Talk:Copper/Archive 3

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Please add helpful information below directly under "Occurrence" sub heading.

Copper is the 25th most abundant element in Earth's crust, representing 50 ppm compared with 75 ppm for zinc, and 14 ppm for lead.^[1] Ravensbrew (talk) 04:08, 16 July 2021 (UTC)

 Done ScottishFinnishRadish (talk) 10:57, 16 July 2021 (UTC)

In the subsection Ancient and post-classical of History, in the second paragraqph there is a link leading to the biology article https://en.wikipedia.org/wiki/Supergene instead of https://en.wikipedia.org/wiki/Supergene_(geology), as probably was intended and fits context better. — Preceding unsigned comment added by 141.84.250.1 (talk) 14:41, 25 November 2021 (UTC)

 Done Thank you for noticing. BiologicalMe (talk) 14:49, 25 November 2021 (UTC)

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Can I edit 107.196.237.244 (talk) 23:14, 26 January 2022 (UTC)

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate.

There are some errors in Copper#Methods chapter:

• Cuprous Sulfide Converts to Cuprous Oxide:

2 Cu₂S + 2 O₂ → 2 Cu₂O + 2 SO₂

• Production of blister copper:

2 Cu₂O + Cu₂S → 6 Cu + 2 SO₂

I can't edit article, please correct them. --DoroWolf (talk) 05:21, 29 March 2022 (UTC)

I can edit now. Help is no longer needed.--DoroWolf (talk) 06:17, 29 March 2022 (UTC)

Description of copper+air 119.2.125.166 (talk) 07:53, 26 June 2022 (UTC)

In Copper#Chemical it is explained that copper reacts with oxygen in the air to form an oxide. The kind of oxide that is formed depends on the environmental conditions. –LaundryPizza03 (dc̄) 11:38, 26 June 2022 (UTC)

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An editor has accidentally used the Cyrillic letter с (Es) instead of the Latin letter c in two words in this article. This wasn't vandalism, just an error by an editor with a Cyrillic keyboard.

In the following text, both "сyprium" and "сuprum" are using the Cyrillic letter instead of the Latin one, which apart from being wrong causes the font's kerning to be off.

Please change the following:

''aes сyprium'' (metal of Cyprus), later corrupted to ''сuprum''

to the identically looking:

''aes cyprium'' (metal of Cyprus), later corrupted to ''cuprum''

31.209.210.42 (talk) 22:29, 29 June 2022 (UTC)

 Done Nice catch. --Kent G. Budge (talk) 23:55, 29 June 2022 (UTC)

The maximum permissible current density of copper in open air is stated to be "approximately 3.1E6 A/m2 of cross-sectional area, above which it begins to heat excessively". I believe this to be incorrect by an order of magnitude (closer to 31E6 A/m^2). For example, for a, 18 AWG wire, with diameter of 0.001 m and area ~7.9E-7 m^2, the max current density would be 2.4 A = 3.1E6 A/m^2 * 7.9E-7 m^2. This is clearly not correct. The correct max current is ~ 24 A for a single 18 AWG wire in air (which corresponds to ~100C temperature, but rapidly increases in temperature with small increases in current). In summary, I believe the article should be corrected with 31.E6 rather than 3.1E6. 75.135.188.17 (talk) 13:19, 23 November 2022 (UTC)

Needs a WP:SCIRS source. Zefr (talk) 05:02, 24 November 2022 (UTC)

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The "Physical" section contains the line "the energy difference between these shells corresponds to orange light.[citation needed]"

That should read "the energy difference between these shells corresponds to absorption of blue light."

The energy difference between the d & s shells corresponds to blue light. Reflected light without the blue makes the copper appear red.

Two citations are: https://www.flinnsci.com/api/library/Download485982234af046b491724d3736c93c51

and

http://ee.iitm.ac.in/~hsr/ec301/copper.pdf

1.159.58.220 (talk) 02:37, 17 October 2022 (UTC)

The flinnsci link leads to a 404 page. Do you have an archive or alternate link?

--MtPenguinMonster (talk) 05:25, 27 December 2022 (UTC)

Additionally, the other source mentions nothing about the energy levels of d & s electron shells, but it does say that blue light corresponds to the cutoff frequency of silver, not copper. Do you have a source which doesn't contradict your claim?

--MtPenguinMonster (talk) 05:38, 27 December 2022 (UTC)

 Not done for now: please establish a consensus for this alteration before using the {{Edit semi-protected}} template. Lemonaka (talk) 07:55, 27 December 2022 (UTC)

Today, the flinnsci pdf is at https://www.flinnsci.com/api/library/Download/485982234af046b491724d3736c93c51. If it moves again, you may be able to find it by searching for "when light is shined upon copper metal, the copper atoms absorb some of the light in the blue-green region of the spectrum"

I'm sorry that it appears that the other pdf contradicts the claim. That's a misunderstanding of the paper. The flinnsci pdf is written for students with minimal scientific understanding, and the iitm.ac pdf is for people who already understand the subject.

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Blackwellj28 (talk) 17:41, 12 January 2023 (UTC)What copper can be made for 1.kitchen sinks   2.table tops 3. Jewelry 4. Door knobs and door handles 5. Railings 6. Tools 7. Musical instruments 8. Wire.

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. Cannolis (talk) 18:59, 12 January 2023 (UTC)

According to a website, the fire diamond is a level one health hazard and a level one fire hazard.^[1]

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There is a grammatical error in the Folk-medicine section. Change: "In one trial for osteoarthritis and one trial for rheumatoid arthritis, no differences is found between copper bracelet and control (non-copper) bracelet." To: "In one trial for osteoarthritis and one trial for rheumatoid arthritis, no differences were found between copper bracelet and control (non-copper) bracelet." Shrekinspector (talk) 18:36, 20 January 2023 (UTC)

 Done–small jars tc 18:47, 20 January 2023 (UTC)

This article was the subject of a Wiki Education Foundation-supported course assignment, between 13 January 2023 and 15 April 2023. Further details are available on the course page. Student editor(s): Hylaversicolor (article contribs). Peer reviewers: Shrekinspector, Pg.pinapple.

— Assignment last updated by ChloejWard (talk) 03:40, 15 April 2023 (UTC)

I essentially only want to edit the history section (copper age & ancient and post-classical) of the copper page and expand upon the relatively little known history of copper usage by very early north American indigenous peoples starting approximately 10,000 years ago. I want to include these additions to the history section of the main copper page because currently the history section is biased towards Eurasia and does not represent historically marginalized peoples from around the world. I understand why this is the case as most of our recorded history comes from this region of the world but as new finding from North America challenge traditional perspectives I feel that the history section should be as up to date and unbiased as possible, reflecting the true historical use of copper globally. Hylaversicolor (talk) 15:18, 1 March 2023 (UTC)

Sounds very interesting. I am looking forward into reading this new info. DePiep (talk) 04:50, 2 March 2023 (UTC)

The following sentence in quotations needs to be edited because more recent findings may make the following sentence potentially inaccurate. although mining did occur on Isle Royale between 800 and 1600, it does appear to be the earliest evidence of mining copper in the region and more recent publications suggest mining began in the region 8000 years before present. "In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600". Findings from this more recent publication suggest copper mining began in North America 8000 years ago. The sentence in quotations has a reference dated to 1995 and evidence from the more recent scientific study was published in 2013. Hylaversicolor (talk) Hylaversicolor (talk) 01:14, 18 March 2023 (UTC)

@Hylaversicolor: Where can I find this 2013 study? –LaundryPizza03 (dc̄) 05:11, 18 March 2023 (UTC)

Here is the 2013 study. https://pubs.acs.org/doi/10.1021/es304499c Pompeani, David P.; Abbott, Mark B.; Steinman, Byron A.; Bain, Daniel J. (2013-05-14). "Lake Sediments Record Prehistoric Lead Pollution Related to Early Copper Production in North America". Environmental Science & Technology. 47 (11): 5545–5552. doi:10.1021/es304499c. ISSN 0013-936X. Hylaversicolor (talk) Hylaversicolor (talk) 00:25, 19 March 2023 (UTC)

Cuprum isn't a corruption, just unlatinized. 2600:1700:6801:C10:68C7:4A0B:2425:7003 (talk) 04:52, 3 May 2023 (UTC)

I'd like to add a sentence to reflect Britain's and the industrial revolution's impact on copper, ... and another for the impact of German miners ... and another to acknowledge the slave trade. However I'm conscious this page was initially about the element Cu, and that there are other pages / articles. Other editors may feel the article warrants a more detailed history for their country or specific interest in mining, smelting milling, coppersmiths etc. Before making changes I thought I'd start a discussion to see if there is any interest.

My proposal:

Add "Germany was a major producer of copper in the 16^th century,[1] with mines at Mansfeld and Rammelsberg." before "The Great Copper Mountain ..." and "In the first decade of the 19th century Britain produced over 70% of the World’s copper from Cornish ore smelted in South Wales using Welsh coal.[1] This was helped by the industrial revolution with the use of steam pumps to drain mines.[2] Copper was the “red gold” of Africa and was cast into manilas to trade for slaves, while copper sugar pans were used to refine the sugar cane.[3] As British ore was exhausted New World mines increased in importance with the United States of America becoming dominant for most of the 20^th Century and Chile in the 21^st century (see List of countries by copper production)" after "Sweden had a copper backed currency."

References

[1] https://www.google.co.uk/books/edition/_/oXjppt5BYjEC?hl=en&gbpv=1&pg=PA2 Stephen Hughes Copperopolis 2008

[2] https://copper.org/education/history/60centuries/industrial_age/itseffect.php (Cites B Webster Smith “60 centuries of copper”)

[3] https://www.google.co.uk/books/edition/_/UVQAAAAAYAAJ?hl=en&gbpv=1&pg=PA254 Penny magazine June 1842 “A day at a copper and lead factory” pp.249 - 256

See also https://web.archive.org/web/20211110124326/https://copperalliance.org.uk/about-copper/copper-history/copper-through-the-ages/ History of copper through the ages from the copper age to modern times OldCroydonian (talk) 11:57, 4 May 2023 (UTC)

I wondered why Kernow/Cornwall and the richest square mile (due to copper) was not mentioned in the Copper article 85.10.117.114 (talk) 14:57, 6 November 2023 (UTC)

Who makes this claim? And what is the precise nature of the claim? Can you provide a couple of reliable references for it? Feline Hymnic (talk) 15:20, 6 November 2023 (UTC)

As a relative newbie, I struggle to know how much detail is relevant in an encyclopaedia, especially in a general article like Copper. My feeling is that Kernow's important contribution to the copper industry is best served by a separate article that can provide more context and detail than a general article. There are already articles on Mining in Cornwall and Devon - Wikipedia, Cornish Copper Company - Wikipedia, History of Cornwall - Wikipedia and Cornwall - Wikipedia, which may be appropriate to expand. A link from the See also section of Copper - Wikipedia would be appropriate and hopefully uncontentious... OldCroydonian (talk) 14:04, 7 November 2023 (UTC)

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I would like to add an "Environmental Impact" subsection to the "Production" section. Here is what I suggest for the content of that subsection:

The environmental on climate cost of copper mining, as measured in 2019, is estimated at 3.7 kg CO2eq per kg of copper^[1]. A more recent report from Codelco, a major producer in Chile, states that in 2020 the company emitted 2.8t CO2eq per ton (2.8 kg CO2eq per kg) of fine copper^[2]. Greenhouse gas emissions primarily arise from electricity consumed by the company, especially when sourced from fossil fuels, and from engines required for copper extraction and refinement. Companies that mine land often mismanage waste, rendering the area sterile for life. Additionally, nearby rivers and forests are also negatively impacted. The Philippines is an example of a region where land is overexploited by mining companies^[3].

Copper mining waste in Valea Şesei, Romania, has significantly altered nearby water properties. The water in the affected areas is highly acidic, with a pH range of 2.1–4.9, and shows elevated electrical conductivity levels between 280–1561 mS/cm^[4]. These changes in water chemistry make the environment inhospitable for fish, essentially rendering the water uninhabitable for aquatic life^[5].

Research111 (talk) 20:26, 4 October 2023 (UTC)

Sounds like a good idea. But there are some spelling mistakes. I could fix those if you don't mind. Adding where emissions come from may be redundant, as effectively every industrial process causes GHG emissions.

A paragraph on wastes would also be good, and the anti-microbial properties of copper could be pointed out as a contributing factor (if I'm not mistaken). KetchupSalt (talk) 07:53, 10 October 2023 (UTC)

KetchupSalt: I think you should move forward implementing this, and make adjustments if you think they should be made (after all, you'd do the same if Research111 had directly edited the article themselves).

I'm marking this as responded-to. Research111: if you think this edit request needs further attention, please feel free to reactivate it by changing the "answered=" parameter to "no".

--Pinchme123 (talk) 23:12, 12 October 2023 (UTC)

I added point of KetchupSalt and fixed mistakes. Now seem good to go ? Research111 (talk) 09:18, 16 October 2023 (UTC)

antimicrobial properties is already listed in Applications/Antimicrobial of the article.

I add waste effect Research111 (talk) 22:46, 15 October 2023 (UTC)

 Done Tollens (talk) 06:00, 19 October 2023 (UTC)

The redirect 銅 has been listed at redirects for discussion to determine whether its use and function meets the redirect guidelines. Readers of this page are welcome to comment on this redirect at Wikipedia:Redirects for discussion/Log/2024 January 25 § 銅 until a consensus is reached. Utopes _{(talk / cont)} 09:19, 25 January 2024 (UTC)

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Change the word (from [[Latin]]:cuprum) to (etymology|la|cuprum) to ensure the consistency among others. 2001:EE0:4BCA:FD50:B50C:773B:1A40:16BA (talk) 11:12, 4 February 2024 (UTC)

 Done Thanks. Liu1126 (talk) 12:57, 4 February 2024 (UTC)

I am concerned that this article no longer meets the good article criteria due to uncited statements in the article, including one tagged as such since 2016. There's also some other tags in the article that should be resolved. Is anyone interested in resolving this concern, or should this go to WP:GAR? Z1720 (talk) 03:30, 14 January 2025 (UTC)

Recent work has reported a copper(-I) compound and so the infobox should be revised to add this to the list of oxidation states with the following paper cited https://doi.org/10.1038/s41467-025-56544-z Jackson, R.A., Evans, N.J., Babula, D.J. et al. Nucleophilicity at copper(-I) in a compound with a Cu–Mg bond. Nat Commun 16, 1101 (2025). https://doi.org/10.1038/s41467-025-56544-z 138.38.24.38 (talk) 16:31, 17 February 2025 (UTC)

 Done, edited the appropriate template accordingly. Choucas Bleu 🐦‍⬛ 22:12, 19 February 2025 (UTC)

Thank you! 138.38.24.38 (talk) 14:10, 28 February 2025 (UTC)