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Arsenic and fluoride removal from groundwater by reverse osmosis.
Abstract The reverse osmosis process was evaluated for removal of naturally occurring arsenic and fluoride from groundwater. Arsenic removal was affected by the prevalent arsenic species present in the water. Arsenic concentrations were reduced by approximately 60%–90% from nearly 80 ?g/L. Fluoride concentrations were reduced by approximately 60% from nearly 1.7 mg/L. *Original abstract online […]International Water Treatment
FLUORINE BALANCE AND FLUORINE EMISSION FROM CEMENT KILNS
IN THE BURINING OF PORTLAND CEMENT CLINKER THE FLUORINE IS PARTLY DRIVEN OUT OF THE RAW MATERIAL AND FUEL. IN ORDER TO ELUCIDATE THE QUESTION WHETHER THE FLUORINE IS EMITTED IN GASEOUS FORM WITH THE KILN EXIT GASES OR IS COMBINED IN SOLID FORM IN THE CLINKER OR IN THE DUST, COMPLETE FLUORINE BALANCES FOR […]International Cement Kilns
Spectrophotometric determination of fluosilicic acid in hydrofluoric acid
Abstract: A procedure is reported for the spectrophotometric determination of fluosilicic acid in commercial hydrofluoric acid. The determination of silicon as (?)a-silicomolybdic acid is carried out directly without previous separation of hydrofluoric acid. Title of Study: Studies in the spectrophotometric determination of silicon in materials decomposed by hydrofluoric acid: Spectrophotometric determination of fluosilicic acid in […]International Miscellaneous