studied the elimination of lead using natural zeolite by studding the the best
conditions to removal lead in a system with two phase: liquid (contaminated water with
lead)-solid (natural zeolite), correlation of the following factors: time of mixin
g phase,
granular size of solid phase, change of pH values, concentration of the calcium element as
a competitor element for the available sites for occupation on the solid phase, the ratio V/m
represents the size of the aqueous phase to the mass of the solid phase and concentration of
lead element.
On the other hand, the possibility of using natural zeolite as a template for storaging
dangerous materials such as lead, has been studied by changing water quality, pH and
temperature.
The results of this research show that and under the following experimental
conditions: time of mixing=4hour, mix of granular size of solid phase, pH< 8,
concentration of calcium = 20 ppm,V/m=100 and concentration of lead = 1000 ppm , the
rate of lead removal range from 60% to 99%.
On the other hand, the results of this research show that changing water quality has
no impact on the ability of natural zeolite for storaging lead as a hazardous waste, while
pH changes have minor effects on this ability of retention and an effect for the high
temperatures on the template was also observed.
the residual lead effect in cows milk was
studied in the Governant of Tartous. For this end,135 dairy cows in
different milking seasons and from three different farm stationes
(Zahed cow station,Cement factory farm station and Banias refinery
cow
station) were used.
The objective of the study was to accurately determine lead
concectrations in cows milk in the three different farms. Samples of
milk,soil,water and feedstuff were collected and lead concentration
was determined then statistically analyzed.
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 Ju
ly 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.
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.
