Talk:Cadmium/Archive 1

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Article changed over to new WikiProject Elements format by maveric149. Elementbox converted 12:40, 6 July 2005 by Femto (previous revision was that of 06:32, 21 June 2005). 21 June 2005

Talk
- "Extremely toxic"? Isn't that a little extreme? Many people in my industry handle it without precautions (which they should use) and suffer no short term ill effects. 

I agree that "extremely toxic at low concentrations" is a bit of a stretch. Animal subjects have to be exposed to low doses of cadmium (both oral and inhalation) for 1-3 months before any signs of toxicity appear. Substances like sarin or hydrogen cyanide are extremely toxic, but not cadmium.Jay Litman 12:21, 26 September 2006 (UTC)

I wouldn't say sarin or HCN are extremely toxic, they're extremely harmful, but once they're out of your body they're gone for good. PCBs are extremely toxic. Many people expose themselves to cyanides everyday or more, it's in a number of root vegetables people in hot countries eat. I THINK exposure to small doses is actually good for your body in some way, like it helps produce a vitamin or more hemoglobin, but again, it doesn't build up over the years. So long as someone has received a less than gigantic dose, you can cure them by dragging them outside and giving them some O2; the cyanide will burn off the electron carrier chains.

I just went ahead and removed 'extremely.'--Jay Litman 17:36, 19 October 2006 (UTC) - I'm not a chemist, but in the "Most Stable Isotopes" table, should it be Cadmium 108, not 188?


 * I agree, 188Cd must be wrong. JWSchmidt 08:17, 23 Mar 2004 (UTC)

What about the story that says the name Cadmium derives from King Cadmus of Phoenicia from Greek mythology ? Jay 16:52, 25 Feb 2004 (UTC)

Lots of websites I visited said that 60% of cadmium is used in electroplating, not 6%. Which is correct?

Well the cadium is actually extremely toxic. I mean look up itai-itai disease

Cadmium in fertilizer
I found severl links which mention risk of Cadmium in fertilizers. The phosphate ore contains cadmium and if not extracted it ends in the fertilizer. It looks like the EU made a upper level for Cadmium in Fertilizer. Stone 10:15, 3 March 2006 (UTC)

Precautions section
This section needs a serious overhaul. It contains redundancy, scientifically obsolete statements, and several dead links. I'm going to start updating/rewriting. If anyone finds a problem or inconsistency with my edits, please leave a comment here. Thanks! -- Jay &dagger;  Litman  21:17, 1 December 2006 (UTC)

Color Inconsistency
The infobox states that Cadmium is "silvery gray", and the first paragraph text and the "Notable Characteristis" setion say that it is "bluish white". Stifynsemons 08:15, 22 December 2006 (UTC)

I think that the In popular Fiction section is completely out of place and needs to be removed. —Preceding unsigned comment added by Madris (talk • contribs) 23:06, 8 September 2007 (UTC)

casesin
What is casesin in the article? Warut 09:08, 3 November 2007 (UTC)


 * Since no one around here seems to know what casesin is, I'll remove it from the article. Warut 15:34, 10 November 2007 (UTC)

hilumin in metal sample
hi

i would like to ask a question regarding cadmium.

I work in a chemcial testing lab. Recently i have received a metal sample that the client claim that it the metal base material contain hilumin with nickel, tin and gold plated. After i analyse, i discover that there is a high concentration of cadmium... Would it be possible that there is cadmium in the metal material? For what i know, i only know that lead concentration is often occur high in plating material.

is there any test where i can test if there is any cadmium in a metal sample??? Does tin contain cadmium in it. Or does hilumin had cadmium content in it??

this is my email: eyemoe@hotmail.com

regards

nicole --202.156.6.54 15:26, 29 June 2006 (UTC)


 * With your nickel and gold plating, as far as I know, it's quite possible to have a small bit of cadmium involved. This article does list 6% usage in electropating. Look up a book on Inorganic Chemical Analysis like Vogel's or try digesting some your sample to aspirate through a flame atomic absorption spectrometer. Your spelling of hilumin confuses me. :)--Thecurran (talk) 08:15, 1 July 2008 (UTC)

Meter
The article has contained the following assertion nearly since its inception:


 * In 1927, the International Conference on Weights and Measures redefined the meter in terms of a red cadmium spectral line (1m = 1,553,164.13 wavelengths). This definition has since been changed (see krypton).

The assertion is unsupported by any reference, and the article on meter, which contains a history of definitions of the meter, does not mention cadmium at all. In fact, it states that the definition in 1927 was changed to the distance between two lines on a platinum-iridium bar. Does anyone know whence this assertion came? Julesd 19:58, 7 October 2008 (UTC)

Shouldn't Cadmium be in Category:Biology and pharmacology of chemical elements ?
Shouldn't Cadmium be in Category:Biology and pharmacology of chemical elements ? Eldin raigmore (talk) 20:46, 16 May 2009 (UTC)

Reactivity?
I can't find a section on reactivity on this article, even though the other elements in the d-block have it. I think it would be really helpful, if not consistant. MewtwoDude (talk) 15:28, 9 December 2009 (UTC)

Phrasing
This was poorly said: "Cadmium does the same job as zinc in other anhydrases, but the diatoms live in environments with very low zinc concentrations, thus biology has taken cadmium rather than zinc, and put it to work." I don't know enough about Cadmium to describe it in a roll usually filled by zinc, so I just changed it to "Cadmium is more abundant and preforms the same function that zinc would in a zinc-rich environment." 64.190.57.34 (talk) 14:12, 4 June 2010 (UTC)

Information Sources
Some of the text in this entry was rewritten from Los Alamos National Laboratory - Cadmium. Additional text was taken directly from USGS Cadmium Statistics and Information, from the Elements database 20001107 (via dict.org), Webster's Revised Unabridged Dictionary (1913) (via dict.org) and WordNet (r) 1.7 (via dict.org). Data for the table were obtained from the sources listed on the subject page and WikiProject Elements but were reformatted and converted into SI units. -- Where is the original $3.55 price from? (And what is the purity it refers to?) It certainly conflicts with the $12/lb stated at the above-mentioned LANL site. -Nathan24601 (talk) 18:55, 8 October 2008 (UTC) -- Do you have a specific reference for this? Zinc forms many complex compounds and I have never been under the impression that cadmium forms more complex compounds.--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)

Cancer from Cadmium
It would be nice to know how you expose yourself to cancer from Cadmium. Do you have to eat it? Hold it? be near it? hold a cadmium battery?

Otherwise it's just a silly statement that cadmium can cause cancer. —Preceding unsigned comment added by 141.189.251.1 (talk) 16:03, 15 February 2008 (UTC)
 * The carcinogenicity of cadmium is still an area of controversy with many researchers believing that observed responses are due to the confounding effects of other carcinogens rather than the presence of cadmium or cadmium oxide. Cadmium toxicity depends upon the species and the concentration. All forms of cadmium at all concentrations are not toxic since it is a naturally occurring element. Please see the source for verification--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)

Decrease of overall consumption
Free-world consumption of cadmium in the period from 2000 to 2010 has remained relatively stable at 20,000 mt per year, a figure that now includes consumption in China and Russia. An explanation for a decrease of  direct cadmium consumption  in the United States  may be the shift of the cadmium market away from coatings and pigments that used to be done in the United States to nickel-cadmium batteries which are now all manufactured in China and Japan. World consumption of cadmium has increased not decreased from the 1970s to 2010. Please see source: Kirk-Othmer Encyclopedia of Chemical Technology, Article Cadmium. I thus deleted the sentence.--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)

Other uses: Helium Cadmium Metal Vapor Laser
This is a very specialized and insignificant use. I don’t think this needs to be part of the article.--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)

Hydrogen embrittlement
This sentence is confusing and invokes the impression that cadmium plating should not be used on low alloy steels or titanium alloys. In fact it has been used on both materials for many years.--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)

Deletion of Toxicity paragraph on Cadmium and Zinc
Paragraph deleted. What is the basis for this statement, and what specific biological systems are involved? The statement requires a reference to be credible.--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)

Tabacco Smoke
“Tobacco smoking is the most important single source of cadmium exposure in the general population. It has been estimated that about 10%” - Do you have a source for this figure?--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)
 * --Stone (talk) 19:18, 17 June 2010 (UTC)

The introduction of nickel-metal hydride batteries
The introduction of NiMH batteries had only a minor effect on the NiCd battery market and only for a short time. Lithium-ion batteries are now the rechargeable battery chemistry of choice, and the NiMH battery market is shrinking because of much higher nickel and cobalt contents in NiMH batteries, along with much higher metal prices. --Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)
 * Do you have a source?--Stone (talk) 19:20, 17 June 2010 (UTC)

Other uses: Train painted with Cadmium Orange (picture)
Is there a source for this? I don’t think Cadmium is used in on trains anymore. Cadmium pigments are no longer used in automotive paints for example.--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)
 * The train is old and the image description on Wikimedia states it is old cadmium yellow.--Stone (talk) 19:21, 17 June 2010 (UTC)

Class
The cites seem OK (one ref per para), although cite 33 is unclear. If a compounds section was added, I think this would be a straight B. Lanthanum-138 (talk) 11:56, 9 May 2011 (UTC)

Isotopes
The above information on the isotopes of cadmium seems to me to be a bit esoteric and of limited interest to the general Wikipedia reader. Does anybody feels the same?--Hugh Morrow (talk) 15:27, 17 June 2010 (UTC)
 * no, i usually read that among the first sentences213.233.92.45 (talk) 13:05, 6 June 2011 (UTC)

Cadmium Vs. Mercury
Which is more toxic? Just curious; I would guess they have similar mechanisms of action since their chemical properties are similar, but I wonder which one would be a more effective poison. —Preceding unsigned comment added by 70.99.104.234 (talk) 22:34, 19 December 2008 (UTC)
 * I think mercury is more toxic (or at least more popular as a poison throughout history). You may be interested in reading Emsley's Elements of Murder which discusses cases of poisoning involving various elements. Mercury is one of the main elements featured in the book (together with lead, thalium, and arsenic); cadmium receives only a brief mention in the last chapter together with other elements. --Itub (talk) 19:59, 23 December 2008 (UTC)

I don't think 321C qualifies as a "low melting point" compared to -39C. It seems that if a similarity should be drawn to mercury, this shouldn't be it. --24.213.110.33 (talk) 15:09, 19 December 2011 (UTC)

File:Cadmium-crystal bar.jpg to appear as POTD soon
Hello! This is a note to let the editors of this article know that File:Cadmium-crystal bar.jpg will be appearing as picture of the day on August 31, 2012. You can view and edit the POTD blurb at Template:POTD/2012-08-31. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! — howcheng  {chat} 18:58, 29 August 2012 (UTC)

Electroplating
A description of the visual appearance of a cadmium plated surface would be appropriate. The appearance should be distinguished from chromium, nickel and zinc. PeterEasthope (talk) 13:40, 20 August 2014 (UTC)

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Anti-fluoridationist material and sourcing
I have, for the second time, removed comments about cadmium as an alleged contaminant of fluoridation additives to water, sourced from the notorious anti-fluoridationist crusader Phyllis Mullenix. I do not intend to pursue further removal of this material if it is added back yet again. Rather than continue, myself personally, to remove this inappropriate, and inappropriately sourced, material, I would like to start a discussion here, for achievement of consensus on the relevant issues—although, as a general matter, Wikipedia consensus already condemns addition of material to articles for purposes of WP:FRINGE POV-pushing, especially in articles with no clear relationship to the fringe POV involved.

The removed comments were originally added, and then added back after the first removal, by user, who has a history of adding similar POV anti-fluoride material to pages which, like Cadmium, have no obvious connection with fluoride or dentistry, including:   As far as I can tell, none of these insertions was accompanied by discussion on the talk page of the article in question.
 * Fredrick J. Stare (diff)
 * Hives (diff)
 * Osteitis fibrosa cystica (diff)
 * Paresthesia (diff)

The relevant issues include not only the appropriateness of bringing anti-fluoridationist material into the Cadmium article at all, but also the appropriateness of treating a crusader for a WP:FRINGE theory, even in academic publications, as a reliable source for material directly related to the fringe theory in question. In view of Phyllis Mullenix's known history as an anti-fluoridationist crusader, her formal qualifications do not make her a reliable source on the topic, any more than Linus Pauling's Nobel and other eminent qualifications as a biochemist make him a reliable source on vitamin C as a treatment for cancer. Although bias and non-neutrality in general may not exclude a source as reliable, extreme advocacy of a WP:FRINGE theory can still invalidate the reliability of even so eminent a source as Pauling—let alone Mullenix—at least for questions directly related to the fringe theory. WP:RS points out that the creator of a work, as well as the venue of publication, can be relevant to its reliability. Also see the comments on promoters of fringe theories as sources in the section WP:PROFRINGE within WP:FRINGE.

—Syrenka V (talk) 06:44, 19 February 2019 (UTC)
 * Since cadmium fluoride is used in the creation of metal alloys (https://en.wikipedia.org/wiki/Cadmium_fluoride) and fluoridation chemicals are sourced from pollution control systems of phosphorus and metal factories, it is entirely plausible that cadmium is present in fluoridation chemicals. That cadmium is not tested for under current EPA guidelines does not negate the independent testing of those fluoridation chemicals any more than the POV of a wiki editor negates the credibility of a qualified toxicologist who published those test results. That there is no 'discussion' on this page is only indicative of the effectiveness of those who persistently promote a biased pro-fluoridation point of view that denies scientific findings in discouraging the sharing of inconvenient science. Seabreezes1 (talk) 23:28, 11 May 2019 (UTC)

References for the discovery of Cadmium




--Stone (talk) 21:11, 31 July 2020 (UTC)