Mechanochemical disproportionation reaction of sulfur on Bi2O3 to synthesize Bi2O2S for simultaneous removals of Cu2+ and Cl- from waste solution

Nowadays, using fly ash for zeolites production has become a well-known strategy aimed on sustainable development. During zeolite synthesis in a hydrothermal conversion large amount of post-reaction solution is generated. In this work, the solution was used as a substrate for Na-A and Na-X zeolites synthesis at laboratory and technical scale. Obtained materials were characterized using particle size analysis, X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FTIR), and nitrogen adsorption/desorption isotherm. Produced zeolites revealed high purity (>98%) and monomineral zeolitic phase composition. The SiO2 content was in the range 39–42% and 40–38%, whereas Al2O3 content was 23–22% and 25–26% for Na-X and Na-A, respectively. TEM and BET analyses revealed Na-X zeolite pores were almost identical to commercial 13X with SBET in the range 671–734 m2/g. FTIR indicated slight differences between materials obtained at laboratory and technical scale in Si-O-(Si/Al) bridges of the zeolitic skeleton. The results showed good replicability of the laboratory process in the larger scale. The proposed method allows for waste solution reusability with a view to highly pure zeolites production in line with circular economy assumptions.

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Finland's nuclear waste solution

IEEE Spectrum ◽

10.1109/mspec.2009.5340248 ◽

2009 ◽

Vol 46 (12) ◽

pp. 25-49 ◽

Cited By ~ 1

Author(s):

Sandra Upson

Keyword(s):

Nuclear Waste ◽

Waste Solution

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The role of biomass in polyethylenimine-coated chitosan/bacterial biomass composite biosorbent fiber for removal of Ru from acetic acid waste solution

Bioresource Technology ◽

10.1016/j.biortech.2014.01.082 ◽

2014 ◽

Vol 160 ◽

pp. 93-97 ◽

Cited By ~ 29

Author(s):

Sung Wook Won ◽

In Seob Kwak ◽

Yeoung-Sang Yun

Keyword(s):

Acetic Acid ◽

Bacterial Biomass ◽

Waste Solution ◽

Acid Waste

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Development of iron phosphate ceramic waste form to immobilize radioactive waste solution

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2014.04.033 ◽

2014 ◽

Vol 452 (1-3) ◽

pp. 16-23 ◽

Cited By ~ 13

Author(s):

Jongkwon Choi ◽

Wooyong Um ◽

Sungwook Choung

Keyword(s):

Radioactive Waste ◽

Iron Phosphate ◽

Waste Form ◽

Waste Solution ◽

Ceramic Waste

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Ruthenium Recovery from Acetic Acid Waste Solution by Using PEI-Coated Biomass-Chitosan Composite Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1130.577 ◽

2015 ◽

Vol 1130 ◽

pp. 577-580 ◽

Cited By ~ 1

Author(s):

Jeong Ae Kim ◽

Myung Hee Song ◽

Yeoung Sang Yun

Keyword(s):

Molecular Weight ◽

Acetic Acid ◽

Freeze Drying ◽

Ion Exchange Resin ◽

Composite Fiber ◽

Drying Methods ◽

Drying Method ◽

Waste Solution ◽

Chitosan Composite ◽

Acid Waste

Polyethylenimine (PEI)-coated biomass-chitosan composite fiber (PBCF) was fabricated to recover Ru from acetic acid waste solution. The present work aimed to understand the effects of molecular weight of chitosan and drying method on stability and sorption performance of the PBCF. For this, the PBCF was prepared by extruding the mixed solutions of chitosan and Corynebacteriumglutamicum to form the composite fibers which were modified with ionic polymer, PEI. The degree of swelling of PBCFs prepared by hot-air, natural, and freeze drying methods were 1.25, 1.34, and 1.07 %, respectively, indicating that the freeze-drying method was the best. Batch biosorption studies showed that the maximum Ru uptake could be achieved with PBCF prepared with medium molecular weight chitosan, and could reach 34.1 mg/g, which was 7.9 times higher than that of the commercial ion exchange resin, LEWATIT® MonoPlus M 500 (4.3 mg/g). Therefore, PBCF can be considered as an alternative sorbent to synthetic resin for recovery of Ru form industrial acetic acid waste solution.

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Isolation and structure of [Re2Cl7(dto)]−. A quadruply bonded intermediate in an intramolecular disproportionation reaction

Polyhedron ◽

10.1016/s0277-5387(00)81210-3 ◽

1988 ◽

Vol 7 (13) ◽

pp. 1207-1209 ◽

Cited By ~ 6

Author(s):

Bruce J. Heyen ◽

Gregory L. Powell

Keyword(s):

Disproportionation Reaction

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Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

Metals ◽

10.3390/met8090654 ◽

2018 ◽

Vol 8 (9) ◽

pp. 654 ◽

Cited By ~ 6

Author(s):

Moussa Toure ◽

Guilhem Arrachart ◽

Jean Duhamet ◽

Stephane Pellet-Rostaing

Keyword(s):

Extraction Efficiency ◽

Methyl Isobutyl Ketone ◽

Selective Extraction ◽

Extraction Process ◽

Liquid Extraction ◽

Methyl Isobutyl ◽

Isobutyl Ketone ◽

Waste Solution ◽

Liquid Liquid Extraction ◽

D Values

A study has been carried out on Ta and Nb recovery by a liquid-liquid extraction process using 4-methylacetophenone (4-MAcPh) as the organic phase. The 4-MAcPh was compared to methyl isobutyl ketone (MIBK) with respect to extraction efficiencies (D values) at different concentrations of H2SO4 in the aqueous phase. The results showed a similar extraction of Nb for both solvents. However, for Ta, extraction efficiency is increased by a factor of 1.3 for 4-MAcPh. In addition, the MIBK solubilized completely after 6 mol∙L−1 of H2SO4 against only a loss of 0.14–4% for 4-MAcPh between 6 and 9 mol∙L−1 of H2SO4. The potential of 4-MAcPh has also been studied to selectively recover Ta from a model capacitor waste solution. The results showed a selectivity for Ta in the presence of impurities such as Ag, Fe, Ni and Mn. The 4-MAcPh also presents the advantage of having physicochemical properties adapted to its use in liquid-liquid extraction technologies such as mixer-settlers.

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