scholarly journals Physicochemical and Sorptive Properties of a Phosphorylated Mercerized Cotton Fabric

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3756
Author(s):  
Roman Solovov ◽  
Anfisa Perevoznikova ◽  
Alexandr Seliverstvov ◽  
Alexey Shapagin ◽  
Alexandr Fedoseev ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Phosphorus Content ◽  
High Efficiency ◽  
Positive Impact ◽  
Sorption Process ◽  
Exchange Capacity ◽  
Spectrophotometric Analysis ◽  
Static Exchange Capacity ◽  
Phosphorus Containing ◽  
Sorption From Aqueous Solutions

A process of phosphorylation for a mercerized cotton kersey fabric was investigated. After wet oxidation, the phosphorus content in each sample was determined by spectrophotometric analysis. The range was 0.179 to 0.950 mmol g–1. A significant decrease in the tensile strength of samples resulted from an increase of phosphoric acid concentration in the phosphorylating solution. The mercerization has a positive impact on the process of phosphorylation, as the phosphorus content was found to be three times higher in the samples that underwent mercerization. The sorption properties of phosphorylated cotton fabric were studied using the Cu2+ sorption process as a reference. The value of the static exchange capacity for the phosphorylated fabric was determined to reach its maximum when the concentration of the H3PO4 in the phosphorylating solution was 1.40 M, and was found to be 1.48 ± 0.11 mmol g–1 with the phosphorus content equal to 0.898 ± 0.090 mmol g–1. The sorption of Cu2+ by a single phosphorus-containing group occurred for samples with phosphorus content not exceeding 0.80 mmol g–1. The preliminary studies of micro-quantities of 241Am, 233U, and 239Pu radionuclide sorption from aqueous solutions with phosphorylated textile demonstrated the high efficiency.

scholarly journals Sorption And Physicochemical Properties of A Phosphorylated Mercerised Cotton Cellulose

2021 ◽  
Author(s):  
Roman Solovov ◽  
Anfisa Yu. Perevoznikova ◽  
Alexander F. Seliverstvov ◽  
Alexey V. Shapagin ◽  
Alexander M. Fedoseev ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Phosphorus Content ◽  
High Efficiency ◽  
Exchange Capacity ◽  
Spectrophotometric Analysis ◽  
Cotton Cellulose ◽  
Static Exchange Capacity ◽  
Cellulose Sample ◽  
Phosphorus Containing ◽  
Phosphoric Acid Concentration

Abstract A process of a mercerised cotton cellulose sample phosphorylation has been investigated. After oxidation a phosphorus content was determined by spectrophotometric analysis and it was in a range of 0.179 to 0.950 mmol g–1. A significant decrease in the tensile strength of the sample was found upon an increase of phosphoric acid concentration in a phosphorylating solution. Phosphorylated mercerized fabric contents more phosphorous as unmercerized fabric in 3 times. The sorption properties of phosphorylated cotton cellulose in aqueous solution containing Cu2+ were characterized. The maximum of static exchange capacity was found to be 1.48 ± 0.11 mmol g–1 for phosphorylated cotton with content 0.898 ± 0.090 mmol g–1 of phosphorus. The sorption of Cu2+ by single phosphorus-containing group occurs for samples with not exceeding 0.80 mmol g–1 of phosphorus. The preliminary studies of uranium(VI) micro quantities of radionuclides 241Am, 233U and 239Pu sorption from aqueous solution with phosphorylated textile demonstrated the high efficiency.

Study of Sorption of Manganese (II) Cations by Composite Sorbent

2020 ◽  
Vol 989 ◽  
pp. 85-90
Author(s):  
Irina Lebedeva ◽  
Tatiana M. Lonzinger ◽  
Vadim A. Skotnikov
Keyword(s):  
Sorption Isotherms ◽  
Sorption Process ◽  
Exchange Capacity ◽  
Static Exchange Capacity ◽  
Composite Sorbent ◽  
Sorption Material ◽  
Quality Of Water ◽  
Heavy Metal Salts ◽  
Static Conditions ◽  
Manganese Compounds

A significant increase in the amount of pollution (including heavy metals) that enter the hydrosphere as a result of human activity, sanitary requirements that are imposed on the quality of water, lead to the search for effective ways and methods of its purification. Wastewater from many industrial plants contain heavy metal salts, including manganese compounds. The sorption of manganese (II) cations by a composite sorbent from model solutions under static conditions was studied, to determine the possibility of using this sorption material in wastewater treatment. The characteristics of the sorption capacity of the composite sorbent are determined. It was established that the static exchange capacity of the composite sorbent is 0.9 mg/g; distribution coefficient - 47.34 l/g; the degree of purification of the solution is 99.9%. The empirical sorption equations for the manganese (II) cation are found, the sorption isotherms are constructed. It is established that the sorption process is described by the Freundlich equation. Experiments have shown that the composite sorbent is effective in extracting manganese (II) from aqueous solutions. Experimental data suggest that the sorbent studied can be used to clean industrial wastewater from manganese compounds.

Investigation of Hybrid Fuel Cell (HFC) Technology Applications on the Future Passenger Railroad Transportation

Joint Rail ◽  
2003 ◽  
Author(s):  
H. Moghbelli ◽  
Y. Gao ◽  
R. Langari ◽  
M. Ehsani
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
High Speed ◽  
High Efficiency ◽  
New Technologies ◽  
Positive Impact ◽  
Weak Link ◽  
Transportation System ◽  
Production Costs ◽  
Passenger Railroad

Due to the consideration of fragile security, and longer check-in times and inconveniences due to increased air travel security examination since September 11th 2001, more and more people have turn to ground transportation. Unfortunately, the inefficient, environment-unfriendly and unsafe passenger cars and buses are the only choices available for middle distance trips. Development of high efficiency, clean and high speed railroad passenger transportation system has become more necessary to overcome this weak link. In this paper, the applicability of hybrid drive train technologies for middle-distance passenger train locomotives will be investigated. A systematic design of the diesel based hybrid locomotive helps to increase efficiency, improve fuel economy, reduce emissions and also reduce mass production costs. Furthermore, professional management and maintenance of railroad train locomotives make such new technologies more practical than for road vehicles. The success of such transportation system will have a great positive impact on our social activities, quality of life, energy supply, environment and economy. A diesel based hybrid electric locomotive (HEL) with batteries or an ultracapacitor is an option to reduce fuel consumption and emissions and provide better performance and fuel economy. The reduced fuel consumption helps reduce the amount of pollutants released. Engineering estimation indicate that emissions will be reduced by 70% and fuel efficiency will be increased by at least 30% in hybrid locomotives.

scholarly journals Sustainable Use of Biochar in Environmental Management

2021 ◽  
Author(s):  
Ammal Abukari ◽  
Ziblim Abukari Imoro ◽  
Abubakari Zarouk Imoro ◽  
Abudu Ballu Duwiejuah
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Sustainable Use ◽  
Environmental Pollutants ◽  
Growth Yield ◽  
Soil Nutrient ◽  
Environmental Pollutant ◽  
Exchange Capacity ◽  
Agricultural Wastes ◽  
Preparation Conditions

Conversion of agricultural wastes into eco-friendly and low cost biochar is not only a smart recycling strategy but a panacea to environmental pollution management. Agricultural wastes biochar can be an effective alternative technique for controlling contaminants due to its low cost, high-efficiency, simple to use, ecological sustainability and reliability in terms of public safety. Biochars have made substantial breakthroughs in reducing greenhouse gases emissions, reducing soil nutrient leaching, sequester atmospheric carbon into the soil, increasing agricultural productivity, and reducing bioavailability of environmental contaminants. Recent advances in the understanding of biochars warrant a proper scientific evaluation of the relationship between its properties and impact on soil properties, environmental pollutant remediation, plant growth, yield, and resistance to biotic and abiotic stresses. The main factors controlling biochar properties include the nature of feedstock, heat transfer rate, residence time and pyrolysis temperature. Biochar efficacy in pollutants management largely depends on its elemental composition, ion-exchange capacity, pore size distribution and surface area, which vary with the nature of feedstock, preparation conditions and procedures. The chapter explored the possibility of using biochar from agricultural wastes as a suitable alternative for the remediation of environmental pollutants, soil conditioning and the long-term biochar application in the environment.

scholarly journals The development of technology for production of zeolites from fly-ash from Troitskaya power plant

2021 ◽  
Vol 8 (1) ◽  
pp. 20218111
Author(s):  
V. A. Snegirev ◽  
V. M. Yurk
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Pore Diameter ◽  
Silicon Oxide ◽  
Exchange Capacity ◽  
Static Exchange Capacity ◽  
Average Pore ◽  
Hydrochemical Synthesis ◽  
Bet Method ◽  
Zeolite Production

The study examines the technology of processing fly ash from Troitskaya power plant for the production of zeolite. The paper presents the results of laboratory studies evaluating the suitability of fly ash from Troitskaya power plant for the production of zeolites and the development of the zeolite production process. Fly ash contains a small amount of heavy metals that can complicate processing, but contains a large amount of silicon oxide. The technology consists of high-temperature alkaline activation of fly ash and hydrochemical synthesis. The resulting powder has a specific surface area of 89.7 m2/g, determined by the BET method, and an average pore diameter of 0.345 μm. The static exchange capacity was 220 mg/g.

scholarly journals Changes in some chemical properties of saline-sodic soils over time as affected by organic residues: An incubation study

2020 ◽  
Vol 53 (1) ◽  
pp. 1
Author(s):  
Mohsen Jalali ◽  
Maryam Saeedi Lotf ◽  
Faranak Ranjbar
Keyword(s):  
Crop Production ◽  
Positive Impact ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Limiting Factors ◽  
Plant Residues ◽  
Organic Residues ◽  
Sodic Soils ◽  
Treated Soil ◽  
Incubation Study

<p>Salinization and sodification of agricultural lands in arid and semi-arid regions of the world are two limiting factors in the crop production. This study was conducted to evaluate the effect of readily available agricultural residues on changing some chemical properties of saline-sodic soils. Wheat, potato, sunflower, and canola residues were separately added into three saline-sodic soils at a rate of 2% by weight and thoroughly mixed with soils. Control and treated soils were incubated for 168 days at a constant moisture and temperature. The pH, electrical conductivity (EC), soluble cations, available nitrate (NO3-) and phosphorous (P), cation exchange capacity (CEC), and exchangeable sodium percentage (ESP) were measured during the incubation. The EC increased in the response to the incorporation of plant residues, whereas the pH was reduced. The application of organic components in soils increased CEC and decreased ESP. The results showed that the maximum reduction in ESP was observed in the potato treatment because of the highest Ca2+ concentration. The average reduction in ESP of treated soil samples at the end of incubation followed this order: 16.1% (potato residue-treated soil) &gt;12.7% (canola residue-treated soil) &gt;11.1% (wheat residue-treated soil) &gt;9.6% (sunflwer residue-treated soil). The potato residue was the most effective amendment in changing the chemical properties of saline-sodic soils in comparison with other organic residues. The results indicated that the application of organic residues had a positive impact on reducing the soil sodicity and improving the soil fertility depending on their chemical composition.</p>

scholarly journals The Impact and Empirical Analysis of the Development Level of E-commerce Industry on China’s Export Trade

2021 ◽  
Vol 235 ◽  
pp. 02046
Author(s):  
Chun Feng ◽  
Fei Lei ◽  
Zhijun Luo
Keyword(s):  
High Efficiency ◽  
Positive Impact ◽  
Low Cost ◽  
Status Quo ◽  
Export Trade ◽  
Empirical Methods ◽  
Existing Problems ◽  
Development Level ◽  
The Status ◽  
The Impact

With its advantages of low cost and high efficiency, e-commerce is not only favored by ordinary consumers, but also effectively promotes SMEs to find business opportunities and win the market. This article starts with the development scale of China’s e-commerce industry and the status quo of export trade, and measures the overall index of China’s e-commerce industry development level from 2008 to 2018 through empirical methods to analyze its impact on China’s export trade. The results show that the development level of the e-commerce industry has a significant positive impact on China’s export trade. Finally, it analyzes the existing problems in the development of China’s e-commerce industry.

Layer-by-layer Assembly Polyethylenimine/phytic Acid Coating With Gradient Structure for High-Efficiency and Durable Flame Retardant Cotton Fabric With Good Physical and Mechanical Properties

2021 ◽  
Author(s):  
Xinhua Liu ◽  
Hailong Liu ◽  
Yinchun Fang
Keyword(s):  
Physical Properties ◽  
Flame Retardant ◽  
Cotton Fabric ◽  
High Efficiency ◽  
Cotton Fabrics ◽  
Gradient Structure ◽  
Layer By Layer ◽  
Assembly Method ◽  
Lbl Assembly ◽  
Coated Cotton

Abstract In this study, intumescent flame retardant coating of polyethylenimine/phytic acid (PEI/PA) with gradient structure was constructed on cotton fabric through facile layer-by-layer (LBL) assembly method. The LOI value of coated cotton fabric reached over 40% indicating excellent flame retardancy. Reasonable controlling the LBL assembly process of PEI/PA coating brought less influence to the physical properties of cotton fabrics. And the coated cotton fabric revealed good flame retardant washing durability. Thermogravimetric analysis results of coated cotton fabrics showed that PEI/PA flame retardant coating changed the thermal decomposition process and promoted char formation revealing the obviously condensed phase flame retardant action. SEM images of char residues revealed that PEI/PA flame retardant coating promoted to form the intumescent flame retardant (IFR) char layer showing obvious IFR action. This research provides novel strategy for the development of high-efficiency flame retardant cotton fabric with good durability and physical properties using simple LBL assembly method.

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