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Effects of pH and Competing Anions on the Solution Speciation of Arsenic by Ion Exchange Resins

作者:科技文献资料网 时间:2018-10-19 21:06:46  浏览:8418   来源:科技文献资料网
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[唯一标识符]:CDSTIC.DOE.826422
[文献来源]:美国能源部报告数据库
[文献类型]:科技报告
[资源原始索取号]:OSTI ID: 826422
[标题]:Effects of pH and Competing Anions on the Solution Speciation of Arsenic by Ion Exchange Resins
[作者]:Impellitteri, Christopher A.; Ryan, JAmes A.; Al-Abed, Souhail R.; Scheckel, Kirk G.; Randall, Paul M.; Richardson, Collin A.
[机构]:U.S. Environmental Protection Agency, Cincinnati, OH; Morehouse College, Atlanta, GA (US)
[文摘]:Anion-exchange resins (AER) are used to differentiate As(V) and As(III) by retaining As(V) and allowing As(III) to pass through. AERs allow rapid speciation of As in the field which precludes the effects of sample preservation on As speciation. Aqueous environmental samples contain anions that may interfere with the speciation of As. This study compares the speciation of As by two commercially available AERs. A silica-based AER was selected for further study. As(V) and As(III) were passed through the AER in the presence of NO3 -, SO4 2-, HPO4 2-, Cl- and HCO3 - at pH 4, 6 and 8. Recoveries of As species in mixed systems range between 90 to 100%. Breakthrough curves for As(V) are presented which allow calculation of loading rates. HPO4 2- has the greatest effect on the speciation of As by AER.
[关键词]:37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; ANIONS; ARSENIC; ION EXCHANGE; LOADING RATE; PRESERVATION; RESINS
[出版时间]:2003 Mar 26
[出版年份]:2003
[主办机构]:Sponsor not identified (US)
[来源]:Conference
[来源关系]:Conference: 225th American Chemical Society Meeting, New Orleans, LA (US), 03/23/2003--03/27/2003; Other Information: PBD: 26 Mar 2003
[国别]:United States
[总页数]:6


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[文献类型]:科技报告
[标题]:Relaxation of Vibrationally Excited HCl in Solid Xe,
[作者]:weitz,eric krueger,herman
[机构]:Northwestern Univ.,Evanston,IL. Dept. of Chemistry.*Army Research Office,Research Triangle Park,NC.
[关键词]:hydrochloric acid,molecular vibration,relaxation time,freezing,liquid phases,liquids,rates,ratios,relaxation,solid phases,solutions(general),xenon,reprints,solidified gases,ntisdodxr,ntisdoda,ntisnsfg
[出版年份]:1986
[报告时间]:6Sep 85,
[页码]:9p
[馆藏索取号]:AD-A163791
[总页数]:9


[唯一标识符]:CDSITC.AEROSPACE.A79-40015
[文献来源]:美国航空航天数据库(aerospace);国际航宇文摘(IAA)
[资源原始索取号]:A79-40015
[标题]:Coriolis force and work
[文摘]:(energy transport in atmospheric circulation)
[出版时间]:1979
[出版年份]:1979
[馆藏索取号]:A79-40015



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