Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination

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

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

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 11 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 KCl 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.

Original languageEnglish
Pages (from-to)4567-4575
Number of pages9
JournalEnvironmental Science and Technology
Volume46
Issue number8
DOIs
Publication statusPublished - 2012 Apr 17

Fingerprint

Osmosis
Fertilizers
Desalination
osmosis
desalination
fertilizer
Nutrients
Water
Food
nutrient
Fluxes
Osmotic Pressure
water
nutrient loss
Fertilization
Phosphorus
urea
Prescriptions
Urea
Potassium

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Phuntsho, S., Shon, H. K., Majeed, T., El Saliby, I., Vigneswaran, S., Kandasamy, J., ... Lee, S. (2012). Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination. Environmental Science and Technology, 46(8), 4567-4575. https://doi.org/10.1021/es300002w

Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination. / Phuntsho, Sherub; Shon, Ho Kyong; Majeed, Tahir; El Saliby, Ibrahim; Vigneswaran, Saravanamuthu; Kandasamy, Jaya; Hong, Seungkwan; Lee, Sangyoup.

In: Environmental Science and Technology, Vol. 46, No. 8, 17.04.2012, p. 4567-4575.

Research output: Contribution to journalArticle

Phuntsho, S, Shon, HK, Majeed, T, El Saliby, I, Vigneswaran, S, Kandasamy, J, Hong, S & Lee, S 2012, 'Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination', Environmental Science and Technology, vol. 46, no. 8, pp. 4567-4575. https://doi.org/10.1021/es300002w
Phuntsho S, Shon HK, Majeed T, El Saliby I, Vigneswaran S, Kandasamy J et al. Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination. Environmental Science and Technology. 2012 Apr 17;46(8):4567-4575. https://doi.org/10.1021/es300002w
Phuntsho, Sherub ; Shon, Ho Kyong ; Majeed, Tahir ; El Saliby, Ibrahim ; Vigneswaran, Saravanamuthu ; Kandasamy, Jaya ; Hong, Seungkwan ; Lee, Sangyoup. / Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination. In: Environmental Science and Technology. 2012 ; Vol. 46, No. 8. pp. 4567-4575.
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