Chemical forms of the fluorine, chlorine, oxygen and carbon in coal fly ash and their correlations with mercury retention

Deng, Shuang; Shu, Yun; Li, Songgeng; Tian, Gang; Huang, Jiayu; Zhang, Fan

doi:10.1016/j.jhazmat.2015.09.032

Cited by 55 publications

(26 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two characteristic peaks were observed at 285.08 eV and 533.08 eV for both the carbon nano-network platform and the native graphite substrate. The peak positions 285.08 eV and 533.08 eV in both the carbon nano-network platform and the native graphite substrate can be ascribed to C1s and O1s, respectively3233. The quantitative analysis of the major elements as depicted from the graph (Fig.…”

Section: Resultsmentioning

confidence: 99%

Biofunctionalized 3-D Carbon Nano-Network Platform for Enhanced Fibroblast Cell Adhesion

Chowdhury

Tavangar

Tan

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Carbon nanomaterials have been investigated for various biomedical applications. In most cases, however, these nanomaterials must be functionalized biologically or chemically due to their biological inertness or possible cytotoxicity. Here, we report the development of a new carbon nanomaterial with a bioactive phase that significantly promotes cell adhesion. We synthesize the bioactive phase by introducing self-assembled nanotopography and altered nano-chemistry to graphite substrates using ultrafast laser. To the best of our knowledge, this is the first time that such a cytophilic bio-carbon is developed in a single step without requiring subsequent biological/chemical treatments. By controlling the nano-network concentration and chemistry, we develop platforms with different degrees of cell cytophilicity. We study quantitatively and qualitatively the cell response to nano-network platforms with NIH-3T3 fibroblasts. The findings from the in vitro study indicate that the platforms possess excellent biocompatibility and promote cell adhesion considerably. The study of the cell morphology shows a healthy attachment of cells with a well-spread shape, overextended actin filaments, and morphological symmetry, which is indicative of a high cellular interaction with the nano-network. The developed nanomaterial possesses great biocompatibility and considerably stimulates cell adhesion and subsequent cell proliferation, thus offering a promising path toward engineering various biomedical devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Biofunctionalized 3-D Carbon Nano-Network Platform for Enhanced Fibroblast Cell Adhesion

Chowdhury

Tavangar

Tan

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In addition, the redox reaction kinetics of Li 2 S n during the charge–discharge process may also be enhanced by the electrocatalysis effects of LDHs . The high anion exchange capability might also effectively entrap polysulfide anions in the cathode area, suppressing the dissolution of polysulfide into the electrolyte …”

Section: Strategiesmentioning

confidence: 99%

Chemical Immobilization Effect on Lithium Polysulfides for Lithium–Sulfur Batteries

Guo

et al. 2017

Small

168

View full text Add to dashboard Cite

Despite great progress in lithium-sulfur batteries (LSBs), great obstacles still exist to achieve high loading content of sulfur and avoid the loss of active materials due to the dissolution of the intermediate polysulfide products in the electrolyte. Relationships between the intrinsic properties of nanostructured hosts and electrochemical performance of LSBs, especially, the chemical interaction effects on immobilizing polysulfides for LSB cathodes, are discussed in this Review. Moreover, the principle of rational microstructure design for LSB cathode materials with strong chemical interaction adsorbent effects on polysulfides, such as metallic compounds, metal particles, organic polymers, and heteroatom-doped carbon, is mainly described. According to the chemical immobilizing mechanism of polysulfide on LSB cathodes, three kinds of chemical immobilizing effects, including the strong chemical affinity between polar host and polar polysulfides, the chemical bonding effect between sulfur and the special function groups/atoms, and the catalytic effect on electrochemical reaction kinetics, are thoroughly reviewed. To improve the electrochemical performance and long cycling life-cycle stability of LSBs, possible solutions and strategies with respect to the rational design of the microstructure of LSB cathodes are comprehensively analyzed.

show abstract

“…Comparing to the extraction of the anions from coal, the concentrations obtained by RAE and UAE indicated that fluoride condensed on fly ash. 1,25 This was expected since fluorine volatilizes during coal combustion. On the other hand, after combustion, the fluoride in fly ash was present in soluble forms.…”

Section: Determination Of Anions In Fly Ashmentioning

confidence: 99%

“…Some novel research indicated that chlorine and fluorine in fly ash are enriched on the surface and that both halogens on the ash surface consist of organic and inorganic functionalities. 1,2 The monitoring of sulphur, phosphorus and the halogens is of great importance for a number of reasons: with the exception of bromine, all of these elements are essential for the life of humans, animals and many plants; however, in elemental form and/or in certain compounds, they are highly toxic. All of the above-mentioned elements are vastly used in the chemical industry and, consequently, their effects on human health and the environment are important.…”

Section: Introductionmentioning

confidence: 99%

Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination

Tasic

Sredovic-Ignjatovic

Ignjatović

et al. 2016

JSCS

View full text Add to dashboard Cite

Three different techniques were applied for the aqueous extraction of anions from coal and fly ash: rotary mixer-and ultrasonic-assisted extraction with different duration time, and microwave-assisted extraction at different temperatures. Validation showed that the ion-chromatographic method was suitable for the analysis of anions in coal and fly ash extracts. The variations in the amounts of anions using different extraction times during rotary-assisted extraction were minimal for all investigated anions. The efficiency of ultrasound-assisted extraction of anions from coal depended on the sonication time and was highest at 30 min. The ultrasound-assisted extraction was less efficient for the extraction of anions from fly ash than rotary-assisted extraction. Increase of temperature in the microwave-assisted extraction had a positive effect on the amounts of all anions extracted from coal and sulphate from fly ash, while the amounts of fluoride and chloride in fly ash extracts decreased. The microwave-assisted extraction of coal at 150 °C was compared with standard ASTM methods, and results were in good agreement only for chloride. Changes in the pH value and conductivity during ultrasound-assisted extraction were measured in order to explain changes on the surface of coal particles in contact with water and different processes that occur under environmental conditions.

show abstract

Chemical forms of the fluorine, chlorine, oxygen and carbon in coal fly ash and their correlations with mercury retention

Cited by 55 publications

References 31 publications

Biofunctionalized 3-D Carbon Nano-Network Platform for Enhanced Fibroblast Cell Adhesion

Biofunctionalized 3-D Carbon Nano-Network Platform for Enhanced Fibroblast Cell Adhesion

Chemical Immobilization Effect on Lithium Polysulfides for Lithium–Sulfur Batteries

Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination

Contact Info

Product

Resources

About