Potential use of nanofiltration membranes in treatment of industrial wastewater from Ni-P electroless plating

A. Wahab Mohammad, Rizafizah Othaman, Nidal Hilal

    Research output: Contribution to journalArticle

    Abstract

    Nanofiltration (NF) membranes are a relatively new class of membranes which have properties in between those of ultrafiltration (UF) membranes and reverse-osmosis (RO) ones. Their separation mechanisms involve both steric (sieving) effects and electrical (Donnan) effects. The significance of this membrane, besides having small pores is the membrane's surface charges, which allows charged solutes that are smaller than the membrane pores to be rejected along with bigger neutral solutes and salts. Furthermore it is capable of rejecting multivalent ions effectively, and on the other hand lets the monovalent ions pass through. These are the characteristics that make the nanofiltration membrane a potential process to reject heavy metal ions, which in general are multivalent ions. In this study, the potential use of a nanofiltration membrane for rejection of heavy metal ions such as Ni2+ from wastewater from Ni-P electroless plating industry was studied. A composite NF membrane designated as HL membrane was used. The characteristics of the membranes were analyzed using single salt rejection studies of NaCl, MgCl2, Na2SO4, NiSO4. The wastewater from the Ni-P electroless plating industry was found to contain various cations such as nickel, zinc and sodium. In order to ascertain the effect of ion rejection in a multicomponent system, the rejection behaviour of Ni2+ ion in mixed solutions of Na2SO4 and NiSO4 was tested and the rejections were then compared to those obtained using real solutions. The results show that in general the rejection of Ni is high regardless of the presence of other ions. The experimental data were also analyzed using two predictive models, namely Donnan steric pore model (DSPM) and ion transport model. The models are based on the extended Nerrnst-Planck equation but solved using different approaches and parameters. The results from the models were compared to find which model gives better agreement with the experimental findings.

    Original languageEnglish (US)
    Pages (from-to)241-252
    Number of pages12
    JournalDesalination
    Volume168
    Issue number1-3
    DOIs
    StatePublished - Aug 15 2004

    Fingerprint

    Nanofiltration membranes
    Electroless plating
    Wastewater
    Ions
    membrane
    Membranes
    wastewater
    ion
    Heavy Metals
    Heavy ions
    Heavy metals
    Metal ions
    Salts
    Magnesium Chloride
    Composite membranes
    Reverse osmosis
    solute
    Ultrafiltration
    Surface charge
    Nickel

    Keywords

    • Electroless plating
    • Nanofiltration
    • Predictive models

    ASJC Scopus subject areas

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

    Cite this

    Potential use of nanofiltration membranes in treatment of industrial wastewater from Ni-P electroless plating. / Mohammad, A. Wahab; Othaman, Rizafizah; Hilal, Nidal.

    In: Desalination, Vol. 168, No. 1-3, 15.08.2004, p. 241-252.

    Research output: Contribution to journalArticle

    Mohammad, A. Wahab ; Othaman, Rizafizah ; Hilal, Nidal. / Potential use of nanofiltration membranes in treatment of industrial wastewater from Ni-P electroless plating. In: Desalination. 2004 ; Vol. 168, No. 1-3. pp. 241-252.
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