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تعد مطروحات المستشفيات واحدة من اهم
مصادر تلوث الانهار بالمواد السامة
وذلك لما تحتويه من معادن ثقيلة مثل
الكادميوم والنيكل والرصاص وغيرها من
المواد السامة التي تطرح من مصادر
مختلفة داخل المستشفيات وتنتقل
بدورهاعبر المجرى الى محطات المعالجة
البايولوجية الخاصة بالمستشفيات ومنها
الى النهر. تناول البحث قياس تراكيز
عدد من المعادن الثقيلة الموجودة في
مطروحات بعض المستشفيات في مدينة
الموصل وهي(السلام ,مجمع المستشفيات,
الخنساء) قبل دخولها محطة المعالجة
البايولوجية وبعد خروجها منها لمعرفة
كفائتها في ازالة تلك المعادن ومعرفة
التراكيز المطروحة، ومدى مطابقة
المياه المصرفة للمحددات البيئية
الخاصة بالتصريف للنهر.
Evaluate of the Efficiency of
Heavy Metal Removal in Wastewater
Treatment Plants of hospitals in
Mosul city
The research focuses on the
measurement of concentrations of
some heavy metals that are likely to
be found in effluents of three
hospitals plants in Mosul city
namely Al-Salam; hospitals groups,
and Al-Khansaa. in order to assess
the removal efficiency of the
process and to estimate and compare
the concentration of heavy metal
from each plant with the Iraqi
permissible levels.
Besides measuring concentration of
heavy metals (Cu, Zn, Fe, Cd, Pb and
Ni), laboratory tests to assess the
wastewater quality were also
conducted to measure (pH, E.C, COD,
BOD, PO4, NO3, SO4, Cl-).
Results revealed that there was an
increase in chemical oxygen demand
(COD) as compared to biological
oxygen demand (BOD) in the effluent
water of the three hospitals; that
may be attributed to high content of
chemicals and toxic materials.
The efficiency of heavy metal
removal was different among the
three plants. Concentrations of (Cd,
Pb, Ni and Fe) passes the maximum
acceptable level of environmental
specific effluents while (Cu, and
Zn) concentrations were within
environmental specific effluents .
Phosphate concentration was found to
increase due to the excessive use of
detergents in the hospitals.
The efficiency of heavy metal
removal in AL-Khansaa treatment
plant showed a decrease as compared
to plants of other hospitals because
of the short retention time in the
aeration stage.
Organized by: Walid Hikmat
RAK, United Arab Emirates
Tel: +971 50 374 0617
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