Sugarcane Biochar for Agricultural Use Produced in Different Conditions of Pyrolysis

2019 ◽  
pp. 1-8
Author(s):  
Juliany Barbosa de Pinho ◽  
Aloisio Bianchini ◽  
Pedro Silvério Xavier Pereira ◽  
Letycia Cunha Nunes ◽  
Rodrigo Fernandes Daros ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Exchange Capacity ◽  
Raw Material ◽  
Physical And Chemical Properties ◽  
Oxidizing Atmosphere ◽  
Different Temperatures ◽  
Agricultural Use ◽  
Physical And Chemical ◽  
And Chemical Properties

From the pyrolysis process, biochar is a carbon rich and recalcitrant organic material with potential for long term carbon sequestration because of its aromatic structure. However, the physical and chemical properties of the biochar vary due to the diversity of raw material and the conditions of production. The present study aimed to evaluate the biochar from the sugarcane bagasse at different temperatures and under two conditions of pyrolysis. The biochar was produced at two final temperatures 200°C (1 hour); 250°C (1h) and 250°C (2h), with pyrolysis of an oxidizing and non-oxidizing atmosphere for both. PH, cation exchange capacity (CTC), carbon content (C), Nitrogen (N), hydrogen (H), H:C, C:N and ash ratios were evaluated. The contents of C, H, N and the atomic ratios H:C and C:N were higher in Biochar produced in a non-oxidizing atmosphere (BNO). However, the content of ash, pH and CTC were higher in Biochar produced in oxidizing atmospheres (BO). One can conclude the direct influence of the pyrolysis condition.

Investigations on condensation phenomena in mercury vapour

1934 ◽  
Vol 30 (2) ◽  
pp. 216-224
Author(s):  
P. C. Ho
Keyword(s):  
Surface Tension ◽  
Chemical Properties ◽  
Mercury Vapour ◽  
Physical And Chemical Properties ◽  
Critical Supersaturation ◽  
Different Temperatures ◽  
Image Position ◽  
Physical And Chemical ◽  
Theoretical Considerations ◽  
And Chemical Properties

Owing to its physical and chemical properties being greatly different from those of any of the liquids which have hitherto been used in the Wilson cloud chamber, mercury has been used in the experiments described in this paper and the condensation phenomena of its vapour at different temperatures observed. Before constructing the apparatus it was considered necessary to get from theoretical considerations some idea about the magnitude of the critical supersaturation for mercury vapour in equilibrium with a drop carrying unit charge. Assuming that J. J. Thomson's formula.where s is the supersaturation of mercury vapour in equilibrium with a drop of mercury of radius a, charge e, density σ and surface tension T, the value of which is assumed here to be independent of the radius of the drop, K the specific inductive capacity of the dielectric surrounding the drop, and R the gas constant for one gramme of weight, all at temperature θ, can be applied to the present problem, this critical supersaturation sm is given by the formula

scholarly journals Tillage and no-tillage effects on physical and chemical properties of an Argiaquoll soil under long-term crop rotation in Buenos Aires, Argentina

2020 ◽  
Vol 8 (2) ◽  
pp. 185-194 ◽  
Author(s):  
Ana Clara Sokolowski ◽  
Barbara Prack McCormick ◽  
Javier De Grazia ◽  
José E. Wolski ◽  
Hernán A. Rodríguez ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Buenos Aires ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
No Tillage ◽  
Physical And Chemical ◽  
And Chemical Properties

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.

scholarly journals THE EFFECT OF LONG-TERM INTAKE OF ATORVASTATIN AND 1-CHOLECALCIFEROL ON THE PHYSICAL AND CHEMICAL PROPERTIES OF LIPOPROTEIN BLOOD COMPLEXES OF LABORATORY RATS

2017 ◽  
pp. 49-52
Author(s):  
S. S. Osuchuk ◽  
O. S. Yakovleva
Keyword(s):  
Chemical Properties ◽  
Intragastric Administration ◽  
Physical And Chemical Properties ◽  
Laboratory Rats ◽  
Combined Application ◽  
Term Administration ◽  
Physical And Chemical ◽  
Positive Effect ◽  
And Chemical Properties

Object: to study the physical and chemical properties of the lipoprotein complexes of rats` blood in the long-term administration of statins and vitamin D. Material and methods. The experiment was performed on 4 experimental groups of rats for 90 days: 1 - intact; 2 - placebo; 3 - intragastric administration of atorvastatin; 4 - intragastric administration of atorvastatin with α-calcidol. The lipoprotein blood complexes were isolated by the method of differential ultracentrifugation. The microflow and microviscosity of the lipoprotein complexes were determined using pyrene. Results. The placebo group revealed an increase of the micropolarity of the total lipid pool of VLDL and a decrease of the microviscosity of the annulary pool of LDL and HDL. The administration of atorvastatin reduces the microviscosity of HDL. The combined application of atorvastatin and α-calcidol reduces the microviscosity of HDL. Conclusion. We have drawn a conclusion about the complex effect of stress, atorvastatin, and α-calcidol on the physical and chemical properties of the lipoprotein blood complexes and a conclusion about the positive effect of atorvastatin and α-calcidol on the microviscosity of HDL.

scholarly journals Effect of Li, Na and K Modification of Alumina on its Physical and Chemical Properties and Water Adsorption Ability

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4212 ◽  
Author(s):  
Sergey Reshetnikov ◽  
Irina Kurzina ◽  
Alesia Livanova ◽  
Eugene Meshcheryakov ◽  
Lyubov Isupova
Keyword(s):  
Low Temperature ◽  
Water Adsorption ◽  
Chemical Properties ◽  
Raw Material ◽  
Physical And Chemical Properties ◽  
High Adsorption ◽  
Initial Sample ◽  
Adsorption Ability ◽  
Physical And Chemical ◽  
And Chemical Properties

The effect of alkali metal (Li, Na, K) incorporation on the morphology and water vapor uptake properties of mesoporous Al2O3 has been studied. The modification of the raw material, pseudoboehmite, represented a mixture of low-temperature phases (γ + η + χ)-Al2O3, and has been done at low-temperature that does not change the phase ratio. A decrease in specific surface values and an average pores size increase were observed as a result of the introduction of metal cations by impregnation and subsequent thermal treatment. The influence of the content of the modifying metal on the adsorption ability of the obtained samples in relation to water vapours has been studied. It has been established that alkaline modification Al2O3 with the lithium cations did not result in adsorption ability improvement, whereas samples that were modified with sodium or potassium in the amount of 1.2 weight % and 2.6 weight %, respectively, possess a higher equilibrium capacity (by ~40%), as compared to that of the initial sample (Al2O3), and a sufficiently high adsorption rate.

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