AI Article Synopsis
- Electroplating produces large amounts of rinse water polluted with heavy metals, prompting the need for effective recovery methods.
- This study explores using reverse osmosis (RO) to recycle metals from simulated industrial rinse water, testing various flow rates and pressures.
- Results showed high rejection rates of contaminants like chrominum and sulfate, allowing the concentrated solution to be reused and successfully deposited as chromium layers in electroplating tests.
Article Abstract
Electroplating generates high volumes of rinse water that is contaminated with heavy metals. This study presents an approach for direct metal recovery and recycling from simulated rinse water, made up of an electroplating electrolyte used in industry, using reverse osmosis (RO). To simulate the real industrial application, the process was examined at various permeate fluxes, ranging from 3.75 to 30 L·m−2·h−1 and hydraulic pressures up to 80 bar. Although permeance decreased significantly with increasing water recovery, rejections of up to 93.8% for boric acid, >99.9% for chromium and 99.6% for sulfate were observed. The final RO retentate contained 8.40 g/L chromium and was directly used in Hull cell electroplating tests. It was possible to deposit cold-hued chromium layers under a wide range of relevant current densities, demonstrating the reusability of the concentrate of the rinsing water obtained by RO.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9505331 | PMC |
| http://dx.doi.org/10.3390/membranes12090853 | DOI Listing |
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