Accumulation of GdCl3 in the feed of a reverse osmosis system during desalination as determined by neutron absorption

6th European Conference on Neutron Scattering

Schwahn, D.^1 ; Pipich, V.^2 ; Kasher, R.^3 ; Oren, Y.^3

Technische Universitat München, Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), Garching

D-85748, Germany^1

Jülich Centre for Neutron Science JCNS-FRM II, Outstation at FRM II, Garching

D-85747, Germany^2

Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, 84990, Israel^3

关键词: Concentration polarization;    Initial concentration;    Membrane surface;    Reverse osmosis systems;    Salt concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/746/1/012039/pdf
DOI  :  10.1088/1742-6596/746/1/012039

来源: IOP

【 摘 要 】

This article deals with the application of in-situ small-angle neutron scattering to investigate wastewater desalination by reverse osmosis. In a first series of experiments we take advantage of the strong neutron absorption of gadolinium (Gd) and use 0.50 g/L GdCl3in the feed as an indicator for concentration polarization and scaling at the membrane surface. The continuous decline of scattering during the process of desalination indicates an increase of GdCl3salt concentration which after 15 hours has achieved nearly 100% enhancement with respect to its initial concentration.