In This study it has been uses a network for monitoring the pollution with organochlorine pesticides in There marine stations at Lattakia coast: Fishing port, AfamiaCoast, High Institute Of Marine Research Coastusing Cages contained species of musse
lswitch are filter feeders Brachidontes varibilis. Samples had been collected from Lattakia coast.
The results showed a great efficiency of the made network for monitoring the organic pollution in marine environment. It has been recorded a concentration of DDTs is accumulated lower than 2ng/g , Endosulfane and HCB is lower than 1 ng/g too. The results showed that the HCH compounds is dominant in all stations.organochlorine pesticides is accumulated mostly in the biota of station Fishing port, Afamia Coast
The objective of the present work is to determine the operating conditions of an activated carbon filter, based on the characteristics of breakthrough curves. In order to properly design and operate fixed-bed adsorption processes, we apply the concep
t of the mass transfer zone (MTZ) that helps to obtain the evolutions of the operating parameters of the fixed-bed. Phenol solutions were prepared in three initial concentrations of phenol (20, 40, 60 ppm). The experimental data were analyzed by calculating fractional capacity (F), the height of (MTZ) (HZ), the number of unit transfer equivalent (NZ), the amount of phenol eliminated by the bed of activated carbon at the breakthrough (ABP).
The aim of this study isto determinat the concentration of (Pb, Cu, Cd, Co, Cr , NiZn,
Fe) in storm water and their content of sediments during four seasons, the samples were
collected in four areas along Tartous beach. After make necessary treatme
nt concentrations
of elements determination by flame atomic absorption spectrometry.The results showed a
high levels of elements iron and zinc, in stormwater (138.6 μg/l - 99.7 μg/l) and sediments
(17.863 μg/l – 138.735 ppm), in all samples and there were concentrations another
elements difference between stations and rainfalls related to the human activities.
This study deals with spatial and temporal distributions of organic and inorganic
phosphorus in sedimentary columns from Al-Kabir Al-Shimaliand Al-Hussain estuaries,
during the period March 2013- February 2014.
Organic phosphorus concentrations ra
nged between (2.0 - 207.6) μg/gin sediments
from Al-Kabir Al-Shimali estuary, and from (1.7 –130.9) μg/gin sediments from
Al-Hussainestuary. Sediment content from inorganic phosphorus ranged between
(12.4 – 371.2)μg / g at sediments from Al-Kabir Al-Shimali estuary, and from
(2.0 - 242.6)μg /g at Al-Hussain estuary. Granular composition of sediments did not play
a significant role in the temporal and spatial distributions of organic and inorganic
phosphorus.
In general, organic and inorganic phosphorus concentrations decreased gradually
from winter to summer, and from surface layers of the sedimentary column towards the
deeper layers.
The ratiobetween inorganic and organic phosphorus increasedfrom river into marine
sediments. In addition, this ratio increased gradually as the sedimentdepthincreased, and
was high in winter and low in summer.
The concentrations were determined of the most basic air pollutants
(SO2, H2S, CO, O3, NOx, TSP, PM10, PM2.5) in some vital areas in
the Tartous city of and its surroundings using a mobile unit to
measure air pollutants.
Half quarterly water samples were collected during the period between March 2015
and February 2016 of four different stations from Banias city water that is subject to the
effect of sewage and estuaries. The concentrations of nutrients (H3SiO4
-,
PO4
-3, NO3
-, NO2
-
, NH4
+ ) and the concentrations of chlorophyll a were determined to find out how affected
by the temporal and spatial variability. The highest concentrations of phosphate and
ammonia ions were observed at station St3 (close to the sewage), while the highest
concentrations of nitrate ions were registered at the stations St1 and St2 (estuaries). The
results showed high values of chlorophyll a in April (due to spring bloom of
phytoplankton) and October (autumn bloom). The ions ratio ΣN/P revealed that
phosphorus ions are limiting factor of the phytoplankton growth at St1 and St2, and that
nitrogen ions are limiting factor of growth at the stations St3 and St4. The ratio Si/ΣN
revealed that silicate ions are limiting factor of the growth of diatoms in all the stations.
The study, has Focused on determination of the most important hydrochemical
characteristics of water at AL-kabir alshemali estuary area by determination the
concentration of nutrient ions (nitrate, nitrite, ammonia, phosphates and silicates) and th
e
factors affecting them. Water samples were collected from several stations of that area
between March 2017 and January 2018.
The highest concentrations of nutrient throughout the year were reported at river estuary
point (K0), a depression in their concentrations was observed in the station distanced
away from the river estuary point, compatible with salinity gradient. River estuary point
(K0) formed the main source of nutrients that are distributed to other stations.
Nutrient concentrations showed clear gradual depression in winter down to more than
1,000 meters from the estuary point, while the gradient in summer has less extension, It
was within the first 50 meters in some monthes.
This research focuses on an environmental and economic aspect, as it depends on using the harmful water hyacinth weed as an effective material to product the biopolymer "polyhydroxybutyrate: PHB" by Bacillus subtilis. The samples were processed and d
igested to extract the polymer polyhydroxybutyrate (PHB) using chloroform method. Some tests were carried out to confirm the identity of this polymer, such as measuring the melting point of the product and studying the functional groups of the extracted PHB using the Fourier-transform infrared spectroscopy (FTIR). The results obtained by the extracted polymer from the water hyacinth weed showed conformity to the referential PHB polymer tests, which shows the importance of this research in determining a way to get rid of this harmful weed, which is an environmental problem and a large economic burden by investing it in the production of biopolymer PHB.
This study dealt with the determination of hydrogen sulfide concentrations in the sediments and water of sewage points on the beach of Lattakia city - the southern Corniche region, which witnesses a clear flow of sewage water and the effect of bacter
ia on the emission of hydrogen sulfide (H2S) of high toxicity to the water medium and from it to the air and seasonal changes. These emissions and the role of hydrological factors such as salinity, acidity and temperature in this process.
