Study of Influence Factors on Wettability of Coal Dust

2013 ◽  
Vol 724-725 ◽  
pp. 1050-1053
Author(s):  
Yin Yu Sun ◽  
Rong Chun Nie ◽  
Lin Lin Zhang
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Fourier Transform ◽  
Coal Dust ◽  
Sodium Dodecyl ◽  
Influence Factors ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Tween 80 ◽  
Benzene Sulfonate ◽  
Dodecyl Benzene Sulfonate

In this study, coal samples of experimental come from the raw coal of Wangfenggang and Qidong. Sodium dodecyl benzene sulfonate (SDBS), sodium dodecyl sulfate (SDS), water-reducing admixture NF and Tween-80 are choosed as surfactants. The influence factors on wettability of coal dust were characterized by contact angle meter, fourier transform infrared spectroscopy (FTIR) and surface tension experiment. The research shows that the effect of solution on wettability of coal dust is mainly depended on the surface structure of coal dust, type and concentration of solution.

Preparation, Surface Activity and Application of Fluoro-Spreading Agent

2015 ◽  
Vol 1101 ◽  
pp. 322-329
Author(s):  
Hong Xin Shi ◽  
Yu Teng Fu ◽  
Hai Min Shen ◽  
Hong Ke Wu
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Surface Activity ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Benzene Sulfonate ◽  
H Nmr ◽  
Film Forming ◽  
Dodecyl Benzene Sulfonate

Ammonium perfluoro-2,5-bis (trifluoromethyl)-3,6-dioxopelargonate (FY1) was synthesized from perfluoro-2,5-bis (trifluoromethyl)-3,6-dioxopelargonic acid and ammonia in ether, and was characterized by IR and 1H NMR. Its surface activity and spreading performance on gasoline were investigated in detail. The critical micelle concentration (CMC) of FY1 in aqueous solution was 0.25 g / L, and the surface tension at CMC (ڃcmc) was 17.25 mN / m. The aqueous solution of FY1 could spread on the surface of gasoline, but the aqueous solution of FY1 mixed with sodium dodecyl benzene sulfonate (SDBS), sodium dodecyl sulfate (SDS), n-octanol, 2-ethyl hexanol or VF respectively could not spread on gasoline. However, the aqueous solution of two or three components of FY1 with anion fluoro-surfactant Intechem-1 and SDS or n-octanol could spread on gasoline, and the biggest covering degree on gasoline reached 80.2% in 10min. It can decrease the volatilization of gasoline and can be employed to develop a new aqueous film-forming foam for oil-fire fighting.

Effects of Spacer Length on the Surface Properties of Cationic Gemini Fluorosurfactants

2015 ◽  
Vol 671 ◽  
pp. 210-216 ◽  
Author(s):  
Xin Yin Wang ◽  
Chang Jian Dai ◽  
Xiao Yun Liu ◽  
Tao Chen ◽  
Ji Ping Wang
Keyword(s):  
Surface Tension ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Lower Surface ◽  
Benzene Sulfonate ◽  
Spacer Length ◽  
Hydrophobic Chain ◽  
Ft Ir ◽  
Dodecyl Benzene Sulfonate ◽  
Lower Surface Tension

A novel class of cationic gemini fluorosurfactants with different spacer and same hydrophobic chain were synthesized. They were structurally characterized by NMR (1H and 19F), FT-IR, ESI-MS and elemental analysis. The equilibrium surface tensions were studied. The results showed that the gemini fluorosurfactants with the shorter spacer displayed higher surface activity, lower surface tension (21.48 mN/m) can be reached. Besides, the synergistic properties of these synthesized gemini fluorosurfactants with sodium dodecyl benzene sulfonate (SDBS) were investigated.

scholarly journals Controlling of two destructive zooplanktonic predators in Chlorella mass culture with surfactants

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Xiaobin Wen ◽  
Aoqi Zhang ◽  
Xiaoyan Zhu ◽  
Lin Liang ◽  
Yan Huo ◽  
...  
Keyword(s):  
Mass Culture ◽  
Chemical Method ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Biofuel Production ◽  
Benzene Sulfonate ◽  
Microalgae Biomass ◽  
Mass Cultures ◽  
Dodecyl Benzene Sulfonate ◽  
Raceway Ponds

Abstract Background Predatory flagellates and ciliates are two common bio-contaminants which frequently cause biomass losses in Chlorella mass culture. Efficient and targeted ways are required to control these contaminations in Chlorella mass cultivation aiming for biofuel production especially. Results Five surfactants were tested for its ability to control bio-contaminations in Chlorella culture. All five surfactants were able to eliminate the contaminants at a proper concentration. Particularly the minimal effective concentrations of sodium dodecyl benzene sulfonate (SDBS) to completely eliminate Poterioochromonas sp. and Hemiurosomoida sp. were 8 and 10 mg L−1, respectively, yet the photosynthesis and viability of Chlorella was not significantly affected. These results were further validated in Chlorella mass cultures in 5, 20, and 200 m2 raceway ponds. Conclusions A chemical method using 10 mg L−1 SDBS as pesticide to control predatory flagellate or ciliate contamination in Chlorella mass culture was proposed. The method helps for a sustained microalgae biomass production and utilization, especially for biofuel production.

Spontaneous Formation of DTAB/SDBS Vesicles

2013 ◽  
Vol 734-737 ◽  
pp. 2505-2508
Author(s):  
Lin Lin Cui ◽  
Hua Nan Guan
Keyword(s):  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Ammonium Bromide ◽  
Benzene Sulfonate ◽  
Complex Formulation ◽  
Structure And Morphology ◽  
Spontaneous Formation ◽  
Dodecyl Benzene Sulfonate ◽  
Dodecyl Trimethyl Ammonium Bromide ◽  
The Stability

Dodecyl trimethyl ammonium bromide/sodium dodecyl benzene sulfonate (DTAB/SDBS) complex formulation of scale effect on the spontaneous formation of vesicles and the influence of different factors on the stability of vesicles were discussed, structure and morphology of vesicles were observed.

scholarly journals Remediation of Cr(VI)/Cd(ІІ)-Contaminated Groundwater with Simulated Permeable Reaction Barriers Filled with Composite of Sodium Dodecyl Benzene Sulfonate-Modified Maifanite and Anhydride-Modified Fe@SiO2@Polyethyleneimine: Environmental Factors and Effectiveness

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Jingqing Gao ◽  
Yalin Zhai ◽  
Zhenzhen Huang ◽  
Peng Ren ◽  
Jianlei Gao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Composite Material ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Contaminated Groundwater ◽  
Column Experiments ◽  
Benzene Sulfonate ◽  
Dodecyl Benzene Sulfonate

A composite material of sodium dodecyl benzene sulfonate- (SDBS-) modified maifanite and anhydride-modified Fe@SiO2@PEI (PEI) was used as an adsorbent for the removal of hexavalent chromium (Cr(VI)) and bivalent cadmium (Cd(II)) from groundwater by using column experiments and simulated PRB test. In this study, the optimum proportion of SDBS-modified maifanite and anhydride-modified Fe@SiO2@PEI was 5 : 1. In the column experiments, it was found that the penetration time increased with the increase of the initial concentrations (30, 60, and 90 mg/L) and the decrease of the flow rates (5.45, 10.9, and 16.35 mL/min) at an influent pH of 6.5 ± 0.3 . It was also obtained that the removal rates of Cr(VI) and Cd(ІІ) reached 99.93% and 99.79% at an initial Cr(VI) and Cd(ІІ) concentration of 30 mg/L with the flow rate of 10.9 mL/min, respectively, at 6 h. Furthermore, excellent removal effectiveness of Cr(VI) and Cd(ІІ) (85.94% and 83.45%, respectively) was still achieved in simulated PRB test at a flow rate of 5.45 mL/min with the heavy metal solution concentration of 5.0 ± 0.5  mg/L (Cr(VI) and Cd(II) concentration were, respectively, 5.0 ± 0 . 5 mg/L); and the adsorbent had not completely failed by the end of the trial. Yoon-Nelson model was successfully applied to predict the breakthrough curves for the assessment of composite material heavy metal removal performance and was in good agreement with the experimental data of the heavy metal removal efficiency. The strong removal ability of the adsorbent could be attributed to the fact that maifanite with a large diameter can provide support and increase the permeability coefficient and porosity and that zero-valent iron (ZVI) can convert Cr(VI) to Cr(III) and improve the adsorption capacity of maifanite. The obtained results suggested that the novel PRB fillers have great significance for preventing and controlling Cr(VI)/Cd(ІІ)-contaminated groundwater.

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