| abstract |
A process for treating arsenic-containing aqueous waste is described wherein the aqueous waste, treated if necessary to minimize the presence of materials which reduce the efficiency of reverse osmosis membranes, is passed through an ultrafilter to remove solids followed by a chemical treatment to adjust the pH to range from about 6 to 8 and to add antiscalants and antifouling materials, then following to subject the chemically treated filtrate to a reverse osmosis process to result in a permeate stream having less than about 50 parts per billion arsenic. |