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Chemical precipitation and biosorption treating landfill leachate to remove ammonium-nitrogen

机译：化学沉淀和生物吸附处理垃圾渗滤液去除铵态氮

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摘要

Using chemical precipitation and biosorption to recovery the NH~_4+-N from landfill leachate had been studied. Under optimum conditions of pH 10, contact time 30 min, Mg/N/P molar ratio 1:1:1 for chemical precipitation in which initial NH~_4+-N concentration of 610-640 mg/L was achieved by NH~_4+-N removals around 88 %. And using banana peels (BPs) and modified biosorbent (NMBPs) to further purify the water containing NH~_4+-N was carried out. The experimental results showed that the NMBPs can greatly improve the sorption removal for NHH~_4+-N. The pH value was an important parameter in NHH~_4+-N removal. The residue NHH~_4+-N was 4.5-5.8 mg/L, which can meet the "standard for pollution control on the landfill site of municipal solid waste" (GB16889-2008). Based on X-ray diffraction analysis, chemical precipitation filter residue was compared with commercial MAP, which showed that the precipitate has the similar crystal structure with MAP. Fourier transform infrared absorption spectrum analysis of BPs, NMBPs before and after sorption revealed the active of hydroxyl groups at the surface of BPs have been strengthened after modified; and nitrogenous groups appeared after biosorpting the NHH~_4+-N.
机译：利用化学沉淀法和生物吸附法从垃圾渗滤液中回收了NH〜_4 + -N。在最佳pH值为10的条件下，接触时间为30分钟，化学沉淀的Mg / N / P摩尔比为1：1：1，其中NH〜_4 +-的初始NH〜_4 + -N浓度为610-640 mg / L。 N去除率约为88％。并用香蕉皮（BPs）和改性生物吸附剂（NMBPs）进一步净化了含NH〜_4 + -N的水。实验结果表明，NMBPs可以大大提高NHH〜_4 + -N的吸附去除率。 pH值是去除NHH__4 + -N的重要参数。残留NHH〜_4 + -N为4.5-5.8 mg / L，符合《城市生活垃圾填埋场污染控制标准》（GB16889-2008）。通过X射线衍射分析，将化学沉淀过滤器残留物与市售MAP进行了比较，表明沉淀物具有与MAP相似的晶体结构。吸附前后的BP，NMBP的傅立叶变换红外吸收光谱分析表明，改性后BP表面的羟基活性增强。对NHH〜_4 + -N进行生物吸附后出现含氮基团。

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  • 来源
    《Clean technologies and environmental policy》 |2013年第2期|395-399|共5页
  • 作者

    Yun-nen Chen; Chun-hua Liu; Jin-xia Nie; Xian-ping Luo; Dong-shuang Wang;

  • 作者单位

    School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, People's Republic of China;

    School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, People's Republic of China;

    School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, People's Republic of China;

    School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, People's Republic of China;

    School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    landfill leachate; ammonium-nitrogen (nhh~_4+-n); chemical precipitation; adsorption;

    机译：垃圾渗滤液铵氮（nhh〜_4 + -n）;化学沉淀吸附;

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