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The Accumulative Capacity of Pinus brutia and Cupressus sempervirens to Lead (Pb) and Zinc (Zn)

المقدرة التراكمية عندالسرو دائم الاخضرار (Cupressus sempervirens) و الصنوبر البروتي (Pinus brutia) لعنصري الرصاص (Pb) و الزنك (Zn)

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 Publication date 2013
and research's language is العربية
 Created by Shamra Editor




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This study aims to investigate the abilities of two tree species (Pinus brutia and Cupressus sempervirens) planted in Banias Refinery Company to absorb and accumulate lead and zinc basically emitted by the Refinery. Samples of the planted species (leaves, bark, and wood) and soil from around the plants were collected and analyzed by atomic absorption spectrophotometer. The results did not show significant pollution with these two elements. Moreover, there were not any significant differences between the two species in terms of the accumulation of Pb and Zn. While the Pb concentrations ranged between (24.96-30.84 ppm) for P. brutia and (24.05-30.23 ppm) for C. sempervirens, the Zn concentrations ranged between (34.99-82.99 ppm) for P. brutia, (18.11-59.86 ppm) for C. sempervirens. It was also revealed that P. brutia bark accumulated Pb more than the other parts, whereas C. sempervirens leaves accumulated Zn more than the other parts.


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Research summary
هدفت هذه الدراسة إلى تقييم قدرة نوعين من الأشجار، هما الصنوبر البروتي (Pinus brutia) والسرو دائم الاخضرار (Cupressus sempervirens)، على مراكمة عنصري الرصاص (Pb) والزنك (Zn) في منطقة مصفاة بانياس. تم جمع عينات من الأوراق والقلف والخشب لكل نوع نباتي، بالإضافة إلى عينات من التربة المحيطة، وتم تحليلها باستخدام جهاز التحليل الطيفي بالامتصاص الذري. أظهرت النتائج عدم وجود تلوث كبير بهذين العنصرين، وعدم وجود فروق معنوية بين النوعين النباتيين في مراكمة الرصاص والزنك. تراوحت تراكيز الرصاص بين 24.96-30.84 جزء في المليون في الصنوبر البروتي وبين 24.05-30.23 جزء في المليون في السرو دائم الاخضرار. أما تراكيز الزنك فتراوحت بين 34.99-82.99 جزء في المليون في الصنوبر البروتي وبين 18.11-59.86 جزء في المليون في السرو دائم الاخضرار. أظهرت الدراسة تفوق قلف الصنوبر البروتي في مراكمة الرصاص، بينما تفوقت أوراق السرو دائم الاخضرار في مراكمة الزنك. استنتجت الدراسة أن الموقع غير ملوث بشكل كبير بهذين العنصرين، ويمكن استخدام أوراق الصنوبر البروتي كمؤشر حيوي للزنك، وقلف الصنوبر البروتي وأوراق السرو دائم الاخضرار كمؤشرات حيوية للرصاص.
Critical review
دراسة نقدية: على الرغم من أهمية هذه الدراسة في تقييم قدرة النباتات على مراكمة المعادن الثقيلة، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل تضمين أنواع نباتية أخرى لمقارنة أوسع وأشمل. ثانياً، لم تتناول الدراسة تأثيرات هذه المعادن على صحة النباتات نفسها، وهو جانب مهم لفهم الآثار البيئية بشكل كامل. ثالثاً، كان من الممكن تقديم تحليل أكثر تفصيلاً للنتائج باستخدام تقنيات إحصائية متقدمة. وأخيراً، لم تتطرق الدراسة إلى كيفية تطبيق النتائج في برامج إعادة التأهيل البيئي، وهو جانب عملي يمكن أن يضيف قيمة كبيرة للبحث.
Questions related to the research
  1. ما هي الأنواع النباتية التي تم دراستها في هذه البحث؟

    تم دراسة نوعين من الأشجار هما الصنوبر البروتي (Pinus brutia) والسرو دائم الاخضرار (Cupressus sempervirens).

  2. ما هي التقنية المستخدمة لتحليل تراكيز المعادن في العينات النباتية والتربة؟

    تم استخدام جهاز التحليل الطيفي بالامتصاص الذري لتحليل تراكيز المعادن.

  3. ما هي النتائج الرئيسية للدراسة فيما يتعلق بتراكيز الرصاص والزنك؟

    أظهرت النتائج أن تراكيز الرصاص تراوحت بين 24.96-30.84 جزء في المليون في الصنوبر البروتي وبين 24.05-30.23 جزء في المليون في السرو دائم الاخضرار، بينما تراوحت تراكيز الزنك بين 34.99-82.99 جزء في المليون في الصنوبر البروتي وبين 18.11-59.86 جزء في المليون في السرو دائم الاخضرار.

  4. ما هي التوصيات التي خلصت إليها الدراسة؟

    أوصت الدراسة بمتابعة إجراء مثل هذه الدراسات في مختلف المناطق والمؤسسات الصناعية، والاهتمام بالنباتات كأدلة حيوية للتلوث بالعناصر الثقيلة، وتقدير كمية العناصر الثقيلة في باقي أجزاء النبات ولاسيما الجذور.


References used
ASHRAF,M.,OZTURK,M.&AHMAD,M.S.A. Plant adaptation and phytoremediation. Springer Science+ Business Media B.V.,London New York,2010,1-481
AZHAR,N.,ASHRAF,M.Y.,HUSSAIN,M.&HUSSAIN,F .Phytoextraction of Lead (Pb) by EDTA application through Sunflower (Hellanthus Annuus L.) Cultivation:Seedling Growth studies .Pak.j.Bot.,38(5) , 2006, 1551-1560
BASLAR,S.,DOGAN,Y.,DURKAN,N.&BAG,H. Biomonitoring of Zinc and Manganese in bark of Turkish red pine of western AnTOLIA.Journal of Environmental Biology,30(5), 2009, 831-834
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