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制备了新型含硼聚硅酸铝锌(B-PSAZ)无机高分子絮凝剂.利用X-射线衍射、红外光谱及扫描电镜等分析方法对絮凝剂进行了表征与分析.分析表明,硼离子的引入改善了絮凝剂的结构形态,增强了絮凝剂的吸附架桥和卷扫网捕作用,阻碍了胶粒的凝聚,从而提高了絮凝剂的稳定性.此外对B-PSAZ最优制备条件进行了研究,确定最优条件为:硅酸钠的浓度0.5 mol·L-1、n(Al)/n(Si)=2.0、n(Zn)/n(Si)=3.0、n(B)/n(Si)=0.24.最后用B-PSAZ对H-酸模拟印染废水进行絮凝处理并确定出最佳絮凝条件.结果表明,在投加量为30 mL·L-1,pH值为11的条件下,B-PSAZ处理后的H-酸模拟印染废水色度去除率达到93.5%,COD去除率达到78.5%.
A novel boron-containing polysilicate aluminum-zinc (B-PSAZ) polymer flocculant was prepared.The flocculant was characterized and analyzed by X-ray diffraction, infrared spectroscopy and scanning electron microscopy.The results showed that the boron ion The structure of flocculant was improved and the adsorption bridging and sweeping net catching effect of flocculant were enhanced and the agglomeration of colloidal particles was hindered and the stability of flocculant was improved.In addition, the optimum preparation conditions of B-PSAZ The optimum conditions were as follows: sodium silicate concentration 0.5 mol·L-1, n (Al) / n (Si) = 2.0, n (Zn) / n n (Si) = 0.24. Finally, B-PSAZ was used to flocculate H-acid simulated printing and dyeing wastewater and the optimal flocculation conditions were determined.The results showed that when the dosage was 30 mL·L-1 and pH was 11 Under the conditions, the chroma removal efficiency of H-acid simulated dyeing wastewater after B-PSAZ treatment reached 93.5% and COD removal rate reached 78.5%.