Arsenic removal from acid extraction solutions of copper smelting flue dust

An effective combined process of aeration micro-electrolysis and flocculation was utilized to treat arsenic that incoming contaminate level was 153 mgL-1 from the metallurgical effluent. Treatment mechanisms and operation conditions were discussed which influenced the removal efficiency of arsenic. Under the optimal technological conditions, it was found that the removal efficiencies of COD and As were 92.5% and 99.7% respectively. The remain arsenic concentration in the treated wastewater was only 0.43mgL-1 and met National Wastewater Discharge Standard(GB8978-1996) in China. Analysis by SEM and EDS revealed that using combined process, most of As(III) could be oxidized to As(V), which led to the high efficiency of arsenic removal. In the meantime, most of other heavy metals, such as Cu, Pb and Ni, had been removed. Therefore, the combined process is regarded as a promising technology in the treatment of arsenic from copper smelting effluent. It has bright future in application.

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Chemical-mineralogical characterization of copper smelting flue dust

DYNA ◽

10.15446/dyna.v81n186.32852 ◽

2014 ◽

Vol 81 (186) ◽

pp. 11 ◽

Cited By ~ 15

Author(s):

Eduardo Balladares ◽

Ursula Kelm ◽

Sonia Helle ◽

Roberto Parra ◽

Eugenia Araneda

Keyword(s):

Copper Smelting ◽

Mineralogical Characterization ◽

Flue Dust

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Detoxification of Arsenic-Containing Copper Smelting Dust by Electrochemical Advanced Oxidation Technology

Minerals ◽

10.3390/min11121311 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1311

Author(s):

Meng Li ◽

Junfan Yuan ◽

Bingbing Liu ◽

Hao Du ◽

David Dreisinger ◽

...

Keyword(s):

Solid Waste ◽

Arsenic Removal ◽

Removal Rate ◽

Advanced Oxidation ◽

Copper Smelting ◽

Lead And Zinc ◽

Heavy Nonferrous Metals ◽

Advanced Oxidation Technology ◽

Oxidation Technology ◽

Smelting Dust

A large amount of arsenic-containing solid waste is produced in the metallurgical process of heavy nonferrous metals (copper, lead, and zinc). The landfill disposal of these arsenic-containing solid waste will cause serious environmental problems and endanger people’s health. An electrochemical advanced oxidation experiment was carried out with the cathode modified by adding carbon black and polytetrafluoroethylene (PTFE) emulsion. The removal rate of arsenic using advanced electrochemical oxidation with the modified cathode in 75 g/L NaOH at 25 °C for 90 min reached 98.4%, which was significantly higher than 80.69% of the alkaline leaching arsenic removal process. The use of electrochemical advanced oxidation technology can efficiently deal with the problem of arsenic-containing toxic solid waste, considered as a cleaner and efficient method.

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Diagnose for valorisation of reprocessed slag cleaning furnace flue dust from copper smelting

Journal of Cleaner Production ◽

10.1016/j.jclepro.2018.05.090 ◽

2018 ◽

Vol 194 ◽

pp. 383-395 ◽

Cited By ~ 7

Author(s):

S.M. Pérez-Moreno ◽

M.J. Gázquez ◽

I. Ruiz-Oria ◽

G. Ríos ◽

J.P. Bolívar

Keyword(s):

Copper Smelting ◽

Slag Cleaning ◽

Flue Dust

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Simulation Study and Industrial Application of Enhanced Arsenic Removal by Regulating the Proportion of Concentrates in the SKS Copper Smelting Process

Processes ◽

10.3390/pr8040385 ◽

2020 ◽

Vol 8 (4) ◽

pp. 385

Author(s):

Qinmeng Wang ◽

Qiongqiong Wang ◽

Qinghua Tian ◽

Xueyi Guo

Keyword(s):

Arsenic Removal ◽

Copper Smelter ◽

Major Elements ◽

Copper Smelting ◽

Smelting Process ◽

Process Gas ◽

Actual Production ◽

Sulfur Potential ◽

Sulfide Concentrates ◽

Direct Guidance

Arsenic removal is a crucial issue in all copper smelters. Based on the Fangyuan 1# smelter, the effects of major elements (Cu, Fe and S) in sulfide concentrates on arsenic removal in the SKS copper smelting process were studied in this paper. The results show that Cu, Fe and S in concentrates have a significant influence on the oxygen/sulfur potential of smelting systems, and also affect the efficiency of arsenic removal. By regulating the proportion of the major elements in sulfide concentrates, the concentrate composition was changed from its original proportions (Cu 24.4%, Fe 26.8%, S 28.7%, and other 20%) to optimized proportions (Cu 19%, Fe 32%, S 29%, and other 20%). The distribution of arsenic among three phases in the original production process (gas 82.01%, slag 12.08%, matte 5.91%) was improved to obtain an optimal result (gas 94.37%, slag 3.45%, matte 2.18%). More arsenic was removed into the gas phase, and the mass fraction of arsenic in matte was reduced from 0.07% to 0.02%. The findings were applied to actual production processes in several other copper smelters, such as the Hengbang copper smelter, Yuguang smelter and Fangyuan 2# smelter. Therefore, the optimized result obtained in this work could provide direct guidance for actual production.

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Co-treatment of copper smelting flue dust and arsenic sulfide residue by a pyrometallurgical approach for simultaneous removal and recovery of arsenic

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2021.126149 ◽

2021 ◽

pp. 126149

Author(s):

Wenjuan Zhang ◽

Jianyong Che ◽

Peicheng Wen ◽

Liu Xia ◽

Baozhong Ma ◽

...

Keyword(s):

Copper Smelting ◽

Simultaneous Removal ◽

Arsenic Sulfide ◽

Flue Dust ◽

Removal And Recovery

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Treatment of high-arsenic copper smelting flue dust with high copper sulfate: Arsenic separation by low temperature roasting

Minerals Engineering ◽

10.1016/j.mineng.2021.106796 ◽

2021 ◽

Vol 164 ◽

pp. 106796

Author(s):

Yujie Chen ◽

Shun Zhu ◽

Pekka Taskinen ◽

Ning Peng ◽

Bing Peng ◽

...

Keyword(s):

Low Temperature ◽

Copper Sulfate ◽

Copper Smelting ◽

Flue Dust ◽

High Copper ◽

Arsenic Copper ◽

High Arsenic

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Arsenic Removal and Recovery from Copper Smelting Wastewater Using TiO2

Environmental Science & Technology ◽

10.1021/es1024355 ◽

2010 ◽

Vol 44 (23) ◽

pp. 9094-9098 ◽

Cited By ~ 99

Author(s):

Ting Luo ◽

Jinli Cui ◽

Shan Hu ◽

Yuying Huang ◽

Chuanyong Jing

Keyword(s):

Arsenic Removal ◽

Copper Smelting ◽

Removal And Recovery ◽

Smelting Wastewater

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Ultrastructural localization of specific nucleoprotein fractions

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081887 ◽

1978 ◽

Vol 36 (2) ◽

pp. 204-205

Author(s):

G. L. Brown

Keyword(s):

Gel Electrophoresis ◽

Mouse Liver ◽

Polyacrylamide Gel Electrophoresis ◽

Ultrastructural Localization ◽

Polyacrylamide Gel ◽

Acid Extraction ◽

Acid Solutions ◽

Low Salt ◽

Liver Nuclei ◽

Phosphate Groups

Bismuth (Bi) stains nucleoproteins (NPs) by interacting with available amino and primary phosphate groups. These two staining mechanisms are distinguishable by glutaraldehyde crosslinking (Fig. 1,2).Isolated mouse liver nuclei, extracted with salt and acid solutions, fixed in either formaldehyde (form.) or gl utaraldehyde (glut.) and stained with Bi, were viewed to determine the effect of the extractions on Bi stainina. Solubilized NPs were analyzed by SDS-polyacrylamide gel electrophoresis.Extraction with 0.14 M salt does not change the Bi staining characteristics (Fig. 3). 0.34 M salt reduces nucleolar (Nu) staining but has no effect on interchromatinic (IC) staining (Fig. 4). Proteins responsible for Nu and glut.- insensitive IC staining are removed when nuclei are extracted with 0.6 M salt (Fig. 5, 6). Low salt and acid extraction prevents Bi-Nu staining but has no effect on IC staining (Fig. 7). When nuclei are extracted with 0.6 M salt followed by low salt and acid, all Bi-staining components are removed (Fig. 8).

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