leaching solvents for waste pcb

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EXTRACTION OF METALS FROM THE DISCARDED PRINTED …

The waste PCB of a discarded computer used in study. It is commonly used PCB that can be easily available at the e- waste It is commonly used PCB that can be easily available at the e- waste disposal area or an electronic shops.

HYDROMETALLURGICAL PROCESS FOR EXTRACTION OF …

leach solution to remove impurities by solvent extraction, adsorption or ion-exchange, then recovery of base and precious metals from the solution by electrorefining process, chemical reduction, or …

best solvent to leach tin - tcfuwhr.org

Hydrometallurgical Recovery of Metals from Large Printed Circuit . Sep 29, 2015 To simplify the metal leaching process, large pieces of PCBs were used instead .. of the metals from the pregnant leach liquor, including solvent extraction, out using HCl because the best results were obtained using HCl.

Recycling of Electronic Wastes Research Summary Pressure ...

Vol. 63 No. 8 • JOM 29 Recycling of Electronic Wastes Research Summary Pressure Leaching of Metals from Waste Printed Circuit Boards

The Extraction of Gold from E-waste by Hydrometallurgy ...

To resolve this problem and achieve valuable metals from electrical waste, hydrometallurgy was used through leaching process and organic solvent extraction. To do this, after a specific amount of electric and electronic waste was crushed, ground, and refined, it was sampled.

Copper Extraction from the Discarded Printed Circuit Board ...

Recovery of copper from pcb leach solution by solvent extraction, Conf. Proceedings national metallurgical ... Copper Leaching Behavior from Waste Printed Circuit Board in Ammoniacal Alkaline Solution, Materials Transactions, 47(7) 1788 to 179 (2006) 5. Gramatyka P., Nowosielski R. and Sakiewicz P., Recycling of ...

Gold Recovery from Electronic Waste by Pressure Oxidation

leaching gold from electronic waste. The effects of (NH 4) 2 S 2 O 8 concentration (0.66-1.31 M), pressure (0-103 kPa) and liquid/solid ratio (15-25 mL/g) on the recovery of gold were studied in two different levels through a full factorial 23 experimental design. The optimum conditions for gold recovery were established in 0.66 M, 103 kPa and 25 mL/g for a reaction time of 5 minutes. With ...

Leaching studies for metals recovery from printed circuit ...

Leaching studies for metals recovery from printed circuit boards scrap P. C. Oliveira 1, Marta Cabral2, ... the leaching behavior of the major metals present in printed circuit boards waste is evaluated, aiming at its recycling by hydrometallurgy. Several leachants were compared (sulfuric, hydrochloric and nitric acids, at 2 M H + concentration), at temperatures of 25ºC and 90ºC and 4 hours ...

Extraction of Tin and Copper by Acid Leaching of PCBs

Extraction of Tin and Copper by Acid Leaching of PCBs Amit Chaurasia*, K ... Printed circuit board (PCB) waste is generally dumped as a landfilling or treated pyrometallurgically, which consumes enormous power, generates hazardous gases and also destroys valuable PCB components. For recycling of the compon ents, they must be separated from the printed circuit boards which is a …

Hydrometallurgical Recovery of Metals from Large Printed ...

The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process. This paper presents a promising hydrometallurgical process to recover precious metals ...

Selective recovery of gold from waste mobile phone PCBs …

The leaching of gold from the scrap mobile phone PCBs by electro-generated chlorine as an oxidant and its recovery by ion exchange process was investigated.

TCLP - Toxicity Characteristic Leaching Procedure Inc ...

TCLP - Toxicity Characteristic Leaching Procedure . In days of old, waste products were characterized as hazardous under the under the E.P. Toxicity rule. On November 7, 1986 the EPA revised the TCLP rule and promulgated (made known officially) as part of the land disposal restriction. Like the EP TOX, the TCLP rule requires that the laboratory take the solids from a sample, mix with a …

Leaching of gold, silver and accompanying metals from ...

The circuit boards (PCBs) waste were selected as an input material for testing the leaching of gold, silver and accompanying metals. The chemical composition of the applied waste is given in Tab. 1.

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

18 Abhishek Tripathi et al.: Leaching of Gold from the Waste Mobile Phone Printed Circuit Boards (PCBs) with Ammonium Thiosulphate Literature reveals that only limited studies have been carried

FACT SHEET: Polychlorinated Biphenyls (PCBs)

Title 40 CFR 761, Subpart D, Storage and Disposal, provides the regulatory requirements for storage, disposal and/or decontamination of PCB liquids, PCB items, PCB remediation wastes, PCB bulk product waste, PCB research and development waste, and PCB radioactive waste. The source of the PCBs, the concentration, and whether it is liquid or non-liquid, combine to determine the requirements ...

Leaching behavior of PCBs and PCDDs/DFs from some …

Although it is well known that some waste materials and their incinerator residues contain persistent organic pollutants (POPs) such as PCBs and PCDDs/DFs, little attention has been paid to the leaching behavior of these chemicals because of their low solubility.

Waste Printed Circuit Board (PCB) Recycling Techniques ...

With the development of technologies and the change of consumer attitudes, the amount of waste electrical and electronic equipment (WEEE) is increasing annually. As the core part of WEEE, the waste printed circuit board (WPCB) is a dangerous waste but at the same time a rich resource for various

Recovery of Copper from Bio-Leaching Solutions of Waste ...

According to the properties of bioleaching solutions of printed circuit boards (PCBs), copper(Ⅱ) in the leaching solution were recovery by solvent extraction with N902 and RE609. The influence of equilibration time,extractant concentration,O/A ratios,pH value on copper(Ⅱ) extraction and sulphuric acid concentration on copper(Ⅱ ...

Copper Leaching Behavior from Waste Printed Circuit Board ...

Copper Leaching Behavior from Waste Printed Circuit Board in Ammoniacal Alkaline Solution Kazuya Koyama 1, Mikiya Tanaka and Jae-chun Lee2 1Metals Recycling Group, Research Institute for Environmental Management Technology,

COPPER EXTRACTION FROM THE DISCARDED PRINTED CIRCUIT BOARD …

Agarwal Perween, Shubhajit Pramanik and Sahu K.K., Recovery of copper from pcb leach solution by solvent extraction, Conf. Proceedings national metallurgical laboratory, csir, jamshedpur - …

Leaching and EU Landfill Directive - intersol.fr

maybe determined either by a batch leaching test or by a percolation test under conditions approaching local equilibrium. (**) DOC: If the waste does not meet these values for DOC at its own pH value, it may

Leaching of gold and silver from printed circuit board of ...

A leaching study with solutions based on thiosulfate was performed and an extraction of 9.02g Au/ton of PCBs and 33.88g Ag/ton of PCBs was obtained, compared to characterization results using a …

ISSN Print: ISSN Online: Copper extraction from the ...

Leaching copper from shredded particles of waste printed circuit boards (PCBs) was carried out in sulphuric acid solution using hydrogen peroxide as an oxidant at room temperature. The

Leaching of Dioxins from Municipal Waste Combustor Residues

expected to leach from waste-to-energy ash disposed under controlled conditions either in combination with untreated municipal solid waste (co-disposal landfill) or in a monofill. Section 1 of this report outlines the background and objectives for this work.

RECOVERY OF COPPER FROM PCB LEACH SOLUTION BY …

RECOVERY OF COPPER FROM PCB LEACH SOLUTION BY SOLVENT EXTRACTION 1191 RESULTS AND DISCUSSION Experiments were conducted to study the effect of various parameters to ...

Hydrometallurgical Recovery of Metals from Large Printed ...

The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process. This paper presents a promising hydrometallurgical process to recover precious metals from waste PCBs. To simplify the metal leaching process, large pieces of PCBs were used instead of a

Copper Leaching Behavior from Waste Printed Circuit …

Copper Leaching Behavior from Waste Printed Circuit Board in Ammoniacal Alkaline Solution 1791 The effect of the temperature on the copper leaching from PCB was also studied.

LEACHING OF LEAD FROM SOLDER MATERIAL USED IN …

recycling of valuable metals of high commercial value following leaching, solvent extraction, ion-exchange etc. erefore, sTh incere efforts have been made world wide to develop an eco- friendly process using mechanical pretreatment in combination with hydrometallurgical technique [4]. Lee et al. [5] have reported that the metal liberation from these waste PCBs could be achieved up to 95 ...