Difference between revisions of "Lead"

Latest revision as of 13:23, 9 August 2020

Notes

lead © Greg Robson

Anthropogenic use of lead in metallic from (battery casings, lead pipes) are usually recycled. But, lead used as petrol additives are largely lost to the atmosphere. This lead enters the marine ecosystem globally though rain. Coastal areas, with a lot of near shore automobile activity, can have considerably increased lead contamination^[3]. The reduction of leaded gasoline in the last decades resulted in decline of 50%, between 1981 and 1989, of the lead surface concentrations in the North Atlantic surface waters^[4].

Compared with other heavy metals, lead in the sea isn't particularly toxic. Its toxicity is also mostly determined by its chemical form, lead bound to organic compounds is much more toxic than inorganic lead^[4]. So can some organisms accumulate high concentrations of inorganic lead without any apparent harm. In polluted areas barnacles can accumulate up to 100 ppm (parts per million) and mussels in Norway have been shown to contain up to 3000 ppm of lead. These mussels have a detoxifying mechanism for lead; they can store large quantities as granules (solid form) in their digestive gland (an organ that helps digest food). However, environmental concentrations above 10 ppm are shown to be detrimental for the growth of some organisms (some crustaceans and algae species)^[3]. Other sublethal effects of too high lead concentrations include: anemia, reduced egg-hatching, fin degeneration and behavioural abnormalities^[4].

Like most other metals lead doesn't show biomagnifying characteristics. As a consequence it is normally of little harm to fish eating mammals or birds. However, a rare incident of lead poisoning has occurred along the birds wintering on the Mersey estuary, near Liverpool. 2400 birds, mainly dunlins, died in 1979. The birds had 10 ppm (wet weight) of trialkyllead (an organic form of lead, which is more toxic) in their liver. Factory discharges caused lead to accumulate in the bivalve Macoma balthica, the primary food for these birds^[3].

Case studies

Heavy metal content of mussels in the Western Scheldt estuary

Common starfish can act as a bioindicator for heavy metal pollution

Heavy metals in various Belgian benthic invertebrates

Environmental standards and legislation

Included in the OSPAR list of substances of priority action

Included in the water framework list of priority substances

References

↑ http://en.wikipedia.org/wiki/Lead
↑ http://glossary.eea.europa.eu/terminology/concept_html?term=lead
↑ ^3.0 ^3.1 ^3.2 Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161
↑ ^4.0 ^4.1 ^4.2 Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp

The main author of this article is Daphnis De Pooter
Please note that others may also have edited the contents of this article.

Citation: Daphnis De Pooter (2020): Lead. Available from http://www.coastalwiki.org/wiki/Lead [accessed on 24-11-2024]

For other articles by this author see Category:Articles by Daphnis De Pooter
For an overview of contributions by this author see Special:Contributions/Daphnisd

[1] ttp://en.wikipedia.org/wiki/Lead

[2] ttp://glossary.eea.europa.eu/terminology/concept_html?term=lead

[c-3] 3.0 ^3.1 ^3.2 Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161

[ken-4] 4.0 ^4.1 ^4.2 Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp

[1]

[2]

[3]

[4]

@@ Line 1: / Line 1: @@
-{{
+{{tocright}}
-Definition|title= lead
+{{Definition|title= lead
+|definition=Lead is a [[heavy metals|heavy metal]] with symbol Pb and atomic number 82<ref>http://en.wikipedia.org/wiki/Lead</ref>. It has a bluish white colour, when freshly cut, but tarnishes to dull gray when exposed to air. It is also highly malleable<ref>http://glossary.eea.europa.eu/terminology/concept_html?term=lead</ref>.}}.
-|definition=Lead is a [[heavy metals|heavy metal]] with symbol Pb and atomic number 82.<ref>http://en.wikipedia.org/wiki/Lead</ref> It has a bluish white color, when freshly cut, but tarnishes to dull gray when exposed to air. It is also highly malleable.  <ref>http://glossary.eea.europa.eu/terminology/concept_html?term=lead</ref>}}
 == Notes ==
-[[Image:lead.png|thumb|right|200px| <div style="text-align: center;">
+[[Image:lead.png|thumb|right|150px| <div style="text-align: center;">
 lead © Greg Robson
 </div>]]
-[[Anthropogenic]] use of lead in metallic from (battery casings, lead pipes) are usually recycled. However lead used as petrol additives are largely lost to the atmosphere. This lead enters the marine ecosystem globally though rain. However coastal areas with a lot of near shore automobile activity can have considerably higher lead contamination. <ref name = c>Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161</ref> The reduction of leaded gasoline in the last decades caused the surface concentrations of lead in the North Atlantic surface waters to decline by 50% between 1981 and 1989.<ref name = ken>Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp</ref>
+[[Anthropogenic]] use of lead in metallic from (battery casings, lead pipes) are usually recycled. But, lead used as petrol additives are largely lost to the atmosphere. This lead enters the marine [[ecosystem]] globally though rain. Coastal areas, with a lot of near shore automobile activity, can have considerably increased lead contamination<ref name = c>Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161</ref>. The reduction of leaded gasoline in the last decades resulted in decline of 50%, between 1981 and 1989, of the lead surface concentrations in the North Atlantic surface waters<ref name = ken>Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp</ref>.
+Compared with other heavy metals, lead in the sea isn't particularly [[toxic]]. Its toxicity is also mostly determined by its chemical form, lead bound to organic compounds is much more toxic than inorganic lead<ref name = ken>Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp</ref>. So can some organisms [[bioaccumulation|accumulate]] high concentrations of inorganic lead without any apparent harm. In polluted areas barnacles can accumulate up to 100 ppm (parts per million) and mussels in Norway have been shown to contain up to 3000 ppm of lead.
+These mussels have a detoxifying mechanism for lead; they can store large quantities as granules (solid form) in their digestive gland (an organ that helps digest food). However, environmental concentrations above 10 ppm are shown to be detrimental for the growth of some organisms (some crustaceans and algae species)<ref name = c>Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161</ref>. Other sublethal effects of too high lead concentrations include: anemia, reduced egg-hatching, fin degeneration and behavioural abnormalities<ref name = ken>Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp</ref>.
+Like most other metals lead doesn't show [[biomagnification|biomagnifying]] characteristics. As a consequence it is normally of little harm to fish eating [[pollution and marine mammals|mammals]] or [[pollution and sea birds|birds]]. However, a rare incident of lead poisoning has occurred along the birds wintering on the Mersey estuary, near Liverpool. 2400 birds, mainly dunlins, died in 1979. The birds had 10 ppm ([[wet weight]]) of trialkyllead (an organic form of lead, which is more toxic) in their liver. Factory discharges caused lead to accumulate in the bivalve [http://www.marinespecies.org/aphia.php?p=taxdetails&id=141579 ''Macoma balthica''], the primary food for these birds<ref name = c>Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161</ref>.
+<P>
+<BR>
+<P>
+== Case studies ==
+[[Heavy metal content of mussels in the Western Scheldt estuary]]<P>
+[[Common starfish can act as a bioindicator for heavy metal pollution]]<P>
+[[Heavy metals in various Belgian benthic invertebrates]]
+<P>
+<BR>
-Compared with other heavy metals, lead in the sea isn't particularly toxic. Its toxicity is also mostly determined by its chemical form, lead bound to organic compounds is much more toxic than inorganic lead.<ref name = ken>Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp</ref> So can some organisms [[bioaccumulation|accumulate]] high concentrations of inorganic lead without any apparent harm. In polluted areas barnacles can accumulate up to 100 ppm (parts per million)  and mussels in Norway have been shown to contain up to 3000 ppm of lead.
+== Environmental standards and legislation ==
-These mussels have a detoxifying mechanism for lead; they can store large quantities as granules (solid form) in their digestive gland (an organ that helps digest food). However, environmental concentrations above 10 ppm (parts per million) are shown to be detrimental for the growth of some organisms (some crustaceans and algae species).<ref name = c>Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161</ref> Other sublethal effects of to high lead concentrations that have been demonstrated include: anemia, reduced egg-hatching, fin degeneration and behavioral abnormalities.<ref name = ken>Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp</ref>
-Like most other metals lead doesn't show [[biomagnification|biomagnifying]] characteristics. As a consequence it is normally of little harm to fish eating [[pollution and marine mammals|mammals]] or [[pollution and sea birds|birds]]. However, a rare incident of lead poisoning has occurred along the birds wintering on the Mersey estuary, near Liverpool. 2400 birds, mainly dunlins, died in 1979. The birds had 10 ppm ([[wet weight]]) of trialkyllead (an organic form of lead, which is more toxic) in their liver. Factory discharges caused lead to accumulate in the bivalve ''Macoma baltica'', the primary food for these birds. <ref name = c>Clark, R,B., 1999. Marine pollution. Oxford University press, Fourth edition, pp 161</ref>
+[[OSPAR List of priority substances|Included in the OSPAR list of substances of priority action]]
+[[List of priority substances|Included in the water framework list of priority substances]]
+<P>
+<BR>
 == See also ==
-[[Heavy metal content of mussels in the Western Scheldt estuary]]
+[http://www.vliz.be/projects/endis/EDnorth.php?showchemprop=true&showeffects=true&chemeffects=true&chemid=214 Lead on the ED North Database]
-[[Common starfish can act as a bioindicator for heavy metal pollution]]
-[[Heavy metals in various Belgian benthic invertebrates]]
+[http://www.vliz.be/vmdcdata/ecotox/ecotox.php?action=DispChem&ChemID=214 Lead on the Ecotox Database]
+[http://www.ospar.org/v_publications/download.asp?v1=p00148 OSPAR background document on lead]
+<BR>
 ==References==
 <references/>
+{{author
+|AuthorID=19826
+|AuthorFullName=Daphnis De Pooter
+|AuthorName=Daphnisd}}
+[[Category:Toxicity chemicals]]

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