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by Victerius 4y ago

chinathrow 4y ago
> I would be banned if I laid out the remainder of my thinking. Go ahead.
- Aachen 4y ago
  I don't know what a bannable offense on HN would be, inciting violence perhaps? Wishing harm upon certain groups? Either way, I'm not sure we need to invite it if they already say it's over the line and not suitable. If we can have a civil discussion then obviously I'm with you that everyone should have their say... but that wouldn't elicit a ban.
  - NaturalPhallacy 4y ago
    Irritating dang is enough.
pbhjpbhj 4y ago
Throwaway accounts are a thing ...
hammock 4y ago
Can be purified. Activated charcoal filters are not the most efficient solution, but work reasonably well and can be easily built in an off-grid environment
- johnchristopher 4y ago
  > In order to make activated charcoal with all its nooks and crannies, regular carbon sources are transformed in one of two ways: either physically or chemically. > In physical activation, wood, coal, or any regular carbon source is first heated up to 600 to 900 degrees Celsius (1000 to 1600 degrees Fahrenheit) in a chamber filled with inert gas. The inert gas ensures that the carbon doesn’t burn. Instead, as the carbon is heated, any impurities left on it are vaporized and removed, leaving nothing but pure carbon. > Next, the pure carbon is exposed to oxygen or steam baths at even higher temperatures. This causes the carbon to fracture and form the fractal shapes with their extremely large total surface area. > In chemical activation, raw carbon sources are mixed with an acid, base, or a salt. The mixture is then heated. Chemical activation takes less heat and less time to achieve the end result, which makes it the method of choice for large scale activation. Doesn't look "easily" to me but that's the first link google showed me (https://www.thinkcrucial.com/blogs/blog/how-activated-charcoal-filters-work https://www.thinkcrucial.com/blogs/blog/how-activated-charco...) What bothers me though is that our environment is changing so much and so fast that homo sapiens could not emerge tomorrow like they did first. No way a primate without culture or science is going to regularly scramble a charcoal filter to drink water.
  - hammock 4y ago
    Basic Steps Burn hardwood to make charcoal. Cool overnight. Powder the charcoal using a hammer or mortar and pestle. Add calcium chloride solution. Spread on a clean sheet or cheesecloth. Bake at 250 F for 30 minutes or until all moisture is entirely gone.
    - justnotworthit 4y ago
      According to a trial in nicaragua, from memory (google it), 25%-50% salt solution; soak the charcoal (which is crushed to the point of not filtering too much through whatever filtering mechanism you're going to use) for 24 hours; let dry in the sun (plenty of sun in their trial, i assume baking is the same). (Can't remember if they rinsed).
TylerE 4y ago
Life is unsafe. I suspect you would be at a much much much higher risk from not having ready access to medicine and doctors than PFAS.
- throw8383833jj 4y ago
  Or at higher risk from having access to medicine and doctors. The overuse of medicine as the solution to everything is causing a lot of harm. A pill for every ill. In the US, it's not uncommon for people to be taking 7 different pills at once! I don't think people lived like this 100 years ago.
  - TylerE 4y ago
    People died young from totally treatable Illnesses 100 years ago. Being diabetic was basically a death sentence
  - qzw 4y ago
    100 years ago people sat in rotting whale carcasses to cure their ailments[0]. People have actually always taken weird crap for whatever ailed them because we’re pretty fragile creatures with many afflictions. I’ll gladly trade dying of simple cuts and strep throat for modern medicine, even if I have to take 7 different pills at once. [0] https://www.smithsonianmag.com/smart-news/prescription-rheumatism-used-be-sit-inside-rotting-whale-30-hours-180950335/ https://www.smithsonianmag.com/smart-news/prescription-rheum...
throw8383833jj 4y ago
why is this comment downvoted? I think it's a legitimate complaint about rainwater not being safe from PFAS.

chinathrow 4y ago

> I would be banned if I laid out the remainder of my thinking. Go ahead.

Aachen 4y ago
I don't know what a bannable offense on HN would be, inciting violence perhaps? Wishing harm upon certain groups? Either way, I'm not sure we need to invite it if they already say it's over the line and not suitable. If we can have a civil discussion then obviously I'm with you that everyone should have their say... but that wouldn't elicit a ban.
- NaturalPhallacy 4y ago
  Irritating dang is enough.

pbhjpbhj 4y ago

Throwaway accounts are a thing ...

hammock 4y ago

Can be purified. Activated charcoal filters are not the most efficient solution, but work reasonably well and can be easily built in an off-grid environment

johnchristopher 4y ago
> In order to make activated charcoal with all its nooks and crannies, regular carbon sources are transformed in one of two ways: either physically or chemically. > In physical activation, wood, coal, or any regular carbon source is first heated up to 600 to 900 degrees Celsius (1000 to 1600 degrees Fahrenheit) in a chamber filled with inert gas. The inert gas ensures that the carbon doesn’t burn. Instead, as the carbon is heated, any impurities left on it are vaporized and removed, leaving nothing but pure carbon. > Next, the pure carbon is exposed to oxygen or steam baths at even higher temperatures. This causes the carbon to fracture and form the fractal shapes with their extremely large total surface area. > In chemical activation, raw carbon sources are mixed with an acid, base, or a salt. The mixture is then heated. Chemical activation takes less heat and less time to achieve the end result, which makes it the method of choice for large scale activation. Doesn't look "easily" to me but that's the first link google showed me (https://www.thinkcrucial.com/blogs/blog/how-activated-charcoal-filters-work https://www.thinkcrucial.com/blogs/blog/how-activated-charco...) What bothers me though is that our environment is changing so much and so fast that homo sapiens could not emerge tomorrow like they did first. No way a primate without culture or science is going to regularly scramble a charcoal filter to drink water.
- hammock 4y ago
  Basic Steps Burn hardwood to make charcoal. Cool overnight. Powder the charcoal using a hammer or mortar and pestle. Add calcium chloride solution. Spread on a clean sheet or cheesecloth. Bake at 250 F for 30 minutes or until all moisture is entirely gone.
  - justnotworthit 4y ago
    According to a trial in nicaragua, from memory (google it), 25%-50% salt solution; soak the charcoal (which is crushed to the point of not filtering too much through whatever filtering mechanism you're going to use) for 24 hours; let dry in the sun (plenty of sun in their trial, i assume baking is the same). (Can't remember if they rinsed).

TylerE 4y ago

Life is unsafe. I suspect you would be at a much much much higher risk from not having ready access to medicine and doctors than PFAS.

throw8383833jj 4y ago
Or at higher risk from having access to medicine and doctors. The overuse of medicine as the solution to everything is causing a lot of harm. A pill for every ill. In the US, it's not uncommon for people to be taking 7 different pills at once! I don't think people lived like this 100 years ago.
- TylerE 4y ago
  People died young from totally treatable Illnesses 100 years ago. Being diabetic was basically a death sentence
- qzw 4y ago
  100 years ago people sat in rotting whale carcasses to cure their ailments[0]. People have actually always taken weird crap for whatever ailed them because we’re pretty fragile creatures with many afflictions. I’ll gladly trade dying of simple cuts and strep throat for modern medicine, even if I have to take 7 different pills at once. [0] https://www.smithsonianmag.com/smart-news/prescription-rheumatism-used-be-sit-inside-rotting-whale-30-hours-180950335/ https://www.smithsonianmag.com/smart-news/prescription-rheum...

throw8383833jj 4y ago

why is this comment downvoted? I think it's a legitimate complaint about rainwater not being safe from PFAS.