scholarly journals Impact of biofuel in agglomeration process on production of pollutants

2017 ◽  
Vol 49 (2) ◽  
pp. 159-166 ◽  
Author(s):  
Jaroslav Lesko ◽  
Jozef Hudak ◽  
Zuzana Semanova
Keyword(s):  
Chemical Properties ◽  
Coke Breeze ◽  
Physical And Chemical Properties ◽  
Technological Parameters ◽  
Gas Emissions ◽  
Agglomeration Process ◽  
Environment Effects ◽  
Metallurgical Company ◽  
Physical And Chemical ◽  
And Chemical Properties

Production of agglomerate in the metallurgical company belongs among the largest sources of emissions damaging the environment. Effects of coke breeze substitution by charcoal, pine, and oak sawdust there were sintering performed in a laboratory agglomeration pan with substitution ratios of 14 % and 20 % by the emissions of CO2, CO, NOx and NO. Variations in the gas emissions might have been affected by physical and chemical properties of the input materials and the technological parameters of agglomeration. It is important and necessary to seek other methods and materials with which it would be possible to optimize the production of emissions and protect the environment.

scholarly journals Technological Parameters of the Process of Producing Metallized Iron Concentrates from Poor Raw Material

2019 ◽  
Vol 8 (11) ◽  
pp. 600-603 ◽  
Keyword(s):  
Chemical Properties ◽  
Raw Material ◽  
Physical And Chemical Properties ◽  
Technological Parameters ◽  
Metallurgical Processing ◽  
Physical And Chemical ◽  
And Chemical Properties

In article the possibility of receiving the metallized concentrates from ferriferous ores with the low content of iron, for the purpose of preparation them to metallurgical processing is considered. It is shown that the following factors have significant effect on effectiveness of process of receiving the metallized concentrates: composition of ore, physical and chemical properties of ore, possibility of receiving pellets, type and consumption of reducer, etc.

RESEARCHES IN THE FIELD OF PRODUCING CERAMIC TILES OF LOWER MATERIAL CAPACITY FOR INTERIOR WALL FACING

2013 ◽  
Vol 5 (1) ◽  
pp. 1-10
Author(s):  
Ivan A. Levitskii ◽  
Svetlana E. Baranceva ◽  
Anna I. Pozniak
Keyword(s):  
Mechanical Strength ◽  
Chemical Properties ◽  
Maximum Density ◽  
Physical And Chemical Properties ◽  
Technological Parameters ◽  
Ceramic Tiles ◽  
Interior Wall ◽  
Physical And Chemical ◽  
Lower Material ◽  
And Chemical Properties

The results of researches on the increase of mechanical strength of ceramic tiles for interior wall facing on the stages of pressing and drying with the aim of decreasing their material capacity are given in the article. It is shown that introducing of aluminoborosilikate fiberglass in the raw composition insure increasing of mechanical strength of semifinished tiles on the stages of pressing and drying and optimization of technological parameters of preparation of powder and getting of ceramic tiles cause the maximum density of pressing. It is established that introduction of natural basalt promotes increase of mechanical strength at the bend of tiles after firing that provides possibility of reduction of products thickness at saving of a complexity of demanded physical and chemical properties.

scholarly journals Effects of Rainfall on the Characteristics of Soil Greenhouse Gas Emissions in the Wetland of Qinghai Lake

Atmosphere ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 129
Author(s):  
Ziwei Yang ◽  
Kelong Chen ◽  
Fumei Liu ◽  
Zihan Che
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Chemical Properties ◽  
Co2 Flux ◽  
Growing Season ◽  
Physical And Chemical Properties ◽  
Emission Flux ◽  
Gas Emissions ◽  
Physical And Chemical ◽  
And Chemical Properties

Niaodao, a lakeside wetland, was used as the focus of this study to investigate the effect of rainfall changes on the greenhouse gas fluxes of wetland ecosystems. Wetland plots with different moisture characteristics (+25%, −25%, +75%, and −75% rainfall treatments and the control treatment (CK)) were constructed to observe in situ field greenhouse gas emissions at 11:00 and 15:00 (when the daily mean values were similar) in the growing season from May to August 2020 by static chamber–gas chromatography and to investigate the responses of wetland greenhouse gases to different rainfall treatments. The results showed the following: (1) The carbon dioxide (CO2) flux ranged from −49.409 to 374.548 mg·m−2·h−1. The mean CO2 emission flux was greater at 11:00 than at 15:00, and the +25% and +75% treatments exhibited substantially higher CO2 emissions. In addition, the CO2 flux showed a small peak at the beginning of the growing season when the temperature first started to rise. All treatments showed the effect of the CO2 source, and their effects were significantly different. (2) The methane (CH4) flux ranged from −213.839 to 330.976 µg·m−2·h−1 and exhibited an absorption state at 11:00 and an emission state at 15:00. The CH4 emission flux in August (the peak growing season) differed greatly between treatments and was significantly negatively correlated with the rainfall amount (p < 0.05). (3) The nitrous oxide (N2O) flux ranged from −10.457 to 16.878 µg·m−2·h−1 and exhibited a weak source effect throughout the growing season, but it was not significantly correlated with soil moisture; it was, however, negatively correlated with soil temperature. (4) The different treatments resulted in significant differences in soil physical and chemical properties (electrical conductivity, pH, total soil carbon, and total soil nitrogen). The rainfall enhancement treatments significantly improved soil physical and chemical properties.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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