Leaching behavior of copper from waste printed circuit ...

@article{osti_22304621, title = {Leaching behavior of copper from waste printed circuit boards with Brønsted acidic ionic liquid}, author = {Huang, Jinxiu and Chen, Mengjun, E-mail: [email protected] and Chen, Haiyan and Chen, Shu and Sun, Quan}, abstractNote = {Highlights: • A Brønsted acidic ILs was used to leach Cu from WPCBs for the first time.

THE CYANIDE HEAP LEACHING BEHAVIOR OF CUPRIFEROUS …

4.2.6 The iron behavior 116 4.3 Conclusions 120 5 Experimental results and discussions - phase III 122 5.1 Pre-rinsing period 122 5.2 Leaching with copper cyanide solutions 125 5.2.1 Presentation of the copper behavior 125 5.2.2 The behavior of gold 130 5.2.2.1 Gold head grade 133 5.2.3 pH behavior of the effluent solution 135

Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous ...

through to other leaching processes, such as the bacterial leaching of gold sulfide concentrates, where ferric iron promotes the dissolution of pyrite and arsenopyrite [22]. In addition, numerous studies showed that leaching of chalcopyrite in chloride media results in higher copper …

Acid Leaching - Copper Ore Treatment Method

COPPER PRECIPITATION. The method for recovery of copper from leach solutions by precipitation with iron has been known for many years, being reported in use by Rio Tinto Mines in Spain as early as 1752. Scrap iron, detinned cans and sponge iron have been used depending on cost and availability.

Copper production & environmental impact - GreenSpec

• Copper is the most recycled metal after iron and aluminium • Around 40% of the demand for copper within Europe is supplied from recycled copper. • Recycling a tonne of copper uses 20% of the energy that would be used to mine and extract the same copper.

Copper Oxide Ore Leaching Ability and Cementation Behavior ...

Moreover, in order to study copper cementation by iron powder, four factors of pH, temperature, time and amount of iron powder, are optimized at three levels. Finally, it is found that increasing acid concentration, temperature and time will cause an increase in the copper recovery of ores with the leaching method.

Copper recovery using leach/solvent extraction ...

Copper recovery using leach/solvent extraction/electrowinning technology 65 (Figure 2) and a catalytic amount of LIX 63, was introduced in 19657 and in March 1968 the first commercial copper L/SX/EW operation, the Bluebird plan of Ranchers

Selective leaching - Wikipedia

Leaching of zinc. The most common example is selective leaching of zinc from brass alloys containing more than 15% zinc (dezincification) in the presence of oxygen and moisture, e.g. from brass taps in chlorine-containing water.It is believed that both copper and zinc gradually dissolve out simultaneously, and copper precipitates back from the solution.

LEACHING OF METALS INTO GROUNDWATER …

sites. Contaminants such as arsenic, iron, manganese, lead, and cadmium can dissolve from soil and waste material into groundwater in a process known as leaching. The dissolution of these metals is based on the chemistry of the water and the soil. Factors that affect metal mobility

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, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8569, Japan

A comprehensive study of the leaching behavior and ...

investigated the leaching kinetic behavior of copper from low-grade copper oxide ore. They reported that the leaching process by H2SO4 can be described with a reaction model of shrinking core, and the leaching process can be divided into three stages in the system investigated. Moreover, the leaching …

12.3 Primary Copper Smelting

12.3 Primary Copper Smelting 12.3.1 General1 Copper ore is produced in 13 states. In 1989, Arizona produced 60 percent of the total U. S. ore. Fourteen domestic mines accounted for more than 95 percent of the 1.45 megagrams (Mg)

Copper Oxide Ore Leaching Ability and Cementation …

The cementation process of copper by iron powder is provided by following eq-uation: Cu Fe Cu Fe22+++⇒+ As a result of the differences in electrochemical potentials, a reaction will take place. The reaction potential of Iron and Copper is presented in Table 3. ... Copper Oxide Ore Leaching Ability and Cementation Behavior, Mesgaran Deposit in ...

Influence of Ferric and Ferrous Iron on Chemical and ...

The effect of ferric and ferrous iron on the extraction of copper and iron from flotation concentrates including both primary and secondary copper sulfides has not been well studied as yet. Hence, this research was done to in-vestigate the effect of these cations on chemical and bac-terial leaching of Sarcheshmeh copper concentrate in the

Leaching Behavior of Copper, Zinc and Lead from ...

Leaching Behavior of Copper, Zinc and Lead from Contaminated Soil with Citric Acid Hongki Park 1,+1, Kyungbae Jung, Richard Diaz Alorro 2and Kyoungkeun Yoo 1Department of Energy and Resources Engineering, Korea Maritime University, Taejong-ro 727, Yeongdo-gu, Busan, 606-791, Korea

Bioleaching - Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt

Microbial Leaching of Uranium Ore - InTech - Open

Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University, Qaemshahr Branch Iran 1. Introduction This chapter is a review of the microbiological leaching of uranium ores. Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium's extraction.

A study on selective leaching of heavy metals vs. iron ...

The leaching of Cu, Fe, Ni, Pb, and Zn from fly ash using a variety of lixiviants at a constant temperature of 33 °C was investigated to observe the leaching behavior of various valuable, impure, and minor metals present in the ash.

Copper extraction - Wikipedia

Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.

Leaching behavior of aluminum, copper, iron and zinc from ...

Jul 15, 2019· Toxicity characteristic leaching procedure (TCLP) tests were conducted to investigate the environmental hazards associated with the leaching of aluminum (Al), copper (Cu), iron (Fe) and zinc (Zn) from fly ashes, slag, type I/II cement and cement activated fly ash and slag stabilized soils.

Influence of Ferric and Ferrous Iron on Chemical and ...

The effects of ferrous and ferric iron as well as redox potential on copper and iron extraction from the copper flotation concentrate of Sarcheshmeh, Kerman, Iran, were evaluated using shake flask leaching examinations. Experiments were carried out in the presence and absence of a mixed culture of moderately thermophile microorganisms at 50?C. Chemical leaching experiments were performed in ...

8 Microbial Leaching of Metals - Wiley-VCH

192 8 Microbial Leaching of Metals 1 Introduction Future sustainable development requires measures to reduce the dependence on non-renewable raw materials and the demand for primary resources. New resources for metals must be developed with the aid of novel tech-nologies. in addition, improvement of alredy existing mining techniques can result ...

CiNii - Copper Leaching Behavior of Iron-Oxide Hosted ...

A poor understanding of its hydrometallurgical behavior has limited the development of its commercial practice for copper extraction. In this paper, the leaching behavior of IOCG ore in sulfuric acid medium containing hydrogen peroxide were studied in shaking flask and rolling-ball (RB) vessel.