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.
Subject
Filtration and Separation,Chemical Engineering (miscellaneous),Process Chemistry and Technology
Reference58 articles.
1. Commission Regulation (EU) No. 348/2013 of 17 April 2013 amending Annex XIV to regulation (EC) No. 1907/2006 of the European parliament and of the council on the registration, evaluation, authorisation and restriction of chemicals (REACH);Off. J. Eur. Union,2013
2. Chromium as an essential nutrient: a review
3. The European Green Deal;European Commission
4. Chemical precipitation method for chromium removal and its recovery from tannery wastewater in Ethiopia
5. Chromium removal using resin supported nanoscale zero-valent iron
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