Research on Flocculation Behavior in Diethyl Phthalate Removal from Water by Using Anionic Flocculants P(AM-AA-AMPS)

2013 ◽  
Vol 361-363 ◽  
pp. 726-729 ◽  
Author(s):  
Jiang Ya Ma ◽  
Huai Li Zheng ◽  
Xiao Min Tang ◽  
Wei Chen ◽  
Wen Wen Xue ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Ph Value ◽  
Optimal Conditions ◽  
Single Factor ◽  
Initial Ph ◽  
Stirring Time ◽  
Flocculation Process ◽  
Scanning Electron ◽  
Significant Factors ◽  
Factor Technique

Flocculation process with P(AM-AA-AMPS) as flocculants was used for the DEP removal from water. The structure and morphologies of the flocculants was characterized by scanning electron microscope (SEM). To maximize the DEP removal efficiency, single factor technique and an orthogonal array L9 (34) were employed to optimize the factors of dosage, initial pH value and stirring time. The results show that the optimal conditions are dosage of 10mg·L-1, initial pH value of 9 and stirring time of 6min. Moreover, flocculants dosage is the best significant factors in DEP removal.

Preparation and Thermodynamics of Nickel-Phosphor Deposition on Surface of Quartz Optical Fiber by Electroless Plating

2011 ◽  
Vol 322 ◽  
pp. 432-435
Author(s):  
Bo Quan Jiang ◽  
Zheng Qiang Xiao
Keyword(s):  
Electron Microscope ◽  
Optical Fiber ◽  
Ph Value ◽  
Fiber Surface ◽  
Electroless Nickel ◽  
Optimal Conditions ◽  
Single Factor ◽  
Quartz Optical Fiber ◽  
Scanning Electron ◽  
Strength Of Adhesion

The electroless nickel-phosphor deposition on quartz optical fiber surface was carried out by single factor test. The optimum NiSO4·6H2O, NaH2PO2·H2O , C3H6O2 and H3BO3 concentrations, pH value and temperature were determined to be: 0.1331 mol/L, 0.3019 mol/L, C3H6O20.3761 mol/L, H3BO3 0.4520 mol/L, 4.5 and 84°C, respectively. Scanning electron microscope, stereomicroscope and thermal shock rest were applied to measure the morphology and strength of adhesion of the deposited Ni-P coating. The result showed that a desired Ni-P coating with good smoothness and adhesion was prepared under the optimal conditions. The thermodynamic models were established and proven by the current study.

Preparation of Mirabilite Microparticles via the Anti-Solvent Recrystallization Process

2020 ◽  
Vol 20 (5) ◽  
pp. 3071-3077
Author(s):  
Da-Wei He ◽  
Zhou Wang
Keyword(s):  
Electron Microscopy ◽  
Average Particle Size ◽  
Average Particle ◽  
Recrystallization Process ◽  
Solvent Ratio ◽  
Mixing Ratio ◽  
Optimal Conditions ◽  
Single Factor ◽  
Stirring Time ◽  
Scanning Electron

Mirabilite microparticles was prepared via the anti-solvent recrystallization process. The solvent-antisolvent system was constructed by adding saturated aqueous solution of mirabilite into absolute ethanol. The best mixing mode and the mixing ratio, the stirring time and the droplet acceleration were selected by single factor experiments. Scanning electron microscopy (SEM) was used to characterize the generated mirabilite microparticles. The optimal one-factor conditions were solvent-anti-solvent ratio of 1:4, stirring for 40 min and droplet acceleration of 2 mL·min−1. Under the optimal conditions, the mirabilite microparticles with complete hexahedral form and uniform surface were obtained, the average particle size was about 5 μm.

scholarly journals Hydrothermal Synthesis of Various Shape-Controlled Europium Hydroxides

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 529
Author(s):  
Hongjuan Zheng ◽  
Kongjun Zhu ◽  
Ayumu Onda ◽  
Kazumichi Yanagisawa
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ph Value ◽  
Hydrothermal Temperature ◽  
X Ray ◽  
Hydrothermal Reactions ◽  
Starting Solution ◽  
Initial Ph ◽  
Shape Controlled ◽  
Scanning Electron

Eu(OH)3 with various shape-controlled morphologies and size, such as plate, rod, tube, prism and nanoparticles was successfully synthesized through simple hydrothermal reactions. The products were characterized by XRD (X-Ray Powder Diffraction), FE-SEM (Field Emission- Scanning Electron Microscopy) and TG (Thermogravimetry). The influence of the initial pH value of the starting solution and reaction temperature on the crystalline phase and morphology of the hydrothermal products was investigated. A possible formation process to control morphologies and size of europium products by changing the hydrothermal temperature and initial pH value of the starting solution was proposed.

Mechanism and Application Prospects of Sewage Sludge Conditioning with Fly-Ash

2014 ◽  
Vol 878 ◽  
pp. 679-688 ◽  
Author(s):  
Min Yue ◽  
Meng Zhang ◽  
Bin Liu ◽  
Chun Yuan Ma
Keyword(s):  
Electron Microscope ◽  
Fly Ash ◽  
Sewage Sludge ◽  
Specific Resistance ◽  
Raw Materials ◽  
Single Factor ◽  
Sludge Cake ◽  
Application Prospects ◽  
Scanning Electron ◽  
Skeleton Structure

The effects of fly-ash on dewatering of sewage sludge were studied according to sludge specific resistance (SSR), dehydrated speed, and moisture content of sludge cake as investigation indexes through single-factor experiments by contrasting to cationic polyacrylamide (PAM). The results showed that SSR kept decreasing with the rising of fly-ash dosage. When the dosage of fly-ash was 0.02 g/(ml sludge), SSR reduced by 65.2%. When the dosage of fly-ash was over 0.03 g/(ml sludge) adding with PAM, the dehydrated speed will be increased by three fourths. Through the analyses of Zeta potential, scanning electron microscope (SEM) observation, combined with the dehydration experiments, it was thought that the mechanism of fly-ash on dewatering of sewage sludge was that their particles evenly dispersed in sludge floc skeleton structure and thus decreased the SSR and improved the permeability of the sludge cake. The disposal of dewatering sludge and recycling approaches after fly-ash condition were also discussed. They can be used as landfill or as raw materials in building fields.

The Treatment of Copper-Containing Wastewater by Electrolysis-Enhanced Micro-Electrolysis Fluidized Bed Method

2014 ◽  
Vol 926-930 ◽  
pp. 4402-4405
Author(s):  
Qiang Zhan ◽  
Xiao Jun Xu ◽  
Jing Zhao ◽  
Tian Guo Li
Keyword(s):  
Electron Microscope ◽  
Reaction Time ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Copper Ions ◽  
Sem Analysis ◽  
Solution Ph ◽  
Operation Conditions ◽  
Initial Ph ◽  
Scanning Electron

The effect of electrolysis-enhanced micro-electrolysis fluidized bed technology on treating cooper-containing wastewater had been systematic researched. Operation conditions including applied flow rate, voltage, solution pH and reaction time on the copper ions (Cu2+) removal effect, had been studied scanning electron microscope (SEM) analysis had been used to characterize the surface features of copper crystals in the fillers surface. The results show that the Cu2+ mainly removed by electrochemical deposition, the optimum operation conditions are: flow rate is 22mm/s, voltage is 12V, initial pH=4, the response time of 30 min.

scholarly journals Optimal Conditions for Acquiring Cathodoluminescence (CL) Images Using a Cold-Field Emission Scanning Electron Microscope

2006 ◽  
Vol 12 (S02) ◽  
pp. 1524-1525 ◽  
Author(s):  
JL Mey ◽  
AV Klaus
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Field Emission ◽  
Optimal Conditions ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005

Screening of a Flocculant-Producing Strain and Optimal Conditions for Production of Bioflocculant

2011 ◽  
Vol 183-185 ◽  
pp. 829-833
Author(s):  
Jia Hong Wang ◽  
Jun Fei Wei ◽  
Hong Rui Ma
Keyword(s):  
Culture Conditions ◽  
Kaolin Clay ◽  
Optimal Conditions ◽  
Single Factor ◽  
Clay Suspension ◽  
Factors Affecting ◽  
Dilution Plate ◽  
Flocculating Activity ◽  
Initial Ph ◽  
High Possibility

A bioflocculant-producing strain M-3 with high flocculating activity was isolated from soil by conventional panel lineation and dilution-plate methods. It was preliminarily identified as Aspergillus based on its morphological and physiological characteristics of colony. The single factor experiments were conducted to optimize cultivating factors affecting flocculating activity, the optimal culture conditions were found to be as follows: glucose 10 g/L, glutamate 2 g/L, cultivating time 36 h, cultivating temperature 37 oC, shaking speed 120 r/min, initial pH 10. The strain could produce high effective flocculants with flocculating activity of 98.3% for kaolin clay suspension, which afforded high possibility of its practical use.

Removal of Silver (I) from Aqueous Solutions by Chitosan/Carbon Nanotube Nanocomposite Beads

2014 ◽  
Vol 893 ◽  
pp. 166-169 ◽  
Author(s):  
Walaikorn Nitayaphat ◽  
Thanut Jintakosol
Keyword(s):  
Adsorption Equilibrium ◽  
Ph Value ◽  
Dosage Level ◽  
Maximum Adsorption Capacity ◽  
Optimal Conditions ◽  
Adsorption Efficiency ◽  
Composite Adsorbent ◽  
Adsorbent Dosage ◽  
Composite Beads ◽  
Initial Ph

Chitosan/CNT nanocomposites were prepared by blending chitosan with carbon nanotubes (CNTs) and forming composite beads. The composites were used as Ag+adsorbents. Adsorption equilibrium experiments were carried out as a function of contact time, CNTs concentration, pH value, and adsorbent dosage level. The equilibrium time of Ag+adsorption was found to be 160 min. Composite adsorbent had the highest adsorption efficiency when the weight of CNTs was 0.01 wt%. The maximum Ag+removal took place at the initial pH value of 3. The optimum adsorbent dosage for Ag+removal was 5 g. Under above optimal conditions the maximum Ag+removal was 99.7%. The adsorption isotherm of chitosan/CNT nanocomposite bead agreed well with the Langmuir model. The maximum adsorption capacity was 0.393 mg/g.

Fabrication of Accurate Diamond - Metal Composite Cutting Blade by Electrotyping Method

2006 ◽  
Vol 304-305 ◽  
pp. 57-61
Author(s):  
L.L. Fang ◽  
Bing Lin Zhang ◽  
Ning Yao
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ph Value ◽  
Photoemission Spectroscopy ◽  
Metal Composite ◽  
X Ray Diffraction ◽  
Electrolytic Solution ◽  
X Ray ◽  
Scanning Electron

In this paper, we report that the experimental results of fabricated diamond-metal composite film. Electrotyping method was used to deposit the thick film. During the deposition, low internal stress electrolytic solution, the electric current density of cathode, PH value, temperature, the distance between cathode and anode, the pretreatment of motherboard cathode were selected simultaneously. It was found that stirring strongly affected the quality of the film. Especially stirring velocity affected the distribution of diamond grains. Scanning electron microscope (SEM), X-ray photoemission spectroscopy (XPS) and X-ray diffraction (XRD) were used to measure the surface morphology, the crystal microstructure, diamond grains distribution and the chemical environment of the film.

Microwave-Assisted Hydrothermal Preparation of YVO4:Eu3+ Phosphor

2010 ◽  
Vol 663-665 ◽  
pp. 417-420
Author(s):  
En Guo Wang
Keyword(s):  
Electron Microscope ◽  
Ph Value ◽  
Doping Amount ◽  
Hydrothermal Preparation ◽  
X Ray ◽  
Microwave Assisted ◽  
Preparation Conditions ◽  
Microwave Hydrothermal ◽  
Microwave Hydrothermal Method ◽  
Scanning Electron

YVO4:Eu3+ phosphors were prepared by microwave hydrothermal method in this work. YVO4:Eu3+ phosphors were probed by photoluminescence (PL), X-ray powder diffraction (XRD) and scanning electron microscope (SEM). The effects of different preparation conditions on the photoluminescence, the structure and the morphology of YVO4:Eu3+ phosphors were studied. The experiment results show that the pH value and the Eu3+ doping amount have some important effect on the photoluminescence and the morphology of YVO4:Eu3+phosphors.

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