Reverse osmosis of concentrated calcium sulphate solutions in the presence of iron (III) ions using composite membranes
Reverse osmosis of concentrated calcium sulphate solutions in the presence of iron (III) ions using composite membranes
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DOI：
10.1016/s0011-9164(00)00161-2
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发表时间：
2000-12-20
期刊：
影响因子：
9.9
通讯作者：
Maynarovich, AA
中科院分区：
文献类型：
--
作者：
Kavitskaya, AA;Knyazkova, TV;Maynarovich, AA
研究了含Fe(III)的硫酸钙溶液反渗透过程中复合膜的分离特性，以及酸性聚电解质添加剂羧甲基纤维素钠-CMC在此条件下的影响。结果表明，在没有Na-CMC存在的情况下，膜的分离性能会因为在膜上形成沉积物而变差。Fe(III)离子是沉积的主要原因。在引入Na-CMC添加剂的过滤溶液后，人们可以观察到沉积的延迟和性质的变化。在这种情况下，检测到Na-CMC浓度对沉积物过滤性能的显著影响。实验数据表明，在酸性介质中，Na-CMC对含Fe(III)的硫酸钙溶液有稳定作用。
We investigated separation characteristics of composite membranes in the process of reverse osmosis of calcium sulphate acid solutions containing Fe (III), and the impact under these conditions of an additive of acidic polyelectrolyte, sodium carboxymethylcellulose Na-CMC. It is shown that in the absence of Na-CMC the separation properties of the membranes deteriorate owing to the formation of a deposit on them. Fe(III) ions are mainly responsible for deposition. Upon the introduction to the solution filtered of the Na-CMC additive one can observe a delay and change in the nature of deposition. In this case, substantial influence of Na-CMC concentration on the deposit filtering properties was detected. We obtained data indicating stabilizing action of Na-CMC on the calcium sulphate solution containing Fe (III) ions in the acidic medium.