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Mine Water and the Environment

, Volume 36, Issue 3, pp 401–408 | Cite as

Characterization of Two Nanofiltration Membranes for the Separation of Ions from Acid Mine Water

  • Oluranti Agboola
  • Touhami Mokrani
  • Emmanuel Rotimi Sadiku
  • Andrei Kolesnikov
  • Olubiyi Isola Olukunle
  • Johannes Phillippus Maree
Technical Article

Abstract

We evaluated nanofiltration for separation of ions from acid mine drainage (AMD), using two composite nanofiltration membranes (Nano-Pro-3012 and NF90) as examples of the polyamide class of acid-stable membranes. The structure of the NF membranes was characterized by scanning electron and atomic force microscopy. The NF90 displayed a higher permeate flux than Nano-Pro-3012, with higher relative roughness at both pH values. Both membranes suitably rejected most of the metals found in the AMD, but the Nano-Pro-3012 membrane proved unsuitable for sulphate removal.

Keywords

Toxic contaminants Pore size Surface roughness Solute rejection Flux 

两种分离酸性矿山废水离子的纳米渗透膜

用Nano-Pro-3012和NF90两种合成纳米膜作为酸稳定聚酰胺膜为例,评价了它们对酸性矿山废水(AMD)离子的分离效果。用扫描电镜和原子力显微镜观察NF膜结构。NF90膜比Nano-Pro-3012膜拥有更高渗透通量且在相同pH值条件下膜强度也更高。研究证明,两种膜都适于阻止酸性废水中多数金属离子通过,但Nano-Pro-3012膜更适于去除硫酸盐。

Zusammenfassung

Wir bewerteten die Nanofiltration als Methode zur Abtrennung von Ionen aus saurem Grubenwasserunter Verwendung von zwei Komposit-Nanofiltrationsmembranen (Nano-Pro-3012 and NF90) als Beispiele für säurestabile Polyamid-Membranen. Die Struktur der Nanofiltrationsmembranen wurde durch Scanning-Elektronenmikroskopie und Atomkraftmikroskopie charakterisiert. NF90 zeigte einen höheren Permeatfluss als Nano-Pro-3012 mit höherer relativer Unschärfe bei beiden pH-Werten. Beide Membranen hielten hinreichend die meisten der im sauren Grubenwasser gefundenen Metalle zurück. Nano-Pro-3012 erwies sich allerdings als ungeeignet für die Rückhaltung von Sulfat.

Resumen

Hemos evaluado la nanofiltración de iones de drenaje ácido de minas (AMD), usando 2 membranas de nanofiltración de composite (Nano-Pro-3012 y NF90) como ejemplos de membranas de poliamida resistentes a medio ácido. La estructura de las membranas NF fue caracterizada por microscopía electrónica de barrido y microscopía de fuerza atómica. La NF90 mostró un mayor flujo de permeación que Nano-Pro-3012, con mayor rugosidad relativa a ambos valores de pH. Ambas membranas rechazaron la mayoría de los metales presentes en el AMD, pero la membrana Nano-Pro-3012 mostró ser inadecuada para la remoción de sulfato.

Supplementary material

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Supplementary material 1 (DOCX 13 KB)
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Supplementary material 2 (TIF 710 KB)
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Supplementary material 3 (PDF 110 KB)
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Supplementary material 4 (PDF 131 KB)
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Supplementary material 5 (PDF 190 KB)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Oluranti Agboola
    • 1
    • 2
  • Touhami Mokrani
    • 1
  • Emmanuel Rotimi Sadiku
    • 2
  • Andrei Kolesnikov
    • 2
  • Olubiyi Isola Olukunle
    • 2
  • Johannes Phillippus Maree
    • 3
  1. 1.Department of Civil and Chemical EngineeringUniversity of South AfricaJohannesburgSouth Africa
  2. 2.Department of Chemical, Metallurgical and Materials EngineeringTshwane University of TechnologyPretoriaSouth Africa
  3. 3.Phillert TrustPretoriaSouth Africa

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