Separating Sulfur from Fuel Gas Desulfurization Gypsum with an Oxalic Acid Solution

Fan, Chao; Jiao, Qingrui; Kong, Ming; Yang, Jian; Meng, Fei; Lu, Yong; Liu, Qingcai

doi:10.1021/acsomega.0c02172

Cited by 11 publications

(3 citation statements)

References 39 publications

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“…These additives may be released into the environment due to weathering since they are not chemically bound to the polymeric matrix (Bhat et al 2023b;Bhat 2024b). Minerals like gypsum contain S naturally (Kong et al 2020), and these gypsums are used inside houses.…”

Section: Sem-edxmentioning

confidence: 99%

Evaluation of Potentially Toxic Elements and Microplastics in the Water Treatment Facility

Bhat,

Janaszek

2024

Preprint

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The potentially harmful effects of consuming potentially toxic elements (PTEs) and microplastics (MPs) regularly via drinking water are a significant cause for worry. This study investigated PTEs (Cd, Cu, Cr, Ni, Pd, Zn, Co), MPs, turbidity, pH, conductivity, and health risk assessment in the water treatment plant in Kielce, Poland. Zn had the highest concentrations throughout the water treatment facility, whereas Cd, Pb, and Co had lower concentrations (<0.1 μg/L). The order of the concentrations among the specified PTEs was like Zn˃Cu˃Ni˃Cr˃Cd˃Pb and Co. The minimum turbidity was 0.34, and the maximum was 1.9 NTU. The range of pH in water samples was 6.51 - 7.47. The conductivity was 1,203 - 1,445 ms in water samples. These identified MPs were categorized into fiber and fragments. The color of these identified MPs was blue, red, black, green, and transparent. The minimum and maximum size of the MPs was 196 and 4,018 μm, while the average size was 2,751 22 ± 1,905 μm. The average concentration of MPs per liter of the water treatment plant was 108.88 ± 55.61. The elements listed are C, O, Na, Mg, Al, Si, K, Ca, and Ti. Fe and Zn were the predominant elements seen using EDX. HQ values of the PTEs were less than one for adults and children. The human health risk associated with all detected PTEs revealed that the HQ values exhibit a satisfactory degree of non-carcinogenic adverse health risk. HI values for adults and children age groups were less than one. In most water treatment samples, the carcinogenic value exceeds the threshold value of 10−6. The PTEs and MP concentrations in drinking water are recommended to be periodically monitored to minimize consumers' environmental pollution and health risks.

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Section: Sem-edxmentioning

confidence: 99%

Evaluation of Potentially Toxic Elements and Microplastics in the Water Treatment Facility

Bhat,

Janaszek

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…These additives may be released into the environment due to weathering since they are not chemically bound to the polymeric matrix (Bhat, 2024d;Bhat et al, 2023b). Minerals like gypsum contain S naturally (Kong et al, 2020), and these gypsums are used inside houses.…”

Section: Sem-edxmentioning

confidence: 99%

Evaluation of potentially toxic elements and microplastics in the water treatment facility

Bhat,

Janaszek

2024

Environ Monit Assess

View full text Add to dashboard Cite

The potentially harmful effects of consuming potentially toxic elements (PTEs) and microplastics (MPs) regularly via drinking water are a significant cause for worry. This study investigated PTEs (Cd, Cu, Cr, Ni, Pd, Zn, Co), MPs, turbidity, pH, conductivity, and health risk assessment in the water treatment plant in Kielce, Poland. Zn had the highest concentrations throughout the water treatment facility, whereas Cd, Pb, and Co had lower concentrations (< 0.1 µg/L). The order of the concentrations among the specified PTEs was like Zn˃Cu˃Ni˃Cr˃Cd˃Pb and Co. The minimum turbidity was 0.34, and the maximum was 1.9 NTU. The range of pH in water samples was 6.51—7.47. The conductivity was 1,203—1,445 ms in water samples. These identified MPs were categorized into fiber and fragments. The color of these identified MPs was blue, red, black, green, and transparent. The minimum and maximum size of the MPs was 196 and 4,018 µm, while the average size was 2,751 ± 1,905 µm. The average concentration of MPs per liter of the water treatment plant was 108.88 ± 55.61. The elements listed are C, O, Na, Mg, Al, Si, K, Ca, and Ti. Fe and Zn were the predominant elements seen using EDX. HQ values of the PTEs were less than one for adults and children. The human health risk associated with all detected PTEs revealed that the HQ values exhibit a satisfactory degree of non-carcinogenic adverse health risk. HI values for adults and children age groups were less than one. In most water treatment samples, the carcinogenic value exceeds the threshold value of 10−6. The PTEs and MP concentrations in drinking water should be periodically monitored to minimize consumers' environmental pollution and health risks.

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“…In this study, a novel approach was proposed to remove organic sulfur from coal by microwave-assisted organic acids. Three kinds of reducing organic matter with strong acidity (Li et al, 2019;Fan et al, 2020;David et al, 2020), oxalic acid, citric acid and ascorbic acid, were selected as desulfurization solvents. Based on the single factor experimental basis of optimum desulfurization of some organic acids (Liu et al, 2020), i) the method of "microwave-assisted desulfurization of organic" was developed, ii) the orthogonal scheme of desulfurization of organic acids was designed, and iii) the optimum desulfurization conditions were analyzed, and the mechanism of organic sulfur removal was explored.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Microwave-Assisted Organic Acid Separation of Organic Sulfur from High Sulfur Coal

Jiang

Jin

Shen

et al. 2021

Preprint

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To explore the feasibility of organic acid removal of organic sulfur from high sulfur coal, three organic acids, oxalic acid, citric acid and ascorbic acid, were selected as desulfurization reagents. Combined with microwave irradiation technology, desulfurization experiments of high-sulfur coal treated with nitric acid were conducted. The orthogonal experimental results showed that microwave synergistic citric acid desulfurization had a better desulfurization effect. The removal rate of organic sulfur was 55.47% when the operation conditions of the reaction were 1 mol/L, 90 ℃ and 1000 W for 7 min. The desulfurization efficiency of oxalic acid and ascorbic acid was not good, and the removal efficiencies of organic sulfur were 32.35% and 21.37%, respectively. Fourier transform infrared spectroscopy showed that sulfones and sulfoxides were partially reduced and that the removal effect of thiophene was poor. X-ray photoelectron spectroscopy showed that the mercapto group in the mercaptan combined with hydrogen ions and escaped in the form of H2S. The content of aromatic thioether and aromatic thiol in the coal treated with microwave irradiation was only 0.1%. Research indicates that microwave-assisted organic acid removal of organic sulfur is feasible, and researchers can explore more efficient organic acids as desulfurization reagents based on this study.

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Separating Sulfur from Fuel Gas Desulfurization Gypsum with an Oxalic Acid Solution

Cited by 11 publications

References 39 publications

Evaluation of Potentially Toxic Elements and Microplastics in the Water Treatment Facility

Evaluation of Potentially Toxic Elements and Microplastics in the Water Treatment Facility

Evaluation of potentially toxic elements and microplastics in the water treatment facility

Evaluation of Microwave-Assisted Organic Acid Separation of Organic Sulfur from High Sulfur Coal

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