ArsenX^np，一种新型混合（即无机/有机）吸附剂，由 SolmeteX，Inc.将铁基介质的砷亲和性与 聚合物离子交换树脂珠的坚固性。ArsenX^np由球形， 多孔聚合物阴离子交换珠，其中含有含水氧化铁纳米粒子 被均匀地、不可逆转地分散。聚合物珠粒的大小在一定范围内 直径在300到1200微米之间，通常含有约25%的元素 基于干重的铁。 ArsenX^np吸附剂利用了成熟的铁化学 与传统的离子交换工艺相结合，吸附水中的砷物种 与其他阴离子（如硫酸盐、碳酸氢盐和硝酸盐）竞争最小的水 氯化物。此外，聚合物基质的耐久性使ArsenX^np更耐用 与GFH和E33等易碎铁基吸附剂相比，操作方便。 AsNOX ^NP已由国家卫生基金会（NSF）认证饮用水。 使用并符合NSF-61标准。 最近，一种浸铁的阳离子交换吸附剂被开发出来 也已开发，但在模型水中仅显示出有限的砷容量 （DeMarco等人，2003年）。本研究的目的是进行现场和实验室研究 基于ArsenX^np的饮用水中砷去除评估 填充床系统。具体目标包括:物理化学特性 砷的性质^np；初步试验中砷可处理性的评估； 实施快速小规模柱试验（RSSCT）以模拟中试柱 表演以及几种再生方式下砷解吸的估算 并确定再生潜力。一系列实验室和现场试验 为实现上述目标，进行了基于间歇和柱实验的研究 目标。 包括38个参考文献、表格、图表。

ArsenX^np, a novel hybrid (i.e., inorganic/organic) sorbent, has been developed by SolmeteX, Inc. to combine the arsenic affinity of an iron-based media with the ruggedness of a polymeric ion exchange resin bead. ArsenX^np consists of spherical, porous, polymeric anion exchanger beads within which hydrous iron oxide nano-particles have been uniformly and irreversibly dispersed. The size of the polymeric beads ranges from 300 to 1200 microns in diameter and they typically contain around 25% elemental iron based on dry weight. The ArsenX^np sorbent utilizes well-established iron chemistry in combination with conventional ion exchange processes to adsorb arsenic species from water with minimal competition from other anions, such as sulfate, bicarbonate and chloride. Additionally, the durable nature of the polymer substrate makes ArsenX^np more convenient to handle compared to friable iron-based sorbents like GFH and E33. ArsenX^np has been certified by the National Sanitary Foundation (NSF) for potable water use and is NSF-61 compliant. Recently, an iron-impregnated cation exchange sorbent has also been developed, but showed only a limited arsenic capacity in model water (DeMarco et al. 2003). The purpose of this study was to perform field and laboratory based evaluations of ArsenX^np for the removal of arsenic from drinking waters using packed bed systems. Specific objectives included: characterization of physico-chemical properties of ArsenX^np; evaluation of arsenic treatability in pilot testings; implementation of rapid small-scale column tests (RSSCTs) to simulate pilot column performance; and, estimation of arsenic desorption under several regeneration conditions and to determine the regeneration potential. A series of laboratory and field based batch and column experiments were carried out to accomplish the above-mentioned objectives. Includes 38 references, tables, figures.