Download PDF by Robert Mournighan, Marzenna R. Dudzinska, John Barich,: Chemistry for the Protection of the Environment 4

By Robert Mournighan, Marzenna R. Dudzinska, John Barich, Marjorie A. Gonzalez, Robin K. Black

ISBN-10: 0387230203

ISBN-13: 9780387230207

ISBN-10: 0387274480

ISBN-13: 9780387274485

Those complaints supply a discussion board for chemical scientists and engineers devoted to creating a purifier, more fit global for everybody. They conceal quite a lot of comparable matters equivalent to environmental tracking, wastewater remedy, and sludge administration.

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Additional info for Chemistry for the Protection of the Environment 4 (Environmental Science Research)

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I n — r J . . i_ i — — '"^ ^^ j { 0 aco^—HH^—i -: uC T3 1> > 3 E ^ ~lpo^ ' ^ a. '-! c i i > ^ c h ^ «/^ r T ! 1 ! " • : Tfl^/e 5. Effect of sodium chloride and sodium sulfate on the removal of arsenite. 4 45 Removal of dilute arsenite In this work, the column performances were examined by supplying 1 mM of arsenic species, which corresponds to 75 ppm of arsenic. Such a high level arsenic is rarely found in surface water. Since the highest concentration levels of arsenic in well water of Ganges Delta are ca.

After the elution operation, the column was washed with water for the next adsorption operation of arsenite. 3. 1 Behavior of Zr(IV)-loadecI CRP200 in adsorption of phosphate species Since properties of both phosphate and arsenate are very similar each other, the adsorption of phosphate was examined prior to the adsorption of arsenic species. Here, the feeding solution in the adsorption operation was 1 mM phosphate solution of pH3. Table 1 summarizes detailed experimental conditions and column performances during repeated adsorption-elutionregeneration cycles.

Volume of each fraction was 5 BV for the adsorption operation and 4 BV for the elution operation. However, column effluents in regeneration operations were not analyzed. 2 Method (ii): The only difference from the method (i) was in the regeneration operation. 5 M sulfuric acid (15 BV) and water (20 BV) in successive at SV 10 h"^ The adsorption and elution operations were almost the same as those in the method (i). 4 Column operation for adsorption and elution of arsenate and arsenite All procedures for removal of the arsenate were conducted by the method (ii).

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Chemistry for the Protection of the Environment 4 (Environmental Science Research) by Robert Mournighan, Marzenna R. Dudzinska, John Barich, Marjorie A. Gonzalez, Robin K. Black

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