scholarly journals Wastewater treatment from ions of heavy and non-ferrous metals by ion-exchange adsorption

2016 ◽  
pp. 44-51
Author(s):  
Sevara Babazhanova ◽  
Raushan Nurdillayeva
Keyword(s):  
Wastewater Treatment ◽  
Ion Exchange ◽  
Cation Exchanger ◽  
Optimal Conditions ◽  
Cadmium Ions ◽  
Ferrous Metals ◽  
Exchange Adsorption ◽  
Non Ferrous Metals ◽  
Optimized Conditions ◽  
The Impact

This article presents the results of experimental research on wastewater treatment from ions of heavy and non-ferrous metals by ion exchange adsorption. The object of investigation was a model solution containing ions of heavy and non-ferrous metals and prepared of wastewater from Turkestan locomotive depot. As a sorbent, phosphorus–acidic cationite KRF-10P was used. The impact of the cation exchanger mass, reaction time of cationite and temperature of the solution on the degree of wastewater treatment from ions of heavy and non-ferrous metals (Zn2+, Pb2+, Cd2+) were studied. On the basis of experiments, optimal conditions of wastewater treatment from ions of heavy and non-ferrous metals were established: mKRF-10P = 2.0 g, t = 1.0 h, T = 55°C. At the optimized conditions, the degree of wastewater treatment from zinc ions reached 96.1%, the degree of removal of lead ions reached 89%, the degree of removal of cadmium ions reached 95%. Experimental results showed the possibility of wastewater treatment from ions of heavy and nonferrous metals by ion exchange adsorption using phosphorus–acidic cationite KRF-10P.

scholarly journals HYGIENIC EFFICIENCY OF WASTEWATER TREATMENT USING POLYMERIC ION-EXCHANGE MATERIALS

2019 ◽  
pp. 40-44
Author(s):  
S.V. Skupnevskiy
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Ion Exchange ◽  
Industrial Wastewater ◽  
High Speed ◽  
Cation Exchanger ◽  
Metal Salts ◽  
Flotation Reagents ◽  
Exchange Processes ◽  
Heavy Metal Salts

Polymeric fibrous ion-exchange materials based on polyacrylonitrile matrix, produced in the form of cation-exchanger KN-1 and anion-exchanger AS-1 were the object of the study. We studied the sorption properties of these materials to heavy metal salts and products of their chemical transformation with flotation reagents. According to obtained results, exchange processes have high speed and materials are characterized by high value of absorption – up to 250 mg/g. The introduction of a cascade filtration scheme ensures the treatment of highly contaminated multicomponent industrial wastewater to levels that comply with the hygienic requirements. The advantages of the materials under study are the possibility of their repeated regeneration (by acid and alkali) without losing their original properties and the possibility of concentrating the desorbed metals for the purpose of their recycling again.

scholarly journals Synthesis and investigation of properties of new chelate sorbent for water purification

2019 ◽  
Vol 63 (3) ◽  
pp. 298-303
Author(s):  
V. I. Grachek ◽  
A. P. Polikarpov ◽  
A. A. Shunkevich ◽  
R. V. Martsynkevich ◽  
O. I. Isakovich
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Vapor Phase ◽  
Water Purification ◽  
Cation Exchanger ◽  
Ion Exchanger ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Effective Sorbent ◽  
Nitron Fiber

Polymer analogous transformations of a “nitron” fiber were established and a new amino carboxylic fibrous cation exchanger FIBAN X-2 was obtained. It is shown that FIBAN X-2 is an effective sorbent of heavy and non-ferrous metals from multi-ionic aqueous solutions, regardless of the method of fiber amination. The cation exchanger obtained by amination of a “nitron” fiber in the vapor phase absorbs Mn+2 twice as much as the ion exchanger obtained by amination in the aqueous solution.

The Flocculating Properties of Cationic-Starch-Graft-Polyacrylamide and its Nano Magnetic Modified Product

2012 ◽  
Vol 581-582 ◽  
pp. 723-726
Author(s):  
Guang Hua Wang ◽  
Ming Dong Sun ◽  
Wen Bing Li ◽  
Yun Zhou Lu ◽  
Xue Qin Liu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Chemical Oxygen Demand ◽  
Salt Solution ◽  
Oxygen Demand ◽  
Coking Wastewater ◽  
Optimal Conditions ◽  
Cationic Starch ◽  
Solution System ◽  
The Impact ◽  
Magnetic Fe3o4

A series of Cationic-Starch-graft-Polyacrylamide (CP) copolymers have been synthesized in salt solution system under microwave radiation and modified by Nano magnetic Fe3O4 (NMCP). The two products were prepared as flocculants for coking wastewater treatment. The impact of CP dosage, NMCP dosage, PFS dosage, CTAB dosage and pH on flocculating effects was investigated. The result indicated that CP and NMCP could obviously improve flocculation performance without adjusting pH of wastewater. The optimal conditions were CP dosage 3 mg/L, NMCP dosage 20 mg/L, PFS dosage 1.2 g/L, CTAB dosage 60 mg/L. Under such circumstances, the removal rates of turbidity (NTU), chemical oxygen demand (CODCr) and colortity were 95.24%, 57.69% and 89.06%, respectively.

scholarly journals Influence of non-ferrous metals on the structural quality of the high-alloy mild steel 20X2H4A billets received by centrifugal electroslag remelting

2020 ◽  
pp. 65-73
Author(s):  
P. I. Papkovskiy ◽  
A. I. Valko ◽  
S. G. Sandomirskii
Keyword(s):  
Quantitative Measure ◽  
Structural Heterogeneity ◽  
Structural Quality ◽  
The Real ◽  
Ferrous Metals ◽  
Metallic Inclusions ◽  
Steel Castings ◽  
Formation Of Cracks ◽  
Non Ferrous Metals ◽  
The Impact

The problem of the formation of cracks and the conditions of their origin in the cast of metal products have been widely studied in world practice, but the real mechanism of this process is not yet clear enough that it could be applied in production. Hot cracks – one of the most common and the most detrimental defects of steel castings, leading to a significant increase in the cost of products. The formation of hot cracks in steel castings depends on many factors, including the chemical composition of steel, the presence of non-metallic inclusions and gases, conditions of deoxidation and solidification of steel, etc. Therefore, special attention in the real conditions of production should be given to the metallurgical side of the issue. There is no quantitative measure of steel purity in the books of steel, which is divided into chemical, defined by the chemical analysis, and metallographic, defined by the content of non-metallic inclusions. The effect of the general purity of steel on the characteristics of destruction is studied sufficiently, but the data on the individual impact of impurities is very incomplete.In many respects, pure steel has a clear advantage over steel with harmful impurities. This applies to all mechanical properties associated with destruction or processes occurring on the edge of grains. The cardinal way of obtaining cleaner steel, including the reduction of impurities of non-ferrous metals, is the use of pure original charge mixture.The article discusses the topical problem of cracking formation after chemical-thermal treatment in the material of sun gears of the second row of quarry dump trucks BELAZ, obtained by the method of CESR rolled steel 20X2H4А, the possible impact of small concentrations of non-ferrous metals (Pb, Zn, Sn, Bi, As, Se) on the development of external and internal cracks in castings and on structural heterogeneity of steel after CESR.The obtained results allowed to draw conclusions about the impact of non-ferrous metals on the formation of cracks in castings and to establish their limited quantitative characteristics. Based on the results, measures have been proposed to minimize the impact of small amounts of non-ferrous metals on the formation of cracks in castings.

scholarly journals Sorption properties of new fibrous chelate ion exchanger

2020 ◽  
Vol 56 (2) ◽  
pp. 206-211
Author(s):  
V. I. Grachek ◽  
A. A. Shunkevich ◽  
A. P. Polikarpov ◽  
O. I. Isakovich
Keyword(s):  
Cation Exchanger ◽  
Elevated Temperatures ◽  
Polypropylene Fiber ◽  
Ion Exchanger ◽  
Sorption Properties ◽  
Grafted Copolymer ◽  
High Speeds ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Effective Sorbent

The sorption properties of new iminodiacetate fibrous cation exchanger FIBAN XC-1 synthesized on a chemically resistant matrix of polypropylene fiber with a grafted copolymer of styrene and divinylbenzene, which can withstand elevated temperatures and aggressive environments, were studied. It was shown that the fibrous chelate ion exchanger FIBAN XC-1 is an effective sorbent of heavy and non-ferrous metals from multi-ionic aqueous solutions under static and dynamic conditions. It was found that the cation exchanger operates at high speeds up to 20 column volumes / min in water purification from copper and lead ions (purification from Cu2+ – 82 % and purification from Pb2+– 65 %). It was found that the fibrous chelate ion exchanger FIBAN XC-1 is easily regenerated and does not lose its sorption and mechanical properties in the sorption– regeneration cycles.

scholarly journals GLOBAL NON-FERROUS METALLURGY RESOURCES MARKET

2020 ◽  
pp. 109-130
Author(s):  
Elizaveta Rastyannikova ◽  
Keyword(s):  
Ferrous Metallurgy ◽  
Raw Materials ◽  
Ferrous Metal ◽  
Consumer Electronics ◽  
Raw Material ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
The One ◽  
New Applications ◽  
The Impact

Since the beginning of the XXI century, the raw material of non-ferrous metallurgy began to acquire new outlines. First, due to the growing demand for resources from the rapidly developing countries of Asia (China, India, South Korea), the volume of world production and international flows of both raw ore and ore dressing – concentrates have increased. Secondly, the concentration of countries that produce raw materials on the one hand and consume them on the other has increased. The article is devoted to comparative statistical analysis of international flows of raw materials of non-ferrous metals. The leading countries in the world exporting non-ferrous metal ores and countries importing them have been identified. The impact of new applications of non-ferrous metals on increasing international trade, such as the expansion of the production of batteries for electromobile and consumer electronics, the development of nuclear energy, etc., is highlighted.

scholarly journals MODIFICATION TECHNOLOGY OF MONTMORILLONITE BY POLYIONENES

2018 ◽  
Vol 26 (1) ◽  
pp. 1-8
Author(s):  
Kostyantyn M Sukhyy ◽  
Elena Belyanovskaya ◽  
Mikhaylo P Sukhyy
Keyword(s):  
Ion Exchange ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Processing Time ◽  
Reaction Medium ◽  
Aqueous Dispersion ◽  
Organic Cations ◽  
Optimal Conditions ◽  
Exchange Adsorption

Technology of obtaining montmorillonite modified by polyionenes is developed. Macromolecular polymer intercalation of a quaternary ammonium salt of montmorillonite intercrystalline space is shown to be accompanied with increased interlayer distances from 1.08 nm to 1.67 nm. The technique of synthesis of montmorillonite modified by polyionenes is suggested. Optimal conditions for sorption of polyionenes molecules with montmorillonite are found to be: the concentration of aqueous dispersion of montmorillonite is 1 %, the temperature of the reaction medium is 40 °C, the montmorillonite-polyionene ratio is 3 : 1, the processing time is 24 hours. The mechanism of montmorillonite modification is suggested to involve the next steps: connection of organic cations to montmorillonite surface determined by attachment of organic cations to exchange position during ion-exchange adsorption and adsorption of organic cations with acid sylanol groups, i.e. torn bonds on crystal faces. These processes are shown to result in more perfect structure by organic cations adsorption with acid sylanol groups (torn bonds on crystal faces).

scholarly journals The challengein mineral processing for low-grade ores and man-made waste: how toreducethe negative environmental impact from the mining industry?.

2020 ◽  
Vol 12 (3-2020) ◽  
pp. 21-34
Author(s):  
Anton V. Svetlov ◽  
◽  
Evgeniya A. Krasavtseva ◽  
Andrey A. Goryachev ◽  
Evgeny O. Potorochin ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Environmental Impact ◽  
Mining Industry ◽  
Low Grade ◽  
Tailing Dump ◽  
Current State ◽  
Ferrous Metals ◽  
Sulfide Ore ◽  
Non Ferrous Metals ◽  
Negative Environmental Impact

The paper presents a brief overview of the current state of involvement in processing of low-gradede-posits of sulfide copper-nickel oresandmining waste of non-ferrous metallurgy. Examples of foreign and Russian experience are given. A possible method for geotechnological processing of substandard sulfide ore material containing non-ferrous metals and iron is presented on the examples of objects in the Mur-mansk region. The problem of fixing dusty surfaces of the tailing dump is considered. An assessment of the possibilities of chemical coagulation for wastewater treatment is given.

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