Journal of Chemical Engineering & Process Technology
Open Access

Wetsus Academy, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 Ma Leeuwarden, Netherlands

Biography

Henk Miedema first task as chairman of a preparatory committee was to merge 43 polders into one water board. He would become the first chairman of the new water board. He held this position for 26 years. On 1 September 1992 he was succeeded by Jan Oosterbaan . Miedema was also chairman of the Frisian Association of Water Boards for many years. At his departure, a new wave of mergers emerged. In his opinion, the distance between farmer and water board should not be too great. He preferred dividing Friesland into five water boards.

Publications

• Research Article   
  Ionic Liquid-Based Process Development for Cobalt Recovery from Aqueous Streams
  Author(s): Enas A. Othman*, Aloijsius G.J. Van der Ham, Henk Miedema and Sascha R.A. Kersten
  
  Using the ionic liquid [P8888 +][Oleate-], liquid-liquid extraction has been studied to recover Co2+ from water. Extractionregeneration experiments were followed during five consecutive cycles with Na2CO3(aq) as regeneration solution. Over 99% of Co2+ was extracted and using 0.7-1 M Na2CO3(aq) the extracted Co2+ was recovered for 99% in the form of CoCO3(s). Co2+ transfer shifted from ion-pair extraction in the first cycle to ion-exchange in the successive cycles. Thus, the measurement of a single extraction–regeneration cycle is not sufficient to perceive conclusive information about the steady-state conditions of the process. In the context of the feasibility of the technology, four key aspects are addressed: extraction efficiency, recovery of the IL, loss o.. View More»
  DOI: 10.35248/2157-7048.19.10.397

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