31 research outputs found
BIOSORPTION OF Cd(II) IONS BY NORDMANN FIR CONES
The biosorption of Cd(II) ions from aqueous solution was investigated by
using Nordmann fir (Abies nordmanniana (Stev.) Spach. subsp.
nordmanniana) cones, a natural biosorbent, in a batch biosorption system
as a function of pH (1.5-7.0), initial metal concentration (5-150 mg/L),
biomass dosage (1.0-8.0 g/L), contact time (0-480 min) and temperatures
(15-45 degrees C). The experimental data showed that the maximum pH for
efficient biosorption of Cd (II) was 6.5. The percentage removal
increased from 76\% to 84\% with an increase in temperature from 15 to
45 degrees C at an initial Cd(II) concentration of 5 mg/L. The data were
analysed on the basis of pseudo-second-order kinetics, Elovich equation
and intra-particle diffusion mechanism to determine the best fit model
for Cd(II) biosorption onto Nordmann fir cones. The pseudo-second-order
kinetic model and Elovich equation provided the best correlation of the
experimental data studied in comparison to the intra-particle diffusion
mechanism. The experimental data were analysed using by Freundlich and
Langmuir equation. The activation energy of biosorption (Ea) was
calculated with Arhenius equation. Using the thermodynamic equilibrium
coefficients obtained at different temperatures, the thermodynamic
constants of biosorption (Delta G degrees, Delta H degrees and Delta S
degrees) were also evaluated
The effects of dusts of bartin cement factory on Taurus Cedar (Cedrus libani A. Rich.) seeds' germination
The present study effects of pollutant particles from Bartm Cement
Factory on development of seeds and leaves of Taurus Cedar (Cedrus
libani Rich.) which in plantation area around the factory were examined.
For this purpose, seeds were collected from sampling trees located 200m,
400m, 600m, 800m and 1000m (control) and zermination percentage of
seeds, and total chlorophyll content of seedlings were determined.
Moreover, in the present study, the air movement around Bartin Cement
Factory and level of pollutants in sampling areas were also determined.
The directions of the prevailing winds around the cement factory were
North, and Northwest. From the aspect of pollutant material level, the
array of sampling areas was SP1>SP2>SP3>SP4>C. On the other hand,
evaluating the results of mean seed germination percentages, a
significant difference (P<0.01) was noted between control and seeds of
Taurus Cedar at various distances from are pollutant source. From the
aspect of the power of seeds collected with 3 repetitions from Taurus
Cedars located at various distances, it a significant difference
(P<0.01) was found between the control and experimental groups.
Accordingly, from both the aspects of mean germination percentage and
seed power, an apparent increase was observed from 400 m distance. On
the other hand, as the distance from cement factory increased, total
chlorophyll content in Taurus Cedar seedlings increases significantly.
Results of bilateral regression analysis evaluated exponential
relationship at level 97\% between these 2 variables
EFFECTS OF INDUSTRIAL WASTEWATER ON GERMINATION AND SOME PHYSIOLOGICAL PROPERTIES OF DORMAST OAK (QUERCUS PETRAEA LIEBL.) SEEDS
In this study, where the effects of various concentrations of unfiltered
wastewaters released from a textile factory located in the organized
industrial zone of Bartin on mean germination percentages, seed power,
and total chlorophyll content of seedlings have been evaluated, the
dormast oak (Quercus petraea Liebl.) which is widely used in our country
in artificial regeneration, rehabilitation and foresting activities has
been chosen. When the results related with mean seed germination
percentage have been evaluated, it has been determined that there is a
statistically significant (p<0.01) difference between control and
wastewater implemented dormast oak seeds in terms of germination
percentage, and that 3 different groups have emerged. Accordingly, the
germination percentage of seeds has shown significant decrease after
concentration of 40\%. Accordingly, while the dormast oak seeds in
control group and 20\% wastewater treatment group take place in the 1st
group, the 2nd group consists of experiment populations treated with
40\% and 60\% of wastewater concentrations where the seed power started
to decrease significantly, and the seed groups treated with 80\% and
100\% of wastewater concentrations where the seed power is
lowest-clustered in 3rd group. As in germination percentage, the most
important decrease in seed power starts from treatment with 40\% of
wastewater concentration. On the other hand, it has been found that the
power starts to increase since the 8th day in almost all of the groups.
Also, there is a strong relationship with value of 92\% between the
total chlorophyll content found in fresh dormast oak seedlings and
industrial wastewater concentration (R-2 = 0.9216)