Process for treating acid mine drainage

摘要

A stream of acid mine discharge is treated by mixing an alkaline aqueous solution of sodium borohydride to form a precipitate which is separated from the stream.

主权项

1. A process for treating acid mine discharge, the process comprising:
a) providing a stream of acid mine discharge including iron, the stream having a flow rate; b) providing sodium borohydrid; c) providing a base, in sufficient quantity such that a mixture of the base, the sodium borohydride, and the stream of acid mine discharge has a pH form about 7 to about 13; d) mixing the base with the stream of acid mine discharge; e) mixing the sodium borohydride with the stream of acid mine discharge, a precipitate being formed in the mixture; and f) separating the precipitate from the stream of acid mine discharge.