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The lounge Relax, take a break from photo and camera talk - have a chat about something else for a change. Just keep it clean and polite!

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Harold Gough Harold Gough is offline
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Antibacterials and Other Household Products Nasties

There has been concern over many years about the harmfulness of active ingredients but products are still on sale:

https://thetruthaboutcancer.com/toxi...ning-products/

https://b4brands.com/blog/antibacter...orth-the-risk/

https://eu.floridatoday.com/story/ne...als/404641001/

https://dontmesswithmama.com/7-toxic...ught-cleaners/

https://experiencelife.com/article/8...ning-products/

Harold
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Re: Antibacterials and Other Household Products Nasties

Suppose there is degree of logic to the fact that the chemicals we buy to kill bacteria or whatever, don't just stop short of the killing process on the little bugs...……...
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Harold Gough Harold Gough is offline
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Re: Antibacterials and Other Household Products Nasties

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Suppose there is degree of logic to the fact that the chemicals we buy to kill bacteria or whatever, don't just stop short of the killing process on the little bugs...ÖÖ...
Product which claim to kill 99.9% in fact do. The snag is that that is of the few dozen species they put into the text mix, not the hundreds and thousands of others likely to be present in the home, on our hands, etc.

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Re: Antibacterials and Other Household Products Nasties

And isn’t the over use of this stuff part of the reason we have so many people affected by allergies. Kids with obsessive mothers don’t get the chance do develop immunities like we did.
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Re: Antibacterials and Other Household Products Nasties

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And isnít the over use of this stuff part of the reason we have so many people affected by allergies. Kids with obsessive mothers donít get the chance do develop immunities like we did.
That's my suspicion but I have yet to see than in print anywhere.

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Re: Antibacterials and Other Household Products Nasties

https://www.livescience.com/1870-cle...-increase.html
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Re: Antibacterials and Other Household Products Nasties

Zinc pyrithione, which is the active anti-dandruff ingredient used in Head & Shoulders shampoo works extremely well as an antifouling co-biocide on boats' bottoms.

There were concerns that the concentration of zinc pyrithione used in antifouling paints (which is much stronger than that used in H&S) could promote dermatitis in those applying it; however, the half-life of this biocide in the environment is very short, and certainly much shorter than alternatives such as tributyltin so it was considered safe by the authorities.
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Re: Antibacterials and Other Household Products Nasties

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That's the other side of the coin.

My particular issue is partly that the chemicals may affect health and partly that we may be changing the composition of the microbial populations, possible to our eventual detriment.

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Re: Antibacterials and Other Household Products Nasties

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That's the other side of the coin.

My particular issue is partly that the chemicals may affect health and partly that we may be changing the composition of the microbial populations, possible to our eventual detriment.

Harold
Tributyltin definitely did have an effect on marine organisms, which is why it was banned!

There was strong evidence that tributyltin was affecting the sexuality of dog whelks, but action was only taken when it was found that it was causing autoimmune deficiency in salmon which had nibbled nets coated with tributyltin based antifouling paints (to prevent weed growth). This was in the mid-1980's when autoimmune deficiency, HIV and AIDS were big news.
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Re: Antibacterials and Other Household Products Nasties

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Zinc pyrithione, which is the active anti-dandruff ingredient used in Head & Shoulders shampoo works extremely well as an antifouling co-biocide on boats' bottoms.
So does it work the other way round then? Is there a cheap anti-fouling product thatís as effective but cheaper than shampoo?
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Re: Antibacterials and Other Household Products Nasties

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So does it work the other way round then? Is there a cheap anti-fouling product thatís as effective but cheaper than shampoo?
I wish it were that simple.

People have tried all sorts of biocides in antifouling paints, but most are costly and all have their drawbacks.

The present trend is towards so called 'non-toxic fouling release systems', which are essentially silicone rubbers similar to those used to seal around bathtubs. These work well on vessels such as fast passenger ferries and container ships which travel at speed through deep waters. The real challenge is finding systems that work on yachts and other vessels which spend a long time going nowhere.
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Re: Antibacterials and Other Household Products Nasties

How about an elasticated waterproof ‘bag’ you simply cover the hull with and remove all the water. Simples!
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Re: Antibacterials and Other Household Products Nasties

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How about an elasticated waterproof Ďbagí you simply cover the hull with and remove all the water. Simples!
But then the bag would become fouled!

The bag could of course be changed but any water trapped inside it could support growth.

Copper was first found to be an effective biocide when warships were patched up with copper plates to cover holes caused by canon shot. This led to wooden ships being sheathed with copper - a so called 'copper bottomed investment', - but that caused corrosion problems when iron ships came along in the 19th century so antifouling paints were invented.

Many of these relied on toxic heavy metals which are of course banned now, so all efforts have been directed at finding non-toxic alternatives.

At one time acoustic systems were seen as a possible solution, with a series of transducers fitted to the inside of the hull and broadcasting regular high frequency 'chirps' to ward off hydroids, barnacles and mussels. These are all primitive animal organisms. However, marine fouling covers a very broad spectrum so whilst copper and acoustic systems may deal with animal fouling they do not deter weed, slime or algae. And to complicate matters further, these organisms are often interdependent, so if one settles it may encourage others.
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