Assessment of metal content and toxicity of leachates from teapots
Identifieur interne : 000C02 ( Main/Exploration ); précédent : 000C01; suivant : 000C03Assessment of metal content and toxicity of leachates from teapots
Auteurs : Ali Boularbah [Maroc] ; Gabriel Bitton [États-Unis] ; J. L Morel [France]Source :
- Science of the Total Environment [ 0048-9697 ] ; 1999.
Descripteurs français
- Wicri :
- geographic : Maroc.
English descriptors
- KwdEn :
- Chromium (adverse effects), Chromium (analysis), Cooking and Eating Utensils, Copper (adverse effects), Copper (analysis), Food Contamination (analysis), Humans, Metals, Heavy (adverse effects), Metals, Heavy (analysis), Morocco, Nickel (adverse effects), Nickel (analysis), Tea (adverse effects), Tea (chemistry), Tin (adverse effects), Tin (analysis), Zinc (adverse effects), Zinc (analysis).
- MESH :
- chemical , adverse effects : Chromium, Copper, Metals, Heavy, Nickel, Tea, Tin, Zinc.
- chemical , analysis : Chromium, Copper, Metals, Heavy, Nickel, Tin, Zinc.
- chemical , chemistry : Tea.
- geographic : Morocco.
- analysis : Food Contamination.
- Cooking and Eating Utensils, Humans.
Abstract
Metallic teapots traditionally used in Morocco were investigated for release of toxic metals from the teapots and their toxicity, as determined by MetPAD, a bacterial toxicity test that is specific for heavy metal toxicity. Our data show that some teapots were non-toxic while a few others were highly toxic, as shown by MetPAD. Tea addition reduced somewhat heavy metal toxicity due possibly to the complexing ability of tea. Chemical analysis of teapot leachates showed that some contained zinc and copper. Teapot No. 5, which showed the highest toxicity, also displayed the highest Zn concentration (7.39 mg/l), confirming the toxicity data. Based on estimates of tea consumption in Morocco, we showed that the extra daily burden of Zn ranged from 1.75 to 4.2 mg/day, assuming the maximum zinc concentration of 7.4 mg/l, as found in our study. This represents 3.5–8% of the LOAEL for zinc of 50 mg/day and would not be important as compared to other sources of zinc intake.
Url:
DOI: 10.1016/S0048-9697(99)00005-4
Affiliations:
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L Morel</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Sols et Environnement, ENSAIA, Vandoeuvre</wicri:regionArea><wicri:noRegion>Vandoeuvre</wicri:noRegion><wicri:noRegion>Vandoeuvre</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Science of the Total Environment</title><title level="j" type="abbrev">STOTEN</title><idno type="ISSN">0048-9697</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1999">1999</date><biblScope unit="volume">227</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="69">69</biblScope><biblScope unit="page" to="72">72</biblScope></imprint><idno type="ISSN">0048-9697</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0048-9697</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chromium (adverse effects)</term><term>Chromium (analysis)</term><term>Cooking and Eating Utensils</term><term>Copper (adverse effects)</term><term>Copper (analysis)</term><term>Food Contamination (analysis)</term><term>Humans</term><term>Metals, Heavy (adverse effects)</term><term>Metals, Heavy (analysis)</term><term>Morocco</term><term>Nickel (adverse effects)</term><term>Nickel (analysis)</term><term>Tea (adverse effects)</term><term>Tea (chemistry)</term><term>Tin (adverse effects)</term><term>Tin (analysis)</term><term>Zinc (adverse effects)</term><term>Zinc (analysis)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="adverse effects" xml:lang="en"><term>Chromium</term><term>Copper</term><term>Metals, Heavy</term><term>Nickel</term><term>Tea</term><term>Tin</term><term>Zinc</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Chromium</term><term>Copper</term><term>Metals, Heavy</term><term>Nickel</term><term>Tin</term><term>Zinc</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Tea</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Morocco</term></keywords><keywords scheme="MESH" qualifier="analysis" xml:lang="en"><term>Food Contamination</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Cooking and Eating Utensils</term><term>Humans</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Maroc</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Metallic teapots traditionally used in Morocco were investigated for release of toxic metals from the teapots and their toxicity, as determined by MetPAD, a bacterial toxicity test that is specific for heavy metal toxicity. Our data show that some teapots were non-toxic while a few others were highly toxic, as shown by MetPAD. Tea addition reduced somewhat heavy metal toxicity due possibly to the complexing ability of tea. Chemical analysis of teapot leachates showed that some contained zinc and copper. Teapot No. 5, which showed the highest toxicity, also displayed the highest Zn concentration (7.39 mg/l), confirming the toxicity data. Based on estimates of tea consumption in Morocco, we showed that the extra daily burden of Zn ranged from 1.75 to 4.2 mg/day, assuming the maximum zinc concentration of 7.4 mg/l, as found in our study. This represents 3.5–8% of the LOAEL for zinc of 50 mg/day and would not be important as compared to other sources of zinc intake.</div></front></TEI><affiliations><list><country><li>France</li><li>Maroc</li><li>États-Unis</li></country><region><li>Floride</li><li>Marrakech-Tensift-Al Haouz</li></region><settlement><li>Marrakech</li></settlement></list><tree><country name="Maroc"><region name="Marrakech-Tensift-Al Haouz"><name sortKey="Boularbah, Ali" sort="Boularbah, Ali" uniqKey="Boularbah A" first="Ali" last="Boularbah">Ali Boularbah</name></region></country><country name="États-Unis"><region name="Floride"><name sortKey="Bitton, Gabriel" sort="Bitton, Gabriel" uniqKey="Bitton G" first="Gabriel" last="Bitton">Gabriel Bitton</name></region></country><country name="France"><noRegion><name sortKey="Morel, J L" sort="Morel, J L" uniqKey="Morel J" first="J. L" last="Morel">J. L Morel</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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