Purification of chlorine-containing wastewater using solvent extraction

Zhang, Liangjing; Lv, Peng; He, Yuan; Li, Shiwei; Chen, Kaihua; Yin, Shaohua

doi:10.1016/j.jclepro.2020.122863

Cited by 34 publications

(14 citation statements)

References 21 publications

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“…The chloride in the solid can be washed to remove chloride ions. The chlor-containing wastewater can be treated by solvent extraction, the electrochemical method, separation interception method, the principle of precipitation, and ion exchange [90].…”

Section: Chlorination Of V 2 Omentioning

confidence: 99%

Extraction of the Rare Element Vanadium from Vanadium-Containing Materials by Chlorination Method: A Critical Review

Liu

Xue

Wang

2021

Metals

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Vanadium as a rare element has a wide range of applications in iron and steel production, vanadium flow batteries, catalysts, etc. In 2018, the world’s total vanadium output calculated in the form of metal vanadium was 91,844 t. The raw materials for the production of vanadium products mainly include vanadium-titanium magnetite, vanadium slag, stone coal, petroleum coke, fly ash, and spent catalysts, etc. Chlorinated metallurgy has a wide range of applications in the treatment of ore, slag, solid wastes, etc. Chlorinating agent plays an important role in chlorination metallurgy, which is divided into solid (NaCl, KCl, CaCl2, AlCl3, FeCl2, FeCl3, MgCl2, NH4Cl, NaClO, and NaClO3) and gas (Cl2, HCl, and CCl4). The chlorination of vanadium oxides (V2O3 and V2O5) by different chlorinating agents was investigated from the thermodynamics. Meanwhile, this paper summarizes the research progress of chlorination in the treatment of vanadium-containing materials. This paper has important reference significance for further adopting the chlorination method to treat vanadium-containing raw materials.

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Section: Chlorination Of V 2 Omentioning

confidence: 99%

Extraction of the Rare Element Vanadium from Vanadium-Containing Materials by Chlorination Method: A Critical Review

Liu

Xue

Wang

2021

Metals

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“…Nowadays, environmental pollution has become a worldwide problem of high concern, especially in developing countries. Therefore, many technologies have been applied to deal with this issue, such as chemical oxidation and reduction [ 1 , 2 ], adsorption [ 3 , 4 ], coagulation [ 5 ], extraction [ 6 , 7 ] and biological treatment [ 8 ]. However, these technologies have the disadvantages of secondary pollution and limited application.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Porous g-C3N4 with Enhanced Visible-Light Photoactivity

Yao

Liu

et al. 2022

Molecules

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Porous graphitic carbon nitride (g-C3N4) was prepared by dicyandiamide and urea via the pyrolysis method, which possessed enhanced visible-light-driven photocatalytic performance. Its surface area was increased from 17.12 to 48.00 m2/g. The porous structure not only enhanced the light capture capacity, but also accelerated the mass transfer ability. The Di (Dicyandiamide)/Ur (Urea) composite possessed better photocatalytic activity for Rhodamine B in visible light than that of g-C3N4. Moreover, the Di/Ur-4:5 composite showed the best photoactivity, which was almost 5.8 times that of g-C3N4. The enhanced photocatalytic activity showed that holes and superoxide radical played a key role in the process of photodegradation, which was ascribed to the enhanced separation of photogenerated carriers. The efficient separation of photogenerated electron-hole pairs may be owing to the higher surface area, O dopant, and pore volumes, which can not only improve the trapping opportunities of charge carriers but also the retarded charge carrier recombination. Therefore, it is expected that the composite would be a promising candidate material for organic pollutant degradation.

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“…According to researchers, extractant that has been regenerated can be used in place of the new extractant [5,6]. The most of previous researchers looked at the components of degradation in copper solvent extraction circuits, as well as the impact of hydroxyoxime degradation products on metal extraction.…”

Section: Introductionmentioning

confidence: 99%

Regeneration Of Degraded Extractant By Sodium Hydroxide Activated Clay And Evaluation Of Its Per-formances In Copper Solvent Extraction

Kishiko¹,

Nheta²

2022

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering

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In copper solvent extraction, phenolic hydroxy oximes-based extractant has been observed to deteriorate progressively during extraction. Hydrolysis, rather than oxidation or Beckmann rearrangement, produce majority of the degradation products. Degradation products impact the solvent extraction method by lowering extraction efficiency, reaction kinetics, and Cu/Fe selectivity, slowing the phase disengagement time and polluting the electrolyte. Activated clay using sodium hydroxide (NaOH) was used to regenerate deteriorated extractant. After the regeneration step, the organic phase's performance improved: extraction efficiency increased from 67 to 97.3 % maximum, Cu/Fe selectivity increased from 169 to 283 and phase disengagement time decreased from 113 to 88 seconds.

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Purification of chlorine-containing wastewater using solvent extraction

Cited by 34 publications

References 21 publications

Extraction of the Rare Element Vanadium from Vanadium-Containing Materials by Chlorination Method: A Critical Review

Extraction of the Rare Element Vanadium from Vanadium-Containing Materials by Chlorination Method: A Critical Review

Facile Synthesis of Porous g-C3N4 with Enhanced Visible-Light Photoactivity

Regeneration Of Degraded Extractant By Sodium Hydroxide Activated Clay And Evaluation Of Its Per-formances In Copper Solvent Extraction

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