Microwave Efficient Extraction of Manganese from Low-Grade Pyrolusite by Pyrite Reduction Acid Leaching Process

Du, Jun; Zhang, Yanqiong; Lu, Jiajia; Gao, Lei; Guo, Shu-Guang; Omran, Mamdouh; chen, jin; Chen, Guo

doi:10.2139/ssrn.4327849

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…It is considered an environmentally benign and commercially viable process since it allows for excellent metal recovery efficiency with minimal leaching medium. [105,106] Leaching and electrodeposition are simple methods for recovering heavy metals, including Pb, Cu, and Sn. However, the ability to recover Cu and Pb is reduced by standard electrodeposition.…”

Section: Electrodepositionmentioning

confidence: 99%

An overview of metals extraction and recovery from industrial wastewater sludge

Al‐Mutair,

Kumar,

Al‐Mur

et al. 2024

Can J Chem Eng

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Industrial wastewater sludge is one of the vital sources of metals, including heavy metals, valuable metals, and precise metals. Apart from metals' necessity and economic value, some are toxic and harmful to the environment. This review explores the technologies currently applied for extracting and recovering heavy metals from industrial wastewater sludge. The technologies have been explained, and the merits and demerits of methods, as reported in past investigations, have been highlighted. The salient findings of this review are that the hydrometallurgical processes using acid leaching (H2SO4, HNO3, HCl, etc.) have been considered for the metal extraction process. Metal dissolution, concentration/purification, and recovery are the main stages of hydrometallurgical processes. The selection of successive metal recovery methods depends on the concentration of metals and chemical characteristics of industrial wastewater sludge. Different metal purification and concentrations were reported, including adsorption, ion exchange solvent extraction, and so forth, while precipitation and electrodeposition were mainly applied for metal recovery from industrial wastewater sludge. In this review, the cost and economic viability of the metal recovery process are also evaluated by previous reported studies. This review may be considered a valuable source of information for environmentally friendly and cost‐effective methods for metal recovery from industrial wastewater sludge.

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Section: Electrodepositionmentioning

confidence: 99%

An overview of metals extraction and recovery from industrial wastewater sludge

Al‐Mutair,

Kumar,

Al‐Mur

et al. 2024

Can J Chem Eng

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show abstract

“…However, in recent years, the manganese grade of rhodochrosite has been continuously declining, and the cost of industrial development has also increased accordingly [7]. Therefore, the application of pyrolusite to produce EM and EMD has gradually attracted more attention from the industry and experts [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on hydrometallugical reduction leaching of pyrolusite enhanced by electric field using pyrite as reductant

Zhao,

Pan,

Yang

et al. 2024

Preprint

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In this paper, electric field as a chemical process intensification methods was utilized in the leaching experiment of manganese from pyrolusite using pyrite as reductant. The key leaching parameters under the action of electric field, such as liquid-to-solid ratio, mass ratio of pyrolusite and pyrite, H2SO4 molar concentration, stirring speed, leaching temperature, direct current density, were investigated, respectively. The results suggest the optimum parameters of liquid-to-solid ratio, mass ratio of pyrolusite and pyrite, H2SO4 molar concentration, stirring speed, leaching temperature, direct current density were 10ml/g, 10:3, 1.6mol/L, 250 r/min, 353K, 700 A/m2 under the leaching time of 3h, the manganese extraction efficiency of 96.22% was obtained, the manganese extraction rate of leaching with electric field is nearly 36% higher than that of leaching without electric field, indicating that the electric field enhanced ion migration to improve manganese leaching rate. In addition, phase analysis and morphology detection revealed that leaching slag with electric field contains less elemental sulfur and unreacted pyrolusite as well as pyrite. This further showed that the introduction of electric field promoted the high valence conversion of elemental sulfur, decreased the encapsulation effect of elemental sulfur on minerals, and led to efficient leaching of manganese.

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Microwave Efficient Extraction of Manganese from Low-Grade Pyrolusite by Pyrite Reduction Acid Leaching Process

Cited by 2 publications

References 27 publications

An overview of metals extraction and recovery from industrial wastewater sludge

An overview of metals extraction and recovery from industrial wastewater sludge

Study on hydrometallugical reduction leaching of pyrolusite enhanced by electric field using pyrite as reductant

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