Research of Mechanisms of Copper Ions Removal out of Sewage of Machine-Building Productions by Combined Reagent Based on Industrial Wastes

2017 ◽  
Vol 265 ◽  
pp. 851-855 ◽  
Author(s):  
L.A. Porozhnyuk ◽  
N.S. Lupandina ◽  
E.V. Porozhnyuk
Keyword(s):  
Copper Ions ◽  
Mineralogical Composition ◽  
Machine Building ◽  
Industrial Wastes ◽  
Alternative Methods ◽  
Embryotoxic Action ◽  
Copper Compounds ◽  
Sewage Purification

The need for sewage purification of machine-building production from copper compounds which possess toxic, allergic, cancerogenic, gonadotropny and embryotoxic action, has been justified. The methods of studying of component and mineralogical composition of wastes, which are used for purification of model mortars, have been given. Some methods of purification of mortars from copper ions have been considered. The need for the search of alternative methods of purification, taking into consideration the composition and properties of the purified environments, and also taking into account the possible reset of purified sewage into natural reservoirs, has been shown. It has been revealed, that application of calcium- containingwaste as reagent won't help to additional alkalization of natural reservoirs. Prospects of use of regional industrial wastes for extraction of copper ions out of model mortarshave been shown. The mechanism of purification of model drains from copper ions by a combined reagent has been described.

Electron Spin Resonance Study of the Interaction of Tetramethylthiuram Disulphide (TMTD) with Rubber and Related Compounds

1961 ◽  
Vol 34 (1) ◽  
pp. 318-318 ◽  
Author(s):  
S. E. Bresler ◽  
B. A. Dogadkin ◽  
E. N. Kazbekov ◽  
E. M. Saminskii˘ ◽  
V. A. Shershnev
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Copper Ions ◽  
Benzene Solution ◽  
Copper Acetate ◽  
Electron Spin Resonance Study ◽  
Radical Mechanism ◽  
Paramagnetic Resonance ◽  
Copper Compounds ◽  
Bivalent Copper ◽  
Electron Paramagnetic

Abstract In the article by Dogadkin and Shershnev electron paramagnetic resonance spectra produced in the laboratory of Prof. S. E. Bresler are put forward to confirm the radical mechanism of the interaction of TMTD with raw rubber in the process of vulcanization. After this paper had been printed we learned of the work of B. R. McGarvey and H. M. McConnel, in which analogous spectra were observed in solutions containing bivalent copper ions. As a result it is suggested that the electron paramagnetic resonance spectra of stocks of natural rubber with TMTD are affected by admixtures of copper compounds. The amount of copper calculated from the magnitude of the resonance spectrum amounts to 0.1% by weight in relation to the TMTD. The same spectrum is observed on heating a benzene solution of copper acetate and TMTD. Its intensity increases sharply and irreversibly on heating the solution to 100°. corresponding to 10% of the copper contained in the solution.

Staphylococcus equorum Isolated from Seabed as Potential Biotool to Cr(VI) Remediation

2013 ◽  
Vol 825 ◽  
pp. 524-527 ◽  
Author(s):  
Paulina Pradel ◽  
Carolina Hernández ◽  
Mario Tello ◽  
Maria Paz Villarroel ◽  
Gino Corsini ◽  
...  
Keyword(s):  
Ribosomal Rna ◽  
Marine Bacterium ◽  
Inhibitory Concentration ◽  
Selective Pressure ◽  
Oxidation Potential ◽  
Industrial Wastes ◽  
Alternative Methods ◽  
Staphylococcus Equorum ◽  
Morphologic Analysis ◽  
Gram Positive Cocci

Normal 0 21 false false false ES-CL X-NONE X-NONE MicrosoftInternetExplorer4 Cr(VI)is frequently used in several industrial activities, due to its uncontrolled spill this contaminant has generated serious damage to the environment: chromium hexavalent has a high oxidation potential and is able to go through biological membranes. As consequence Cr(VI)is described as a persistent contaminant with a high toxicity. It has been searched for alternative methods to remediate or detoxify environments contaminated with Cr(VI). The use of microorganisms able to absorb or reduce this type of contaminant is discerned as a potential biotool for remediation of metals-enriched industrial wastes. In order to isolate and identify environmental microorganisms with this capacity, we isolated a bacterium named LMA-2 with a selective pressure of 60 mM of Cr(VI) from contaminatedmarine sediment. In the morphologic analysis, this marine microorganism evidenced that corresponds to a Gram-positive cocci. This resistant bacterium has a minimal inhibitory concentration for Cr(VI) of 750 mM. The characterization and identification of this strain was made through 16S ribosomal RNA gene, this result revealed that it corresponds to Staphylococcus equorum. Assays using atomic absorption spectrophotometer (AAS) shows that this strain is able to ireduce the concentration of soluble Cr(VI) The capacity of this strain to remediate Cr(VI) was determined in 142.8 mg/L at 10 h of exposition. Our results showed the high resistance and the ability for Cr(VI) remediation by Staphylococcus equorum. These results suggest that this marine bacterium could be a prospect for future use as a biofilter for seabed marine environment decontamination. st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}

scholarly journals Formation and hydration of eco-friendly cement using industrial wastes as raw materials

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
K. Baltakys ◽  
T. Dambrauskas ◽  
D. Rubinaite ◽  
R. Siauciunas ◽  
A. Grineviciene
Keyword(s):  
Raw Materials ◽  
Early Stage ◽  
Mineralogical Composition ◽  
Initial Mixture ◽  
Heat Evolution ◽  
Sem Analysis ◽  
Industrial Wastes ◽  
Exothermic Reactions ◽  
Early Stage Hydration ◽  
Primary Compounds

AbstractIn this work, the optimal conditions of the synthesis of eco-friendly cement by using industrial wastes as well as the peculiarities of its early stage hydration were investigated. The eco-friendly cement was synthesized within the 1000–1250 °C temperature range when the targeted composition was 60% of belite, 20% of ye’elimite, and 20% of brownmillerite. It was determined that the optimal sintering temperature for eco-friendly cement is 1100 °C because the primary compounds were fully reacted, and hydraulic active compounds were dominant in the products. Microcalorimetry analysis was performed for the investigation of early stage hydration. The best results of hydration were obtained with the eco-friendly cement which was produced by using mixtures with silica gel waste: three exothermic reactions were observed in the heat evolution curve, while the cumulative heat was equal to 264 J/g after 72 h. Additionally, the sequence of compounds formation during the first day of hydration was analyzed. It was determined that the composition of the initial mixture impacts the hydration rate of synthetic eco-friendly cement; however, it did not affect the mineralogical composition of the hydration products. These results were confirmed by XRD, STA, and SEM analysis.

scholarly journals Cluster Calculations of Hyperfine Interactions in Superconducting Copper Compounds

2000 ◽  
Vol 55 (1-2) ◽  
pp. 247-255
Author(s):  
P. F. Meier ◽  
T. A. Claxton ◽  
P. Hüsser ◽  
S. Plibersek ◽  
E. P. Stoll
Keyword(s):  
Copper Ions ◽  
Hyperfine Interactions ◽  
Electric Field Gradients ◽  
Copper Compounds ◽  
Field Gradients ◽  
Cluster Calculations ◽  
Spin Polarized ◽  
Quadrupole Resonance ◽  
University Of Zurich ◽  
The University

This paper discusses first-principles cluster investigations on the electronic structure of YBa2Cu3Ü7 and La2CuO4 performed at the University of Zürich. In particular, electric field gradients have been calculated at the copper sites and their dependence on applying uniaxial strain is studied. Magnetic hyperfine interactions have been evaluated from spin-polarized calculations, and the transfer of spin density from neighboring copper ions is explained. An interpretation is given of the nuclear quadrupole resonance spectra in doped La2CuO4.

Functionalized Mn2+ Doped Zinc Sulfide Quantum Dots as a Metal Ion Sensor for Industrial Wastes

2013 ◽  
Vol 284-287 ◽  
pp. 138-142 ◽  
Author(s):  
Guo Feng Chen ◽  
Hsiao Pin Tsai ◽  
Ping Shan Lai ◽  
Ming Yuan Liao
Keyword(s):  
Quantum Dots ◽  
Metal Ion ◽  
Fluorescence Probe ◽  
Limit Of Detection ◽  
Copper Ions ◽  
Linear Range ◽  
Industrial Wastes ◽  
Quenching Effect ◽  
Significant Difference ◽  
Sensitivity And Selectivity

L-cysteine capped Mn2+-doped ZnS quantum dots are prepared as a fluorescence probe for the detection of heavy metal contaminants, such as As2O42-, Cd2+, CrO42-, Ni2+, Zn2+, Ca2+, Fe2+, Cu2+, Pb2+, Co2+ and Mn2+ ions. The results show L-cysteine capped Mn2+-doped ZnS quantum dots exhibit good sensitivity and selectivity for the detection of copper ions. The relationship between the detection limit, linear range and the concentration of quantum dots are examined. The optimum fluorescence sensor is obtained at the L-cysteine-ZnS QDs concentration of 2 mg/mL and pH 7.0 in phosphate buffer. The limit of detection for this sensor system is 0.2 ppm with the linear range between 0.5 and 20 ppm. The effect of foreign ions from Mn2+, Fe2+, Co2+ and Ni2+ for the detection of Cu2+ solution is also evaluated. The results show there is no significant difference on the measurement of quenching effect.

Effect of Granulometric Component Composition in Cellular Concrete on Cement Consumption Rate

2019 ◽  
Vol 945 ◽  
pp. 76-79 ◽  
Author(s):  
L.M. Vesova
Keyword(s):  
Building Materials ◽  
Mineralogical Composition ◽  
Component Composition ◽  
Industrial Wastes ◽  
Raw Material ◽  
Cement Matrix ◽  
Material Base ◽  
Mineral Additive ◽  
Partition Structure ◽  
Cellular Concrete

The use of local natural and technogenic raw materialsallows expansion of the raw material base for producing the building materials and reduction of production cost. Creation of low energy-intensive technologies for producing the building materials is a priority for the construction industry. The chemical and mineralogical composition of industrial wastes makes it possible to use them for producing the low-clinker or clinker-free composite binders. Secondary resources can be used as an active mineral additive that would allow to reduce the cement consumption. The properties of cellular concrete depend on the formed cement matrix structure, the strength of the inter-pore partitions. Quality can be managed by directional formation of the mechanical framework. Providing the necessary granulometric composition of the cellular concrete components is decisive for the mechanical framework formation. The inter-pore partition structure in the cellular concrete is a developed silicate matrix formed by hydration products and a siliceous component. Therefore, when designing this structure, an analogy with ordinary dense concrete is quite possible. The basic principle for designing the concrete composition consists in creating a dense packaging of the constituent components.

The Development of a Purification Method of Sewage from Chromium (VI) by Iron-Containing Waste

2018 ◽  
Vol 284 ◽  
pp. 761-766
Author(s):  
L.A. Porozhnyuk ◽  
E.V. Porozhnyuk
Keyword(s):  
Metal Content ◽  
Component Composition ◽  
Machine Building ◽  
Industrial Wastes ◽  
Purification Method ◽  
Reduction Reactions ◽  
Chromium Vi ◽  
Ferrous Metals ◽  
Oxidation Reduction

The article presents the results of reagent purification of sewage from machine building industries from chromium (VI) ions. The relevance of research is connected with the expansion of the spectrum of effective reagents at the expense of the use of industrial wastes [1-3]. The component composition of abrasive waste formed from grinding of ferrous metals with a metal content of less than 50% is studied here. Conditions have been developed for the oxidation-reduction reactions necessary in the reagent purification of sewage from chromium (VI). It is shown that purification with an efficiency of more than 80% takes place within 60 minutes.

METODA PENGHILANGAN LOGAM MERKURI DI DALAM AIR LIMBAH INDUSTRI

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Nusa Idaman Said
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Ion Exchange ◽  
Industrial Wastewater ◽  
Exchange Process ◽  
Toxic Substance ◽  
Chemical Oxidation ◽  
Industrial Wastes ◽  
Alternative Methods ◽  
Ion Exchange Process

Industry is a potential source of water pollution, it produces pollutants that are extremely harmful to people and the environment. Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans. Inorganic industrial wastes are more difficult to control and potentially more hazardous Industries discharge a variety of toxic compounds and heavy metals. The most pollutans heavy metals are Lead, Cadmium, Copper, Chromium, Selenium,  Mercury, Nickel, Zinc, Arsen and Chromium. Heavy metals are dangerous because they tend to bioaccumulate. Mercury for example, causes damages to the brain and the central nervous system, causes psychological changes and makes development changes in young children. Normally Mercury is a toxic substance which has no known function in human biochemistry. There are several methods to eliminate or remove mercury in water such as chemical oxidation process, ion exchange process, adsorption process, an electrochemical process, reverse osmosis process and other alternative methods likes biosorption. Each method has strengths and weaknesses, therefore to choose the method of removing of mercury in wastewater depending on pollutants conditions such as concentrations of mercury in wastewater, types of mercury, mercury concentrations in treated water, land availability, flow rate of wastewater will be processed and other parameters. This paper discusses several methods of removal of mercury heavy metals in industrial wastewater such as chemical precipitation and oxidation processes, adsorption and ion exchange process. Keywords : water pollution, heavy metals, mercury, industrial wastewater, removal methods.

scholarly journals The use of industrial wastes from machine-building enterprises as packing materials for small-sized absorbers for gas emissions purification

2019 ◽  
Vol 298 ◽  
pp. 00031 ◽  
Author(s):  
Nikolay Merentsov ◽  
Alexander Persidskiy ◽  
Vitaliy Lebedev ◽  
Alexander Golovanchikov
Keyword(s):  
Experimental Data ◽  
High Efficiency ◽  
Machine Building ◽  
Packing Material ◽  
Industrial Wastes ◽  
Packing Materials ◽  
Gas Emissions ◽  
Environmental Cleaning ◽  
Gas Cleaning ◽  
Building Enterprises

The paper covers the prospects to use industrial wastes from machine-building enterprises, appearing while machining various steel grades, as packing materials for industrial absorbers for environmental cleaning processes of gas emissions. The article provides obtained and processed in the criterial way experimental data in hydrodynamics of a packing material sample from metal working machines wastes appearing while treating Aisi 316Ti steel bars; packing material according to the classification method for processing experimental data λ=f(Rem) is oriented to the absorption process during selective gas cleaning in environmental equipment. The authors have compared the studied packing material to the packing that are widely used in industries. The authors have studied the main experimentally confirmed hydrodynamic effects indicating the high efficiency of the proposed packing material. The authors have made calculations for a small-sized industrial absorber for cleaning gas emissions with the use of the studied packing material.

scholarly journals Research of combined reagent schemes of activation leaching of gold from oxidized ores of the Malmyzh field

2020 ◽  
Vol 192 ◽  
pp. 02020
Author(s):  
Tatiana Konareva ◽  
Maxim Kirilchuk
Keyword(s):  
Sulfuric Acid ◽  
Copper Ions ◽  
Porphyry Copper ◽  
Alternative Methods ◽  
Silicate Matrix ◽  
Low Concentration ◽  
Copper Leaching ◽  
Process Heating ◽  
Thiosulfate Leaching ◽  
Copper Ores

The results of studies of the cyanide and an alternative methods for leaching gold and silver from oxidized ores of the Malmyzh field are presented. The possibility of recovering gold and silver from oxidized porphyry copper ores by thiosulfate solutions in agitation and percolation modes without intensifying the process – heating the solutions and adding copper ions – has been shown. Also, in a separate cycle – copper leaching with low-concentration sulfuric acid-sulfite solutions with additional opening of the silicate matrix with ammonium hydrofluoride – has been studied. The possibility of using ammonia-thiosulfate leaching in percolation mode has been investigated.

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