scholarly journals Studying the Effect of Potassium Amyl Xanthate Surfactant on Fe, Cu and U Ions for the Pretreatment of Abu Zeneima Sulphate Leach Liquor

2021 ◽  
Author(s):  
Sherien Hussein Ahmed ◽  
Entesar Mohamed El Gammal ◽  
Mostafa Ibrahim Amin ◽  
Walid Mohamed Yousef
Keyword(s):  
Experimental Data ◽  
Ftir Spectroscopy ◽  
Uranium Content ◽  
Sample Volume ◽  
Leach Liquor ◽  
Batch Experiments ◽  
Optimum Conditions ◽  
Xrf Analysis ◽  
Time Sample ◽  
Stirring Time

In this study, batch experiments were performed to study the behavior of potassium amyl xanthate surfactant on Fe, Cu and U ions for the pretreatment of Abu Zeneima sulphate leach liquor. Various parameters, such as amount of potassium amyl xanthate, pH, stirring time, sample volume to potassium amyl xanthate mass (v/m ratio) and temperature were tested to determine the optimum conditions. The numerical results obtained support the experimental data on decreasing the iron and copper values where 0.1 g potassium amyl xanthate could remove 86.8 mg Fe and 0.98 mg Cu from the studied sulphate solution with no effect on uranium content. FTIR spectroscopy and XRF analysis were used for investigation.

scholarly journals Epoxy resin modified with amine as an effective complexing agent of metal cations

2013 ◽  
Vol 11 (11) ◽  
pp. 1723-1728 ◽  
Author(s):  
Joanna Kurczewska ◽  
Grzegorz Schroeder
Keyword(s):  
Infrared Spectroscopy ◽  
Epoxy Resin ◽  
Complexing Agent ◽  
Batch Experiments ◽  
Optimum Conditions ◽  
High Effectiveness ◽  
Initial Concentration ◽  
Stirring Time ◽  
Amine Groups ◽  
Effects Of Temperature

AbstractA simple synthesis of a material capable of metal cation removal is proposed. The material was a derivative of epoxy resin containing amine groups. It is insoluble in water and in this study it was characterized by elemental analysis and infrared spectroscopy. The sorbent obtained was tested for its ability to remove coper(II), cadmium(II) and lead(II) from water solutions. The tests were performed for different concentrations of metal ions (10–200 mg L−1) and at different pH (2.0–9.0). The effects of temperature and stirring time, as well as reusability of the sorbent were also studied in batch experiments. In the optimum conditions, the decrease in the cation concentration in aqueous solutions was observed in the order Cu>Pb>Cd but for each ion the decrease was at least 50% of the initial concentration. The sorbent has demonstrated high effectiveness in cation sorption and after regeneration it can be applied repeatedly in the process described.

scholarly journals BIOSORPTION OF METHYLENE BLUE BY WASTE APRICOT SHELLS FROM FOOD INDUSTRY

2018 ◽  
Vol 4 (7) ◽  
Author(s):  
Tatjana Šoštarić ◽  
Marija Petrović ◽  
Jelena Milojković ◽  
Jelena Petrović ◽  
Marija Stanojević ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Food Industry ◽  
Fruit Juice ◽  
Waste Waters ◽  
Batch Experiments ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Monolayer Adsorption

In this paper, the removal of methylene blue (MB) from aqueous solution by biosorption ontoapricot shellshas been investigated through batch experiments. Apricot shells were chosen as alocally available and abundant waste from fruit juice industry. Methylene blue is common pollutantof waste waters from textile industry.The influence of initial MB concentration on biosorption process has been studied. Theexperimental data have been analysed using Langmuir and Freundlichisotherm models. TheLangmuir model better fits to experimental data, which explain monolayer adsorption. Maximumbiosorption capacity is 24,31 mg/g. A comparison of the biosorption capacity of waste apricot shellswith biosorption capacities of similar adsorbents previously investigated indicates that apricotshells could be a promising biosorbent for removal of MB from aqueous solution.

The EAWAG Bio-P module for activated sludge model No. 3

2002 ◽  
Vol 45 (6) ◽  
pp. 61-76 ◽  
Author(s):  
H. Siegrist ◽  
L. Rieger ◽  
G. Koch ◽  
M. Kühnl ◽  
W. Gujer
Keyword(s):  
Experimental Data ◽  
Phosphorus Removal ◽  
Pilot Plant ◽  
Municipal Wastewater ◽  
Endogenous Respiration ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Batch Experiments ◽  
Standard Parameter ◽  
Biological Phosphorus

An additional module for the prediction of enhanced biological phosphorus removal is presented on the basis of a calibrated version of ASM3. The module uses modified processes from ASM2d but neglects the fermentation of readily degradable substrate. Biomass decay is modeled in the form of endogenous respiration as in ASM3. The glycogen pool and biologically induced P-precipitation is not taken into account. The module was systematically calibrated with experimental data from various batch experiments, a full-scale WWTP and a pilot plant treating Swiss municipal wastewater. A standard parameter set allowed all data to be simulated.

Removal of ammonium as struvite using magnesite as a source of magnesium ions

2010 ◽  
Vol 5 (1) ◽  
Author(s):  
H. M. Huang ◽  
X. M. Xiao ◽  
L. P. Yang ◽  
B. Yan
Keyword(s):  
Reaction Time ◽  
Reaction Rate ◽  
Low Cost ◽  
Magnesium Ions ◽  
Batch Experiments ◽  
Optimum Conditions ◽  
Ammonium Removal ◽  
Time Required ◽  
Solid Liquid ◽  
Operation Cost

In this study, magnesite was used as a low-cost magnesium source to remove ammonium as struvite from the wastewater generated in the rare-earth elements separation process. Since the solubility of magnesite is low, before it was used it was decomposed to magnesia which has a higher reaction rate than magnesite. To optimize its usage, the optimum temperature of decomposition of magnesite and the time required for the process were determined by batch experiments to be 700 °C and 1.5 h, respectively. Besides, batch experiments using the residues of magnesite decomposed under optimum conditions were undertaken to investigate the effects of solid (magnesite)/liquid (wastewater) ratio and reaction time on ammonium removal as struvite. Results indicated that for the solid/liquid ratios tested and for a reaction time of 6 h, phosphorus concentrations fell steeply from the initial 9105 mg/L to a range of 198.8–29.8 mg/L, and ammonium concentrations from the initial 5287 mg/L to 540–520 mg/L. An economic analysis conducted indicated that the operation cost of the struvite process could be reduced by about 34% using decomposed magnesite instead of pure MgCl2.

scholarly journals Pemisahan Itrium dengan Cara Ekstraksi Menggunakan Solven TOPO

EKSPLORIUM ◽  
2019 ◽  
Vol 39 (2) ◽  
pp. 105
Author(s):  
Tri Handini ◽  
I Made Sukarna ◽  
Anisa Dwi Yuniyanti
Keyword(s):  
Rare Earth ◽  
Distribution Coefficient ◽  
Separation Factor ◽  
Extraction Efficiency ◽  
Extraction Process ◽  
Optimum Conditions ◽  
Extractant Concentration ◽  
Liquid Liquid Extraction ◽  
Oxide Concentration ◽  
Stirring Time

ABSTRAK Telah dilakukan proses pemisahan itrium dengan cara ekstraksi menggunakan solven TOPO. Tujuan dari penelitian ini adalah untuk mengetahui kondisi optimum pengaruh variasi konsentrasi ekstraktan, waktu pengadukan, dan keasaman umpan logam tanah jarang serta mengetahui koefisien distribusi (Kd), faktor pisah (FP), dan efisiensi ekstraksi (%), dengan metode ekstraksi cair-cair. Umpan yang digunakan adalah logam tanah jarang dari pasir senotim. Ekstraktan yang digunakan dalam penelitian adalah TOPO (tri-n-oktilfosfina oksida). Kadar itrium (Y), disprosium (Dy), dan gadolinium (Gd) ditentukan menggunakan spektrometer pendar sinar-X. Kondisi optimum yang diperoleh dari penelitian proses ekstraksi ini meliputi: konsentrasi ekstraktan 20% TOPO dalam kerosin, waktu pengadukan 15 menit, keasaman umpan 0,5 M. Nilai koefisien distribusi yang diperoleh Y = 5,61; Dy = 2,06; Gd = 0,99. Efisiensi ekstraksi Y = 85,13%, Dy = 67,80%, Gd = 50,17% sedangkan faktor pisah Y-Dy = 2,7186 dan Y-Gd = 5,6861. ABSTRACT Separation process of yttrium by extraction using TOPO solvents has been done. The purpose of this study is to  find out the optimum condition of the variation effect of extractant concentration, stirring time, and acidity of the rare earth feed and to determine the distribution coefficient, separation factor, and extraction efficiency (%), using the liquid-liquid extraction method. The feed used  were rare earth  elements of xenotime sand. The extractant used in the research were TOPO (tri-n-octylphosphine oxide). Concentration of yttrium (Y), disprosium (Dy), and gadolinium (Gd) were  determined using X-ray fluorescene spectrometer. Optimum conditions of the extraction process obtained from this study were: TOPO extractant concentration in kerosene 20%, stirring time 15 minutes, acidity of feed 0.5 M. Obtained value of distribution coefficient  Y = 5.61; Dy = 2.06; Gd = 0.99. For extraction efficiency Y = 85.13%, Dy = 67.80%, Gd = 50.17% whereas separation factor Y-Dy = 2.7186 and Y-Gd = 5.6861.

scholarly journals Application of Commercial Adsorbent for Rare earth elements - Uranium Mutual Separation and Purification

2017 ◽  
Vol 6 (6) ◽  
pp. 238-254 ◽  
Author(s):  
Ahmed Hussien Orabi ◽  
Kamal Rabia ◽  
Elsayed Elshereafy ◽  
Amany Salem
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Uranium Content ◽  
Separation And Purification ◽  
Optimum Conditions ◽  
Uranium Removal ◽  
Pure Product ◽  
Equilibrium Data ◽  
Order Rate Equation ◽  
Commercial Adsorbent

The treatment of rare earths sulfate liquor contaminated with traces of uranium as radioactive contaminates utilizing lewatit mono plus M500 was studied. Adsorption behavior was studied by batch experiments to determine the optimum conditions for uranium removal. The obtained equilibrium data were found to be satisfactory fitted with Langmuir isotherm and the second order rate equation. Also, elution process was achieved by 2M NaCl/1M HCl solution and the reuse of sorbent remains appreciable. A marketable pure product of rare earth oxide was prepared in addition to pure sodium diuranate containing total uranium content of the starting REEs cake.

Study Regarding the Presence of Zn(II) in Thermal Waters for Cosmetic Use

2017 ◽  
Vol 68 (7) ◽  
pp. 1565-1567
Author(s):  
Mihaiela Andoni ◽  
Germaine Savoiu Balint ◽  
Georgeta Maria Simu ◽  
Ramona Amina Popovici ◽  
Horia Tudor Stanca
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resin ◽  
Ion Exchanger ◽  
Thermal Waters ◽  
Experimental Investigations ◽  
Optimum Conditions ◽  
Residual Concentration ◽  
Zinc Removal ◽  
Stirring Time ◽  
Zinc Concentrations

The experimental investigations aimed to determine the optimal conditions for the process of zinc removal from thermal waters with the PUROLITE S920 ion exchange resin. It was determined the residual zinc concentration dependence on the amount of ion exchanger at different initial zinc concentrations in solution and different stirring times. The optimum conditions for achieving a residual concentration below 1 mg/L are: ion exchange rate 1.6 g/L, stirring time about 45 min. The PUROLITE S920 ion exchanger can be successfully used to remove very small amounts of zinc ions from the solution.

Qualitative XRF Analysis with Pattern Recognition

1989 ◽  
Vol 33 ◽  
pp. 603-613
Author(s):  
Lo. I. Yin ◽  
Stephen M. Seltzer
Keyword(s):  
Experimental Data ◽  
Pattern Recognition ◽  
Chemical Composition ◽  
Quantitative Information ◽  
Pattern Recognition Method ◽  
Geological Samples ◽  
Recognition Method ◽  
Pattern Recognition Techniques ◽  
Xrf Analysis ◽  
Pattern Recognition Approach

AbstractIn many applications of energy-dispersive XRF analysis, quantitative information concerning the chemical composition of the samples is not required. Rather, one is interested in whether a given sample is similar to some reference material or whether the chemical composition is changing from one sample to the next. We have investigated the use of pattern-recognition techniques in such applications. It will be demonstrated with experimental data that the pattern-recognition approach is extremely simple and fast. It uses only a single parameter, the normalized correlation coefficient, and can be applied directly to raw data. The efficacy of the method is illustrated with Si(Li) spectra of geological and pigment samples, and proportional counter spectra of geological samples. The pattern-recognition method should be ideally suited for field XRF applications, and the algorithm can be easily implemented on a personal computer.

Study on Energy Consumption Distribution of High Ferric-Based Silicon Coagulant Using Fractal Dimension

2013 ◽  
Vol 295-298 ◽  
pp. 1389-1392
Author(s):  
Lei Cheng ◽  
Yan Zhen Yu ◽  
Juan Tan ◽  
Yong Sun
Keyword(s):  
Fractal Dimension ◽  
Energy Consumption ◽  
Industrial Wastewater ◽  
Removal Rate ◽  
Orthogonal Experiment ◽  
Lead Ion ◽  
Lead Removal ◽  
Optimum Conditions ◽  
Stirring Time ◽  
Rapid Stirring

High ferric-based silicon coagulant is a kind of new self-made coagulant. The high ferric content was introduced in the preparation process of the coagulant, and the effect was good in dealing with simulated industrial wastewater with lead. The beaker test indicated that the lead removal rate reached the highest 96.48% when the rapid stirring speed was 300r/min and stirring time was 1min, low stirring speed was 80r/min and stirring time was 15min, the dosage of the coagulant was 3.5ml/L. And the fractal dimension of flocs was 1.67674 under that optimum conditions. The low stirring stage was divided into three different stages in the orthogonal experiment of energy consumption, and the result showed that the optimum combination of flocculation was: velocity gradient G1=67.7s-1, stirring time T1=4min; G2=57.8 s-1, T2=5min; G3=23.9s-1, T3=6min. The removal rate of lead ion improved and the energy consumption decreased when the flocculation was divided into different stages. The relations between fractal dimension and energy consumption distribution can be obtained by calculated the fractal dimension of different stages. The stirring speed can be controlled and the flocs can be prevented from being broken by observing the flocs.

scholarly journals A novel betaine type asphalt emulsifier synthesized and investigated by online FTIR spectrophotometric method

2015 ◽  
Vol 21 (1-1) ◽  
pp. 113-121 ◽  
Author(s):  
Laishun Shi ◽  
Meijie Sun ◽  
Na Li ◽  
Bochen Zhang
Keyword(s):  
Experimental Data ◽  
Lauric Acid ◽  
Chemical Structure ◽  
Ftir Analysis ◽  
Mass Ratio ◽  
Optimum Conditions ◽  
Reaction Conditions ◽  
Optimum Reaction ◽  
Ftir Technique ◽  
Online Ftir

A novel betaine type asphalt emulsifier 3-(N,N,N-dimethyl acetoxy ammonium chloride)-2-hydroxypropyl laurate was synthesized after three steps by the reaction of lauric acid, epichlorohydrin, dimethylamine and sodium chloroacetate. The optimum reaction conditions were obtained for the synthesis of the first step of 3-chloro-2-hydroxypropyl laurate. The esterification yield reaches 97.1% at the optimum conditions of reaction temperature 80?C, reaction time 6 h, feedstock mole ratio of epichlorohydrin to lauric acid 1.5, mass ratio of catalyst to lauric acid 2%. The chemical structure of the product was characterized by FTIR and 1H NMR. The first synthesis step of 3-chloro-2-hydroxypropyl laurate was monitored by online FTIR technique. The by-product was detected by the online FTIR analysis. Based upon the experimental data, a plausible reaction mechanism was proposed for the reaction. The CMC of the objective product has a lower value of 7.4?10-4 mol/L. The surface tension at CMC is 30.85 mN/m. The emulsifier is a rapid-set asphalt emulsifier.

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