用废物制备无机高分子絮凝剂及其在印钞废水处理中的应用

Study on the Preparation of IPFs Using Waste Materials and its Application on Banknote Printing Wastewater Treatment

基于"以废治废"理念,以一种含铝酸性废水为主要原料,制备了一种新型无机高分子絮凝剂聚硅硫酸盐,并用之处理印钞超滤浓缩废水。实验结果表明,在最佳投药量为140 mL/L的条件下,印钞超滤浓缩废水的色度和COD去除率分别达到98%和89.88%,实验表明废水温度的提高有利于COD的去除。对絮凝剂的FTIR表征说明,该絮凝剂并非各种原料组分简单的混合,而是形成了新的高分子聚合物。

Based on the concept of ＂waste control by waste＂, a new kind of inorganic polymeric flocculants （IPFs） ---polymeric silicon sulfate metal ions salt was prepared in our lab using a certain kind of Al3＋ contained wastewater. The polymeric silicon sulfate metal ions salt flocculant was used to treat ultra filtration （UF） consented banknote printing wastewater, and experimental results showed that at the optimal dose of 140 mL/L, the removal rate of colour and COD of wastewater were 98% and 89.88%, respectively. Experimental results also demonstrated that enhancing the wastewater＇s initial temperature facilitated COD removal efficiency. FTIR spectroscope was used to measure the properties of the prepared coagulant. The results of measurement showed that new kind of material had been formed.