Boron removal in new generation reverse osmosis (RO) membranes using two-pass RO without pH adjustment

Ali Farhat, Farrukh Ahmad, Nidal Hilal, Hassan A. Arafat

    Research output: Contribution to journalArticle

    Abstract

    Boron removal using new generation RO membranes from several leading manufacturers under a second-pass configuration and without pH adjustment was studied. The study was conducted using seawater from the Arabian Gulf (higher salinity and temperatures than average seawater). Membranes from several manufacturers were tested under similar operational conditions and the same feed water source. It was found that significant boron rejections, as high as 96%, were successfully achieved, using readily-available commercial RO membranes under a two-pass configuration and without any pH adjustment. Moreover, single-pass configurations exhibited high salt and boron rejection results reaching 99% and 91%, respectively. First pass permeates had boron levels below 1.4. ppm, which are adequate to comply with the new WHO guidelines (2.4. ppm) and those of other countries such as Australia, Canada, and UAE, whose boron guideline thresholds are above 1.4. ppm. The paper also assesses the influence of several operational parameters such as feed water salinity, flow velocity, temperature and feed pressure in second pass on boron removal in this process. It was found that higher boron removals were obtained with higher feed velocity, higher second-pass pressures, and lower feed temperatures.

    Original languageEnglish (US)
    Pages (from-to)50-59
    Number of pages10
    JournalDesalination
    Volume310
    DOIs
    StatePublished - Feb 1 2013

    Fingerprint

    Osmosis membranes
    Boron
    Reverse osmosis
    boron
    membrane
    Seawater
    seawater
    Water
    temperature
    removal
    reverse osmosis
    Flow velocity
    Temperature
    flow velocity
    Salts
    salt
    Membranes
    salinity

    Keywords

    • Boron rejection
    • Desalination
    • Membranes
    • Reverse osmosis
    • Two-pass systems

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)
    • Water Science and Technology
    • Mechanical Engineering

    Cite this

    Boron removal in new generation reverse osmosis (RO) membranes using two-pass RO without pH adjustment. / Farhat, Ali; Ahmad, Farrukh; Hilal, Nidal; Arafat, Hassan A.

    In: Desalination, Vol. 310, 01.02.2013, p. 50-59.

    Research output: Contribution to journalArticle

    Farhat, Ali ; Ahmad, Farrukh ; Hilal, Nidal ; Arafat, Hassan A. / Boron removal in new generation reverse osmosis (RO) membranes using two-pass RO without pH adjustment. In: Desalination. 2013 ; Vol. 310. pp. 50-59.
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