Solubility of salt in heavy water vs. "regular" water

I would like to know if salt can be dissolved in heavy water ($\ce{D2O}$) as it would be in normal water ($\ce{H2O}$). 


If so, what will the maximum salinity be in $\ce{D2O}$? I know the maximum in $\ce{H2O}$ is about 26% of salt by mass.




Well, consider a salt as $\ce{AB\_s}$ in water you have :


$$\ce{AB}\_s\rightleftharpoons \ce{A\_{aq}^{q+} + B\_{aq}^{q-}}$$


And $\Delta H\_{s}=-\ce{U +\Delta H\_{aq}}$ where $\ce{U}$ is the lattice energy.


When the salt needs to be solvate, $\ce{O-H}$-bonds of water molecules around this salt need to be rearranged. More, the "$\ce{DO}$-bonds" in $\ce{D\_2O}$ are stronger than "$\ce{HO}$-bonds".$^1$ Then it will be harder to rearranged hence it will cost more energy to solvate the salt which will be then less soluble in heavy water than in water.


I found [an article](http://pubs.acs.org/doi/pdf/10.1021/je60070a011) in the JACS and as you can see on the image below the maximum solubility of $\ce{KCl}$ in heavy water is a little less than in water (you can make a linear extrapolation) the difference is not quite importante but it looks it exists. 


[![Solubility in water and heavy water too](https://i.stack.imgur.com/V574J.png)](https://i.stack.imgur.com/V574J.png)


Look at the second reference $^2$.




---


$^1$ : <https://arxiv.org/ftp/arxiv/papers/0706/0706.1355.pdf>, p-5



> 
>  Nuclear quantum effects are particularly important in the different
>  properties of light (H2O) and heavy water (D2O) where the more restricted atomic vibrations in D2O
>  reduce the negative effect of its van der Waals repulsive core so increasing its overall hydrogen bond 
>  energy.
> 
> 
> 


$^2$ : For the image, <http://pubs.acs.org/doi/abs/10.1021/je60070a011>


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