Adsorption of copper and chromium from electroplating wastewater with activated alumina

D. Mazumder *, D. Ghosh and P. Bandyopadhyay

Civil Engineering Department, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India



The existing wastewater treatment process has been evaluated in an Electroplating unit employing chrome and bronze plating. With a view to recycle and reuse the wastewater, adsorption process was selected as single stage treatment instead of the existing chemical methods. Consequently, wastewater was collected from chrome and bronze plating unit and analyzed for the relevant parameters. To facilitate a better option of pollution abatement the wastewater was allowed to treat by Adsorption process. Adsorbent materials such as wood charcoal, coconut shell carbon, activated carbon were not found to be effective for acceptable removal of chromium and copper as well as colour. Subsequently, Activated Alumina (AS 37 of grain size 0.6-0.9 mm) was opted and its performance was evaluated by several batch and column studies. The results revealed that the chrome and bronze plating wastewater might be combined together and the composite sample could be treated with Activated Alumina to remove chromium, copper and colour appreciably. For the existing pollution load in terms of chromium and copper, an adsorption column comprising of activated alumina has been designed following the Bed Depth Service Time (BDST) relationship.

Keywords: Chrome plating, Bronze plating, Composite wastewater, Adsorption, Activated alumina

* Corresponding author
   E-mail : inbhattacharya@rrlbhu.res.in