Innovative and green utilization of zinc-bearing dust by hydrogen reduction: Recovery of zinc and lead, and synergetic preparation of Fe/C micro-electrolysis materials

Guo, Zhengqi; Zhan, Ruoning; Shi, Yue; Zhu, Deqing; Pan, Jian; Chao, Yang; Wang, Yige; Wang, Jin

doi:10.1016/j.cej.2022.141157

Cited by 81 publications

(17 citation statements)

References 59 publications

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“…The SR of hydrogels is influenced by hydrophilic groups, the characteristics of the solution, and the elasticity of the polymer network. Functional groups cause electrostatic repulsion inside the network, accordingly expanding the gel and ultimately resulting in equilibrium [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Aljar

Rashdan

Almutawah

et al. 2023

Gels

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Globally, water contamination by heavy metals is a serious problem that affects the environment and human health. Adsorption is the most efficient way of water treatment for eliminating heavy metals. Various hydrogels have been prepared and used as adsorbents to remove heavy metals. By taking advantage of poly(vinyl alcohol) (PVA), chitosan (CS), cellulose (CE), and the process for physical crosslinking, we propose a simple method to prepare a PVA-CS/CE composite hydrogel adsorbent for the removal of Pb(II), Cd(II), Zn(II) and Co(II) from water. Structural analyses of the adsorbent were examined by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis, and X-ray diffraction (XRD). PVA-CS/CE hydrogel beads had a good spherical shape together with a robust structure and suitable functional groups for the adsorption of heavy metals. The effects of adsorption parameters such as pH, contact time, adsorbent dose, initial concentration of metal ions, and temperature on the adsorption capacity of PVA-CS/CE adsorbent were studied. The adsorption characteristics of PVA-CS/CE for heavy metals may be completely explained by pseudo-second-order adsorption and the Langmuir adsorption model. The removal efficiency of PVA-CS/CE adsorbent for Pb(II), Cd(II), Zn(II), and Co(II) was 99, 95, 92, and 84%, respectively, within 60 min. The heavy metal’s hydrated ionic radius may be crucial in determining the adsorption preference. After five consecutive adsorption–desorption cycles, the removal efficiency remained over 80%. As a result, the outstanding adsorption-desorption properties of PVA-CS/CE can potentially be extended to industrial wastewater for heavy metal ion removal.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Aljar

Rashdan

Almutawah

et al. 2023

Gels

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“…The sample was subsequently placed in a Φ30 × 30 mm mold, poured into the liquid, and cooled to room temperature. The sample was cured in a constant temperature oven at 70 °C for over 8 h to ensure complete resin curing . Finally, the Tegramin-25 semi-automatic grinding and polishing machine were utilized for grinding and polishing.…”

Section: Methodsmentioning

confidence: 99%

Clean Preparation of Formed Coke from Semi-coke by the Carbonated Consolidation Process

Guo

Zhu

et al. 2023

ACS Omega

Self Cite

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In order to address the low thermal efficiency of low-rank coal combustion and the accompanying serious environmental issues, formed coke was prepared using a carbonization consolidation method with low-rank coal semi-coke. The test for briquetting and carbonation consolidation conditions revealed that the optimal parameters were a briquetting pressure of 93.63 MPa, moisture content of 16%, Ca(OH)2 binder amount of 10%, and a CO2 concentration of 30% at 20 °C. Under these conditions and a carbonation consolidation time of 60 min, high-quality formed coke was produced, exhibiting a compressive strength of 1256.2 N/a, redrying strength of 286.2 N/a, and a dropping strength of 10.6 number/a. The combustion characteristics of the prepared formed coke were investigated, revealing that ignition temperatures (345.39 °C), burnout temperatures (495.57 °C), and peak of the maximum weight loss rate temperatures (437.93 °C) are slightly higher than those of bituminous coal. The low calorific value of the briquette was 20.4 MJ/kg. During the combustion process, the emission concentrations of SO2, NO X , and solid particles from the formed coke were significantly lower than those of bituminous coal, indicating that it is a cleaner energy source. Moreover, adding Ca(OH)2 effectively reduced SO2 emissions and achieved sulfur fixation and emission reduction.

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“…Water and wastewater industries use adsorption as one of the most important separation and purification processes to remove color, odor, and organic pollution [7][8][9][10][11][12][13] . There is a wide variety of microorganisms including bacteria, fungi, and algae that are used as metal adsorbents [14][15][16][17][18][19] . Also, the different synthesis procedures using biopolymer namely chitosan were applied to the adsorption of strontium from aqueous solutions [20][21][22][23][24][25] They observed the maximum capacity of 142.5 mg/g at room temperature and fitting adsorption isotherms well with a pseudo-second-order (PSO) kinetics model.…”

Section: Adjusted Correlation Coefficient M Adsmentioning

confidence: 99%

Intensification of strontium (II) ion biosorption on Sargassum sp via response surface methodology

Soleymani

Khani

Pahlevanzadeh

et al. 2023

Sci Rep

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A batch system was employed to investigate the biosorption of strontium (II) on Sargassum sp. The biosorption of strontium on Sargassum sp was studied with response surface methodology to determine the combined effect of temperature, initial metal ion concentration, biomass treatment, biosorbent dosage and pH. Under optimal conditions, the algae's biosorption capacity for strontium (initial pH 7.2, initial strontium concentration 300 mg/l for Mg-treated biomass and biosorbent dosage 0.1 g in 100 mL metal solution) was measured at 103.95 mg/g. In our analysis, equilibrium data were fitted to Langmuir and Freundlich isotherms. Results show that the best fit is provided by the Freundlich model. Biosorption dynamics analysis of the experimental data indicated that strontium (II) was absorbed into algal biomass in accordance with the pseudo-second-order kinetics model well.

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Innovative and green utilization of zinc-bearing dust by hydrogen reduction: Recovery of zinc and lead, and synergetic preparation of Fe/C micro-electrolysis materials

Cited by 81 publications

References 59 publications

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Clean Preparation of Formed Coke from Semi-coke by the Carbonated Consolidation Process

Intensification of strontium (II) ion biosorption on Sargassum sp via response surface methodology

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