Moringa oleifera f-sand Filters for Sustainable Water Purification

Boya Xiong, Bethany Piechowicz, Ziyuhan Wang, Rose Marinaro, Emma Clement, Taylor Carlin, Adam Uliana, Manish Kumar, Stephanie Butler Velegol

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The purpose of this work is to determine parameters for the design of a Moringa seed sand filter for water purification. Moringa oleifera seeds containing cationic antimicrobial proteins have been used as natural coagulants for the removal of turbidity; however, a low removal efficiency and high residual organic levels limit their applications. In this work, Moringa seed extracts were used to reverse the charge of sand (f-sand) to 10 mV at a seed dosage of 5.6 g of seeds/m2 of sand. This f-sand filter demonstrated ∼4 log removal of 1 μm polystyrene particles and >8 log removal of Escherichia coli compared to <0.1 log removal for bare sand. Enhanced removal for particles and E. coli was dominated by attractive electrostatic interactions. Clean bed filtration modeling predicts a sticking coefficient (α) of 0.8 for f-sand compared to a value of 0.01 for bare sand. This α was further validated under a wide range of filtration conditions. Preliminary scale-up analyses suggest a point-of-use f-sand filter that requires a very small amount of seeds annually. The outcome of this work presents the scientific basis for the design of a water purification solution for developing regions, requiring only locally available resources and no use of synthetic chemicals or electricity.

Original languageEnglish (US)
Pages (from-to)38-42
Number of pages5
JournalEnvironmental Science and Technology Letters
Volume5
Issue number1
DOIs
StatePublished - Jan 9 2018

Fingerprint

Moringa oleifera
Water Purification
Purification
Seeds
Sand
filter
sand
Seed
Water
Moringa
seed
Escherichia coli
Coagulants
Electricity
Polystyrenes
Static Electricity
water purification
Turbidity
Coulomb interactions
removal

All Science Journal Classification (ASJC) codes

  • Ecology
  • Environmental Chemistry
  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Water Science and Technology

Cite this

Xiong, B., Piechowicz, B., Wang, Z., Marinaro, R., Clement, E., Carlin, T., ... Velegol, S. B. (2018). Moringa oleifera f-sand Filters for Sustainable Water Purification. Environmental Science and Technology Letters, 5(1), 38-42. https://doi.org/10.1021/acs.estlett.7b00490
Xiong, Boya ; Piechowicz, Bethany ; Wang, Ziyuhan ; Marinaro, Rose ; Clement, Emma ; Carlin, Taylor ; Uliana, Adam ; Kumar, Manish ; Velegol, Stephanie Butler. / Moringa oleifera f-sand Filters for Sustainable Water Purification. In: Environmental Science and Technology Letters. 2018 ; Vol. 5, No. 1. pp. 38-42.
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Xiong, B, Piechowicz, B, Wang, Z, Marinaro, R, Clement, E, Carlin, T, Uliana, A, Kumar, M & Velegol, SB 2018, 'Moringa oleifera f-sand Filters for Sustainable Water Purification', Environmental Science and Technology Letters, vol. 5, no. 1, pp. 38-42. https://doi.org/10.1021/acs.estlett.7b00490

Moringa oleifera f-sand Filters for Sustainable Water Purification. / Xiong, Boya; Piechowicz, Bethany; Wang, Ziyuhan; Marinaro, Rose; Clement, Emma; Carlin, Taylor; Uliana, Adam; Kumar, Manish; Velegol, Stephanie Butler.

In: Environmental Science and Technology Letters, Vol. 5, No. 1, 09.01.2018, p. 38-42.

Research output: Contribution to journalArticle

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AU - Clement, Emma

AU - Carlin, Taylor

AU - Uliana, Adam

AU - Kumar, Manish

AU - Velegol, Stephanie Butler

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