Distribution of mercury in the sediments of some freshwater bodies in Ethiopia

Kebede Nigussie Mekonnen; Abayneh Ataro Ambushe; Bhagwan Singh Chandravanshi; Mesfin Redi Abshiro; Robert Ian McCrindle; Nikolay Panichev

doi:10.1080/02772248.2012.728602

Distribution of mercury in the sediments of some freshwater bodies in Ethiopia

Kebede Nigussie Mekonnen, Abayneh Ataro Ambushe, Bhagwan Singh Chandravanshi, Mesfin Redi Abshiro, Robert Ian McCrindle, Nikolay Panichev

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Sediment samples were collected from Tinishu Akaki River (TAR), Lake Awassa, and Lake Ziway, Ethiopia for determination of mercury. The air-dried samples were analyzed for mercury with a differential atomic absorption spectrometer after thermal evaporation of bound mercury converting it to its atomic form. Certified reference materials (CRMs) of sediments and soils were used to validate the method. The recovery of mercury from CRMs and sediments was in the range of 95-100%. The limit of detection for the determination of mercury was 50 ng kg ^-1. The concentration of total mercury in the sediments varied from 3.9 to 110 μg kg ^-1 for TAR, 14 to 67 μg kg ^-1 for Lake Awassa, and 17 to 110 μg kg ^-1 for Lake Ziway. It was found that the total mercury concentrations in all samples were below the United States Environmental Protection Agency guideline of 200 μg kg ^-1.

Original language	English
Pages (from-to)	1678-1687
Number of pages	10
Journal	Toxicological and Environmental Chemistry
Volume	94
Issue number	9
DOIs	https://doi.org/10.1080/02772248.2012.728602
Publication status	Published - Oct 2012
Externally published	Yes

Keywords

differential atomic absorption spectrometry
Lake Awassa
Lake Ziway
mercury
sediment
Tinishu Akaki River

ASJC Scopus subject areas

Environmental Chemistry
Pollution
Health, Toxicology and Mutagenesis

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10.1080/02772248.2012.728602

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title = "Distribution of mercury in the sediments of some freshwater bodies in Ethiopia",

abstract = "Sediment samples were collected from Tinishu Akaki River (TAR), Lake Awassa, and Lake Ziway, Ethiopia for determination of mercury. The air-dried samples were analyzed for mercury with a differential atomic absorption spectrometer after thermal evaporation of bound mercury converting it to its atomic form. Certified reference materials (CRMs) of sediments and soils were used to validate the method. The recovery of mercury from CRMs and sediments was in the range of 95-100%. The limit of detection for the determination of mercury was 50 ng kg -1. The concentration of total mercury in the sediments varied from 3.9 to 110 μg kg -1 for TAR, 14 to 67 μg kg -1 for Lake Awassa, and 17 to 110 μg kg -1 for Lake Ziway. It was found that the total mercury concentrations in all samples were below the United States Environmental Protection Agency guideline of 200 μg kg -1.",

keywords = "differential atomic absorption spectrometry, Lake Awassa, Lake Ziway, mercury, sediment, Tinishu Akaki River",

author = "Mekonnen, {Kebede Nigussie} and Ambushe, {Abayneh Ataro} and Chandravanshi, {Bhagwan Singh} and Abshiro, {Mesfin Redi} and McCrindle, {Robert Ian} and Nikolay Panichev",

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AU - Mekonnen, Kebede Nigussie

AU - Ambushe, Abayneh Ataro

AU - Chandravanshi, Bhagwan Singh

AU - Abshiro, Mesfin Redi

AU - McCrindle, Robert Ian

AU - Panichev, Nikolay

PY - 2012/10

Y1 - 2012/10

N2 - Sediment samples were collected from Tinishu Akaki River (TAR), Lake Awassa, and Lake Ziway, Ethiopia for determination of mercury. The air-dried samples were analyzed for mercury with a differential atomic absorption spectrometer after thermal evaporation of bound mercury converting it to its atomic form. Certified reference materials (CRMs) of sediments and soils were used to validate the method. The recovery of mercury from CRMs and sediments was in the range of 95-100%. The limit of detection for the determination of mercury was 50 ng kg -1. The concentration of total mercury in the sediments varied from 3.9 to 110 μg kg -1 for TAR, 14 to 67 μg kg -1 for Lake Awassa, and 17 to 110 μg kg -1 for Lake Ziway. It was found that the total mercury concentrations in all samples were below the United States Environmental Protection Agency guideline of 200 μg kg -1.

AB - Sediment samples were collected from Tinishu Akaki River (TAR), Lake Awassa, and Lake Ziway, Ethiopia for determination of mercury. The air-dried samples were analyzed for mercury with a differential atomic absorption spectrometer after thermal evaporation of bound mercury converting it to its atomic form. Certified reference materials (CRMs) of sediments and soils were used to validate the method. The recovery of mercury from CRMs and sediments was in the range of 95-100%. The limit of detection for the determination of mercury was 50 ng kg -1. The concentration of total mercury in the sediments varied from 3.9 to 110 μg kg -1 for TAR, 14 to 67 μg kg -1 for Lake Awassa, and 17 to 110 μg kg -1 for Lake Ziway. It was found that the total mercury concentrations in all samples were below the United States Environmental Protection Agency guideline of 200 μg kg -1.

KW - differential atomic absorption spectrometry

KW - Lake Awassa

KW - Lake Ziway

KW - mercury

KW - sediment

KW - Tinishu Akaki River

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DO - 10.1080/02772248.2012.728602

M3 - Article

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SN - 0277-2248

VL - 94

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JO - Toxicological and Environmental Chemistry

JF - Toxicological and Environmental Chemistry

IS - 9

ER -

Distribution of mercury in the sediments of some freshwater bodies in Ethiopia

Abstract

Keywords

ASJC Scopus subject areas

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