Preparation of a Novel Coal Gangue–Polyacrylamide Hybrid Flocculant and Its Flocculation Performance

Quan, Xiangao; Wang, Huiyun

doi:10.1016/j.cjche.2014.06.032

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…PAFC is mostly prepared from FeCl 3 and AlCl 3 , which is more costly, and the mineral synthesis of PAFC and other coagulants have also been reported [ 28 , 29 , 30 , 31 ], but they are mostly polymerized by hydrothermal methods for several hours, which are less efficient.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Poly Aluminum-Ferric Chloride (PAFC) Coagulant by Extracting Aluminum and Iron Ions from High Iron Content Coal Gangue

et al. 2022

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Poly aluminum-ferric Chloride (PAFC) is a new type of high efficiency coagulant. In this study, high iron type gangue is used as a main raw material. It is calcined at 675 °C for 1 h and 3% CaF2 is added to the calcined powder and reacted with 20% hydrochloric acid at 93 °C for 4 h. The leaching ratio of aluminum ions is 90% and that of iron ions is 91%. After Fe2+ ions are oxidized in the filtrate, CaCO3 is used to adjust the pH of the filtrate to 0.7. The microwave power is adjusted to 80 W and the filtrate is radiated for 5 min. After being aged for 24 h, PAFC product is obtained. The prepared PAFC is used to treat mine water and compared with the results of PAC and PAF, the turbidity removal ratio of PAFC is 99.6%, which is greater than 96.4% of PAC and 93.7% of PAF. PAFC is a mixture with different degrees of polymerization. It demonstrates that extracting aluminum and iron ions from high iron content gangue to prepare PAFC by microwave is efficient and feasible.

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Section: Introductionmentioning

confidence: 99%

Preparation of Poly Aluminum-Ferric Chloride (PAFC) Coagulant by Extracting Aluminum and Iron Ions from High Iron Content Coal Gangue

et al. 2022

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“…2(a). It can be observed that the major mineralogical composition of the modified CG is quartz.This can be attributed to the reactions of the components (SiO2, Al2O3, Fe2O3, CaO, and MgO) of CG with the acid and alkali used for leaching, which increased the relative amount and porosity of quartz remarkably (Quan and Wang, 2014). The diffraction 8 peaks according to Fig.…”

Section: Xrd Analysismentioning

confidence: 95%

“…It was characterized by Fourier transform infrared spectrometry (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and atomic absorption spectrometry (AAS). It has been used as a flocculant for oilfield drilling wastewater (Quan and Wang, 2014), but has not been studied as an adsorbent to remove metal ions from wastewater. HCGPAM can effectively adsorb Pb2+ and Cu2+ from wastewater and hence can be applied to treating sewage including Pb2+ and Cu2+; this has favorable market prospects.…”

Section: Introductionmentioning

confidence: 99%

Preparation of hybrid coal gangue-polyacrylamide adsorbent and analysis of its performance for removal of Cu2+ and Pb2+ from wastewater

Sun¹,

Zhu²,

Wang³

et al. 2021

Preprint

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This study describes the preparation of a low-cost adsorbent (hybrid coal gangue–polyacrylamide (HCGPAM)) based on activated coal gangue and acrylamide, and explores the effects of using it to remove Cu2+ and Pb2+ from wastewater. It investigated factors such as the impact of the initial concentrations of Pb2+ and Cu2+, adsorption time and temperature, and solution pH. The HCGPAM was fully characterized using Fourier transform infrared spectrometry, scanning electron microscopy, X-ray diffraction, and atomic absorption spectrometry (AAS), and the Pb2+ and Cu2+ concentrations were measured using graphite furnace AAS. The adsorption performance experiment was conducted at 25 ℃ with initial Pb2+ and Cu2+ concentrations of 100 ug⋅ml− 1, an adsorbent dosage of 0.350 g, and an adsorption time of 30 min. The pH values of the Pb2+ and Cu2+ solutions were 5 and 4, respectively. When the adsorption effect was at an optimum, the Pb2+ and Cu2+ attained adsorption rates of 59.05% and 80.6%, respectively. The HCGPAM can be used to treat polluted sewage and therefore has favorable prospects for commercial application.

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“…erefore, achieving another relatively stable state, the emergence of the antistabilization phenomenon is hard to agglomerate, which results in deterioration of the occulation e ect [31][32][33][34]. Less dose of occulant is not enough to form a bridge, and the excess dose of occulant deteriorates the function of the polymer occulant.…”

Section: Application Of Bpfsmentioning

confidence: 99%

Immobilized Microbial Catalytic Oxidation Preparation and Application of Biopolymeric Ferric Sulfate

Lü

Liu

et al. 2019

Journal of Chemistry

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A novel inorganic polymer flocculant, biopolymeric ferric sulfate (BPFS), was prepared by immobilization technology of microorganisms and by oxidation of ferrous sulfate using domestic Thiobacillus ferrooxidans (T. f) under acidic condition. T. f was isolated on the agarose single-plate medium, which exhibited an unusual trait on the utilization of low concentration of the nitrogen source and phosphorus as the nutrient substance. Under the optimal conditions, the microorganism could grow and reproduce normally and maintain the strong catalytic oxidation activity to Fe2+. The immobilization of T. f on the polyurethane as the support matrix was investigated. Cycling batch operation was applied to the preparation of 40 kg/m3, 60 kg/m3, and 80 kg/m3 BPFS when the optimal conditions are pH value of 1.8, circulation flow rate of 0.28–0.30 L/h, and reaction temperature of 28 ± 1°C. When the prepared BPFS and SPFS (solid biopolymeric ferric sulfate) were used to dispose Songhua River water, the removal rate of turbidity and CODMn of BPFS was slightly better than that of SPFS. The removal efficiencies of turbidity and CODMn by BPFS could reach 93.9% and 79.7%, respectively. The result suggests that the BPFS has good flocculating activity.

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Preparation of a Novel Coal Gangue–Polyacrylamide Hybrid Flocculant and Its Flocculation Performance

Cited by 10 publications

References 25 publications

Preparation of Poly Aluminum-Ferric Chloride (PAFC) Coagulant by Extracting Aluminum and Iron Ions from High Iron Content Coal Gangue

Preparation of Poly Aluminum-Ferric Chloride (PAFC) Coagulant by Extracting Aluminum and Iron Ions from High Iron Content Coal Gangue

Preparation of hybrid coal gangue-polyacrylamide adsorbent and analysis of its performance for removal of Cu2+ and Pb2+ from wastewater

Immobilized Microbial Catalytic Oxidation Preparation and Application of Biopolymeric Ferric Sulfate

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