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Seasonal distribution of some heavy metals in the sedimentary column and pore-water extracted from the estuary of Al-Kabeeralshemali river

دراسة التوزع الفصلي لبعض العناصر المعدنية الثقيلة في العمود الرسوبي و المياه المسامية في نهر الكبير الشمالي

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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In this study the concentration of (Cu, Cr, Cd, Fe, Mn, Ni, Zn , Pb ,V &Co) in some sedimentary columns and pore-water extracted from the estuary of Al-Kabeer alshemali river was determined during four seasons .the concentrations of these metals were determined using atomic absorption spectroscopy (AAS). The columns were cut into slices with 2cm of thickness ,the pore water at every slice was extracted using centrifugation (7000 r/min).the results showed that the concentration increased from surface(deep=0cm, rich of O2) up to the 4cm of deep ,then the concentration decreased in deeper slices (down of 4cm,deficiency of O2) and the concentration of Fe and Mn from high ranking ppm. The rest of the items were relatively lower ranking ppb, but Co, Cd and V were low. meat increased the concentration of all these elements in the spring and summer, compared with the values in the winter and autumn, due to increasing human activities on the one hand and the high temperature on the other hand, leading to increased activities of bacterial that leads to the decomposition of organic material that may increase the ratios of these elements in the pore water.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة توزيع بعض العناصر المعدنية الثقيلة في العمود الرسوبي والمياه المسامية في مصب نهر الكبير الشمالي خلال الفصول الأربعة. تم استخدام جهاز مطيافية الامتصاص الذري (AAS) لتحديد تركيز العناصر المعدنية مثل النحاس، الكروم، الكادميوم، الحديد، المنغنيز، النيكل، الزنك، الرصاص، الفاناديوم والكوبالت. تم تقطيع الأعمدة الرسوبية إلى شرائح بسماكة 2 سم واستخراج المياه المسامية باستخدام الطرد المركزي. أظهرت النتائج أن تركيز العناصر المعدنية يزداد من الطبقة السطحية حتى عمق 4 سم ثم ينخفض في الشرائح الأعمق. كان تركيز الحديد والمنغنيز مرتفعاً، بينما كانت تركيزات الكوبالت والكادميوم والفاناديوم منخفضة. لوحظ ازدياد تركيز جميع العناصر في فصلي الربيع والصيف مقارنة بالشتاء والخريف، بسبب الأنشطة البشرية وارتفاع درجات الحرارة التي تزيد من الأنشطة البكتيرية وتحلل المواد العضوية. تلعب مصبات الأنهار دوراً هاماً في حجز الملوثات المعدنية ومنع وصولها إلى البيئة البحرية، مما يساهم في تقليل التلوث البحري.
Critical review
تعد الدراسة شاملة ومفصلة في تحليل توزيع العناصر المعدنية الثقيلة في العمود الرسوبي والمياه المسامية. ومع ذلك، يمكن تحسين الدراسة من خلال تضمين المزيد من البيانات حول تأثير الأنشطة البشرية المحددة على تركيز العناصر المعدنية. كما يمكن تعزيز الدراسة بإجراء مقارنات مع مناطق أخرى مشابهة لتقديم رؤية أوسع حول تأثير العوامل البيئية المختلفة. من الجيد أيضاً تضمين توصيات محددة للحد من التلوث وتحسين جودة المياه في المنطقة المدروسة.
Questions related to the research
  1. ما هي العناصر المعدنية التي تم دراستها في هذه الدراسة؟

    تم دراسة تركيز النحاس، الكروم، الكادميوم، الحديد، المنغنيز، النيكل، الزنك، الرصاص، الفاناديوم والكوبالت.

  2. ما هي التقنية المستخدمة لتحديد تركيز العناصر المعدنية؟

    تم استخدام جهاز مطيافية الامتصاص الذري (AAS) لتحديد تركيز العناصر المعدنية.

  3. كيف يتغير تركيز العناصر المعدنية مع العمق في العمود الرسوبي؟

    يزداد تركيز العناصر المعدنية من الطبقة السطحية حتى عمق 4 سم ثم ينخفض في الشرائح الأعمق.

  4. ما هو تأثير الأنشطة البشرية وارتفاع درجات الحرارة على تركيز العناصر المعدنية؟

    تؤدي الأنشطة البشرية وارتفاع درجات الحرارة إلى زيادة الأنشطة البكتيرية وتحلل المواد العضوية، مما يزيد من تركيز العناصر المعدنية في المياه المسامية.


References used
BARTON, J.AND SHERWOOD, J. Estuary opening management in Western Victoria: An information analysis. Parks Victoria Technical Series, Melbourne. No. 15, 2004, 111
DUPONT, J.P.; LAFITE,R.;HUAULT,F.M.;HOMMERIL,P.AND MEYER,R . Continental /marine ratio changes in suspended and settled matter across a macrotidalestuary(the Seine estuary ,north western France).International journal Marine Geology.Geochemistry and Geophysics,France.120,1994,27-40
MORRIS, A, W; ALLEN, J,I; HOWLAND, R, M AND WOOD, R, G. The estuary plume zone: source or sink for land-derived nutrient discharge. Estuarine Costal and Shelf Science.40,1955, 387-402
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