公开(公告)号：US06383395B1

公开(公告)日：2002-05-07

申请号：US09477501

申请日：2000-01-04

申请人： Stephen R. Clarke ,  Richard J. Clarke ,  Roderick Murdock ,  Clive J. Butler ,  Sam Mohanta

发明人： Stephen R. Clarke ,  Richard J. Clarke ,  Roderick Murdock ,  Clive J. Butler ,  Sam Mohanta

IPC分类号： C02F128

CPC分类号： C02F1/281 ,  C02F2101/103 ,  C02F2101/12 ,  C02F2101/22 ,  C02F2201/006 ,  Y10S210/911 ,  Y10S210/913 ,  Y10S210/915

摘要： A media is used to remove species from aqueous solutions, particularly in the treatment of water to enable it to be suitable for drinking. The media includes a material selected from the group consisting of zirconium hydroxide, titanium hydroxide, hafnium hydroxide and combinations thereof. A preferred form of the media is a layer having an aspect ratio of at least 1:1, more preferably, at least about 10:1. Removed from the water are species selected from the group consisting of arsenate, selenate, chromate, borate, perchlorate, fluoride and combinations thereof. In particular arsenite (As+3) containing species are also removed from water. Arsenite may be removed from water to levels not greater than 10 parts per billion with a single exposure to the media. The media is selective for certain species over others. The arsenite component is removed despite a presence of at least one competing species selected from the group consisting of sulphate, phosphate, nitrate, bicarbonate, iron, carbonate, nitrite, silicate, sulphite, chloride, bromide and iodide. The media is preferably in powder form while used to treat water. The media may be employed in a variety of devices including cartridge type water filters and a filter press.

摘要翻译： 使用介质从水溶液中除去物质，特别是在处理水中以使其适于饮用。 介质包括选自氢氧化锆，氢氧化钛，氢氧化铪及其组合的材料。 介质的优选形式是具有至少1:1，更优选至少约10:1的纵横比的层。 从水中去除的是选自砷酸盐，硒酸盐，铬酸盐，硼酸盐，高氯酸盐，氟化物及其组合的物质。 特别是含砷物质（As + 3）的物质也从水中除去。 在暴露于介质的情况下，砷酸盐可以从水中除去不超过十亿分之十的水平。 媒体对某些物种的选择性高于其他物种。 尽管存在至少一种选自硫酸盐，磷酸盐，硝酸盐，碳酸氢盐，铁，碳酸盐，亚硝酸盐，硅酸盐，亚硫酸盐，氯化物，溴化物和碘化物的竞争物质，仍除去亚砷酸盐组分。 介质优选为粉末形式，同时用于处理水。 介质可以用于各种装置，包括筒式水过滤器和压滤机。