铝灰制备聚硅酸铝铁絮凝剂处理制药废水
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摘要
浸取铝灰中的铝来制备聚硅酸铝铁(PAFSC)絮凝剂,用PAFSC处理制药工业废水。单因素试验优选出盐酸浸取铝灰的最佳条件:反应时间2 h,反应温度90℃,盐酸用量n(HCl)∶n(Al)=3.9∶1,盐酸浓度6 mol·L~(-1);优化条件下,铝浸取率>90%。PAFSC投加量500 mg·L~(-1),制药发酵废水色度和COD去除率分别达到81%、40%,残余COD低于1 000 mg·L~(-1),较好地去除了废水中的悬浮物,脱色效果好,絮凝后出水基本澄清。
Flocculant PAFSC was produced by leaching aluminium from aluminium ash,and it can be used to dispose the sewage in pharmaceutical industry. Through the single factor experiment,the optimum conditions to leaching aluminium ash in hydrochloric acid are: the reaction time was 2 h,the reaction temperature was 90 ℃,the dosage of hydrochloric acid was n( HCl) : n( Al) = 3. 9 ∶1,and the concentration of hydrochloric acid was 6 mol ·L~(-1),under the optimum conditions,the leaching rate of aluminium was more than 90%,the removal rate of chroma of pharmaceutical fermentation wastewater could reach to 81% and the removal rate of COD was 40% by using 500mg·L~(-1) of PAFSC. The remnant of COD was below 1 000 mg·L~(-1). Which removed the suspended solids in the wastewater well,the decolorizing effect was good,and the water is nearly clarification after flocculation.
Flocculant PAFSC was produced by leaching aluminium from aluminium ash,and it can be used to dispose the sewage in pharmaceutical industry. Through the single factor experiment,the optimum conditions to leaching aluminium ash in hydrochloric acid are: the reaction time was 2 h,the reaction temperature was 90 ℃,the dosage of hydrochloric acid was n( HCl) : n( Al) = 3. 9 ∶1,and the concentration of hydrochloric acid was 6 mol ·L~(-1),under the optimum conditions,the leaching rate of aluminium was more than 90%,the removal rate of chroma of pharmaceutical fermentation wastewater could reach to 81% and the removal rate of COD was 40% by using 500mg·L~(-1) of PAFSC. The remnant of COD was below 1 000 mg·L~(-1). Which removed the suspended solids in the wastewater well,the decolorizing effect was good,and the water is nearly clarification after flocculation.
引文
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[10]李向东,冯启言,于洪锋.气浮—水解—好氧工艺处理制药废水[J].环境工程,2005,23(3):17-18.
[2]宋力.絮凝剂在水处理中的应用与展望[J].工业水处理,2010,30(6):4-7.
[3]袁斌,吕松,朱素芳.聚合硅酸铝铁絮凝剂的研究动态[J].硅铝化合物,2003(4):12.
[4]陈国斌,唐课文,朱政兵.聚硅酸氯化铝铁絮凝剂的研制和应用[J].湖南理工学院学报:自然科学版,2003,16(4):47-49.
[5]景红霞,李巧玲,王亚昆,等.从粉煤灰中制备聚硅酸铝铁絮凝剂及应用研究[J].化学工程师,2006,124(1):9-11.
[6]张巍巍,郑永杰,田景芝.聚硅酸氯化铝铁絮凝剂的制备及其应用[J].化工时刊,2012,26(11):23-26.
[7]高秀美,依守志,王青臣.聚硅酸氯化铝铁絮凝剂的合成及其特性[J].水资源保护,2007,23(3):77-79.
[8]俞尚清,潘志彦,钱小飞,等.聚硅酸氯化铝铁絮凝剂制备及絮凝效果的研究[J].环境污染与防治,2004,26(2):121-123.
[9]刘明华,张宏.一种复合絮凝剂的絮凝性能及应用研究[J].化学研究与应用,2003,15(4):475-478.
[10]李向东,冯启言,于洪锋.气浮—水解—好氧工艺处理制药废水[J].环境工程,2005,23(3):17-18.