scholarly journals Capture of toxic gases in MOFs: SO2, H2S, NH3 and NOx

2021 ◽  
Author(s):  
Ilich A. Ibarra ◽  
Vojtech Jancik ◽  
Eva Martínez-Ahumada ◽  
Mariana L. Díaz-Ramírez ◽  
Miriam de Jesus Velasquez-Hernandez
Keyword(s):  
Chemical Composition ◽  
Adsorption Properties ◽  
Toxic Gases

MOFs are promising candidates for the capture of toxic gases since their adsorption properties can be tuned as a function of the topology and chemical composition of the pores. Although...

scholarly journals Adsorption behaviour of hydrogarnet for humic acid

2018 ◽  
Vol 5 (4) ◽  
pp. 172023 ◽  
Author(s):  
Hirotaka Maeda ◽  
Yuichi Kurosaki ◽  
Masanobu Nakayama ◽  
Emile Hideki Ishida ◽  
Toshihiro Kasuga
Keyword(s):  
Humic Acid ◽  
Chemical Composition ◽  
Binding Energy ◽  
Adsorption Properties ◽  
Binding Energies ◽  
Chemical Compositions ◽  
Hydroxyl Groups ◽  
Adsorption Behaviour ◽  
Aqueous Environments ◽  
Single Chemical

Discharge of humic acid (HA) in aqueous environments is a key health and aesthetic issue. The present work investigates the use of hydrogarnet as a novel adsorbent for HA. Hydrogarnet was hydrothermally synthesized with different solvents to control the chemical composition. Hydrogarnet with three types of chemical compositions had better adsorption properties for HA than hydrogarnet with a single chemical composition. Controlling the chemical composition of hydrogarnet increased the number of hydroxyl groups and the overall binding energy of the system, leading to changes in the zeta potential. The enhancement of these adsorption properties is related to the increased numbers of hydroxyl groups on the surface and their diverse binding energies.

Preparation of Activated Shungite and Characterization of Its Chemical Composition and Adsorption Properties

2019 ◽  
Vol 53 (4) ◽  
pp. 241-247
Author(s):  
M. K. Kazankapova ◽  
M. K. Nauryzbaev ◽  
S. A. Efremov ◽  
B. T. Ermagambet ◽  
N. U. Nurgaliyev ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Adsorption Properties

Reoxidation of graphene oxide: impact on the structure, chemical composition, morphology and dye adsorption properties

2021 ◽  
pp. 150774
Author(s):  
Cecilia A. Zito ◽  
Tarcísio M. Perfecto ◽  
Talita Mazon ◽  
Ann-Christin Dippel ◽  
Dorota Koziej ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Chemical Composition ◽  
Dye Adsorption ◽  
Adsorption Properties

Chemical composition of beef when feeding bull calves with non-conventional feed additives in Yakutia

2021 ◽  
pp. 44-47
Author(s):  
М.Ф. Григорьев ◽  
А.И. Григорьева ◽  
А.А. Сидоров ◽  
А.В. Попова ◽  
К.П. Макаров
Keyword(s):  
Chemical Composition ◽  
Raw Materials ◽  
Vitamin B1 ◽  
Adsorption Properties ◽  
Feed Additives ◽  
High Efficacy ◽  
Vitamin B3 ◽  
Bull Calves ◽  
The Republic ◽  
Standard Techniques

Исследования по изучению влияния нетрадиционных кормовых добавок на химический состав мяса бычков симментальской породы были проведены на базе крестьянского хозяйства «Лонкур» в Сунтарском районе Республики Саха (Якутия). В статье представлена оценка эффективности кормовых добавок, приготовленных из местного природного сырья (50 и 100 г хвойной муки, 0,7 г/кг живой массы цеолита хонгурина и 35 г кемпендяйской соли). При анализе данных установлено, что опытные группы, получавшие кормовые добавки, имели лучшие показатели по убойному выходу и качеству мяса. Изучение химического состава мяса было проведено в соответствии с общепринятыми методиками. Было показано, что образцы мяса опытных групп превосходили контрольную группу по содержанию белка на 0,64 и 0,24%, жира — на 2,60 (P>0,999) и 1,73% (P>0,99), кальция — на 13,47 и 8,39%, фосфора — на 20,00 и 10,00%, железа — на 5,98 и 3,04%, меди — на 13,33 и 6,67%, магния — на 9,84 и 5,71%, селена — на 12,50 и 10,63%, витамина А — на 10,00 и 5,00%, витамина С — на 50,00 и 25,00%, витамина Е — на 33,33 и 11,11%, витамина В1 — на 6,25 и 3,13%, витамина В2 — на 30,77 и 15,38%, витамина В3 — на 11,43 и 7,14% соответственно. По накоплению цинка, свинца и кадмия в мясе опытных групп наблюдалась противоположная тенденция, связанная с сорбционными свойствами природных цеолитов. Полученные результаты показали перспективность использования нетрадиционных кормовых добавок в кормлении молодняка скота при производстве мяса в условиях Якутии. The investigation took place at the Krestyanskoe Khozyaystvo “Lonkur” (farm) in the Suntarskiy rayon (district) of the Republic of Sakha (Yakutia). The effect of non-conventional feed additives was analyzed on meat chemical composition of Simmental bull calves. The article reports on the effectiveness of feed additives made from the local natural raw materials (50 and 100 g of conifer flour, 0.7 g per 1 kg of body weight of Hongurin’s zeolite and 35 g Kempendyai salt). The groups consumed feed additives showed the best characteristics of slaughter weight and meat quality. Meat chemical composition was tested according to the Standard techniques. The beef obtained from two experimental groups exceeded the control in protein by 0.64 and 0.24%, fat — by 2.60 (P>0.999) and 1.73% (P>0.99), Ca — by 13.47 and 8.39%, P — by 20.00 and 10.00%, Fe — by 5.98 and 3.04%, Cu — by 13.33% and 6.67%, Mg — by 9.84 and 5.71%, Se — by 12.50 and 10.63%, vitamin A — by 10.00 and 5.00%, vitamin C — by 50.00 and 25.00%, vitamin E — by 33.33 and 11.11%, vitamin B1 — by 6.25 and 3.13%, vitamin B2 — by 30.77 and 15.38%, vitamin B3 — by 11.43 and 7.14%, respectively. Since natural zeolites exhibit good adsorption properties the beef accumulated less Zn, Pb and Cd. The results proved high efficacy of the non-conventional feed additives used in this study.

The design of heterojunctions based on boron-/phosphorus-doped graphene and ZnO monolayer to enhance adsorption properties for toxic gases

2022 ◽  
Vol 131 (2) ◽  
pp. 025108
Author(s):  
Jijun Ding ◽  
Yanxin Jin ◽  
Haixia Chen ◽  
Haiwei Fu ◽  
Chao Xu ◽  
...  
Keyword(s):  
Adsorption Properties ◽  
Toxic Gases ◽  
Doped Graphene ◽  
Phosphorus Doped

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina
Keyword(s):  
Chemical Composition ◽  
Spectral Line ◽  
Variable Star ◽  
Radial Velocities ◽  
Crimean Astrophysical Observatory ◽  
Line Intensities ◽  
Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

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