Electrochemical treatment of spent ammoniacal copper etchants

Giannopoulou, I; Panias, D

dc.contributor.author	Giannopoulou, I	en
dc.contributor.author	Panias, D	en
dc.date.accessioned	2014-03-01T02:50:04Z
dc.date.available	2014-03-01T02:50:04Z
dc.date.issued	2005	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34885
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-32044446736&partnerID=40&md5=a54c3b65bd335297558a4f59796cc1cb	en
dc.subject.other	Copper	en
dc.subject.other	Current density	en
dc.subject.other	Electrochemistry	en
dc.subject.other	Electrolytes	en
dc.subject.other	Environmental impact	en
dc.subject.other	Etching	en
dc.subject.other	Printed circuit boards	en
dc.subject.other	Ammoniacal copper etchants	en
dc.subject.other	Electrochemical treatment	en
dc.subject.other	Electrowinning	en
dc.subject.other	Spent etchants	en
dc.subject.other	Ammonia	en
dc.title	Electrochemical treatment of spent ammoniacal copper etchants	en
heal.type	conferenceItem	en
heal.publicationDate	2005	en
heal.abstract	Ammoniacal etchants are widely used in the printed circuit boards (PCBs) manufacture to etch the metallic copper from the copper clad laminates. The efficiency of the etching process is optimal for a concentration of copper in the solution ranges between 130 to 160 g/1 and declines for greater copper concentrations. Thus, the copper concentration of the solution must be restored once it becomes greater than 160 g/1 by the simultaneous removal of spent etchant and feeding by fresh solution. The disposal of spent etchant is environmentally prohibitive, while it involves a loss of copper resources. In the present work the recovery of copper by electrowinning from the spent ammoniacal copper etchant is investigated as a function of the electrolyte agitation rate and the current density. The influence of these variables on current efficiency and energy consumption is studied. The results are used in order to determine the optimum process operating conditions for the electrowinning of copper from the spent ammoniacal etching solutions.	en
heal.journalName	REWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology	en
dc.identifier.spage	1125	en
dc.identifier.epage	1134	en