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首页> 外文期刊>Environmental Science & Technology >Blended Fertilizers as Draw Solutions for Fertilizer-Drawn Forward Osmosis Desalination
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Blended Fertilizers as Draw Solutions for Fertilizer-Drawn Forward Osmosis Desalination

机译：混合肥料作为化肥正向渗透淡化的吸引溶液

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摘要

In fertilizer-drawn forward osmosis (FDFO) desalination, the final nutrient concentration (nitrogen, phosphorus, potassium (NPK)) in the product water is essential for direct fertigation and to avoid over fertilization. Our study with II selected fertilizers indicate that blending of two or more single fertilizers as draw solution (DS) can achieve significantly lower nutrient concentration in the FDFO product water rather than using single fertilizer alone. For example, blending KC1 and NH_4H_2PO_4 as DS can result in 0.61/1.35/1.70 g/L of N/P/K, which is comparatively lower than using them individually as DS. The nutrient composition and concentration in the final FDFO product water can also be adjusted by selecting low nutrient fertilizers containing complementary nutrients and in different ratios to produce prescription mixtures. However, blending fertilizers generally resulted in slightly reduced bulk osmotic pressure and water flux in comparison to the sum of the osmotic pressures and water fluxes of the two individual DSs as used alone. The performance ratio or PR (ratio of actual water flux to theoretical water flux) of blended fertilizer DS was observed to be between the PR of the two fertilizer solutions tested individually. In some cases, such as urea, blending also resulted in significant reduction in N nutrient loss by reverse diffusion in presence of other fertilizer species.
机译：在用肥料吸收的正渗透（FDFO）脱盐中，产品水中的最终营养物浓度（氮，磷，钾（NPK））对于直接施肥和避免过度施肥至关重要。我们对II种选择的肥料的研究表明，将两种或更多种单一肥料作为汲取溶液（DS）掺混可以显着降低FDFO产品水中的营养浓度，而不是单独使用单一肥料。例如，将KC1和NH_4H_2PO_4混合为DS可以产生0.61 / 1.35 / 1.70 g / L的N / P / K，这比单独使用它们作为DS的要低。最终FDFO产品水中的营养成分和浓度也可以通过选择含有补充营养成分且比例不同的低营养肥料来调节处方混合物来进行调节。但是，与两个单独使用的DS的总渗透压和水通量之和相比，混合肥料通常会导致总体渗透压和水通量略有降低。观察到混合肥料DS的性能比或PR（实际水通量与理论水通量之比）在两种单独测试的肥料溶液的PR之间。在某些情况下，例如尿素，在存在其他肥料种类的情况下，通过反向扩散，掺混还可以显着减少氮素养分流失。

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  • 来源
    《Environmental Science & Technology》 |2012年第8期|p.4567-4575|共9页
  • 作者

    Sherub Phuntsho; Ho Kyong Shon; Tahir Majeed; Ibrahim El Saliby; Saravanamuthu Vigneswaran; Jaya Kandasamy; Seungkwan Hong; Sangyoup Lee;

  • 作者单位

    School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007,Australia;

    School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007,Australia;

    School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007,Australia;

    School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007,Australia;

    School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007,Australia;

    School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007,Australia;

    School of Civil, Environmental and Architectural Engineering, Korea University, 1, 5-ka, Anam-Dong, Sungbuk-Gu, Seoul 136-713,Republic of Korea;

    School of Civil, Environmental and Architectural Engineering, Korea University, 1, 5-ka, Anam-Dong, Sungbuk-Gu, Seoul 136-713,Republic of Korea;

  • 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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