ABSTRACT

Firstly, original poly(vinyl alcohol-co-ethylene) (PVA-co-PE)/cellulose composite membranes were prepared and characterized. Then these composite membranes were applied for wastewater treatment. For this purpose, separation of Iron (III) and Copper (II) ions from the aqueous solutions with stirred ultrafiltration cell was investigated. These metal ions were complexed by using alginic acid for enhancing the retention. The effects of pH and concentration on per cent retention and flux were investigated. Ultrafiltration of Iron (III) and Copper (II) solutions were done at chosen parameters. It has been found that these composite membranes can be used in ultrafiltration processes up to 45 psi pressure. The maximum retention was found as 77% for 0.75 × 10⁻⁴ M Copper (II) solutions at a velocity of 300 rpm, pressure of 45 psi, pH of 4 in the presence of alginic acid by using 5.25% (w/v) (PVA-co-PE)/cellulose composite membranes.

摘要

首先，制备并表征了原始的聚乙烯醇-乙烯-聚乙烯（PVA-co-PE）/纤维素复合膜。然后将这些复合膜用于废水处理。为此，研究了用搅拌超滤池从水溶液中分离铁（III）和铜（II）离子的方法。通过使用藻酸使这些金属离子络合以提高保留率。研究了pH和浓度对保留百分率和通量的影响。铁（III）和铜（II）溶液的超滤在选定参数下进行。已经发现，这些复合膜可用于高达45 psi压力的超滤过程中。0.75×10 ^-4的最大保留率为77％ 通过使用5.25％（w / v）（PVA-co-PE）/纤维素复合膜，在藻酸存在下以300 rpm的速度，45 psi的压力，pH值为4的M铜（II）溶液。