Advanced modified polyacrylonitrile (PAN) membrane with high adsorption property for heavy metal ions was designed and fabricated for the first time. The introduced diazoresin-ethylenediaminetetraacetic acid (DR-EDTA) layer could effectively absorb the metal ion, such as Cu²⁺, Pb²⁺, Hg²⁺ in the waste water. The effects of layers, metal ion concentration, pH, temperature and cycle time were investigated. The results showed that the adsorption isotherms for Cu²⁺ were well fitted by Langmuir model. The maximum adsorption capacity of the modified membrane for Cu²⁺ was approximately 47.6 mg/g. In addition, the prepared PAN-(DR-EDTA)₃ membrane could be regenerated more than 720 h based on their adsorption/desorption cycles. The results demonstrated that the modified PAN membrane could be used as effective adsorbents for heavy metal removal from waste water.

中文翻译：

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具有增强的重金属离子吸附性能的高级改性聚丙烯腈膜。

首次设计并制备了对重金属离子具有高吸附性能的高级改性聚丙烯腈（PAN）膜。引入的重氮树脂-乙二胺四乙酸（DR-EDTA）层可有效吸收废水中的金属离子，如Cu 2 ⁺，Pb 2 ⁺，Hg ²⁺。研究了层，金属离子浓度，pH，温度和循环时间的影响。结果表明，Langmuir模型很好地拟合了Cu ²⁺的吸附等温线。改性膜对Cu ²⁺的最大吸附容量约为47.6 mg / g。此外，准备的PAN-（DR-EDTA）₃根据它们的吸附/解吸循环，该膜可再生超过720小时。结果表明，改性PAN膜可作为有效的吸附剂，用于去除废水中的重金属。