| 磷酸铵镁沉淀法预处理垃圾渗滤液 |
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| 引用本文： | 王晓丹,汤琪.磷酸铵镁沉淀法预处理垃圾渗滤液[J].环境工程学报,2012,6(3):755-760. |
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| 作者姓名： | 王晓丹 汤琪 |
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| 作者单位： | 1. 重庆大学城市建设与环境工程学院,重庆400030／西南大学化学化工学院,重庆400715
2. 重庆交通大学理学院,重庆,400074 |
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| 基金项目： | 国家自然科学基金资助项目（50378095）；重庆交通大学博士基金资助项目（2009kjc-015） |
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| 摘 要： | 探讨了用磷酸铵镁沉淀法预处理垃圾渗滤液时,沉淀剂种类、pH值、物质摩尔配比和反应时间等因素对氨氮去除效果的影响。得出了处理氨氮浓度为2 677.34 mg/L的垃圾渗滤液时,在兼顾所用镁盐量尽量低和处理出水氨氮或磷酸盐的残留量都比较低的较佳实验条件为:沉淀剂种类为:MgSO4.7H2O和Na2HPO4.12H2O,反应时间为20 min,pH=9.5,n(Mg)∶n(P)∶n(N)=1.3∶1.15∶1.0。在较佳实验条件下,垃圾渗滤液的NH3-N去除率为97.05%,处理出水PO34--P含量为8.35 mg/L,NH3-N含量为75.86 mg/L。对所得沉淀物进行了成分分析和X-衍射光谱、扫描电镜表征,表明大部分沉淀物为磷酸铵镁物质。
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| 关 键 词： | 磷酸铵镁 垃圾渗滤液 氨氮 影响因素 |
Pretreatment of landfill leachate by magnesium ammonium phosphate precipitation process |
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| Wang Xiaodan and Tang Qi.Pretreatment of landfill leachate by magnesium ammonium phosphate precipitation process[J].Techniques and Equipment for Environmental Pollution Control,2012,6(3):755-760. |
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| Authors: | Wang Xiaodan and Tang Qi |
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| Institution: | 1.College of Urban Construction and Environmental Engineering,Chongqing University,Chongqing 400030,China; 2.School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China; 3.Science College,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | Landfill leachate was pretreated by magnesium ammonium phosphate(MAP) precipitation process.Some factors,such as the type of precipitants,pH,molar ratio and reaction time which affect the removal of ammonia,were discussed.When the concentration of NH3-N in the landfill leachate is 2 677.34 mg/L,the optimum treatment conditions are as follows: MgSO4·7H2O and Na2HPO4·12H2O used as precipitants,pH:9.5,n(Mg)∶ n(P)∶ n(N)∶ 1.3∶ 1.15∶ 1.0,reaction time:20 min.The removal rate of NH3-N is 97.05%,the concentrations of NH3-N and PO3-4-P in the effulent are 75.86 mg/L and 8.35 mg/L,respectively.The most sediment are confirmed as MAP by scanning microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS). |
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| Keywords: | magnesium ammonium phosphate landfill leachate ammonia-nitrogen affecting factors |
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