The AP reported that cellphone video shot by survivors show "blue-green puddles of acid sludge
[surrounding] corpses without heads and torsos that jut out from the earth, skeletal hands seeming to claw at the ground.
The acid sludge
at the bottom, formed from the acid treatment of oil is a black or dark brown in color and containing some harmful sulfonic acid and some impurities [11,12].
Chemical characteristics of coastal acid sulfate soil, mine site acid sulfate soil, seawater-neutralised red mud, and sewage sludge used in the Australian component of this study Parameter Coastal Mine site Bauxsol[TM] Sewage potential acid sludge
acid sulfate sulfate soil soil PH (A) 6.