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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Mercury contamination due to zinc smelting and chlor-alkali production in NE China  [2011]

Zheng, Na; Liu, Jingshuang; Wang, Qichao; Liang, Zhongzhu;

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Zinc smelting and chlor-alkali production are major sources of Hg contamination to the environment, potentially leading to serious impacts on the health of the local population. Huludao, NE China has been heavily contaminated by Hg due to long-term Zn smelting and chlor-alkali production. The aim of this work was to determine Hg accumulation in the aquatic and terrestrial environment, as well as in the human population of Huludao. The investigation included: (a) Hg accumulation in sediments, Spirogyra algae, crucian carp and shrimp, (b) Hg distribution in soil, vegetables and corn, and (c) assessment of potential health effects of Hg exposure associated with total Hg (T-Hg) concentrations in human hair. Measured T-Hg concentrations in sediments of Wuli River ranged from 0.15 to 15.4mgkg⁻¹, with the maximum Hg concentration in sediment exceeding the background levels in Liaoning Province by 438 times. The maximum T-Hg levels in Spirogyra, crucian carp and shrimp were 13.6, 0.36, and 0.44mgkg⁻¹, respectively. Total-Hg concentrations in hair of the human population varied from 0.05 to 3.25mgkg⁻¹ (average 0.43mgkg⁻¹). However, the frequency of paraesthesia to most inhabitants in Huludao was estimated to be lower than 5%, with only one person rated at 50%. The results indicated minimal adverse health effects of Hg exposure to the inhabitants of Huludao, despite the serious Hg contamination of the environment.
From the journal
Applied geochemistry
ISSN : 0883-2927

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2015
Volume:
26
Issue:
2
Start Page:
188
End Page:
193
Publisher:
Elsevier Ltd
All titles:
"Mercury contamination due to zinc smelting and chlor-alkali production in NE China"@eng
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2015
Volume:
26
Issue:
2
Start Page:
188
End Page:
193
Publisher:
Elsevier Ltd
All titles:
"Mercury contamination due to zinc smelting and chlor-alkali production in NE China"@eng