采用氧化钙、三氯化铁和斜发沸石对垃圾渗滤液进行联合处理。
A combined treatment of landfill leachate using calcium oxide, ferric chloride and clinoptilolite.
机构信息
Advanced Energy Ltd., Zagreb, Croatia.
出版信息
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2011;46(3):323-8. doi: 10.1080/10934529.2011.539118.
The aim of this research was development of appropriate procedure for treatment of landfill leachate taken from old sanitary landfill Piskornica (Koprivnica, Croatia). Due to complex nature of the effluent a combined treatment approach was applied. Samples were treated with calcium oxide followed by ferric chloride and finally with clinoptilolite. The optimum amount of treating agents and contact time were determined. Application of calcium oxide (25 g/L, 20 min. contact time) resulted in the reduction of color, turbidity, suspended solids and ammonia for 94.50%, 96.55%, 95.66% and 21.60%, respectively, while the removal efficiency of Cr (VI), Fe, Ni, Cu, Zn and Pb was 75.00%, 95.34%, 56.52%, 78.72%, 73.02% and 100.00%, respectively. After addition of ferric chloride (570 mg Fe(3+)/L, 20 min. contact time) removal efficiency of color, turbidity, suspended solids and ammonia increased to 96.04%, 99.27%, 98.61%, and 43.20%, respectively. Removal of ammonia (81.60%) increased significantly after final adsorption onto clinoptilolite (25 g/L, 4 h contact time). Removal of COD after successive treatment with calcium oxide, ferric chloride and clinoptilolite was 64.70%, 77.40% and 81.00%, respectively.
本研究的目的是开发一种适用于处理来自旧卫生填埋场皮斯科尔尼察（克罗地亚科普里夫尼察）的垃圾渗滤液的方法。由于废水性质复杂，因此采用了组合处理方法。用氧化钙处理样品，然后用氯化铁处理，最后用斜发沸石处理。确定了最佳的处理剂用量和接触时间。应用氧化钙（25 g/L，20 min 接触时间）可将颜色、浊度、悬浮物和氨的去除率分别提高到 94.50%、96.55%、95.66%和 21.60%，而 Cr（VI）、Fe、Ni、Cu、Zn 和 Pb 的去除率分别为 75.00%、95.34%、56.52%、78.72%、73.02%和 100.00%。添加氯化铁（570 mg Fe(3+)/L，20 min 接触时间）后，颜色、浊度、悬浮物和氨的去除率分别提高到 96.04%、99.27%、98.61%和 43.20%。最后用斜发沸石（25 g/L，4 h 接触时间）吸附后，氨的去除率显著提高（81.60%）。经氧化钙、氯化铁和斜发沸石连续处理后，COD 的去除率分别为 64.70%、77.40%和 81.00%。
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