This is classic acid mine drainage, the red is Iron III hydroxide. The pH at the effluent interface was around 3. Theres a biological component to how acid mine draininage occurs: Thiobacillus ferrooxidans metabolizes FeS2 to Fe+3 and Sulfuric acid.

The bacterium runs this reaction: (half reactions listed because I'm lazy.)

FeS2 + 3.5 O2 + H2O --> Fe2+ + 2 SO4(2-) + 2 H+

2 Fe2+ + 0.5 O2 + 2 H+ --> 2 Fe3+ + H2O

Then the freed Iron III makes the problem even worse by this reaction which happens independent of bacteria.

FeS2 + 14 Fe3+ + 8 H2O --> 15 Fe2+ + 2 SO4(2-) + 16 H+

Practical information on the Historic Cities of Minas Gerais from my blog in English: Destination: Historical Cities

Información práctica sobre las Cidades Históricas de Minas Gerais en mi blog en español: Destinos: Cidades Históricas

Materials for ironing

blogged:

afancifultwist.typepad.com/a_fanciful_twist/2009/10/the-o...

SMC Pentax DA 18-55mm F3.5-5.6 AL WR

The former Baltimore Public Works Museum. Baltimore, MD.

These are 10x15 cm, and are made to keep order in earrings. Don't know what I should call them in English. May be you can help me?

Practical, economical but very boring would be a good description of this diesel Vauxhall Minerva which was my hire car for June/July 2011.. It is seen here at Godnow Bridge in North Lincolnshire.

I'm running practical nights for camera clubs

A great hands on evening, enjoyed by all.

My haphazard attempts to conquer the world of knits have produced a plain but comfy and practical tank-top. Hopefully future versions will be a little more exciting; this was basically a proof-of-concept.

Practical Debt Relief offers debt settlement and consumer credit counseling services in Miami. Get help with debt consolidation, relief or even settlements by calling our Miami location today!

More practical then strollers

Processed with VSCOcam with f2 preset

A woman with a large spot on her big nose ,a big chin and a green complexion was being served while we were there ,take it thats her transport outside.

Drinking dirty water is one of the most serious threats to human life. Diseases caused by unclean water and inadequate sanitation claim the lives of over one million children each year. Most cases can be prevented or treated. Oxfam is recognised as a global leader in working with communities to build clean water systems, toilets and deliver vital hygiene education.

Papua New Guinea, Pacific

Location : Principal of Ecology (BIO3500) Practical | UMT

Exif : D90 | Sigma 70-300 (Macro) | 270mm | 1/100 | F13 | ISO 500 | Spot Matering

Song : Sendiri Kesepian - Zamree (Mozam Man) www.youtube.com/watch?v=5j9gK3WvCW0

Poem :

Di saat gundah membeku

Terpaut di dadaku menyebakkan kalbu

Kesepian yang mencengkam

Membangkitkan rinduku padamu kasihku

Masih terbayang di ruang mataku

Kala engkau membelai mesra rambutku

Airmatamu membasahi wajahku

Kau ucapkan resah sendumu

Mengiringi langkah kepergianmu

Gemercik air pancuran mengusik kesyahduan

Musnahlah kenangan

Apakah ini suratan yang telah ditakdirkan

Sendiri kesepian

51/366 - paper art

My copy of Practical Photography arrived today and includes a tutorial on forcing some sheets of paper into curves. the idea is to use natural light but i had to use a lamp.

group project with:

donal willer

abbye dahl

practical exam for PHOT 2338, done & printed in >3h

When people questioned what we were doing we lied and said it was Dave's birthday.

KFOR soldiers and members from EULEX and the Kosovo Police conducted a practical crowd and riot control exercise at Camp Vrelo Oct. 16. The exercise was part of the annual 3-day “Silver Saber” training exercise designed to improve crowd and riot control capabilities and develop coordination with the different security elements in Kosovo.

The practical exercise highlighted KFOR’s ability to respond to any incident throughout Kosovo with its airmobile CRC capabilities. It also gave the different units an opportunity to practice relieving another unit currently engaged in a CRC event, significantly enhancing KFOR’s ability to communicate between different units and operate as a team.

Practical photogrpahy feature

My page but the interview goes through out.. its a good read with some really talented ladies.

Lager size-

www.flickr.com/photos/priyasonn/3548770985/sizes/l/

Seen through my viewfinder whilst recording construction at home.

Latest car boot sale purchase.

Practical Family Knitting Illustrated - Odhams

Practical Joke (Into Mischief) and jockey Joel Rosario win the H. Allen Jerkens (Gr I) at Saratoga Racecourse 8/26/17. Trainer: Chad Brown. Owner: Klaravich Stables & William Lawrence

Very citrus-y. I almost wish I'd fussy cut the orange/yellow fabric. I might yet.

Many old houses of Lavaux used to have this convenient attic crane lift access for heavy loads (hay, wood, whatnot?). With narrow doors and windows it may also have been the only way to get large items in there. Lutry village of Lavaux, canton of Vaud, Switzerland.

Some ask what is the point of High Dynamic Range photography or how it works. Here's an over-the-top example for you.

The first shot shows an exposure designed to give you the important foreground details for the combine harvester and the figure. However, it is very bright so the camera can't show us much of the background and sky (ie what your human eye is admiring in reality)

So we combine three different exposures at three different f-stops in order to see what is in the sky and background fields... and hey-presto (or is that HAY-Presto?) we can see what's going on.

Admittedly I might have gone a bit OTT on the tone-mapping here.... he he.

this is crappy. i want my real camera back.