Purification of Water by Electroosmosis

Abstract

relationship between alpha-cellulose content and solubility in hot 10 per cent potassium hydroxide, no attempt was made to duplicate the time curves for the oxidized cellulose and hydrocellulose series.From the final results as given in Figures 2 and 3 the irregularities in the time curves do not appear to affect the relationship under investigation. The samples were evidently uniform throughout, as indicated by the agreement in analysis and also by the fact that the irregularities of the alphacellulose and potassium hydroxide solubility curves are such that these curves approximate mirror images.In Table I alpha-cellulose content for the sample which had been acid-treated for 8 hours was omitted because such treatment resulted in a product of such short fiber length that filtration was precluded.The coincidence of the relationship between alpha-cellulose content and solubility in hot 10 per cent potassium hydroxide solution to a point where the alpha-cellulose content was but 75 per cent in materials degraded by such widely different methods was an unexpected result. Since the preponderance of cellulose materials for technical use contain in excess of 75 per cent alpha-cellulose, the results give promise of wide application if combinations of oxidation and hydrocellulose formation are found to give concordant results.The divergence of these curves for more degraded materials may be due in part to the increasing difficulty in manipulation. This is especially true for alpha-cellulose determinations.Although the alpha-cellulose content when the potassium hydroxide solubility is known may be calculated from the equation, in practice, it is probably preferable to read the values directly from the curve.

Separation Strategies for Processing of Dilute Liquid Streams

“…The most recent development in this technology has involved enhanced mixing efficiency by introducing a nonuniform zeta potential, and the enhancement in mixing was experimentally observed by Herr et al [211]. In 1930, Bartow and Jebens [212] reported water purification by Electroosmosis through a diaphragm. The water so purified was claimed to be equivalent to distilled water and could be obtained at a much lower cost.…”

The Removal of Silica from Water for Boiler Feed Purposes

“…However, silica has been found in both the anode and cathode chambers which complicates the situation still further (31,56,62,73). The experimental evidence for the removal of silica by this type of apparatus is apparently inconclusive (7,70).…”