As the water becomes more alkaline, the zinc and copper precipitate out, like the standard lime treatment.
2.
"At first, ( Keeco's process ) seems more costly than ( lime treatment ), but that's not the case if you look closely at the economics, " he said.
3.
Paul Ziemkiewicz, director of the National Center for Mine Land Reclamation at West Virginia University, said he wasn't familiar with Keeco's technology but said it would have to prove better than the standard hydrated-lime treatment.
4.
Joel Chavez, a mine-remediation specialist with Montana's Bureau of Abandoned Mines, said he became interested in Keeco's process because lime treatment didn't effectively trap arsenic, which he said is " one of our big problems here ."
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