Nature identification and morphology characterization of cation-exchange membrane fouling during conventional electrodialysis
Nature identification and morphology characterization of cation-exchange membrane fouling during conventional electrodialysis
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DOI：
10.1016/j.jcis.2006.04.035
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发表时间：
2006-08-15
影响因子：
9.9
通讯作者：
Bazinet, Laurent
中科院分区：
文献类型：
--
作者：
Ayala-Bribiesca, Erik;Pourcelly, Gerald;Bazinet, Laurent
本工作的目的是研究的效果的浓缩溶液的pH值和组合物中的钙，碳酸盐，和蛋白质的稀溶液进行处理，通过传统的电渗析对阳离子交换膜（CENI）的污染。看来，在使用保持在pH 12的浓缩溶液对含有CaCl 2和CaCl 2 + Na 2CO 3的溶液进行脱矿质之后，在CEM的两侧上出现矿物污垢。两个表面上的沉积物的性质被确定为氢氧化钙和/或碳酸钙。矿物污垢提出了一个聚集体状晶体后，康乃馨般的图案的小菱面体晶体的聚集体与氯化钙单独添加，而CaCl 2 + Na 2CO 3产生了更平滑的球形晶体。蛋白质污染仅在CEM表面上检测到，该CEM表面与使用浓缩物pH值为2的含有CaCl 2 + Na 2CO 3的溶液的脱盐后的稀释液接触。(c)2006年爱思唯尔公司All rights reserved.
The aim of this work was to study the effect of a concentrate solution pH value and of the composition in calcium, carbonate, and protein of a diluate solution to be treated by conventional electrodialysis on the fouling of cation-exchange membranes (CENI). It appeared that after demineralization of solutions containing CaCl2 and CaCl2 + Na2CO3 using a concentrate solution maintained at a pH of 12, mineral fouling appeared on both sides of the CEM. The nature of the deposits was identified as calcium hydroxide and/or carbonate on both surfaces. The mineral fouling presented an aggregation-like crystal following a carnation-like pattern of aggregates of small rhombohedral crystals with CaCl2 added alone, while CaCb + Na2CO3 yielded a smoother spherical crystal. Protein fouling was detected only on the CEM surface in contact with the diluate after demineralization of a solution containing CaCl2 + Na2CO3 using a concentrate pH value of 2. (c) 2006 Elsevier Inc. All rights reserved.