Surface modification of malachite with ethanediamine and its effect on sulfidization flotation

Feng, Qicheng; Zhao, Wenjuan; Wen, Shuming

doi:10.1016/j.apsusc.2017.12.113

Cited by 153 publications

(37 citation statements)

References 34 publications

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“…The MEA with detective wavelength of 220 nm was eluted at 9.8 min. MEA removal efficiency was determined using Equation (4).…”

Section: Analysis Methodsmentioning

confidence: 99%

“…Acetochlor is a kind of systemic chloroacetamide herbicide, which has been widely used as the pesticides for control of some annual broadleaf and grass weeds in China [1]. Acetochlor industrial wastewater contains large amounts of highly toxic organic pollutants and heavy metals [2][3][4]. 2-methyl-6-ethylaniline (MEA) which belongs to the aniline compounds is the main metabolite of acetochlor in the wastewater [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Horseradish Peroxidase Catalytic Degradation for 2-Methyl-6-Ethylaniline Removal Using Response Surface Methodology

Shen

Wang

Shu

et al. 2019

Water

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For optimizing the reaction conditions of 2-methyl-6-ethylaniline (MEA) degradation catalyzed by horseradish peroxidase (HRP), a response surface methodology with three factors and three levels was used in this research to establish a regression model, a ternary quadratic polynomial, in order to analyze temperature, H2O2 concentration and pH effects on MEA removal efficiency. The results showed that the regression model was significant (p < 0.0001), fitted well with experimental data and had a high degree of reliability and accuracy, and the data were reasonable with low errors. By analyzing interactions and solving the regression model, the maximum MEA removal efficiency was 97.90%, and the optimal conditions were defined as follows: pH 5.02, H2O2 concentration 13.41mM, and temperature 30.95 °C. Under the optimal conditions, the average MEA removal efficiency obtained from the experiments was 97.56%. This research can provide reference for the treatment of actual acetochlor industrial wastewater.

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“…The MEA with detective wavelength of 220 nm was eluted at 9.8 min. MEA removal efficiency was determined using Equation (4).…”

Section: Analysis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of Horseradish Peroxidase Catalytic Degradation for 2-Methyl-6-Ethylaniline Removal Using Response Surface Methodology

Shen

Wang

Shu

et al. 2019

Water

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show abstract

“…The data from Table 2 shows that the specific surface area of the chrysocolla particles 45-74 µm in size was 242.51 m 2 ·g −1 and that of malachite particles in same size was 0.363 m 2 ·g −1 . This indicates that chrysocolla has a larger specific surface area than malachite, which may be the reason that enormous amounts of EDP, sodium sulfide, and xanthate are needed to float chrysocolla compared to that required to float malachite [21,22]. When using analytical equipment for N 2 adsorption/desorption experiments, false peaks may be formed, leading to analytical errors.…”

Section: Surface Structure and Properties Of Chrysocollamentioning

confidence: 99%

Effect of Ethylene Diamine Phosphate on the Sulfidization Flotation of Chrysocolla

Shen

Liu

et al. 2018

Minerals

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Abstract:In this study, ethylene diamine phosphate (EDP) was employed as an activator to improve the sulfidization and flotation of chrysocolla. The micro-flotation experiment results indicated that EDP could greatly increase the flotation recovery of chrysocolla. BET and TEM measurements confirmed that the porous structure of the chrysocolla's surface would lead to large amounts of the reagents. ICP-AES analysis revealed that the addition of EDP caused more active Cu sites formed on the chrysocolla's surface, enhancing the adsorption of S 2− on its surface. Meanwhile, a redox reaction occurred between the S 2− and [Cu(en) 2 ] 2+ ions causing the Cu, S, and N in the solution to counter-adsorb onto the chrysocolla's surface by forming new complexes. During this reaction, the Cu(II) species reduced to Cu(I) species and the sulfide ions in the form of S 2− , S 2 2− , S n 2− , and SO 4 2− appeared on the mineral surface. The zeta potential measurements further revealed that the EDP-activated chrysocolla surfaces adsorbed more sulfide species and xanthate species, thereby improving the floatability of the chrysocolla.

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“…Ore tailings are the solid wastes produced by flotation [10][11][12], gravity concentration [13], and other separation of minerals [14]. Economic developments have greatly increased the demand for mineral products, as well as the scale of mining development [15,16].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Portland Cement with Gold Ore Tailings

Wang

Yao

Zhu

et al. 2019

Advances in Materials Science and Engineering

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e disposal of gold ore tailings (GTs) has been a very difficult problem for a long time. us, this study explored a new approach to the management of GTs by preparing Portland cement. Physical properties, reaction mechanisms, and hydration product types of cement prepared with GTs (C-GTs) and ordinary Portland cement (C-SS) were compared. X-ray diffraction (XRD), thermogravimetric (TG), and scanning electron microscope energy-dispersive spectroscopy (SEM-EDS) analysis techniques were used to study the mineralogical phases of the clinker and raw materials, hydration product types, and microtopography. e consistency, setting time, flexural strength and compressive strength values of the cement samples (C-GTs and C-SS), and burnability of the raw materials were also studied. e burnability analysis indicated that GTs provided a higher reactivity. e XRD results showed that the clinker phases of the C-GTs were C 3 S, C 2 S, C 3 A, and C 4 AF. e XRD, TG, and SEM-EDS results showed that the hydration products were flaky calcium hydroxide, rod-shaped ettringite, and granular C-S-H gels. Its compressive strength and flexural strength were, respectively, 30.4 MPa and 6.1 MPa at the curing age of 3 days and 59.1 MPa and 9.8 MPa at the curing age of 28 days, which were slightly higher than those of the C-SS. Furthermore, the results showed that the consistency, initial setting time, and final setting time for the two kinds of cement were similar, which further suggested that GTs could be used to prepare Portland cement.

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Surface modification of malachite with ethanediamine and its effect on sulfidization flotation

Cited by 153 publications

References 34 publications

Optimization of Horseradish Peroxidase Catalytic Degradation for 2-Methyl-6-Ethylaniline Removal Using Response Surface Methodology

Optimization of Horseradish Peroxidase Catalytic Degradation for 2-Methyl-6-Ethylaniline Removal Using Response Surface Methodology

Effect of Ethylene Diamine Phosphate on the Sulfidization Flotation of Chrysocolla

Preparation of Portland Cement with Gold Ore Tailings

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