Copper, lead, zinc, antimony, and arsenic in Pakistan
Additional publication details. Copper localities that merit geological investigation are found in the western Chasai District, in North Waziristan Agency, and in the Salt Range in Mianwali and Sargodha Districts. No high-grade deposits have been .reported from these,areas and if deposits are developed they will likely be low-grade, high ...
Mechanism and kinetics of ultrasound enhanced removal of arsenic …
1.Introduction. Arsenic is a highly toxic element, which is often associated with valuable metallic minerals such as lead–zinc ore, arsenopyrite, pyrite and water-arsenic zinc ore in nature [1], [2].During mineral extraction and metallurgical processing, significant quantities of arsenic-containing slag and soot are generated [3].The high-arsenic …
A review of copper–arsenic mineral removal from
Hintikka and Leppinen (1995) tested a copper-lead–zinc ore and reported that optimum flotation of copper from this ore was at about 0 mV SHE. Tests on a copper–gold ore containing arsenopyrite indicated arsenic recovery reached a maximum at +150 mV SHE and dropped off over +200 mV SHE. Copper recovery remained high, indicating a …
Arsenic Data Sheet
World Resources: Arsenic may be obtained from copper, gold, and lead smelter flue dust, as well as from roasting arsenopyrite, the most abundant ore mineral of arsenic. Arsenic has been recovered from orpiment and realgar in China, Peru, and the Philippines; has been recovered from copper-gold ores in Chile; and was associated with gold
Characterization of zinc solubilization potential of arsenic …
In this study, experiments were conducted to isolate, characterize, and evaluate rice rhizosphere bacteria for their arsenic (As) tolerance ability and zinc (Zn) solubilization potential in culture media and soil. Among 20 bacterial isolates recovered, six were found to solubilize inorganic Zn salt(s) efficiently under in vitro culture conditions. 16S rRNA gene …
(PDF) BULK FLOTATION OF COMPLEX COPPER ORE
In zinc fine particles of copper minerals could be found. Cu++ activates zinc ore, the floatability of zinc ore is controlled by the solubility of coexisting copper ore, the surface of zinc is activated by Cu++, and then the floatability of zinc ore increases. ... zinc, and arsenic for the bulk feed and tails were carried out by TVI Pacific Inc ...
Arsenic
Arsenic is a metalloid element, which, like phosphorus, has two main forms. One is a brittle, gray metallic form and the other is a yellow, non-metallic solid. Yellow arsenic is the more reactive and unstable of the pair. Arsenic is stable, being unaffected by air, water, most acids and alkalis. Arsenic has no liquid phase; the solid sublimes ...
Separation and stabilization of arsenic in copper
This study proposes a strategy of using zinc slag to treat CSW from copper smelting. The Fe (Ⅱ) provided by the zinc slag as an in-situ iron donor is oxidized to Fe (Ⅲ) by H 2 O 2. Most of the arsenate is co-precipitated with Fe (Ⅲ), and a small amount of arsenic and ferrihydrite is fixed by complex adsorption.
Studies on the leaching of an arsenic–uranium ore
With sulfuric acid at a concentration of 180 kg/t ore, complete recovery of both uranium and arsenic was achieved giving undesirable arsenic in the leach liquor. The maximum recovery of uranium and arsenic by leaching with sodium sulfide was only 20% and 18%, respectively. However, 3 M ferric chloride leached approximately 92% U (VI) …
Arsenic
Arsenic with magnesium, manganese and zinc forms the silicate Mcgovernite. Arsenic is used with lead (0.5% As) in making lead shot. It makes the metal harder than the pure lead and improves the properties of the molten material. The shot is formed by pouring the molten material through a screen at the top of a tower and allowing it to solidify ...
Determination of arsenic speciation in secondary zinc oxide and arsenic
The species of arsenic in secondary zinc oxide generated from fuming furnace were investigated. The results revealed that there are mainly three types of secondary zinc oxide based on three arsenic species. ... Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore [J]. Transactions of Nonferrous Metals …
Beneficiation of an arsenic bearing complex sulphide ore …
Arsenic contents were less than 2000 ppm in the lead and zinc concentrates. Copper concentrate assayed 5.03% As since the major copper minerals were in tennantite form (copper arsenic sulphide ...
Methods for the Determination of Arsenic in Metallurgical …
Pillai et al. proposed a sensitive spectrophotometric method for determining arsenic in various samples, including zinc ores. The method is based on the decoloration of the pinkish-red dye Rhodamine B upon the action of iodine, which is released in the reaction of potassium iodide with arsenic in a slightly acidic medium. ... including ore …
Zinc Deficiency and Arsenic Exposure Can Act Both
In summary, zinc deficiency and arsenic exposure can function independently or cooperatively to affect zinc status, oxidant stress, and proinflammatory response. The results highlight the need to consider both nutritional status and arsenic exposures together when considering their impact on health outcomes in susceptible populations.
Lead and Zinc Smelting
the type of ore used as a charge. In the pyromet-allurgical process, ore concentrate containing lead, zinc, or both is fed, in some cases after sin-tering, into a primary smelter. Lead concentra-tions can be 50–70%, and the sulfur content of sulfidic ores is in the range of 15–20%. Zinc con-centration is in the range of 40–60%, with sulfur
Arsenic Distribution and Pollution Characteristics
Arsenic comprises about 2–5 mg kg −1 of the Earth's crust. As a compound with other elements such as oxygen, chlorine, and sulfur, arsenic is widely distributed in minerals and ores that contain copper or …
Methods for the Determination of Arsenic in …
The roasting and smelting of ores, industrial wastes, and electronic scrap and the processing of spent electrolytes and acidic mine effluents lead to the formation of …
Distribution of Arsenic in the Environment
Arsenic in Sedimentary Rocks . It should be noted that a higher than average content of arsenic is commonly found in sandstones, shales, and coals associated with uranium …
Arsenic removal from lead-zinc smelter ash by NaOH …
To clarify the chemical state of arsenic in copper ore, XAS analysis was carried out. ... Under these conditions, the leaching rates of arsenic, zinc and nickel respectively reached 94.47%, 19.90% ...
Mixed sulphide–oxide lead and zinc ores: Problems …
In Iran, mixed sulphide–oxide lead and zinc ores comprise about 10% of all the country's lead and zinc resources. There is great potential to exploit many well …
A review of copper–arsenic mineral removal from
The common copper–arsenic bearing minerals in copper ores, enargite (Cu 3 AsS 4) and tennantite (Cu 12 As 4 S 13 ), contain significant amounts of copper; 48.4% and 51.6% respectively. Removal of these minerals from the concentrate removes valuable metal, hence income. There is a dearth of literature concerning the selective removal of ...
Arsenic
Arsenic is a byproduct in smelting processes for many ores including gold, lead, cobalt, nickel, and zinc. [2] Arsenic was previously …
Hymenobacter metallilatus sp. nov., isolated from abandoned lead-zinc ore
An aerobic, non-motile, Gram-stain-negative, red-to-pinkish and rod-shaped bacterium, designated 9PBR-2 T, was isolated from an abandoned lead-zinc ore sample collected from Meizhou, Guangdong Province, PR China.Phylogenetic analyses based on 16S rRNA gene sequences showed that strain 9PBR-2 T belongs to the genus Hymenobacter and …
Sulfuric Acid Leaching of High-Arsenic Dust from Copper Smelting …
Reduction smelting has been carried out in shaft furnaces and ore-roasting furnaces [2, 3], yielding polymetallic mattes and dust with a high arsenic content. ... During leaching, an attempt was made to extract as much arsenic, zinc, and copper in the solution and obtain a cake suitable for lead production. A series of tests was performed to ...
Characterization of arsenic oxidation and uranium
Therefore, the recovery of isolates with the potent ability to resist and oxidize As from U ore might play an important role in toxic metal bioremediation including U. Keywords Uraniumore .Arsenic-resistantbacteria .Arsenicoxidation .Uraniumremoval .16SrRNAgene .Bioremediation Introduction Uranium (U) and arsenic (As) are naturally occurring ele-
Sphalerite: The primary ore of zinc and a collector's gem.
Sphalerite is the most commonly encountered zinc mineral and the world's most important ore of zinc. ... Minor amounts of manganese and arsenic can also be present in sphalerite. Sphalerite crystals: Gem-quality crystals of yellow sphalerite from the Balmat-Edwards Zinc District of New York. Specimen is about 2.75 x 1.75 x 1.5 centimeters in size.
Heterotrophic Bacterial Leaching of Zinc and Arsenic from …
Artificial adamite [Zn2(AsO4)(OH)] is a convenient structural model because it is isostructural with other rock-forming minerals in secondary ore deposits formed in cementation zones. Microbial activity in these zones accelerates mineral biogeochemical deterioration and metal release, and our results confirmed that Pseudomonas, …
Determination of arsenic speciation in secondary zinc oxide and arsenic
The species of arsenic in secondary zinc oxide generated from fuming furnace were investigated. The results revealed that there are mainly three types of secondary zinc oxide based on three arsenic species. The main phase of As is As 2 O 3 in type I, zinc arsenite (Zn (AsO 2) 2) in type II and lead arsenate (Pb (As 2 O 6 ), Pb 4 As …
The application and mechanism of iron sulfides in arsenic …
1. Introduction. Arsenic is a ubiquitous metalloid element, mainly in the form of different compounds in nature. Arsenic compounds can exist in the soil, sediments, and water and have been characterized as group 1 carcinogens by the International Agency for Research on Cancer (IARC) due to their high toxicity [1], [2].The ecotoxicological studies …
Hydrometallurgical Zinc Plants and Processes
silicate zinc ore and secondary raw materials SHG Zinc ingot L EACHING ZINC METAL RCOV Y LEACH SOLUTION AND RESIDES RE A TM N DBY-P O UC S Solution pur ifi on ... The cobalt and nickel removal process using arsenic has low zinc dust consumption, a high-quality product solution and the ability to treat solutions with high impurity levels. …
