scholarly journals Flotation separation of strontium via phosphate precipitation

2017 ◽  
Vol 75 (11) ◽  
pp. 2520-2526 ◽  
Author(s):  
Luong H. V. Thanh ◽  
J. C. Liu
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Separation Efficiency ◽  
Ph Value ◽  
Sodium Dodecyl ◽  
Molar Ratio ◽  
Ammonium Bromide ◽  
Charged Surface ◽  
Alkaline Ph ◽  
Cetyl Trimethyl Ammonium ◽  
Positively Charged

Flotation separation of strontium (Sr) from wastewater via phosphate precipitation was investigated. While 37.33% of Sr precipitated at highly alkaline pH in the absence of PO43−, it completely precipitated as Sr3(PO4)2 at a molar ratio ([PO43−]:[Sr2+]) of 0.62 at a lower pH value. The presence of Ca2+ hindered Sr precipitation, yet it could be overcome by increasing the PO43− dose. Sodium dodecyl sulfate (SDS) was a better collector for dispersed air flotation of Sr3(PO4)2 than cetyl trimethyl ammonium bromide, or mixed collector systems of SDS and saponin. The highest separation efficiency of 97.5% was achieved at an SDS dose of 40 mg/L. The main mechanism in the precipitate flotation is adsorption of anionic SDS on the positively charged surface of colloidal Sr3(PO4)2 via electrostatic interaction. SDS enhanced the aggregation of Sr3(PO4)2 precipitates as the size increased from 1.65 to 28.0 μm, which was beneficial to separation as well.

Influence of Different Dispersants on the Dispersion Property of Nano-Aluminium Powders

2011 ◽  
Vol 71-78 ◽  
pp. 122-125 ◽  
Author(s):  
Ling Li Song ◽  
Ren Yuan Zhang ◽  
Ling Bo Mao ◽  
Wen Jie Zhu ◽  
Miao Yan Zheng
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Ultrasonic Vibration ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Sodium Dodecyl ◽  
Dispersion Property ◽  
Ammonium Bromide ◽  
Aluminum Powders ◽  
Ultrasonic Time ◽  
Dodecyl Sulfate ◽  
Cetyl Trimethyl Ammonium

The influences of dispersant type, supersonic time and concentration on the dispersion property of the nano-aluminium powders in glycol water were systematically studied by using Sodium dodecyl sulfate (SDS)，cetyl trimethyl ammonium bromide (CTAB) and sodium hexa metah posphate（SHMP）as dispersants. During the first stage of the experiments, influences of dispersant type and ultrasonic time with these dispersants were evaluated. The next stage of the study was focused on SHMP concentration. The influence of SHMP concentration was assessed. The results show that with the increasing of ultrasonic time, the dispersion property of nano-aluminum powders first increases and then decreases, and SHMP is the best one. The excellent dispersing condition on the dispersion property of nano-aluminium is: 5g/L SHMP and 50 min ultrasonic vibration.

scholarly journals Morphology-Controlled Synthesis Of SrTiO3 Nanocube By Capping Agent-Assisted Solvothermal Method

Molekul ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. 25
Author(s):  
Yulia Eka Putri ◽  
Alvionita Alvionita ◽  
Rini Rahma Yanti ◽  
Diana Vanda Wellia
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Molar Ratio ◽  
Head Group ◽  
Ammonium Bromide ◽  
Capping Agent ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Transmission Electron ◽  
Cetyl Trimethyl Ammonium

The synthesis of SrTiO3 nanocubes have been carried out by solvothermal process using cetyl trimethyl ammonium bromide (CTAB) as capping agent to control the particles morphology. The condition of the synthesis was obtained at 160 ºC for 24 hours with molar ratio of SrTiO3 and capping agent was 1 : 1. The X-ray diffraction (XRD) pattern shows that SrTiO3 adopts a perovskite structure with a higher intensity of 110 at 2q:32.33º and the crystallite size calculated from FWHM was found to be 41 nm. Fourier transform infrared (FTIR) spectrum shows a shift in particular absorption band attributed the interaction between SrTiO3 particles surface and the head group of CTAB molecules. Transmission electron microscopy (TEM) image shows the cubic-like particles of SrTiO3, this indicatesthat CTAB successfully functions as capping agent on the synthesis of SrTiO3.

Spontaneous Formation of CTAB/SDBS Vesicles

2014 ◽  
Vol 953-954 ◽  
pp. 1230-1233 ◽  
Author(s):  
Lin Lin Cui ◽  
Li Juan Fu
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Ammonium Bromide ◽  
Complex Formulation ◽  
Structure And Morphology ◽  
Spontaneous Formation ◽  
Dodecyl Benzene Sulfonate ◽  
Cetyl Trimethyl Ammonium ◽  
The Stability

Cetyl trimethyl ammonium bromide/sodium dodecyl benzene sulfonate (CTAB/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.

Spontaneous Formation of CTAB/SLS Vesicles

2014 ◽  
Vol 953-954 ◽  
pp. 1234-1237
Author(s):  
Lin Lin Cui
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Scale Effect ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Complex Formulation ◽  
Structure And Morphology ◽  
Spontaneous Formation ◽  
Cetyl Trimethyl Ammonium ◽  
The Stability

Cetyl trimethyl ammonium bromide/sodium dodecyl sulfate (CTAB/SLS) 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.

Synthesis and Infrared Emisstivity Properties of CdS/ZnS/Al Composite Material with Microemulsions

2011 ◽  
Vol 311-313 ◽  
pp. 135-139
Author(s):  
You Jun Wang ◽  
Xu Liang Lü ◽  
An Zhong Deng ◽  
Dong Li
Keyword(s):  
Composite Material ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Ph Value ◽  
Ammonium Bromide ◽  
Infrared Emissivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Al Composite ◽  
Reverse Microemulsions ◽  
Cetyl Trimethyl Ammonium

CdS/ZnS core-shell structure was synthesized with reverse microemulsions in the system of cetyl trimethyl ammonium bromide (CTAB)/ C5H12O/ C6H14/H2O and precipitator mixed thioacetamide (TAA )and ethylenediamine (EDA), which was coated on the surface of Al particles. The characteristics of the composite particles were investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM )and Fourier transform infrared (FTIR). Emissivity of composite material in 8~14 µm waveband was 0.2574. The results showed composite material had lower infrared emissivity when PH value was between10 and 11, mol ratio of Zn/Cd was 0.3, and the reaction temperature was 70°C.

scholarly journals Preparation of Porous Hydroxyapatite Using Cetyl Trimethyl Ammonium Bromide as Surfactant for the Removal of Lead Ions from Aquatic Solutions

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1617
Author(s):  
Silviu-Adrian Predoi ◽  
Carmen Steluta Ciobanu ◽  
Mikael Motelica-Heino ◽  
Mariana Carmen Chifiriuc ◽  
Monica Luminita Badea ◽  
...  
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Morphological Changes ◽  
Low Cost ◽  
Lead Ions ◽  
Ammonium Bromide ◽  
Porous Hydroxyapatite ◽  
X Ray ◽  
Composition And Structure ◽  
Cetyl Trimethyl Ammonium ◽  
Co Precipitation

In the present study, a new low-cost bioceramic nanocomposite based on porous hydroxyapatite (HAp) and cetyl trimethyl ammonium bromide (CTAB) as surfactant was successfully obtained by a simple chemical co-precipitation. The composition and structure of the HAp-CTAB were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) spectrometer, and N2 adsorption/desorption analysis. The capacity of HAp-CTAB nanocomposites to remove the lead ions from aqueous solutions was studied by adsorption batch experiments and proved by Langmuir and Freundlich models. The Pb2+ removal efficiency of HAp-CTAB biocomposite was also confirmed by non-destructive ultrasound studies. The cytotoxicity assays showed that the HAp-CTAB nanocomposites did not induce any significant morphological changes of HeLa cells after 24 h of incubation or other toxic effects. Taken together, our results suggests that the obtained porous HAp-CTAB powder could be used for the decontamination of water polluted with heavy metals, such as Pb2+.

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