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Register a new userIdentify the concentration of some heavy metal elementsin different types of marine sediments dispersed on Latakia and Banias coast
تحديد تراكيز عنصري الرصاص والكادميوم في الرسوبيات البحرية الحديثة لشاطئ مدينة طرطوس
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Tishreen University مقالة
Publication date
2022
fields
marine Chemistry
and research's language is
العربية
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Shamra Editor
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ركز هذا البحث على تحديد تحديد تراكيز كل من الكادميوم(Cd) و الرصاص (Pb) في الرسوبيات البحرية الحديثة لشاطىء مدينة طرطوس باستخدام جهاز الامتصاص الذري (Atomic Absorption Spectrophotometer: AAS) . لوحظ وجود ارتباط هام بين تغير تراكيز العناصر المعدنية المدروسة (Cd and Pb) ونوعية الرسوبيات وكمية المادة العضوية من جهة، وباختلاف نوعية ومصادر التلوث من جهة أخرى.
This research focuses on identifying the concentration of some heavy metal elements (Lead (Pb) cadmium (Cd)) in different types of marine sediments dispersed along Tratous coastal area using the Atomic Absorption (Atomic Absorption Spectrophotometer: AAS). The samples were collected from regions differ from each other in terms of geographical location and nature of the pollutants.
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This research based on the determination of some traceheavy metals(Lead (Pb), cadmium (Cd)), in different types of recent marine sediments and studying their grained isolation along different zones of Latakia and Baniyas shore area
during summer period of 2022 using (Atomic Absorption Spectrometry: AAS).
This study aimed to study the accumulative abilities Ricnius Communis & Phragmites Communis for lead and cadmium. This plants are native near the RMAILAH river in JABLAH city.
The plants samples were collected from leafs, wood, and bark for plant sp
ecies, the soil samples were taken at (0-20)cm depth. Concentration of heavy metals were determined in soils and plants with "Atomic Absorption Spectrophotometer"
Our results showed that the amounts of pb in the soil samples were 61.89ppm. The concentrations of lead pb in the parts of Ricnius Communis range between 4.3 to 5.81ppm; in the parts of Phragmites Communis range between 1.46 to 2.32ppm. According to statistics analysis Ricnius leaves surpass Ricnius wood and bark with accumulate lead; and Ricnius surpass Phragmites with accumulate lead too.
Our results showed that the amounts of cd in the soil samples were 3.081ppm. The concentrations of Cd in the parts of Ricnius Communis range between 0.031 to 0.061ppm; in the parts of Phragmites Communis range between 0.031-0.055ppm. According to statistics analysis there is no moral differences between Ricnius and Phragmites with accumulate cadmium.
The importance of research being deals with the problem of
significant environmental concern the pollution of the plant , soil
and air component lead as a result of rapid industrial development
since the twentieth century . Was selected Eucalyptus
for several
considerations , including the widening spread and being one of
the bumpers wind that might ease the arrival of pollutants in the
atmosphere to regions far geographically . was selected several
sites of Homs in order to examine the content of the soil and
leaves Eucalyptus from a bullet was found that the concentration
of lead element in the plant was caused by air pollution , where not
shown the existence of relations clear engagement between the
content of soils of lead ( for a total and disposable absorption )
with the lead content of the plant . Ranged concentration of lead
overall in the soil between 1.98 ppm ( through Homs - peaceful )
and 72.47 ppm ( Highway Tartus in the south ) , and the average
of 4.857 ppm, did not exceed the concentration of lead in the
samples studied , both inside the city or outside the normal limit
and values lead stainless absorption in the soil ranged from ppm
(19.02- 0.02), ranged lead concentration in the plant between
2.01ppm and 10.35ppm and this concentration of lead element
within the permissible limits but with time become toxic showing a
lack of liaison relationships between the component lead either in
the soil or plant with the CaCO3 and Active lime. Finally we can
say that the contamination of the plant within the city is higher than elsewhere because of the busy traffic . Add to that the increase in soil lead content available led to increase the concentration of lead in Eucalyptus,leaves
This research study the effect of the most important conditions on the voltammetric curves of lead and copper to reach the optimal conditions for the simultaneous determination of these elements by Differential pulse anodic stripping voltammetry (DPA
SV) using a hanging mercury drop electrode (HMDE) as a working electrode.
The results showed that the optimal conditions for the simultaneous determination of lead and copper by using nitric acids electrolyte 3M,were when applying scanning field from -700 mV to +150 mV, accumulation potential -800 mV, the time of the accumulation 80 sec, speed rate 40 mV/sec, and the amplitude pulse 70mV,
where the peak currents were IP (Pb) = 274.2 nA, IP (Cu) = 630.5 nA, at peak potentials EP (Pb) = -380 mV, EP (Cu) = +40 mV, by applying the previous conditions, the limits of detection reached 1.05μg/l for lead 2.45 μg/l for copper. The retrieval coefficient calculated to make sure accuracy of the method and it reached 103.90% and copper 101.70% and to indicate the precision of the way by the standard deviation was the value of the standard deviation for lead 0.027 mg/l, and copper 0.013 mg/l. the method applied under its own conditions by examined on some of environmental and samples and showed success and high efficiency
This research studying the effect of the most important analytical and technical conditions on the voltammetric curves of lead and cadmium in order to choose the optimal conditions for the simultaneous determination of these two elements by Different
ial pulse anodic stripping voltammetry (DPASV) using Graphite mercury film electrode(GMFE) as a working electrode. The results showed that the optimum analytical conditions were when using Sodium acetate - acetic acid (0.05M) electrolyte, where pH= 4.6, and a concentration (25mg/l) of Hg2+, CCd:CPb ratio up to 1:10 and conversely, and the optimum technical conditions were when applying scanning field from -1200 to -100mV, accumulation potential Eacc= -1200mV, accumulation time tacc= 120sec, speed rate υ= 120mV/sec, and amplitude pulse ΔE= 50mV. The previous conditions gave ideal voltammetric curves, Ip(Cd)= 6.134µA, Ip(Pb)= 4.966µA, Ep(Cd) = -647 mV, Ep(Pb)= -473 mV. The previous conditions were applied on a standard sample and the limit of detection was (Cd) 0.100µg/l, (Pb) 1.000µg/l, retrieval coefficient R%(Cd)= 100.5%, R%(Pb)= 97.2%, standard deviation SD(Cd)= 0.020mg/l, SD(Pb)= 0.021mg/l; Therefore, that shows the accuracy and precision of the method. The validity of the method under its new conditions was examined on a number of environmental samples and showed success and high efficiency.
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