Mathematical Modeling for the Absorption Capacity of Heavy Metals from the Soil in the Case of Phragmites Australis Plant Species

Abstract

This paper proposes a tridimensional mathematical model of the absorption capacity of heavy metals (cadmium and nickel) from the soil in the case of Phragmites Australis plant species (the soil and plant samples was taken from six locations/areas along the Bistri�a and Crac�u Rivers, belonging to the Siret hydrographic basin). The variable measures taken into consideration when carrying out the experiments and realizing the mathematical model are the distance from the water-soil interface from which the plant samples were taken and the concentration of the heavy metals in the soil. The mathematical model was elaborated and tested by means of the TableCurve 3D program used for generating linear and non-linear equations. A very high absorption capacity of cadmium from the soil was recorded A very high absorption capacity of cadmium from the soil was recorded, in the case of Phragmites Australis plant species (190�234 % higher than in the soil). The correlation coefficient of the mathematic model was between 0.90 and 0.98.

Mathematical Modeling for the Accumulation of Cadmium, Zinc and Arsenic from the Soil in the Case of Bulrush Plant Type

“…Points taken into consideration for prelevation specimens along the Bistrita River, the Siret hydrographic basin [3] of soil and plants are presented in figure 1. Sediments were sampled from two points along the Bistrita River, belonging to the Siret hydrographic basin (downstream of Batca Doamnei lake -upstream of Piatra Neamt city and Dumbrava Rosie -downstream of Piatra Neamt city) [3,19,28].…”

Influence of Fertilizers on Soils Used for Oleaginous Crop

“…According to the data presented in the Code of good agricultural practices, 36.5 kg of nitrogen, 17.5 kg of phosphorus and 50 kg of potassium, active substances are required to produce a ton of oleaginous crop seeds and strains [3,4,24,[25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Utilization of Ozone and Composite Materials in the Seed Treatment to Stimulate the Germination and Growth of Agricultural Crops

“…One of the prospects for the development of effective agriculture, it is deemed the programed action to certain physico-chemical factors on the environment for the growth of crops at different stages of development, in order to change the state of energy in order to stimulate the process of germination of seeds and growth of plants, increase their resistance to the influence of the external factors and the increase in their productivity [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Lately, an alternative in agriculture to stimulate the processes of agricultural development and harvesting of pure organic products is the use of physico-chemical methods.…”