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首页> 外文期刊>Environmental Science & Technology >Modified Poly(acrylic acid)-Based Hydrogels for Enhanced Mainstream Removal of Ammonium from Domestic Wastewater
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Modified Poly(acrylic acid)-Based Hydrogels for Enhanced Mainstream Removal of Ammonium from Domestic Wastewater

机译：被改性的聚（丙烯酸）基于水凝胶，用于增强家空废水中铵的主流去除

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摘要

Rapid and continuous ammonium adsorption from mainstream coupled with side-stream ammonium recovery and adsorbent regeneration could enable ammonium recovery from domestic wastewater. This study describes the use of tailored poly(acrylic acid)-based (NaPAA) hydrogels as effective sorbents for ammonium removal from domestic wastewater. Modified NaPAA hydrogels having 60% ionization and 4.8 mol % N',N'- methylenebisacrylamide as the cross-linker reduced the overall swelling by 92% from 407 to 31 g/g because of higher cross-linking density. At hydrogel loadings of 2,5-7.5 g/L, the NaPAA hydrogels achieved ammonium concentrations of 8.3 ± 0.6 to 10.1 ± 0.1 mg/L NH_4-N, which corresponds to removal efficiencies of 53-77% after 10 min of contact time in real domestic wastewater. At the same hydrogel loadings, the ammonium removal efficiency of NaPAA hydrogels in synthetic wastewater was found to be comparable to that in real sewage (71% vs 69%, respectively), suggesting that the sorption performance is only marginally affected by organic constituents found in domestic wastewater. In addition, the NaPAA hydrogels removed 25-51% ammonium in 10 min from synthetic streams having 200-400% higher ionic strengths than those commonly observed in sewage. Furthermore, simulation studies showed that a discharge concentration of ～ 1.9 mg/L NH_4-N, well below the commonly applied discharge limits in most regions, can be achieved using mainstream ammonium removal by NaPAA hydrogels followed by biological assimilation from the growth of ordinary heterotrophic organisms.
机译：从主流加上侧流铵回收和吸附再生的快速和连续的铵吸附可以使铵从国内废水中恢复。本研究描述了使用量定制的聚（丙烯酸） - 基于（NaPAA）水凝胶作为来自国内废水中铵的有效吸附剂。随着交联剂的交联剂的整体溶胀，改性NaPaA水凝胶，具有60％电离和4.8mol％N'，N'-亚甲基双丙烯酰胺，因为交联密度较高，从407〜31g / g减少92％。在2,5-7.5g / L的水凝胶载体，NaPaa水凝胶达到8.3±0.6至10.1±0.1mg / L NH_4-N的铵浓度，其对应于10分钟接触时间后的去除效率为53-77％在真正的国内污水中。在相同的水凝胶载体中，发现了合成废水中NaPaa水凝胶的铵去除效率与实际污水（分别为71％vs 69％），表明吸附性能仅受到发现的有机成分的略微影响国内污水。此外，NaPaa水凝胶在10分钟内除去25-51％的氨基，其合成料流比污水中常见的离子强度高出200-400％。此外，仿真研究表明，使用Napaa Hydrogels的主流铵除去常见的铵，可以通过Napaa Hydrogels从普通异养生长中除去〜1.9mg / l NH_4-n的放电浓度〜1.9mg / L NH_4-n的放电浓度低于通常施加的放电限制。生物。

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  • 来源
    《Environmental Science & Technology》 |2020年第15期|9573-9583|共11页
  • 作者

    Heidy Cruz; Bronwyn Laycock; Ekaterina Strounina; Thomas Seviour; Adrian Oehmen; Ilje Pikaar;

  • 作者单位

    School of Civil Engineering The University of Queensland Brisbane Queensland 4072 Australia;

    School of Chemical Engineering The University of Queensland Brisbane Queensland 4072 Australia;

    Center for Advanced Imaging The University of Queensland Brisbane Qiieensland 4072 Australia;

    Singapore Centre for Environmental Life Sciences Engineering Nanyang Technological University 637551 Singapore;

    School of Chemical Engineering The University of Qiieensland Brisbane Queensland 4072 Australia;

    School of Civil Engineering The University of Queensland Brisbane Queensland 4072 Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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