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Article
Distribution of Heavy metals in Sediments of North Zone of Basrah Governate

Author: A.Z. Raaheem
Journal: Marsh Bulletin مجلة الاهوار ISSN: 18169848 Year: 2009 Volume: 4 Issue: 1 Pages: 75-84
Publisher: Basrah University جامعة البصرة

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Abstract

The determination of heavy metals (Cu, Cd, Co, Mn and Ni) in 4 locations of sediments of north zone Basrah were achieved by means of Atomic Absorption spectroscopy were determined in sediments samples . The results showed that the higher concentrations of Cu were (14.42 µg/gm)at station (4), Cd (19.596 µg /gm) at Station (1) , Co (24.309 µg/gm) at station (2) , Mn(111.577 µg/gm) at station (1) , and Ni (207.319µg/gm) at station (2) . The sediment pollution with heavy metals thought to be due to different sources such as urban wastes , industrial of different sources such as urban wastes , industrial effluents , land washout and boatsactivates


Article
DETERMINATION OF TRACE METALS INMAHAWEEL RIVERSEDIMENTS BY ACID EXTRACTION

Author: Suha K. Al-Zahawie
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2009 Volume: 12 Issue: 4 Pages: 7-13
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Abstract
In this study, a boiling mixture of acids (20% HCl + 80% HNO3) was used to extract trace
metals from sediments for Mahaweel River (branch of Euphrates). The elements of interest included
Na, Mg, Ca, Cr, Cu, Pb, Hg and Ni, all of which can be determined by electro thermal atomic
absorption spectrometry (ETAAS). High recoveries percentage 96, 97, 99, 99, 97.5 and 95 for Na,
Mg, Ca, Cr, Cu, and Pb, respectively. The relative standard deviation of the method is less than
3%. Calibration graphs for Pb, Ni and Cr were found to be linear between 100-250, 80-180, 180-
250 ng/mL, respectively However, when the acid extraction method was applied to some selected
sediments, the resulting trace metal concentrations, although reproducible. Apparently SRM-1645
provided too favorable an assessment of the true accuracy of the method with ordinary sediments.

تضمنت هذه الدراسة استخدم مزيج مغلي من حامض الهيدروكلوريك بنسبة 20% و حامض النتريك بنسبة 80% لتقدير العناصر الموجودة كمترسبات في مجرى نهر المحاويل( فرع صغير من نهر دجلة). والعناصر التي تم دراستها هي كل من عنصر الصوديوم، الكالسيوم، المغنيسيوم، الكروم، النحاس، الرصاص، الزئبق و النيكل باستخدام تقنية الامتصاص الذري غير اللهبي فكانت نسبة الاسترجاع عالية 96، 97، 99، 99، 97 و 95 لكل من العناصر اعلاه على التوالي مع مدى خطية 100-250 و 80-180 و180- 250 نانوغرام/مل لكل من الرصاص والنيكل والكروم على التوالي وان الانحراف القياسي النسبي أقل من 3%.

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