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首页> 外文期刊>Journal of Applied Polymer Science >batement of heavy metals and softening of hard water by the CoAlPO_4-5/Polysulfone membrane
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batement of heavy metals and softening of hard water by the CoAlPO_4-5/Polysulfone membrane

机译：CoAlPO_4-5 /聚砜膜处理重金属并软化硬水

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To improve the membrane, if CoAJPO4-5 was appropriately added, it could increase the rejection rate of metal ions compared with the PSf membrane. Besides, penetration rate would also increase, and the pressure applied could be lowered when the improved membrane was used. The optimum amount of CoAlPO4-5 added for Go:Al : P = 0.1 : 0.92: 1.0 is about 5 wt %, while for the Co : Al P = 0.08: 0.93: 1.0, this optimum value would shift toward a higher wt % because the latter has less active sites per unit weight of CoAJPO4-5. The hydrated radius of metal ion had great influence on the rejection rate. The larger the radius, for example, that of the +3 valence cations, the higher the rejection rate would exhibit, and the rate for Cd2~ was much lower because its radius was the smallest one. Moreover, although incompatibility existed in the improved membrane and the variation of applied pressure was limited, durability of this membrane under the operating conditions was good.
机译：为了改善膜性能，如果适当添加CoAJPO4-5，与PSf膜相比，它可以提高金属离子的排斥率。此外，当使用改进的膜时，渗透速率也将增加，并且施加的压力可以降低。 Go：Al：P = 0.1：0.92：1.0的最佳CoAlPO4-5添加量约为5 wt％，而Co：Al P = 0.08：0.93：1.0的最佳添加量则朝更高的wt％因为后者每单位重量的CoAJPO4-5具有较少的活性位点。金属离子的水合半径对截留率有很大影响。半径越大，例如+3价阳离子的半径越大，排斥率越高，并且由于Cd2〜的半径最小，因此Cd2〜的半径要低得多。此外，尽管在改进的膜中存在不相容性并且施加压力的变化受到限制，但是该膜在操作条件下的耐久性良好。

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