Laserfiche WebLink
• r <br /> PYR I TES+ AIR +WATER <br /> A B <br /> ACID <br /> SULFATES <br /> FERROUS - <br /> IRON <br /> + AIR r <br /> + WATER <br /> + ACID A B- <br /> A B + PYRITE <br /> + WATER <br /> FERRIC - <br /> PREC I P I TATES <br /> 4.5 > pH > 2.5 _ <br /> FERRIC SULFATES _ <br /> [Fe2(SO4)3] STRONG - <br /> OXIDANT CAPABLE of <br /> DISSOLVING a WIDE . <br /> VARIETY of SULFIDE <br /> MINERALS <br /> A— ABIOTICALLY <br /> B —DIRECT BACTERIAL ACTION <br /> Figure 1. Chemistry of Acid Formation <br />