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Soil pH changes induced by contamination by magnesium oxides dust

Identifieur interne : 000350 ( Istex/Corpus ); précédent : 000349; suivant : 000351

Soil pH changes induced by contamination by magnesium oxides dust

Auteurs : J. Machín ; A. Navas

Source :

RBID : ISTEX:B3244B06011C2A680D607CD2CBDC16EC8ECF57E7

English descriptors

Abstract

In this paper we evaluate the environmental impact of dust emission from a magnesite calcination factory during the last 40 years over an area of about 600 ha in northern Spain. Our study aimed to determine the contamination levels through the spatial modifications induced on the soil pH by deposition of the dust, mostly composed of magnesium oxides. A soil survey of the area has been conducted by collecting soil samples at three different depths (0–2, 2–32 and 32–52 cm) following a square grid pattern. Our survey has evidenced an important and general pH increase of the soils. Thus, from original values of around 7, pH reaches alkaline values of above 9·5. IDRISI GIS techniques have been used to analyse and represent the spatial distribution of the pH values. Variations in the expected concentric circular pattern of soil pH distribution appear to be related to climatic factors, such as precipitation, wind direction and intensity. Also topography affects pH distribution through its ‘screen’ effect. The contamination levels in the area have a strong environmental impact responsible for the abandonment of some agricultural lands. Copyright © 2000 John Wiley & Sons, Ltd.

Url:
DOI: 10.1002/(SICI)1099-145X(200001/02)11:1<37::AID-LDR366>3.0.CO;2-8

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ISTEX:B3244B06011C2A680D607CD2CBDC16EC8ECF57E7

Le document en format XML

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<extent unit="tables">6</extent>
<extent unit="references">10</extent>
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<abstract lang="en">In this paper we evaluate the environmental impact of dust emission from a magnesite calcination factory during the last 40 years over an area of about 600 ha in northern Spain. Our study aimed to determine the contamination levels through the spatial modifications induced on the soil pH by deposition of the dust, mostly composed of magnesium oxides. A soil survey of the area has been conducted by collecting soil samples at three different depths (0–2, 2–32 and 32–52 cm) following a square grid pattern. Our survey has evidenced an important and general pH increase of the soils. Thus, from original values of around 7, pH reaches alkaline values of above 9·5. IDRISI GIS techniques have been used to analyse and represent the spatial distribution of the pH values. Variations in the expected concentric circular pattern of soil pH distribution appear to be related to climatic factors, such as precipitation, wind direction and intensity. Also topography affects pH distribution through its ‘screen’ effect. The contamination levels in the area have a strong environmental impact responsible for the abandonment of some agricultural lands. Copyright © 2000 John Wiley & Sons, Ltd.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>magnesite dust</topic>
<topic>pH</topic>
<topic>alkalization</topic>
<topic>soil contamination</topic>
<topic>land abandonment</topic>
<topic>Spain</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Land Degradation & Development</title>
</titleInfo>
<titleInfo type="abbreviated">
<title>Land Degrad. Dev.</title>
</titleInfo>
<genre type="journal">journal</genre>
<subject>
<genre>article-category</genre>
<topic>Research Article</topic>
</subject>
<identifier type="ISSN">1085-3278</identifier>
<identifier type="eISSN">1099-145X</identifier>
<identifier type="DOI">10.1002/(ISSN)1099-145X</identifier>
<identifier type="PublisherID">LDR</identifier>
<part>
<date>2000</date>
<detail type="volume">
<caption>vol.</caption>
<number>11</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>1</number>
</detail>
<extent unit="pages">
<start>37</start>
<end>50</end>
<total>14</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">B3244B06011C2A680D607CD2CBDC16EC8ECF57E7</identifier>
<identifier type="DOI">10.1002/(SICI)1099-145X(200001/02)11:1<37::AID-LDR366>3.0.CO;2-8</identifier>
<identifier type="ArticleID">LDR366</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 2000 John Wiley & Sons, Ltd.</accessCondition>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>John Wiley & Sons, Ltd.</recordOrigin>
</recordInfo>
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</metadata>
<serie></serie>
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