,461 0,896 ** 0,916 ** -0,416 0,201 -0,627 0,672 ** p < 0,05 ** p < 0,01CONCLUSIONSSorption of heavy metals in soil is impacted not only by the soil´s chemical properties, but also bythe anthropogenic effect and geological sub-soil, which contribute to soil enriching with heavymetals. The content of heavy metals is impacted by the content of TOC and is controlled by the soilmatrix and the composition of the soil solution. The results also show a high complexation capacityof humic acid for the heavy metals. The strength of binding of the two metals is in the sequence ofPb > Cd. Content of mobile form of lead is positively correlated with content of cadmium inBelianske Tatras Mountains soil. (r = 0,672; p < 0,05). The problem with heavy metals in soil istheirlackof degradability. That is why the monitoring of soils´ encumbrance by heavy metals is an importantaspect by evaluating the quality of soil and searching for ways to prevent soil contamination byheavy metals.REFERENCESALLOWAY, B.J., AYRES, D.C. 1994: Chemical principles of environmental pollution. Blackie A,London.ALLOWAY, B. J. 1995: The origin of heavy metals in soils. In Alloway, B.J. (Ed.), Heavy Metals inSoils. Blackie Academic and Professional, London, UK, pp. 38-57.311 | P age