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Treating Ion-Exchange Waste Brines w...
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ProQuest Information and Learning Co.
Treating Ion-Exchange Waste Brines with Ferrous Chloride.
紀錄類型:
書目-語言資料,手稿 : Monograph/item
正題名/作者:
Treating Ion-Exchange Waste Brines with Ferrous Chloride./
作者:
Homan, Nathaniel Pierce.
面頁冊數:
1 online resource (43 pages)
附註:
Source: Masters Abstracts International, Volume: 57-02.
標題:
Environmental engineering. -
電子資源:
click for full text (PQDT)
ISBN:
9780355460780
Treating Ion-Exchange Waste Brines with Ferrous Chloride.
Homan, Nathaniel Pierce.
Treating Ion-Exchange Waste Brines with Ferrous Chloride.
- 1 online resource (43 pages)
Source: Masters Abstracts International, Volume: 57-02.
Thesis (M.Engr.)--University of California, Davis, 2017.
Includes bibliographical references
Ferrous chloride (FeCl2) added to chromium-laden brines produced by strong base anion exchange (SBA-IX) systems reduces hexavalent chromium [Cr(VI)] to trivalent chromium [Cr(III)] and precipitates the Cr(III) in a mixed chromium-iron hydroxide solid solution. A series of jar tests was conducted in which FeCl2 was added to synthetic SBA-IX brines. The variables investigated were initial Cr(VI) concentration, initial pH, and Fe(II):Cr(VI) stoichiometric dose ratio. This reduction-coagulation-flocculation (RCF) process was also tested on field brines with various compositions. The RCF process achieved greater than 77% chromium removal efficiency at all tested conditions, except in brines with a bicarbonate matrix. Significant vanadium and arsenic removal (>78% and >49% removal, respectively) was observed in field brines with a chloride or sulfate matrix. Diffuse double layer modeling suggests that adsorption to the precipitated solids was the predominant removal mechanism of vanadium and arsenic.
Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018
Mode of access: World Wide Web
ISBN: 9780355460780Subjects--Topical Terms:
557376
Environmental engineering.
Index Terms--Genre/Form:
554714
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Treating Ion-Exchange Waste Brines with Ferrous Chloride.
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Ferrous chloride (FeCl2) added to chromium-laden brines produced by strong base anion exchange (SBA-IX) systems reduces hexavalent chromium [Cr(VI)] to trivalent chromium [Cr(III)] and precipitates the Cr(III) in a mixed chromium-iron hydroxide solid solution. A series of jar tests was conducted in which FeCl2 was added to synthetic SBA-IX brines. The variables investigated were initial Cr(VI) concentration, initial pH, and Fe(II):Cr(VI) stoichiometric dose ratio. This reduction-coagulation-flocculation (RCF) process was also tested on field brines with various compositions. The RCF process achieved greater than 77% chromium removal efficiency at all tested conditions, except in brines with a bicarbonate matrix. Significant vanadium and arsenic removal (>78% and >49% removal, respectively) was observed in field brines with a chloride or sulfate matrix. Diffuse double layer modeling suggests that adsorption to the precipitated solids was the predominant removal mechanism of vanadium and arsenic.
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click for full text (PQDT)
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