Abstract A new route of purification/revalorization of nickel electroplating wastewaters is proposed. It is shown that chemical treatment of different nickel-electroplating wastewaters with aqueous dispersion of layered structure amorphous potassium polytitanate (PPT) successfully removed the nickel from the effluents. Moreover, the resulting solid products, obtained with optimal PPT doses, showed excellent and consistent photocatalytic properties in the visible range of solar radiation, which are independent on the characteristics of the wastewater i.e. pH, nickel contents or the presence of other heavy metals. On the other hand, after proper dilution, the resulting treated effluents can be returned to the municipal wastewater collectors. The mechanisms of the processes taking place during the treatment are analyzed.

中文翻译：

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电镀镍废水在净水光触媒生产中的利用

摘要 提出了一种电镀镍废水净化/再利用的新途径。结果表明，用层状结构无定形多钛酸钾 (PPT) 的水分散体对不同的电镀镍废水进行化学处理，成功地从废水中去除了镍。此外，以最佳 PPT 剂量获得的所得固体产品在太阳辐射的可见范围内显示出优异且一致的光催化性能，这与废水的特性（即 pH 值、镍含量或其他重金属的存在）无关。另一方面，经过适当稀释后，处理后的污水可返回市政污水收集器。分析了处理过程中发生的过程的机制。