This paper presents a study of the possibility of modifying the surface of
Syrian zeolite samples from anionic to cationic form using cationic surfactant
Hexadecyltrimethylammonium bromide (HDTMA-Br), in order to use the
modified zeolite in remova
l of anionic contaminants from polluted solutions.
Samples were obtained from Tel Mekhalat area and exploratory well No. 21 at
different depths.
Pollution by heavy metals, due to their toxic nature and other adverse
effects, is one of the most serious environmental problems. Many heavy metal
ions, such as mercuric ions are detected in industrial wastewaters originating
from metal plating,
mining activities, paint manufacture, etc. This ion isn’t
biodegradable and tends to accumulate in living organisms, causing various
diseases and disorders. Therefore, it should be removed from aqueous solution
before discharge.
Studied the distribution coefficient of elemental copper and lead contaminants in the aqueous phase using a Bi-phase system: solid phase (the sands of Palmyra) and liquid phase (water containing the former two elements), where they were sampling sand
samples from different regions in Palmyra to investigate for possible use as an adsorbent for elemental copper the lead from contaminated water, and after adjustment for certain transactions from time mixing phases, granular size, concentration of hydrogen ions, the concentration of the contaminated ingredient, the concentration of rival element (calcium) in addition to the ratio v / m in order to get the best rate for removal of these elements. The removal rate of copper componentamounted to 99.9% using four sites samples of sand a Palmyra, (al qareaten - the third leg to pump crude oil T3 - Alhl field - the valley between Mount aldahek and Sokhna) For lead removal ratio stood at 76.35% for the qareaten and 87.75% of the station the third to pump crude oil and 95 0.0% of the field Alhl and 96.25% of the valley between Mount aldahek and Sukhna. The application of the conditions that we have obtained in the laboratory to industrial water samples from the water income for the unity of treatment in Banias refinery and Water Company Drinaj of the Syrian Company for Oil Transport and the ratio of the removal of lead in the four samples ranging from ( 97.79 - 100)% for water Banias Refinery Company ranged between (83.89 - 88.08)% for water Syrian Company for Oil Transport, while the percentage of removal of the copper in the four samples ranging from (96.52 - 99.37)% for water Banias refinery Company and ranged ratio remove copper from the Syrian Company for Oil Transport water between (82.66 - 96.28)% in four samples.
This research aims to study the effectiveness of each(ferric chloride , ash and coffee
dregs) to remove phosphorus from Lattakia Port Laboratories' waste water which is
assembled in a separate sewage pit by doing laboratory experiments on water con
taining
high concentrations of phosphorus, whether real wastewater or standard solutions of
phosphorus oxide. Where it has been experimenting with ferric chloride at doses as weight
average(FeCl3/P = (0-5)) to give effectiveness ratios(70- 80)% with determining the value
of the pH-compliant and it was noted re-releasing of phosphorus time after(10-12) hours of
the start of precipitation, beside that it has been experimenting with ash as adsorpted agent
at doses as weight average(Ash/P = (2-4.5)) to give effectiveness ratio which it had
reached to 98% where it was noted re-releasing of phosphorus after 11 hours with
determining the pH values of approval for that, As coffee dregs when added in
doses)Coffee dreg/P = 3-10) as weight average, it fulfilled proportion removal(40 - 99) %
and phosphorus re-released after 24 hours. The outcome of these experiments was to
propose the most appropriate economic solution in the case of study.
حضر المبادل الكاتيوني بلا ماء حمض المالئيك - أستات الفينيل MA-VAH غير الذواب في الماء
بمعالجة المحلول المائي MA-VA بعامل التشابك ٤،١ فينيلين ثنائي الأمين . للمبادل و لقد حددت البنية
الكيميائية لهذا المبادل الأيوني باستخدام المعايرة الحمضية الأساسية و التحليل العنصري.
The adsorption ability of those pollutants by the Anion exchanger
( A36MB ) have been studied. A good results have been obtained
after( 8 hour ) as a real time of this operation . The removal ratio
reach up to( 96.62%) , when the quantity of the s
olid ( Anion
exchanger) was about 10 gr and the wastewater about 150 gr
where the ratio of( sold/water) was about 6.666 % .
In this work, the study of
the process had done in reducing the percentage of sulfur and
aromatics in by effective adsorption using active carbon. Where the
study showed the effect of weight change in the proportion of coal
to fuel oil processor weight, the percentage of sulfur and aromatics
removal in terms of changing the stirring time (mix).
Three samples of alumina_zirconia mixed oxid AL2O3_Zr2O4(1;0.25;0.1) mole ratio
based on oxides were prepared by sol-gel precipition method. The system AL2O3_Zr2O4
was obtained by mixing tow gel of alumina and zirconia precipited from aqueous solut
ions
of alumina nitrate and zirconium chlorid using ammonium hydroxide solution as precipited
agent. The system after mixing was allwed to settle for 24 h. The resuling precipitate was
filtered off and washed several times with deionized water and dried at 120°C for 24 h.
The powdered oven-dried hydrous alumina_zirconia was immersed in ammonium sulfate
solution(1) M for 24 h to incorporate sulfate ions. The resulting sample was dried at 120°
C for 24 h, calcined at 550°C for 6 h. The textural properties were determined by terating
of adsorption data of N2 at 77 K, and the results showed the changings in the textural
properties.The TG_DTA analysis showed the thermal stable of the samples in a long rang
of temperature. FTIR spectra showed that the sulfate ions were incorperated in the saples.
The study investigated the possibility of removing heavy metal ions (Cd, Pb) from
aqueous solutions using adsorption method on the citrus peel (orange), which is a solid
waste available in abundance especially in the Syrian coast as well as easy to
use at low
cost. The optimal conditions for the simultaneous adsorption of the ions (Cd 2+, Pb 2+) on
the surface of orange peel (dry, soft) were determined.The concetration of ions was
determined using (DPASV) method Which is characterized by Sensitivity and high
accurawcy. The results showed that the optimum adsorption conditions were at pH = 5 ,
equleibrium time = 60 min, and the initial concentration is ( C0 = 50-200) ppm,The
application of the Langmuir and Frienlish models showed that Frienlish model is best fited
for expressing the adsorption of Pb ions on the surface of dry and soft orange peel and for
expressing the adsorption of Cd ions on the surface of soft orange peel , Langmuir model
is best fited for expressing the adsorption of Cd ions on the surface of dry orange peel.
The method applied its selected terms to realistic samples of processed and industrial
waste water, which showed a unique response as a purification method for the water
media.
