Anti-scaling properties of zinc ion and copper ion in the recycling water |
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Authors: | Liu Wenjun F Hui J Lédion Wu Xingwu |
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Institution: | 1. College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, People’s Republic China, 200092 2. Laboratoire d’Ingénierie des Matériaux (LIM) UMR CNRS 8006, (Ecole Nationale Supérieure d’Arts et Métiers) ENSAM, 151 Boulevard de l’H?pital, 75013, Paris, France
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Abstract: | This paper investigated the respective applications of zinc and copper ions as inhibitors in the recycling water. The results
show when their concentrations are not less than 0.5 mg L−1, the treated water is clear as usual. However, their scaling on the tube wall still lasts. In the solution of zinc ion, the
weight of precipitation on the tube wall always increases stably; but in the solution of copper ion, that increases less stably;
besides, when the concentration of copper ion is beyond 2 mg L−1, the increase of precipitation weight on the tube wall has become small. All of which showed different scaling mechanisms.
For the solution of zinc ion, the scaling on the tube wall increases stably because of the homogeneous germs. However, in
the solution of copper ion, the different types of copper ion germs will be adsorbed selectively by the tube wall because
of heterogeneous germs, or the part of having been adsorbed germs onto the tube wall will be washed out. |
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Keywords: | Copper ion Zinc ion Complexes Austenitic stainless steel tube Scaling |
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