Selection of magnetic anion exchange resins for the removal of dissolved organic and inorganic matters.
Selection of magnetic anion exchange resins for the removal of dissolved organic and inorganic matters.
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DOI：
10.1016/s1001-0742(11)61066-8
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发表时间：
2012-11
影响因子：
6.9
通讯作者：
Qiongjie Wang;Aimin Li;Jin-nan Wang;Chengdong Shuang
中科院分区：
文献类型：
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作者：
Qiongjie Wang;Aimin Li;Jin-nan Wang;Chengdong Shuang
研究了4种磁性阴离子交换树脂对饮用水的吸附净化效果。水质的影响（pH值、温度、离子强度等）对MAER去除水中溶解性有机物（DOM）的性能进行了研究。在4种MAER中，高含水量、交换能力强的强碱型树脂NH3 -1在投加量为10 mL/L时，对水中溶解性有机碳（DOC）和紫外吸收物质的去除率最高，分别为48.9%和82.4%。MAERs还可以有效地去除无机物，如硫酸盐，硝酸盐和氟化物。结果表明，由于树脂的比紫外吸光度（苏瓦）值较高，故其对原水中DOM的去除效果优于净水。温度在6 ~ 26°C范围内对DOC的去除影响较小，36°C时对DOC的去除影响较大。pH值对絮凝剂去除DOM的效果也有一定的影响。此外，增加原水中硫酸盐浓度会降低DOC和紫外吸收物质的去除率。
Four magnetic anion exchange resins (MAERs) were used as adsorbents to purify drinking water. The effect of water quality (pH, temperature, ionic strength, etc.) on the performance of MAER for the removal of dissolved organic matter (DOM) was also investigated. Among the four studied MAERs, the strong base resin named NDMP-1 with high water content and enhanced exchange capacity exhibited the highest removal rate of dissolved organic carbon (DOC) (48.9% removal rate) and UV-absorbing substances (82.4% removal rate) with a resin dose of 10 mL/L after 30 min of contact time. The MAERs could also effectively remove inorganic matter such as sulfate, nitrate and fluoride. Because of the higher specific UV absorbance (SUVA) value, the DOM in the raw water was found to be removed more effectively than that in the clarified water by NDMP resin. The temperature showed a weak influence on the removal of DOC from 6 to 26°C, while a relatively strong one at 36°C. The removal of DOM by NDMP was also affected to some extent by the pH value. Moreover, increasing the sulfate concentration in the raw water could decrease the removal rates of DOC and UV-absorbing substances.