Studies on the Recovery of Silver from Waste Dregs
HU Zhang~1,WANG Peng~2 (1.College of Science,Zhanjiang Ocean University,Guangdong Zhanjiang 524088,China; 2.College of Science,Beijing University of Chemical Technology,Beijing 100029,China)
(1.College of Science,Zhanjiang Ocean University,Guangdong Zhanjiang 524088,China; 2.College of Science,Beijing University of Chemical Technology,Beijing 100029,China
Abstract��
The solution of silver nitrate was obtained by treating the silver-contained waste liquid and waste dregs with the solution of hydrochloric acid,transforming the sediments with the solution of potassium carbonate and potassium hydroxide,and dissolving the transformed sediments in dilute nitric acid.The solution of silver nitrate could be concentrated and crystallized or re-crystallized so as to get the solid silver nitrate,the content of which was obove 99.8%,and the amounts of impurities were complied with the national products level of analytical reagent(A.R).
2004, Vol. 21 
