University of North Carolina at Chapel Hill, Department of Environmental Sciences and Engineering, Campus Box 7431, Chapel Hill, NC 27599-7431, USA.
Water Res. 2010 Apr;44(7):2133-40. doi: 10.1016/j.watres.2009.12.027. Epub 2009 Dec 22.
Bromide removal by anion exchange was explored for various water qualities, process configurations, and resin characteristics. Simulated natural waters containing different amounts of natural organic matter (NOM), bicarbonate, chloride, and bromide were treated with a polyacrylate-based magnetic ion exchange (MIEX) resin on a batch basis to evaluate the effectiveness of the resin for removal of bromide. While bromide removal was achieved to some degree, alkalinity (bicarbonate), dissolved organic carbon (DOC), and chloride were shown to inhibit bromide removal in waters with bromide concentrations of 100 and 300 microg/L. Water was also treated using a two-stage batch MIEX process. Two-stage treatment resulted in only a slight improvement in bromide removal compared to single-stage treatment, presumably due to competition with the high concentration of chloride which is present along with bromide in natural waters. In view of the relatively poor bromide removal results for the MIEX resin, a limited set of experiments was performed using polystyrene resins. DOC and bromide removal were compared by treating model waters with MIEX and two polystyrene resins, Ionac A-641 and Amberlite IRA910. The two polystyrene resins were seen to be more effective for bromide removal, while the MIEX resin was more effective at removing DOC.
阴离子交换法去除溴化物的研究涉及各种水质、工艺配置和树脂特性。用基于聚丙烯酸酯的磁性离子交换（MIEX）树脂在批量处理的基础上处理含有不同量天然有机物（NOM）、碳酸氢盐、氯化物和溴化物的模拟天然水，以评估树脂对去除溴化物的效果。虽然在一定程度上实现了溴化物的去除，但在溴化物浓度为 100 和 300μg/L 的水中，碱度（碳酸氢盐）、溶解有机碳（DOC）和氯化物被证明会抑制溴化物的去除。还使用两阶段批量 MIEX 工艺处理水。与单阶段处理相比，两阶段处理仅略微提高了溴化物的去除率，这可能是由于与天然水中存在的高浓度氯化物竞争所致。鉴于 MIEX 树脂对溴化物的去除效果相对较差，仅用聚苯乙烯树脂进行了有限的一组实验。通过用 MIEX 和两种聚苯乙烯树脂 Ionac A-641 和 Amberlite IRA910 处理模型水，比较了 DOC 和溴化物的去除。两种聚苯乙烯树脂在去除溴化物方面更为有效，而 MIEX 树脂在去除 DOC 方面更为有效。
