الرصد البيئي للمعادن الثقيلة في الأعشاب البحرية من مصراتة، ليبيا
DOI:
https://doi.org/10.63359/5a67w330الكلمات المفتاحية:
العناصر الثقبلة، الادلة الحيوية، التراكم، الاعشاب البحرية، MPI، ليبياالملخص
جُمعت ثمانية أنواع من الطحالب البنية (Phaeophyta) والحمراء (Rhodophyta) والخضراء (Chlorophyta) من مصراتة على الساحل الليبي. خضعت العينات للهضم باستخدام جهاز الميكروويف Milestone Start D. حُددت مستويات النحاس (Cu) والكادميوم (Cd) والرصاص (Pb) والنيكل (Ni) والزنك (Zn) والحديد (Fe) في عينات الطحالب باستخدام مطياف الامتصاص الذري. سُجلت أعلى مستويات للمعادن في الطحالب، حيث بلغت 8.136 ميكروغرام/غرام من الوزن الجاف للرصاص، و0.783 ميكروغرام/غرام للكادميوم، و4.857 ميكروغرام/غرام للنحاس، و16.67 ميكروغرام/غرام للنيكل، و164.28 ميكروغرام/غرام للزنك، و588.1 ميكروغرام/غرام للحديد. بينما كانت المستويات طبيعية للكادميوم والنحاس والرصاص والنيكل والزنك والحديد. أظهرت النتائج أن تركيز المعادن الثقيلة انخفض بالترتيب التالي: Fe < Zn < Ni < Pb < Cu < Cd. كما أظهرت النتائج أن الطحالب البنية سجلت أعلى تراكم للمعادن. من بين الأعشاب البحرية التي تمت دراستها، تم الكشف عن أعلى تركيز للمعادن في نوع Padina pavonica، ويمكن استخدام هذا النوع لمراقبة المياه الساحلية على الساحل الليبي.
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