Efficient Recycling of Copper from Waste-Printed Circuit Boards via Suspension Electrolysis Using Response Surface Methodology

2018 ◽  
Vol 144 (4) ◽  
pp. 04018020 ◽  
Author(s):  
Guisheng Zeng ◽  
Xingzhen Sui ◽  
Xiang Zhao ◽  
Zhongjun Li ◽  
Qian Guan
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards

scholarly journals Removal of organic compounds from wastewater originating from the production of printed circuit boards by UV-Fenton method

2017 ◽  
Vol 43 (4) ◽  
pp. 39-49 ◽  
Author(s):  
Maciej Thomas ◽  
Barbara Białecka ◽  
Dariusz Zdebik
Keyword(s):  
Response Surface Methodology ◽  
Wastewater Treatment ◽  
Response Surface ◽  
Organic Compounds ◽  
Printed Circuit Boards ◽  
Advanced Oxidation ◽  
Circuit Boards ◽  
Initial Value ◽  
Printed Circuit ◽  
Second Stage

AbstractThe possibility of removing organic compounds from wastewater originating from the photochemical production of printed circuit boards by use of waste acidification and disposal of precipitated photopolymer in the first stage and the UV-Fenton method in a second stage has been presented. To optimize the process of advanced oxidation, the RSM (Response Surface Methodology) for three independent factors was applied, i.e. pH, the concentration of Fe(II) and H2O2concentration. The use of optimized values of individual parameters in the process of wastewater treatment caused a decrease in the concentration of the organic compounds denoted as COD by approx. 87% in the first stage and approx. 98% after application of both processes. Precipitation and the decomposition of organic compounds was associated with a decrease of wastewater COD to below 100 mg O2/L whereas the initial value was 5550 mg O2/L. Decomposition of organic compounds and verification of the developed model of photopolymers removal was also carried out with use of alternative H2O2sources i.e. CaO2, MgO2, and Na2CO3·1,5H2O2.

LEACHING OF METALS FROM WASTE PRINTED CIRCUIT BOARDS (WPCBs) USING SULFURIC AND NITRIC ACIDS

2014 ◽  
Vol 13 (10) ◽  
pp. 2601-2607 ◽  
Author(s):  
Jae-chun Lee ◽  
Manoj Kumar ◽  
Min-Seuk Kim ◽  
Jinki Jeong ◽  
Kyoungkeun Yoo
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards
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