MATERIAL AND METHODS The sampling g

MATERIAL AND METHODS The sampling grid of soil profiles was irregular, having in view a higher number of soil profiles per hectare near pollution source up to 4-5 profiles ha i. Soil types, land uses, and degree of soil and vegetation degradation were also taken into account. Soil samples were collected mainly on genetic horizons from 115 agricultural and forest soil profiles located in the area affected by the emissions of the above mentioned sources. Each soil profile was characterized by soil texture and basic chemical properties(pH, exchange capacity. content of humus, nitrogen, CaCO3, mobile phosphorus and potassium, exchangeable hydrogen). Heavy metal(Cd, Cu, Cr, Co, Fe, Mn, Ni, Pb, and Zn) contents were also measured, by atomic absorption spectrometry procedure. On the basis of analytical data, the values of some indexes were computed, such as soil buffering capacity(Borlan, 1955) loading/pollution index(Lacatusu, 1998) which, together with the proper analytical data, permitted to asses the degree of soil deterioration in the Zlatna area influenced by both the acid rains and heavy metal pollution

RESULTS AND DISCUSSIONS Soil vulnerability to pollution by acid rains and heavy metals The polluted area is covered by various soils. Dystric and Eutric Cambi sols are predominant(83.74%). In addition there are Haplic and Vertic-Haplic Luvisols, Eutric Fluvisols, and Eutric Regosols(Table 1) The vuinerability assessment of these soils, taking into account the values of the soil buffering capacity index, within the considered area, shows that soils. with high vulnerability to the polluting impact represent 68%, while soils with moderate vulnerability represent 22% and soils with low vulnerability represent only 10% (Fig. 1). The ranking of soils according to the natural vulnerability to the impact of acid rains accompanied by heavy metals is presented in Table 2. The conclusion is that the nature of soils is largely prone to some increased effects of soil chemical and physical degradation

ผลลัพธ์ (อังกฤษ) 2:

MATERIAL AND METHODS The sampling grid of soil profiles was irregular, having in view a higher number of soil profiles per hectare near pollution source up to 4-5 profiles ha i. Soil types, land uses, and degree of soil and vegetation degradation were also taken into account. Soil samples were collected mainly on genetic horizons from 115 agricultural and forest soil profiles located in the area affected by the emissions of the above mentioned sources. Each soil profile was characterized by soil texture and basic chemical properties (pH, exchange capacity. Content of humus, nitrogen, CaCO3, mobile phosphorus and potassium, exchangeable hydrogen). Heavy metal (Cd, Cu, Cr, Co, Fe, Mn, Ni, Pb, and Zn) contents were also measured, by atomic absorption spectrometry procedure. On the basis of analytical data, the values ​​of some indexes were computed, such as soil buffering capacity (Borlan, 1955) loading / pollution index (Lacatusu, 1998) which, together with the proper analytical data, permitted to asses the degree of soil. deterioration in the Zlatna Area influenced by both the acid rains and Heavy Metal Pollution RESULTS aND discussions Vulnerability to Soil Heavy Metals Pollution by acid rains and Area is covered by Various The polluted soils. Dystric and Eutric Cambi sols are predominant (83.74%). In addition there are Haplic and Vertic-Haplic Luvisols, Eutric Fluvisols, and Eutric Regosols (Table 1) The vuinerability assessment of these soils, taking into account the values ​​of the soil buffering capacity index, within the considered area, shows that soils. with high vulnerability to the polluting impact represent 68%, while soils with moderate vulnerability represent 22% and soils with low vulnerability represent only 10% (Fig. 1). The ranking of soils according to the natural vulnerability to the impact of acid rains accompanied by heavy metals is presented in Table 2. The conclusion is that the nature of soils is largely prone to some increased effects of soil chemical and physical degradation.