Preparation of micro-electrolysis material from flotation waste of copper slag and its application for degradation of organic contaminants in water

Yu, Wei; Sun, Yangyang; Lei, Mengjie; Chen, Shumei; Qiu, Tingsheng; Tang, Qingbo

doi:10.1016/j.jhazmat.2018.08.098

Cited by 44 publications

(14 citation statements)

References 34 publications

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“…As shown in Figure 6, it is clear that the removal efficiency decreased with the increase of temperature. In general, a high temperature can accelerate carbon graphitization, causing worse adsorption capacity (Yu et al, 2019). Besides, compared the results in Figure 5, the removal efficiency using BC-1000, BC-900 and BC-800 was higher than that of Fe 0 -BC-1000, Fe 0 -BC-900 and Fe 0 -BC-800, respectively.…”

mentioning

confidence: 90%

Synthesis of zero-valent iron/biochar by carbothermal reduction from wood waste and iron mud for removing rhodamine B

Chen

Liu

Gen

et al. 2021

Environ Sci Pollut Res

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This study proposes a new process to synthesize zero-valent iron/biochar (Fe 0 -BC) by carbothermal reduction using wood waste and iron mud as raw materials under different temperature. The characterization results showed that the Fe 0 -BC synthesized at 1200ºC (Fe 0 -BC-1200) possessed favorable adsorption capacity with the specific surface area of 103.18 m 2 /g, and that the zero-valent iron (Fe 0 ) particles were uniformly dispersed 13 on the biochar surface. The removal efficiency of rhodamine B (RB) was determined 14 to evaluate the performance of the prepared Fe 0 -BC. Fe 0 -BC-1200 presented the best 15 performance on RB removal, which mainly ascribe to that more Fe 0 particles generated at higher temperature. The equilibrium adsorption capacity reached 49.93 mg/g when the initial RB concentration and the Fe 0 -BC-1200 dosage were 100 mg/L and 2g/L, respectively, and the pseudo-second-order model was suitable to fit the removal experimental data. LCMC and XRD analyses revealed that the removal mechanism included the physical adsorption of biochar and the redox reaction of Fe 0 . Moreover, copper existed in the iron mud was also reduced to Cu 0 , which was beneficial to catalyze the oxidation of iron, the degradation of RB was promoted at the same time.

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confidence: 90%

Synthesis of zero-valent iron/biochar by carbothermal reduction from wood waste and iron mud for removing rhodamine B

Chen

Liu

Gen

et al. 2021

Environ Sci Pollut Res

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“…A XCGS-50 Davis tube (Nanchang Li Yuan Mining and Metallurgy Equipment Co., Ltd., Nanchang, China) with a magnetic induction intensity of 0.04T was used to separate the slurry. The methods of roasting, grinding, and magnetic separation were based on previous studies [15,21].…”

Section: Methodsmentioning

confidence: 99%

Effect of Sodium Borate on the Preparation of TiN from Titanomagnetite Concentrates by Carbothermic Reduction–Magnetic Separation and Acid Leaching Process

Wen

Chen

et al. 2019

Minerals

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Carbothermic reduction–magnetic separation and acid leaching processes were used to produce TiN and direct reduced iron (DRI) from titanomagnetite concentrates. The effects of sodium borate on the reduction behavior of TMCs, the magnetic separation of the reduced products, and the purification of the impure TiN by acid leaching were investigated. Results of x-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy analysis showed that magnesium aluminate spinel (MgAl2O4) was generated in the reduced products, which could hinder the purification of the TiN. Adding sodium borate not only inhibited the formation of MgAl2O4, but also promoted the formation of TiN by decreasing the roasting temperature and time. Adding sodium borate slightly affected the separation of metallic Fe and TiN. By adding 16% sodium borate, a DRI with 94.3% Fe, 0.6% Ti, and 0.1% V was obtained by magnetic separation. After HCl + HF leaching, the TiN product containing 74.1% Ti and 2.8% V was obtained with the Ti recovery of 94.6% and V recovery of 58.3%.

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“…For every 1 ton of copper produced, approximately 2 tons of copper tailing is generated, which contains elements such as iron, zinc, and copper. 4,5 The annual amount of copper tailing produced is approximately 25 million tons. Most of the copper tailing is stacked or sold as an iron source, which is a potential threat to the environment.…”

Section: Introductionmentioning

confidence: 99%

“…3,5 Therefore, methods to reduce or reuse copper tailing have been explored extensively. Yu et al 5 reported the application of copper tailing as raw material in microelectrolysis for the degradation of organic contaminants. Zhou et al 6 researched the possibility of iron recovery from copper tailing using walnut shell as the reductant.…”

Section: Introductionmentioning

confidence: 99%

“…Copper tailing is the waste solid mixture produced from the flotation separation of copper from copper ore; the specific process of the copper tailing is shown in Figure S1 of the Supporting Information. For every 1 ton of copper produced, approximately 2 tons of copper tailing is generated, which contains elements such as iron, zinc, and copper. , The annual amount of copper tailing produced is approximately 25 million tons. Most of the copper tailing is stacked or sold as an iron source, which is a potential threat to the environment. , Therefore, methods to reduce or reuse copper tailing have been explored extensively.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Removal of Sulfur Dioxide from Flue Gas through Liquid Catalytic Oxidation Using Copper Tailing as the In Situ Iron Ion Donator

Tao

Wang

et al. 2020

Energy Fuels

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In recent years, the utilization of copper tailing and removal of sulfur dioxide (SO2) have become the focus of research. In this study, copper tailing was used as an iron ion donator to remove SO2 from flue gas. To improve the desulfurization performance, the additive was selected from metal sulfates, such as ferrous sulfate, ferric sulfate, manganese sulfate, and scrap iron. A series of experiments were conducted in a bubble reactor to study the effects of various critical factors, including the inlet SO2 concentration, solid/liquid ratio, dosage of additive, gas flow rate, O2 concentration, and reaction temperature, on the flue gas desulfurization performance. Various characterizations, such as X-ray fluorescence spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy with energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, inductively coupled plasma spectroscopy, and titration, were used to study the properties of copper tailing and absorption liquid. Furthermore, the reaction mechanism of SO2 removal was also studied. The results showed that copper tailing combined with MnSO4·H2O exhibited the highest SO2 removal efficiency. The desulfurization efficiency reached approximately 99% and was mainly affected by the flue gas flow rate and the absorption temperature. Mn2+ served as a catalyst for liquid-phase catalytic oxidation. Furthermore, the leaching reaction contributed to the consumption of some H+, whereas Fe2+ (primarily leached from fayalite in the copper tailing) served as its activation state and variable valence state with Mn2+ for the efficient removal of SO2. Moreover, the reduction of flue gas desulfurization is attributed to the accumulation of SO4 2– and H+ in the slurry.

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Preparation of micro-electrolysis material from flotation waste of copper slag and its application for degradation of organic contaminants in water

Cited by 44 publications

References 34 publications

Synthesis of zero-valent iron/biochar by carbothermal reduction from wood waste and iron mud for removing rhodamine B

Synthesis of zero-valent iron/biochar by carbothermal reduction from wood waste and iron mud for removing rhodamine B

Effect of Sodium Borate on the Preparation of TiN from Titanomagnetite Concentrates by Carbothermic Reduction–Magnetic Separation and Acid Leaching Process

Efficient Removal of Sulfur Dioxide from Flue Gas through Liquid Catalytic Oxidation Using Copper Tailing as the In Situ Iron Ion Donator

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