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Register a new userRemoving of Heavy Metals from Sewage Water Using Chitosan Extracted from Crustacean Waste
إزالة بعض المعادن الثقيلة من مياه الصرف الصحي باستعمال الكيتوسان المستخلَص من مخلّفات القشريّات
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المجلة السورية للبحوث الزراعية ورقة بحثية
Publication date
2018
fields
Food Sciences
and research's language is
العربية
Created by
Shamra Editor
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تمّ دراسة الدّور الحيوي لمركّب الكيتوسان، و المحضّر بالطريقة الكيميائيّة من قشور الروبيان نوع Penaeus semisulcatus و الهيكل الخارجي للسرطان البحري Portunus pelagicus في بعض التطبيقات الزراعيّة و الصناعيّة، حيث استخدم بتركيز 1% (وزن:حجم) و على أس هيدروجيني (4 و 8) لمدة 12 ساعة، في ترسيب و مسك المعادن الثقيلة (الرصاص، و الزنك، و الحديد، و النحاس و الكادميوم)، لمخلّفات مياه الصرف الصحي. تمّ تقدير تركيز المعادن بواسطة جهاز مطياف الامتصاص الذري Flame Atomic Absorption Spectrophotometer. أظهرت نتائج الدّراسة بأنّ أعلى تركيز للعناصر المعدنيّة للمياه كانت قبل المعاملة بمركّب الكيتوسان، حيث أظهرت حصول انخفاضٍ واضحٍ في تركيز المعادن كنسبة مئوية بعد معاملتها بالكيتوسان، إذ امتلك كيتوسان السرطان البحري إمكانيّة عالية في خلب العناصر المعدنيّة مقارنةً بكيتوسان قشور الروبيان، و قد بيّنت النتائج أنّ أعلى نسب مئوية لخلب العناصر المعدنية كانت عند الأس الهيدروجيني 4 مقارنةً مع 8 و قد أثبتت نتائج الدّراسة إمكانيّة الكيتوسان العالية في خلب و ترسيب الأيونات المعدنية من المياه الملوّثة.
The biological role of chitosan which was prepared by chemical method from shrimp waste Penaeus semisulcatus and the outer skeleton for marine crab Portunus pelagicus in some industrial and agricultural applications were studied. The concentration of prepared chitosan was 1% (w/v) at pH (4 and 8) for 12 hours in precipitation and chelating heavy metals (Lead, Zinc, Iron, Cupper and Cadmium) from of sewage water. Concentration of elements was measured by Flame Atomic Absorption Spectrophotometer ) FAAS). The results of the study indicated that the concentration of the water elements was high before treated with chitosan. The results showed a significant (p<0.05) decrease in element concentration percentage after treated with crab chitosan. In contrast, shrimp chitosan displayed a minimum effect on decreasing the amount of heavy metals. Moreover, the results showed that the higher percentage for mineral adsorption was at pH (4 as compared with 8). The results confirmed the possibility of using chitosan in chelate and precipitate the mineral ions from polluted water.
References used
Abatneh, Y.; and O. Sahu (2014). Removal of chromium by biosorption method (Chitosan). International Letters of Natural Sciences. 8:44 – 55
Ahmed, R.A. and A.M Fekry (2013). Preparation and characterization of a nanoparticles modified chitosan sensor and its application for the determination of heavy metals from different aqueous media. Int. J. Electrochem. Sci., 8 (1) : 6692 – 6708
Bamgbose, J.T.; S. Adewuyi; O. Bamgbose; and A.A. Adetoye (2010). Adsorption kinetics of cadmium and lead by chitosan. African Journal of Biotechnology. 9 (17): 2560 – 2565
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kinetics of heavy metals removal from the single component solutions of Vanadium, Nikle,
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d height.
The effect of competing cations was also studied to establish the effectiveness of natural
zeolite in treating Industrial wastewater under continuous conditions using fixed bed
columns. The metal loaded natural zeolite was regenerated using NaCl . The results from
column studies showed that the Slower flow rates gave better removal efficiencies
compared to faster ones, Longer bed heights also resulted in greater adsorption
efficiencies. The bed depth service time (BDST) model was successfully used to simulate
experimental results at 30 % breakthrough. This model provides the necessary parameters
needed for fixed bed column design, the factor R2 ranged between 0.91 – 0.95. Natural
zeolite was exposed to 3 cycles of adsorption and desorption. The efficiency of the column
in removing heavy metals was high, The results indicate that natural zeolite can be
regenerated and re-used in removing heavy metals from solution.
This study aims to determine the concentrations of some heavy metals that are present in the crude oil and in liquid waste of the crude oil desalting unit .The extraction method (liquid-solid) is used for concentrating and extraction these compounds
from the
saltwater samples .Samples were collected from the unit’s discharging points and from the subsequent treatment stages .A suitable analytical method was used to extract these metals
from both of crude oil and the oil refineries᾿ liquid wastes.
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This study deals with identifying some heavy metals (Pb,Zn,Ni) concentration in the recycledsewage in Latakia Countryside which is resulting from three treatment plants distributed over (Hebbeit, Al-Harah, MarjMoairban),2011.This research uses the El
ectro Thermal Atomization-Atomic Absorption Spectrometry (ETA-AAS) technique in determining of heavy metal elements mentioned above. This research shows a higher concentration of Zn-element (2.798 mg/L) in all treatment plants and in all seasons compared with the concentration of other elements, while Ni and Pb have recorded low concentrations (0.351, 0.243) mg/ℓ, respectively. The statistical study has demonstrated that there is a correlation varying from positive high to positive low, and sometimes to negative highs and lows, this gives clear indications for resources of pollution.
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) %
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propose the most appropriate economic solution in the case of study.
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The results suggested that substitution of synthetic oil sorbents used in Syria by marine algae is possible in oil removal, which have relatively high sorption capacity.
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