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Global Warming Stopped By Adding Lime To Sea
Antiglobalism writes "Scientists say they have found a workable way of reducing CO2 levels in the atmosphere by adding lime to seawater. And they think it has the potential to dramatically reverse CO2 accumulation in the atmosphere, reports Cath O'Driscoll in SCI's Chemistry & Industry magazine published today."
You'd think it'd be obvious, but at slashdot, you actually do need to point that out to people.
The process of making lime generates CO2, but adding the lime to seawater absorbs almost twice as much CO2. The overall process is therefore 'carbon negative'.
RTFA. FTW. My acronyms are more powerful than your anonymity.
If you haven't been down-modded lately, you aren't trying.
Sacred cows make the best hamburger.
RTFA. The article claims this process sequesters twice as much CO2 as is released during the production of lime.
And then all these fish die because of too much acid in the water! Epic Fale.
Uh, not really - Calcium Oxide reduces the acidity of water: Calcium Oxide
This is why we RTFA:
There are potentially huge environmental benefits from addressing climate change and adding calcium hydroxide to seawater will also mitigate the effects of ocean acidification, so it should have a positive impact on the marine environment.
Lime is an alkalide.
Read more here: http://en.wikipedia.org/wiki/Calcium_oxide
Also here: http://www.cquestrate.com/
And this appears to work. I'm sure some not-rtfa'ing people above me will have got in with a quick "making lime generates carbon dioxide hur hur" but the process already takes this into account. By increasing the pH of the seawater, they claim that it will absorb two moles of CO2 for every mole released in the manufacture of lime. I'm not an environmental chemist so I can't comment on the adsorption gradient of seawater, but if they think it'll work then it'll work.
Carbon dioxide dissolves in water:
CO2 + H2O H(+) + HCO3(-)
As does Calcium Oxide (lime)
CaO + H2O Ca(2+) + 2 * OH(-)
Hydroxide and protons naturally combine to form water - it's another equilibrium but the constant is something like 10**-7 (that 7 is the pH of water)
H(+) + OH(-) H2O
i.e. at pH 7, there will be ten million times as much water as either of the other two.
I'd imagine that various equilibrium constants shift around to prove that there's a net increase in the absorption of carbon dioxide from air. It's pretty elementary science - so elementary, I've forgotten how to do it. by simply ascribing a token amount of competence to the scientific background of the people in TFA, it can be shown that they probably know what the hell they're talking about.
Also, there's no doomsday scenario where a drop of lime juice makes the ocean boil pure CO2 and kill us all. As far as I can see.
I am one of many. My idea is not unique, nor do I expect my voice alone to sway you. I speak in a chorus of opinion.
A solution to nasty-tasting seawater! Lemonade oceans FTW!
Except...it's lime.
> I'll leave out the fact that temperatures globally have been flat for several years now
Wise move, since it's an incorrect statement.
http://data.giss.nasa.gov/gistemp/graphs/Fig.A2.lrg.gif
[TMB]
Well, coral (and shellfish) can sequester carbon, but this only works as long as the water is sufficiently non-acidic. The problem is that as atmospheric CO2 is absorbed into the oceans, some of it becomes carbonic acid -- and the acidification of the water means that corals, and shellfish shells, dissolve.
One nice effect of adding lime is that it lowers the acidity of the water, thereby allowing coral and shellfish to continue sequestering carbon.
"Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
You actually need both things... Because all of it has an impact.
That bicycle? It produced as much or more pollution as the car burning the gasoline to produce it unless you're making it entirely out of wood. The same goes for most of the other ones you brought up.
By themselves, they don't accomplish much of anything- and actually in some cases are worse than the "fixes" we've done in the past (Something else you mentioned...).
You've got to take in an even bigger picture than you're doing- otherwise you're no better than the people you're tarring with that brush of yours.
Uhm no?
Making a bike produces a negligible amount of CO2 compared to driving a car, your statement is downright false.
Despite the political rhetoric we have no proof as to how much human activity is contributing to any warming trends, and even less of an idea on the possible side effects of any direct intervention. Other scientists have actually proposed putting more particulate pollution into the air to create a mild 'nuclear winter' style cooling in order to offset any rising temperatures.
I'll leave out the fact that temperatures globally have been flat for several years now, but I will point out in closing that hair brained schemes such as this one remind me of a five year old child trying to rebuild a Formula 1 engine with a pair of chopsticks. We are so very ignorant of how and why we have or can effect the climate. The sheer hubris of some people today who assume we have such great control over climate just amazes, and scares, me.
I agree that the climate is extremely complex, and that while we cannot understand all of the factors involved, we can draw some simple conclusions about some of the effects we are having on the environment.
You probably already know that humans produce a lot of carbon dioxide. We breathe it out, we burn things, and our agricultural and industrial processes create even more.
You probably also know that carbon dioxide is a greenhouse gas, and that greenhouse gasses increase warming due to sunlight.
You may or may not know that the ppm of carbon dioxide has been increasing over the years.
I propose that you cannot prove that we aren't increasing the temperature of the planet
TFA says they did think of this years ago but the problem was back then they wanted to do it on a truly global scale and, with the exception of a few places, getting the lime out of limestone and to the ocean generally puts more CO2 into the atmosphere than the lime would help the ocean take back out of the atmosphere.
IOW, "net negative". Somebody seems to have had the genius thought that just because it can't be done everywhere and act as a "silver bullet" for global warming doesn't mean it isn't worth getting what help it can provide by doing it in those places where it doesn't produce more CO2 than it scrubs.
It's a way of hardening the water, which in turn increases its ability to absorb CO2 without increasing the acidity of the water. The basic chemistry is used by aquarium hobbyists to keep their acidity stable.
Many fish keepers go to great lengths to keep their water in a tight range to mimic their fish's natural environment as close as possible, but empirical evidence suggests that fish can tolerate a wide range of hardness and acidity provided that changes are made slowly. Additionally, it should increase the growth rate of coral.
However, many types of fish may only breed within a given hardness range, so this may end up being a big problem.
Not a typewriter
It isn't GW denying, it's that CO2 probably accounts for less than 25% of the greenhouse effect. If we're looking to manage the greenhouse effect ("manage" because if we overdo it we get a global cooling problem) then it's no good just looking at CO2. The fact that the effects of greenhouse gasses are often quoted in CO2 equivalent tends to mislead people into thinking that CO2 is the only gas that matters.
Quidnam Latine loqui modo coepi?