Water+and+Soil

=Water and Soil=

Heavy Metals Ions, Phosphates, and Their Precipitation From Water
The concept of trying to make this fun, while actually making it understandable was exceedingly baffling - so, in the end, I just settled for making it easier to understand, which almost counts as more fun. And so I went on a lengthy internet search, looking for something that would explain all of this sensibly. And - I found several good slideshows/explanations/worksheets explaining precipitation of heavy metal ions, the common ion effect and cation exchange capacity.

The equipment in the picture to the left is one type of apparatus used to remove heavy metal ions from water.

http://www.slideshare.net/wsautter/solubility-products - Slideshow (quite word heavy) explaining everything you could possibly want to know about solubility. And probably a lot more, too.

No pretty pictures, or anything, but questions (and answers) that I found useful while revising for the test. Not all (I think) entirely relevant to this particular aspect of solubility, but there is some stuff about heavy ions. And it's probably all useful, anyway.

http://www.kchemistry.com/the_keq_family.htm - Again, not all relevant to environmental chemistry, but scroll down to the bottom, and there's heavy metal precipitation sample questions.

http://www.water.siemens.com/en/applications/wastewater_treatment/metals-removal/Pages/default.aspx - Actually just an article on the removal of heavy metal ions, but at least it gives this section of the topic an actual real-life application, which makes it all seem more worthwhile.