Estimation of total and exchangeable form of Pb and Zn in agricultural land in the Banias area subjected to the impact of thermal station emissions

This study determined total quantity and exchangeable form concentration of zinc and lead in the agricultural soils in the Banias region. Soil samples collected from five sites from the north-east of the thermal station.

Study the possibility of applying the Freundlich and Langmuir equations for adsorption of Zinc and Copper on Zeolite

The experiment was carried out to study the ability of Cu and Zn adsorption on natural Zeolite using six concentration of Cu and Zn (50, 100, 150, 200, 250, 300) mg.L-1 and two different diameters of Zeolite particles (0.5mm-1mm). The research aimed to define the ability of Freundlich and Langmuir isotherms equations. specifically coefficient R2 was used to determine the suitability of these isotherms.

Biomonitoring Air Pollution Of Some Portable Heavy Metals in Dust Quarries By Using Needles Of Pinus brutia Ten, As Biomonitor In Site Of Kfardabeel Stand- Jableh

This study aimed to estimate the level of air pollution in some portable heavy metals in dust quarries by needles of Pinus brutia Ten. as biomonitor In site of Kfardabeel Stand- Jableh. The samples of dust and leaves were collected at the end of July in 2016, Atomic absorption spectrophotometer was used to determine the amounts of Lead, Zinc, Nickel (ppm, dry weight). The average of accumulated metals in the needles were estimated: (Pb= 45.57 ppm, Zn= 13.64 ppm, Ni= 7.64 ppm), while their amounts in the dust were done as following: (Pb= 66.1 ppm, Zn= 15.8 ppm, Ni= 19.6 ppm). The results showed that the studied site is polluted with Pb and Ni whereas Zn is in the natural range. a strong correlation between heavy metals amounts in the needles and their amounts in the trapped dust (r= 0.98) was detected, also regression equations have explained the variations in accumulation of studied metals in relation to the accumulated dust on needles as following: 40% Pb, 40% Zn, 20% Ni. Consequently results confirmed the possibility of detecting the atmospheric Pb, Zn, Ni pollution in the studied site using P. brutia Needles as a biomonitor.

The effect of Co0.6Zn0.4Fe2O4 ferrite slab loaded rectangular waveguide on microwave propagation

This research is based on experimental results of magnetization and magnetic susceptibility of ferrite slab prepared in a previous work with a computerized simulation to find the influence of ferrite slab on a microwave propagation in terms of determining the behavior of attenuation factor .A slab of ferrite Co0.6Zn0.4Fe2O4were prepared by classical ceramic method. We have studied an influence of slab of the CoZn-ferrite its thickness is , loaded in a rectangular waveguide on a propagation of microwaves. The values of the reverse and forward attenuation factor has been found. After that, we choose the location of the slab X0 inside the guide which means the optimum status of microwave propagation has been reached at .

" Effect of boron and zinc foliar fertilization on the yield and its components of faba bean (Vicia faba L).

the experiment was conducted under Syrian coastal conditions to investigate (Vicia fabaL.), the effect of boron and zinc foliar fertilization on faba bean,either individually or in combination, by increased rates (0, 0.25, 0.50, 0.75, and 1 kg boron / has boric acid, and zinc at a rate of 0, 0.375, 0.750, 1.125, and 1.5 kg / ha as zinc sulfate). where fababeans were plantedin plastic pots(15L) in )2013/11/10(and )2014/11/10(.The soil in pots has high content of calcium carbonate, low boron and zinc content, with pH slightly basic (representative of the region's soils). Half boron and zinc fertilizer rates were sprayed after 33 days of germination and the other half ,after 65 days of germination. The results showed significant responses in all studied parameters (number of branches,number of pods / plant, weight of 100 seeds, and seed yield (Kg. / ha) on faba bean plant, as a result of foliar fertilization by boron and zinc. Fababeans response to boron is higher than to zinc fertilization in all studied indicators. However,the treatmentB75Zn75(0.75 kg boric acid and 1.125kg of zinc sulfate) is the best, as compared to others. Also, the driedseeds yield was increased by about 17.66%.