Separation behavior of As, Zn and Cd trace impurities in the deep vacuum purification process of refined lead

Cheng, Keke; Yi, Jiafei; Zha, Guozheng; Fan, Kai; Li, Zicheng; Kong, Xiangfeng; Yang, Bin; Xiong, Heng; Xu, Baoqiang; Jiang, Wenlong

doi:10.1016/j.seppur.2021.119531

Cited by 14 publications

(6 citation statements)

References 17 publications

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“…Several processes were used to remove and separate heavy metal ions from natural waters, industrial wastewater, and contaminated soil. 1 The liquid−liquid extraction, 10 cation adsorption, 6 electrochemical treatment, 11 coagulation−flocculation, 12 and biosorption 13 were reported to remove lead from aqueous solutions. In this context of separation, the aqueous two-phase system (ATPS) is more efficient than the typical liquid−liquid extraction in hydrometallurgical processes and has an intriguing possibility for use in the metal recovery process.…”

Section: Introductionmentioning

confidence: 99%

“…Lead (Pb) is a heavy metal resistant to corrosion and radiation and, thus, widely used in various industries, including semiconductors, nuclear, mining, steel, and metallurgy. − Market demand for lead has increased in the past decade due to the recent development in electronic devices, batteries, and cables . Although the mineral industry has developed a highly efficient ion-exchange resin process for lead recovery, lead is still released into the environment with wastewater and distributed in the atmosphere, soil, and water. , …”

Section: Introductionmentioning

confidence: 99%

“…Several processes were used to remove and separate heavy metal ions from natural waters, industrial wastewater, and contaminated soil . The liquid–liquid extraction, cation adsorption, electrochemical treatment, coagulation–flocculation, and biosorption were reported to remove lead from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Extraction of Lead Ions and Partitioning Behavior in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts

Aunnankat,

Pancharoen,

Kiatkittipong

et al. 2024

J. Chem. Eng. Data

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Lead ions are environmental pollutants often present in very low concentrations, which makes them difficult to detect and, thus, present problems for environmental monitoring. In this study, we examined the performance of aqueous biphasic systems based on polyethylene glycol (PEG, molecular mass of 4000 g mol −1 ) with ammonium sulfate (NH 4 ) 2 SO 4 , magnesium sulfate (MgSO 4 ), sodium sulfate (Na 2 SO 4 ), and trisodium citrate (Na 3 C 6 H 5 O 7 ) for the separation of lead(II) ions from aqueous solutions. We investigated the effects of salt types and the ratio of PEG4000 to salt on the extraction efficiency of lead(II) removal at constant temperatures of 303 K and 0.1 MPa. Additionally, we determined the cloud points (solubility equilibrium curve) and tie-lines for four ternary systems comprising PEG4000, water, and salt (either (NH 4 ) 2 SO 4 , MgSO 4 , Na 2 SO 4 , or Na 3 C 6 H 5 O 7 ) under the same conditions. A maximum lead(II) extraction efficiency of 74.4% was achieved using the PEG4000/(NH 4 ) 2 SO 4 system with a mass fraction ratio of PEG4000 to (NH 4 ) 2 SO 4 of 0.2:0.12. This outcome highlights the significant potential of utilizing aqueous biphasic systems based on PEG4000 to separate lead(II) from aqueous solutions efficiently.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extraction of Lead Ions and Partitioning Behavior in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts

Aunnankat,

Pancharoen,

Kiatkittipong

et al. 2024

J. Chem. Eng. Data

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“…Vacuum metallurgy, a process manipulating system pressure to alter the volatilization and condensation properties of substances, enables the selective separation and recovery of products (Gao et al 2021). This technique enhances the thermodynamic and kinetic conditions of the reaction system, offering a streamlined process, minimal material usage (Cheng et al 2022;Ma et al 2022), and ecofriendly operation (Yang et al 2020). Recognized as an innovative clean technology, vacuum metallurgy accommodates the treatment of diverse complex materials and hazardous waste, facilitating the clean extraction of targeted products (Yi et al 2021;Zhang et al 2023).…”

Section: Introductionmentioning

confidence: 99%

Resourceful cleaner preparation of Sb2O3 with vacuum vaporization- condensation from hazardous arsenic antimony dust

Li,

Kong,

Fan

et al. 2024

Preprint

Self Cite

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Hazardous arsenic antimony dust (HAAD), a perilous by-product with significant antimony and arsenic concentrations generated in smelters, poses a substantial environmental threat. The imperative of resource recycling and the innocuous processing of HAAD stand as prevalent challenges and pressing priorities. This study introduces an innovative vacuum vaporization-condensation technique, capitalizing on the intrinsic merits of vacuum metallurgy, to synthesize Sb2O3. ICP analysis evidenced an enhancement in the purity of the Sb2O3 product from an initial 73.96–91.35%, with a concomitant reduction in As impurities from 18.10–6.20%, and residual contaminants approximating 0.17% following a dual-phase vacuum vaporization-condensation process at divergent temperatures. XRD assessments affirmed the feasibility of direct Sb2O3 synthesis via vapor-phase migration and condensate amalgamation, achieving substantial As2O3 impurity diminution. SEM and EPMA observations underscored a homogenous particulate morphology in the refined Sb2O3. Incomplete As extraction from the refined Sb2O3 product was attributed to the persistence of (As, Sb2)O4.5, accompanied by partial Sb attrition throughout the fabrication sequence. The suboptimal partitioning efficacy of (As, Sb2)O4.5 warrants further investigation. This methodology underscores its environmental compatibility, characterized by zero gaseous effluent, absence of wastewater expulsion, and elimination of reagent usage, thereby mitigating environmental detriments and paving the way for the sustainable exploitation of HAAD.

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“…In order to achieve a better supply of indium in globalization, indium is mainly extracted from zinc ore, sublimate, and lead-containing materials, and the recovery rate is 50–60% ( Cheng et al, 2021 ; Xu et al, 2021 ). The indium resources of China rank first in the world.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Hou

Wang

et al. 2022

Front. Chem.

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Indium is a crucial material and is widely used in high-tech industries, and electrodeposition is an efficient method to recover rare metal resources. In this work, the electrochemical behavior of In3+ was investigated by using different electrochemical methods in electrolytes containing sodium and indium sulfate. Cyclic voltammetry (CV), chronoamperometry (CA), and alternating current impedance (EIS) techniques were used to investigate the reduction reaction of In3+ and the electrocrystallization mechanism of indium in the indium sulfate system. The cyclic voltammetry results showed that the electrodeposition process is irreversible. The average charge transfer coefficient a of In3+ was calculated to be 0.116 from the relationship between the cathodic peak potential and the half-peak potential, and the H+ discharge occurred at a higher negative potential of In3+. The nucleation mechanism of indium electrodeposition was analyzed by chronoamperometry. The mechanism of indium at potential steps of −0.3 to −0.6 V was close to diffusion-controlled instantaneous nucleation with a diffusion coefficient of 7.31 × 10−9 cm2 s−1. The EIS results demonstrated that the reduction process of In3+ is subject to a diffusion-controlled step when pH = 2.5 and the applied potential was −0.5 V. SEM and XRD techniques indicated that the cathodic products deposited on the titanium electrode have excellent cleanliness and purity.

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Separation behavior of As, Zn and Cd trace impurities in the deep vacuum purification process of refined lead

Cited by 14 publications

References 17 publications

Extraction of Lead Ions and Partitioning Behavior in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts

Extraction of Lead Ions and Partitioning Behavior in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts

Resourceful cleaner preparation of Sb2O3 with vacuum vaporization- condensation from hazardous arsenic antimony dust

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

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