Optimization of the leaching process of the printed circuit boards production’s sludge for copper recovery via electrolysis

Nguyen Thi Thu Huyen, Dang Trung Dung, Nguyen Huong Giang, Nguyen Dang Binh Thanh, Mai Thanh Tung, Hoang Thi Bich Thuy


Copper is the main component of printed circuit boards (PCBs) which is the main part of an electronic device. The manufacture of PCBs often releases huge amount of sludge which contained copper. Derived from the demand of the industrial park about the wasted sludge treatment and the reducing of the plantation of natural mineral resources, the copper recovery process from PCBs manufacture's wasted sludge was studied. The process of copper leaching by sulfuric acid solution was studied using experimental planning methods using the simulation software Modde 5.0. The parameters were calculated and simulated to evaluate the effect of the acid concentration, leaching time, and the ratio between the solid and liquid phases on the leaching efficiency. The obtained results by simulation were compared with real experimental results. The obtained results from this study are planning in the actual deployment of the Hanoi Urban Environment One Member Limited Company in Vietnam.

Keywords. Printed circuit board, copper sludge, leaching.


Printed circuit board, copper sludge, leaching

Full Text:



F. Veglio, R. Quaresima, P. Foranri. Recovery of valuable metals from electronic and galvanic industrial wastes by leaching and electrowinning. Waste Management, 23, 245-252 (2003).

L. Doulakas, K. Novy, S. Stucki, Ch. Comninellis. Recovery of Cu, Pb, Cd and Zn from synthetic mixture by selective electrodeposition in chloride solution, Electrochimica Acta, 46, 349-356 (2000).

S. Silva-Martinez, S. Roy. Copper recovery from tin Striping solution: Galvanostatic deposition in a batch-recycle system, Separation and Purification Technology, 118, 6-12 (2013).

A. Lambert, P. Drogui, R. Daghrir, F. Zaviska, M.

Benzaazoua. Removal of copper in leachate from mining residues using electrochemical technology, Journal of Environmental Management, 113, 78-85 (2014).

D. Dreisinger. Copper leaching from primary sulfides: Options for biological and chemical extraction of copper, Hydrometallurgy, 83, 10-20 (2006).

I. M. Ahmed, A. A. Nayl, J. A. Daoud. Leaching and recovery of zinc and copper from brass slag by sulfuric acid, Journal of Saudi Chemical Society doi:10.1016/j.jscs.2012.11.003 (2012).

G. E. P. Box, W. G. Hunter. Multi-factor experimental design for exploring response surfaces, Journal of Mathematics and Statistics, 28, 195-241 (1957).

Display counter: Abstract : 99 views. PDF : 57 views.