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1. 发明授权

US4405464A Process for the removal of selenium from aqueous systems 失效
标题翻译：从水性体系中除去硒的方法
公开(公告)号：US4405464A
公开(公告)日：1983-09-20
申请号：US297634
申请日：1981-08-31
申请人： Roger A. Baldwin , John C. Stauter , Donald L. Terrell
发明人： Roger A. Baldwin , John C. Stauter , Donald L. Terrell
IPC分类号： C02F1/70 , C02F1/52
CPC分类号： C02F1/705 , C02F2101/106 , Y10S210/912
摘要： A process for reducing the concentration of selenium ions in the Se(VI) oxidation state in an aqueous solution. The aqueous solution is admixed with a quantity of metallic iron. The iron reduces the selenium ions from the Se(VI) oxidation state to a lower oxidation state and then dissolves in the aqueous solution. If the pH level of the aqueous solution is above about 2.3, the selenium ions are reduced to at least the Se(IV) oxidation state and the dissolved metallic iron hydrolyses to form an iron hydroxide that precipitates. The precipitated material is separated from the aqueous solution to provide a solution having a lower concentration of selenium ions. If the pH level of the aqueous solution is below about 2.3, no iron hydrolysis is observed to occur. At least a portion of the selenium in the Se(VI) oxidation state is believed to be reduced to the elemental state. The elemental selenium then is separated from the aqueous solution to provide a solution having a lower concentration of selenium ions.
摘要翻译：一种在水溶液中降低Se（VI）氧化态硒离子浓度的方法。将水溶液与一定量的金属铁混合。铁将硒离子从Se（VI）氧化态还原成较低的氧化态，然后溶解在水溶液中。如果水溶液的pH值高于约2.3，则硒离子被还原成至少Se（IV）氧化态，溶解的金属铁水解形成沉淀的氢氧化铁。将沉淀的材料与水溶液分离以提供硒离子浓度较低的溶液。如果水溶液的pH值低于约2.3，则不会发生铁水解。硒（VI）氧化态的硒的至少一部分被认为降低到元素状态。然后将元素硒与水溶液分离，以提供硒离子浓度较低的溶液。

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