Ion Flotation of Ytterbium Water-Salt Systems—An Innovative Aspect of the Modern Industry

Considering the ever-increasing role of rare-earth elements (REE) in the modern hi-tech field, their effective use has tremendous significance, although the production process is inevitably linked to the large volumes of industrial ammonia effluents and heavy metal wastes. In the process of metallurgical separation of metals, the emission of large volumes of noxious gases and radioactive substances is inevitable. Lean technogenic raw material processing is sensible under the condition of the development of non-waste technology. The lack of competent regulations governing the disposal of waste containing REE has an impact on adjacent territories, accumulating in water bodies and, as a result, in the human body. Such an impact cannot pass without a trace, however, the ambiguity of opinions in the scientific community regarding the toxic effects of REE on living organisms determines the relevance of a more detailed study of this issue. The study of ytterbium ions removal from aqueous standard test solutions by the adsorptive bubble method—ion flotation—was conducted. The experiments showed that by using the ion flotation method, the maximum removal of ytterbium (III) was achieved at pH = 8.30. It was shown that ytterbium (+3) distribution coefficients as a function of aqueous phase pH value in the process of ion flotation with sodium dodecyl sulphate were derived. The comparison of values of removal pH with those of hydrate formation pH allowed to conclude that ytterbium floate as basic dihydroxoytterbium dodecyl sulphate Yb(OH)2(C12H25OSO3).

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The Removal of Rare-Earth Metals from Water-Salt Systems – An Innovative Aspect of the Modern Industry

10.20944/preprints202111.0242.v1 ◽

2021 ◽

Author(s):

Olga Leonidovna Lobacheva

Keyword(s):

Rare Earth ◽

Sodium Dodecyl ◽

Raw Material ◽

Ion Flotation ◽

Water Salt ◽

Living Organisms ◽

Effective Use ◽

Salt Systems ◽

Theoretical Results

Considering the ever-increasing role of rare-earth elements (REE) in the modern hi-tech field, their effective use has a tremendous significance, although the production process is inevitably linked to the large volumes of industrial ammonia effluents and heavy metal wastes. In the process of metallurgical separation of metals, the emission of large volumes of noxious gases and radioactive substances is inevitable. Lean technogenic raw material processing is sensible under the condition of the development of non-waste technology. The lack of competent regulations governing the disposal of waste containing REE has an impact on adjacent territories, accumulating in water bodies and, as a result, in the human body. Such an impact cannot pass without a trace, however, the ambiguity of opinions in the scientific community regarding the toxic effects of REE on living organisms determines the relevance of a more detailed study of this issue. The paper presents experimental and theoretical results of studies of ion flotation in the aqueous solutions containing ytterbium cations and a surfactant as a collector - sodium dodecyl sulphate (NaDS).

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Ecological aspects of modernization of alcohol industry enterprises at the present stage of development

Environmental Problems ◽

10.23939/ep2020.03.179 ◽

2020 ◽

Vol 5 (3) ◽

pp. 179-184

Author(s):

Marianna Havryshko ◽

◽

Olena Popovych ◽

Halyna Yaremko ◽

◽

...

Keyword(s):

Wastewater Treatment ◽

Food Industry ◽

Ph Value ◽

Negative Impact ◽

Water Bodies ◽

Raw Material ◽

Present Stage ◽

Alcohol Industry ◽

Stage Of Development ◽

World Industry

At the present stage of development, the entire world industry has faced the problem of rational use of renewable natural resources, in particular the most efficient ways of wastewater treatment and the use of accumulated waste in the production process as a secondary raw material. In particular, the alcohol industry, as one of the components of food, medical, chemical and various industries,leads to the formation of huge amounts of waste, including wastewater. The food industry, like any other industry, has a negative impact on the environment. Water bodies are the most affected by the food industry. Almost the first place in terms of water consumption per unit of production is the production of alcohol. Consumption of large amounts of water leads to the formation of wastewater, which is highly polluted and adversely affects the environment. Due to the high chemical and biological consumption of oxygen, specific color and odor, suspended solids, low pH value, the purification of such waste in the filtration fields and discharge into water bodies is not possible. The purpose of our work is: 1) conducting the analysis of the alcohol industry potential in Ukraine in recent years, and methods of waste disposal as a potential source for the development of bioenergy. 2) environmental aspects of the alcohol industry modernization at present stage of development and implementation of modern wastewater treatment technologies.

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Storage Problems of Poplar Chips from Short Rotation Plantations with Special Emphasis on Fungal Development

Acta Silvatica et Lignaria Hungarica ◽

10.2478/v10303-012-0010-7 ◽

2012 ◽

Vol 8 (1) ◽

pp. 123-132 ◽

Cited By ~ 9

Author(s):

Zsuzsanna Horváth ◽

Béla Marosvölgyi ◽

Christine Idler ◽

Ralf Pecenka ◽

Hannes Lenz

Keyword(s):

Particle Size ◽

Health Risk ◽

Dry Matter ◽

Ph Value ◽

Wood Chips ◽

Raw Material ◽

Special Focus ◽

Fungal Development ◽

Short Rotation ◽

Fungal Particles

Abstract - There are several problems in storing wood chips freshly harvested from short rotation plantations, which result in quality losses as well as in dry matter and energy losses. The factors influencing the degradation of raw material are examined in this paper with special focus on fungal development. An excessive growth of fungi is connected to dry matter losses and also to an increased health risk during raw material handling. The following factors were measured during 6 months storage of poplar wood chips depending on particle size: box temperature, moisture content, pH-value, appearance of fungi in the storage and the concentration of fungal particles in the air. The results show a close connection between particle size, temperature and attack of fungi. During the storage mesophilic and termophilic species of the genera Alternaria, Aspergillus, Cladosporium, Mucor and Penicillium appeared. The concentration of fungal particles is the highest for fine chips and decreases in bigger particles. There was a special focus on the investigation of the properties of coarse chips (G 50), which represent a good compromise between handling, storage losses and health risk due to fungal development.

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New Insights into the Kinetics and Morphology of CO2 Hydrate Formation in the Presence of Sodium Dodecyl Sulfate

Energy & Fuels ◽

10.1021/acs.energyfuels.1c01494 ◽

2021 ◽

Author(s):

Xiao-Yan Deng ◽

Ying Yang ◽

Dong-Liang Zhong ◽

Xi-Yue Li ◽

Bin-Bin Ge ◽

...

Keyword(s):

Sodium Dodecyl Sulfate ◽

Sodium Dodecyl ◽

Hydrate Formation ◽

Dodecyl Sulfate

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A Novel Approach to Fabricate Foam Ceramics from Steel Slag

Advances in Materials Science and Engineering ◽

10.1155/2020/4649082 ◽

2020 ◽

Vol 2020 ◽

pp. 1-7

Author(s):

Yu Zheng ◽

Xudong Luo ◽

Jinlong Yang ◽

Wenlong Huo ◽

Chi Kang

Keyword(s):

Compressive Strength ◽

Ph Value ◽

Steel Slag ◽

Raw Material ◽

Solid Loading ◽

Insulation Material ◽

Ceramic Foams ◽

Novel Approach ◽

The Stability ◽

First Time

A novel approach is used for fabricating steel slag foam ceramics based on the particle-stabilized foaming method. In this work, steel slag was used as the raw material and propyl gallate (PG) was used as the surface modifier. For the first time, steel slag ceramic foams were successfully fabricated based on particle-stabilized foams. The results show that the stability of the ceramic foams was closely related to the pH value and PG concentration. The porosity and compressive strength could be controlled by changing the solid loading of steel slag and sintering temperature. The porosity of steel slag foam ceramics ranged from 85.6% to 62.53%, and the compressive strength was from 1.74 MPa to 10.42 MPa. The thermal conductivity of steel slag foam ceramics was only 0.067 W (m·K)−1, which shows that it could be used as a thermal insulation material.

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The Removal of Methylene Blue Dye from Aqueous Solutions Using Activated and Non-Activated Bentonites

Adsorption Science & Technology ◽

10.1260/026361703769645780 ◽

2003 ◽

Vol 21 (5) ◽

pp. 451-462 ◽

Cited By ~ 22

Author(s):

Sameer Al-Asheh ◽

Fawzi Banat ◽

Leena Abu-Aitah

Keyword(s):

Methylene Blue ◽

Ph Value ◽

Sodium Dodecyl ◽

Freundlich Isotherm ◽

Blue Dye ◽

Batch Adsorption ◽

Ionic Surfactant ◽

Methylene Blue Dye ◽

X Ray Diffraction ◽

Initial Ph

An improvement in the adsorption capacity of naturally available bentonite towards water pollutants such as Methylene Blue dye (MBD) is certainly needed. For this purpose, sodium bentonite was activated by two methods: (1) treatment with sodium dodecyl sulphate (SDS) as an ionic surfactant and (2) thermal treatment in an oven operated at 850°C. Batch adsorption tests were carried out on removing MBD from aqueous solution using the above-mentioned bentonites. It was found that the effectiveness of bentonites towards MBD removal was in the following order: thermal-bentonite > SDS-bentonite > natural bentonite. X-Ray diffraction analysis showed that an increase in the microscopic bentonite platelets on treatment with SDS was the reason behind the higher uptake of MBD. An increase in sorbent concentration or initial pH value of the solutions resulted in a greater removal of MBD from the solution. An increase in temperature led to an increase in MBD uptake by the bentonites studied in this work. The Freundlich isotherm model was employed and found to represent the experimental data well.

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Study on Influence of Silicate Morphology Based on pH Value

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.454.324 ◽

2012 ◽

Vol 454 ◽

pp. 324-328

Author(s):

Yan He ◽

Ya Jing Liu ◽

Yong Lin Cao ◽

Li Xia Zhou

Keyword(s):

Silicic Acid ◽

Ph Value ◽

Colorimetric Method ◽

Absorption Spectrometry ◽

Degree Of Polymerization ◽

Raw Material ◽

X Ray Diffraction ◽

X Ray ◽

Ph Values ◽

The Stability

Infra-red absorption spectrometry, X-ray diffraction observations and characterization tests based on silicon molybdenum colorimetric method were used to investigate the optimal pH value controlling the stability of the silicic acid form. The experiment process was done by using sodium silicate as raw material. The results showed that the solution of silicate influenced the polymerization. The active silicic acid solution with a certain degree of polymerization was obtained by controlling the pH values.

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A New Approach to Fluorescent Chemosensor of Cu2+ Ion

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.513-517.65 ◽

2014 ◽

Vol 513-517 ◽

pp. 65-69

Author(s):

Xiao Jun Hu ◽

Xin Yan Hu ◽

Zhi Zhang

Keyword(s):

Aqueous Solution ◽

Electron Transfer ◽

Self Assembly ◽

Ph Value ◽

Sodium Dodecyl ◽

Fluorescence Emission ◽

Fluorescent Chemosensor ◽

Dynamic Quenching ◽

Transfer Effects ◽

New Approach

According to the principle of dynamic quenching a new ON-OFF fluorescent chemosensor for Cu2+ions was designed, this chemosensor was composed of p-tert-butylthiacalix [arene (TCA),sodium dodecyl sulfate (SDS) and perylene through the form of self-assembly in aqueous solution. Addition of Cu2+ions could result in a quenching of the fluorescence emission of perylene inside micelles, which due to intramicellar complex-fluorophore electron-transfer or energy-transfer effects induced by the complexation of TCA with the Cu2+ions.The experimental results indicated that: Under the condition of TCA/perylene was 800/1, SDS concentration was 150mmol/L and pH value above 9, according to the fluorescence quenching ,within a certain range of the concentration of Cu2+ion can be linearly determined.

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