Sewage Plants Struggle To Treat Fracking Wastewater

I'd like to think that more people would have an idea of what is actually in these fluids. There is a lot of information out there. Don't say "BUT.. BUT... THE COMPANIES DON'T WANT YOU TO KNOW WHATS IN THEM!" because that's not necessarily the case. Southwestern Energy has a nice inforgraphic [google.com] as to what can go into a frac fluid, and in approximate quantities. You can find many more online. Even Halliburton [halliburton.com] tells you what's in their fluids!

We make a host of additives for frac fluids, like viscosifiers (the chemicals guar or xanthan gum), friction reducers like PHPA (the chemical partially hydroxylated polyacrylamide), and sand (the chemical silicon dioxide) or ceramic beads (typically bauxite based).

The items mentioned in the article make it sound like "they are adding benzene and barium to the fluids, and we had no idea that they do this!". I'll help you guys out. Barite (barium sulfate ore) is added to every oil well in the world as a weighting agent for the drilling mud. It's solubility in water is nil. Would water that is flushed down a well that has been drilled capable of picking up barium that has formed a filter cake on the walls of the bore? Sure, but it's also in EVERY WATER OR OIL MUD USED IN EVERY WELL IN THE WORLD.

Benzene in the frac fluid? Nobody adds benzene to frac fluid. Here is most likely how it got there: oil based drilling muds use diesel as a carrier fluid (if the drilling is done on land, not the case offshore). Diesel has 30% aromatic content (ie. benzene, toluene, xylene). IF the well was drilled with an oil mud AND the well was recently finished being drilled AND it was recently cleared out, then the first part of the "waste" frac fluid will probably contain benzene.

They don't care right? WRONG. They do on site testing to make sure the sample doesn't sheen or have any type of oil based fluids in the water. If it does, then the water has to be treated before being disposed (i.e. sewage, lakes, rivers, etc). So my question to the people testing these fluids: At what point did they test for benzene? Did the frac water come from a well that was drilled using diesel? Did the frac water come from a well using water based fluids? Were these random frac waste samples? What part of the country did these frac water samples come from? Did the frac water encounter aromatic hydrocarbons in the formation?

These things are needed to come to a conclusion as to where did these chemicals come from.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/LIlJXw0SaAE/story01.htm

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