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1. 发明申请

US20110155669A1 METHOD FOR TRACE PHOSPHATE REMOVAL FROM WATER USING COMPOSITE RESIN 审中-公开
标题翻译：使用复合树脂从水中去除磷酸盐的方法
公开(公告)号：US20110155669A1
公开(公告)日：2011-06-30
申请号：US13061521
申请日：2009-08-10
申请人： Bingcai Pan , Bingjun Pan , Qingjian Zhang , Hui Qiu , Weiming Zhang , Qing Su , Xinqing Chen , Quanxing Zhang
发明人： Bingcai Pan , Bingjun Pan , Qingjian Zhang , Hui Qiu , Weiming Zhang , Qing Su , Xinqing Chen , Quanxing Zhang
IPC分类号： C02F1/42 , C02F1/66
CPC分类号： C02F1/288 , C02F2101/105 , C02F2303/16
摘要： The invention discloses a novel method for trace phosphate removal from water by using a composite resin. Firstly, adjusting the pH value of the raw water to 5.0˜9.0 and prefiltering the water, then leading the filtrate through an absorption tower packed with the composite resin, the trace phosphate in the water is therefore absorbed onto the composite resin; stopping the absorption run when it reaches the leakage point, using a binary NaOH-NaCl solution as the regenerant of the exhausted sorbent, followed by rinsing the composite resin-filled absorption tower with saturated carbon dioxide solution to regenerate the resin. In this invention, a composite resin with nanosized hydrated ferric oxide (HFO) or hydrous manganese dioxide (HMO) particles loaded on its surface is adopted as the absorbent for enhanced phosphate removal from water. A significant decrease of phosphate content in the effluent from this treatment system is found from 0.05-20 ppm to less than 20 ppb (calculated in P), despite of the coexisting competing anions as sulfate, chloride, and hydrocarbonate at much higher molar concentrations than phosphate. This invention is characteristic of large treatment capacity and efficient regeneration for repeated use of the absorbent.
摘要翻译：本发明公开了一种利用复合树脂从水中去除痕量磷酸的新方法。首先，将原水的pH值调整至5.0〜9.0，并对水进行预过滤，然后使滤液通过填充复合树脂的吸收塔，水中的微量磷酸盐被吸收到复合树脂上; 使用二元NaOH-NaCl溶液作为排出的吸附剂的再生剂停止吸收运行，然后用饱和二氧化碳溶液冲洗复合树脂填充的吸收塔以再生树脂。在本发明中，采用纳米级水合氧化铁（HFO）或含水二氧化锰（HMO）颗粒装载在其表面上的复合树脂作为增强磷酸盐从水中除去的吸收剂。发现来自该处理系统的流出物中的磷酸盐含量显着降低，从0.05-20ppm至小于20ppb（以P计算），尽管以高于摩尔浓度的硫酸盐，氯化物和碳酸氢盐共存阴离子，磷酸盐。本发明的特征在于反复使用吸收剂的大的处理能力和有效的再生。

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