Thiourea leaching gold and silver from the printed circuit ...

The present communication deals with the leaching of gold and silver from the printed circuit boards (PCBs) of waste mobile phones using an effective and less

Get Price

Leaching of metals from printed circuit boards using ionic ...

21/07/2021  Leaching of copper, cobalt, gold, and silver from printed circuit boards of waste cellular phone has been carried out using imidazolium cation-based ionic

Get Price

Leaching of metals from large pieces of printed circuit ...

22/09/2016  In the present study, the leaching of metals from large pieces of computer printed circuit boards (CPCBs) was studied. A combination of citric acid (0.5 M) and

Get Price

Leaching of Gold from the Waste Mobile Phone Printed ...

Leaching of Gold from the Waste Mobile Phone Printed Circuit Boards (PCBs) with Ammonium Thiosulphate Abhishek Tripathi 1 , Manoj Kumar 2,* , D. C. Sau 2

Get Price

Bioleaching of heavy metals from printed circuit board ...

30/11/2019  Usha B, Ashok KS, Sharma S (2017) Metal extraction from the discarded printed circuit board by leaching. Int J Chem Stud 5:614–616. Google Scholar Vestola EA

Get Price

Bioleaching of Gold from Sulfidic Gold Ore Concentrate and ...

14/11/2020  Shredded e-waste (high-grade printed circuit boards) was sourced from Total Green Recycling in Perth, Western Australia. The shredded e-waste was pulverized with

Get Price

Leaching and Adsorption of Gold from Waste Printed Circuit ...

DOI: 10.4186/EJ.2016.20.4.29 Corpus ID: 12007488. Leaching and Adsorption of Gold from Waste Printed Circuit Boards Using Iodine-Iodide Solution and Activated

Get Price

Process development for recovery of copper and precious ...

01/11/2013  A novel hydrometallurgical process was proposed for selective recovery of Cu, Ag, Au and Pd from waste printed circuit boards (PCBs). More than 99% of copper content

Get Price

CN101392325A - Method for extracting gold from waste ...

The invention provides a method for leaching gold from a deserted printed circuit board. The method comprises the specified steps: Step 1: the deserted printed

Get Price

Simple and near-zero-waste processing for recycling gold ...

04/09/2021  The potential required for a rapid leaching rate and for avoiding the reduction of gold is 950 mV (vs AgCl/Ag(KCl sat)).The 5% NaOCl consumption required for gold

Get Price

Thiourea leaching gold and silver from the printed circuit ...

The present communication deals with the leaching of gold and silver from the printed circuit boards (PCBs) of waste mobile phones using an effective and less hazardous system, i.e., a thiourea leaching process as an alternative to the conventional and toxic cyanide leaching of gold. The influence of particle size, thiourea and Fe(3+) concentrations and temperature on the leaching of gold and ...

Get Price

leaching gold from printed circuit boards thiourea

leaching gold from printed circuit boards thiourea. of hydrometallurgical process for the recovery of copper from ... of hydrometallurgical process for the recovery of copper from waste printed circuit boards Authors: ... gold) Material motion in reactor, dynamic conditions

Get Price

leaching gold from printed circuit boards thiourea

Thiourea leaching gold and silver from the printed circuit . 1. Waste Manag. 2012 Jun;32(6):120912. doi: 10.1016/j.wasman.2012.01.026. Epub 2012 Mar 3.

Get Price

leaching gold from printed circuit boards thiourea

05/12/2015  Thiourea leaching gold and silver from the printed circuit ... Jun 01, 2012 The present communication deals with the leaching of gold and silver from the printed circuit boards (PCBs) of waste mobile phones using an effective and less hazardous system, i.e., a thiourea leaching process as an alternative to the conventional and toxic cyanide leaching of gold.

Get Price

Effect of Acid Leaching Pre-Treatment on Gold Extraction ...

13/01/2021  The effect of a preliminary acid leaching for the recovery of gold by thiourea from printed circuit boards (PCBs) of spent mobile phones, was investigated. Preliminary leaching is aimed to recover copper in the leachate that would compete with gold in the successive leaching of the residue with thiourea, thus preventing the formation of the gold-thiourea complex. Two hydrometallurgical

Get Price

Leaching Gold From Printed Circuit Boards Thiourea

Leaching Gold From Printed Circuit Boards Thiourea. Reaction kinetics and thiourea removal by oone oxidation - epe.The reaction order of oonation of thiourea n was 0.11 and the reaction rate.Used for selective leaching of gold and silver from printed circuit board scrap. Waste Solder And Printed Circuit Board The Emerging. 54 J. Li X. Xu W. Liu Thiourea leaching gold and silver from the ...

Get Price

Optimizing the thiosulfate leaching of gold from printed ...

01/10/2014  An environmentally benign process involving thiosulfate leaching was developed in order to recover gold from the printed circuit boards (PCBs) of discarded mobile phone. The effect of concentration of the reagents such as thiosulfate, copper(II) and ammonia on the leaching of gold was investigated in the temperature range 20–50 °C.

Get Price

MS10 - Leaching of Gold from Printed Circuit Boards of ...

Wong Wai Kit Chan Chun Kit Theophania Lai Mak Wing Tai, Joe

Get Price

NICKEL AMMONIUM THIOSULPHATE LEACHING OF GOLD FROM

The ammonium thiosulphate leaching of gold from waste mobile phone printed circuit boards – emphasis on acid pre-treatment and nickel catalysis. 15th SAIMM Annual Student Colloquium [Mintek, Johannesburg, South Africa, 24 October 2018]. Mboko, Y.R. and Aziz, M. 2018. The effect of nickel catalysis on the thiosulphate leaching

Get Price

Current Status on Leaching Precious Metals from Waste ...

Key Words: waste printed circuit board; leaching; recovery; precious metals; analytic hierarchy process. 1. Introduction Nowadays, the amount of scrap materials generated in the process of molding and machining of printed circuit boards (PCBs) reach 100,000 tons every year in China. Taking into account PCBs from the large quantities of waste electrical and electronic products imported abroad ...

Get Price

Thiourea leaching gold and silver from the printed circuit ...

The present communication deals with the leaching of gold and silver from the printed circuit boards (PCBs) of waste mobile phones using an effective and less hazardous system, i.e., a thiourea leaching process as an alternative to the conventional and toxic cyanide leaching of gold. The influence of particle size, thiourea and Fe(3+) concentrations and temperature on the leaching of gold and ...

Get Price

Current Status on Leaching Precious Metals from Waste ...

01/01/2012  Experimental study on leaching gold in printed circuit boards scrap with thiourea. Non-Ferrous Metals Recycling and Utilization, 2006, (6): 25-27. [36] Brooy SRL, Linge HG, Walker GS. Review of gold extraction from ores, Miner. Eng. 1994, 7 (10): 1213–1241. [37] Jiang T, Xu S, Chen J. Electrochemistry of gold leaching with thiosulfate. Journal of Central South University (Science and ...

Get Price

Effect of Acid Leaching Pre-Treatment on Gold Extraction ...

13/01/2021  The effect of a preliminary acid leaching for the recovery of gold by thiourea from printed circuit boards (PCBs) of spent mobile phones, was investigated. Preliminary leaching is aimed to recover copper in the leachate that would compete with gold in the successive leaching of the residue with thiourea, thus preventing the formation of the gold-thiourea complex. Two hydrometallurgical

Get Price

Leaching Gold From Printed Circuit Boardsthiourea

Leaching Gold From Printed Circuit Boardsthiourea. uranium ore dressing equipment. China Mining Equipment Lanka China Crusher Agency. Small Scale Stone Crushing Plant. Centerless Grinding Machine Manufacturers. Pioneer 4030 Triple Roll Crusher Videos. mine crushers sweeden sbm impact. Used Iron Ore Mobile Grinder For Sale . Importance Of Slag Formation Removal In Blast Furnace.

Get Price

Bioleaching assisted foam fractionation for recovery of ...

Present work was focused on recovering gold (Au) from the printed circuit boards (PCBs) of discarded cellphone by bioleaching assisted continuous foam fractionation. First, the cyanide-producing strains of Pseudomonas putida and Bacillus megaterium were co-cultured in order to supply a high cyanide concentration in the nutrient solution for mobilizing Au from waste PCBs (WPCBs). Bioleaching ...

Get Price

Recycling gold and copper from waste printed circuit ...

24/12/2014  Recycling gold and copper from waste printed circuit boards using chlorination process ... The leaching yield of gold could reach more than 99% after a pretreatment with ball milling for 10 min when the leaching time was 90 min, the leaching temperature was 40 °C and the initial concentration of sulfuric acid was 100 g L −1. This study could contribute significantly to metallic

Get Price

Leaching of metals from printed circuit boards using ionic ...

21/07/2021  Leaching of copper, cobalt, gold, and silver from printed circuit boards of waste cellular phone has been carried out using imidazolium cation-based ionic liquids (ILs). For the studied metals, the obtaining of selective leaching obtained is reported for the first time, where acidic ionic liquids ([Bmim]HSO4 and [Hmim]HSO4) leached copper and cobalt, while basic ionic liquids ([Bmim]Cl and ...

Get Price

MS10 - Leaching of Gold from Printed Circuit Boards of ...

Wong Wai Kit Chan Chun Kit Theophania Lai Mak Wing Tai, Joe

Get Price

Current Status on Leaching Precious Metals from Waste ...

Key Words: waste printed circuit board; leaching; recovery; precious metals; analytic hierarchy process. 1. Introduction Nowadays, the amount of scrap materials generated in the process of molding and machining of printed circuit boards (PCBs) reach 100,000 tons every year in China. Taking into account PCBs from the large quantities of waste electrical and electronic products imported abroad ...

Get Price

Effective Recovery Process of Copper from Waste Printed ...

21/12/2020  This study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media. Optimum leaching conditions for copper were found by using 3.6 ...

Get Price