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Wyświetlanie 1-6 z 6
Tytuł:
Solvent extraction of Terbium(III) from chloride solution using organophosphorus extractant, its mixture and ionic liquid in the presence of organic acids
Autorzy:
Tran, Thanh Tuan
Song, Si Jeong
Oh, Chang Geun
Lee, Man Seung
Powiązania:
https://bibliotekanauki.pl/articles/24085863.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
extraction
Terbium(III)
organic acid
ionic liquid
buffer effect
Opis:
Addition of organic acids to dilute hydrochloric acid solution can improve the extraction of rare earth elements by single cationic extractants. However, the correlation between the chemical structure of organic acids and the extraction of REEs as well as the variation in equilibrium pH has not been elucidated. In this study, we investigated the extraction of Tb(III) from dilute HCl solutions containing an organic acid like formic, lactic, fumaric, or maleic acid. As extractants, single Cyanex 272, a mixture of Cyanex 272 and Alamine 336 (Ala336-Cy272), and an ionic liquid (ALi-Cy272) synthesized by Cyanex 272 and Aliquat 336 were used. The speciation of Tb(III) in dilute HCl solutions containing organic acids was analyzed. In extraction of Tb(III), organic acids showed two roles as complexing and buffering agent, which depended on the chemical structure of the acids. There was some difference in the extraction of Tb(III) between single Cyanex 272 and ionic liquid, ALi-Cy272. During extraction with ALi-Cy272, formic and lactic acid negatively affected the extraction of Tb(III). The fact that the chemical structure of organic acids affected the extraction of Tb(III) from dilute HCl solution by the studied extractants can provide important information on the selection of suitable extraction systems.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 162714
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on social security through Buddhism in the Tran dynasty
Badania nad zabezpieczeniem społecznym przez buddyzm w dynastii Tran
Autorzy:
(Rev. Thich Thanh Dien), Duong Quang Dien
Thi Phuong Chi, Nguyen
Van Tuan, Nguyen
Van Kieu (Most Rev. Thich Dao Thinh), Bui
Thi Minh Hong (Bhikkhuni Thich Dieu Tam), Cao
Thi Nga, Nguyen
Powiązania:
https://bibliotekanauki.pl/articles/1790768.pdf
Data publikacji:
2021
Wydawca:
Towarzystwo Wiedzy Powszechnej w Szczecinie
Tematy:
Social security
amnesty
Buddhism
Tran dynasty
amnestia
Buddyzm
dynastia Tran.
zabezpieczenie spoełczne
Opis:
During the period from 8th Century to early decades of the 14th Century, Dai Viet was in the course of prosperous development with reigns of Tran Thai Tong (ruled from 1226-1258), Tran Thanh Tong (1258-1278), Tran Nhan Tong (1278-1293), Tran Anh Tong (1293-1314), Tran Minh Tong (1914-1329), and Trang Hien Ton (1329-1341). We can say that this is time of prosperity and advance of Tran Dynasty. The Tran Kings’ piety upon Buddhism had a great impact on thought and government policies, especially the spirit of equality and humanity. Kings of Tran express a great care on life of the people, try to relieve their toils, reduce their duties, help the poor, and enhance the social security.116 From Tran Du Tong onwards, all was not as before anymore. Research on social security by Buddhism in Tran dynasty can be presented in many aspects, but this article just focuses on clarifying the social security through Buddhism’s care on material and spiritual life of the people.
W okresie od VIII wieku do wczesnych dekad XIV wieku - za czasów panowania: Tran Thai Tong (rządził od 1226-1258), Tran Thanh Tong (1258-1278), Tran Nhan Tong (1278-1293), Tran Anh Tong (1293-1314), Tran Minh Tong (1914-1329), i Trang Hien Ton (1329-1341) - Dai Viet był w na drodze rozwoju. Można powiedzieć, że jest to czas prosperity i postępu dynastii Tran. Pobożność królów Tranu wobec buddyzmu miała wielki wpływ na myślenie i politykę rządu, zwłaszcza na ducha równości i człowieczeństwa. Królowie dynastii Tran wyrażają wielką troskę o życie ludzi, starają się ulżyć im w trudach, zmniejszają ich obowiązki, pomagają biednym i zwiększają bezpieczeństwo społeczne. Od czasów Tran Du Tong, wszystko nie było już takie jak dawniej. Badania nad zabezpieczeniem społecznym przez Buddyzm w dynastii Tran można przedstawić w wielu aspektach, niniejszy artykuł koncentruje się jednak tylko na wyjaśnieniu zabezpieczenia społecznego poprzez opiekę Buddyzmu nad materialnym i duchowym życiem ludzi.
Źródło:
Edukacja Humanistyczna; 2021, 1, 44; 171-193
1507-4943
Pojawia się w:
Edukacja Humanistyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of macro economic factors and financial development on energy projects - case in ASEAN countries
Autorzy:
Hanh, Hoang Thanh
Huy, Dinh Tran Ngoc
Phuong, Nguyen Thi Thanh
Nga, Le Thi Viet
Anh, Pham Tuan
Powiązania:
https://bibliotekanauki.pl/articles/1818318.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
Tematy:
countries ASEAN
commerce
financial development
energy project
macroeconomic
macro politicies
kraje ASEAN
handel
rozwój finansowy
projekty energetyczne
makroekonomia
makropolityka
Opis:
ASEAN (The Association of SouthEast Asian Nations) demand on energy is depending on economic growth of each country, resources, and political and regulations of each country. This study aims to investigate the role of international trade, financial development, foreign direct investment (FDI) on the consumption of renewable energy (RE) in ASEAN countries of the world. The findings explore that positive nexus among the international trade, real output, financial development, foreign direct investment and consumption of RE. Last but not least, this paper will propose several recommendations and policy suggestion for ASEAN countries to manage and encourage better renewable energy projects in the region. One of its original value is that, in the globalization and integration era, environment pollution will affect all ASEAN countries and in the region, so these nations need to link together to implement renewable projects for environment protection and for further generation.
Źródło:
Management; 2020, 24, 2; 146-157
1429-9321
2299-193X
Pojawia się w:
Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stabilization of Deep Roadways in Weak Rocks Using the System of Two-level Rock Bolts
Autorzy:
Tran, Tuan Minh
Do, Ngoc Thai
Dang, Trung Thanh
Nguyen, Duyen Phong
Vo, Trong Hung
Powiązania:
https://bibliotekanauki.pl/articles/2019328.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
deep roadways
large deformation mechanism
control techniques
numerical simulation
weak rocks
rock bolts
odkształcenia
symulacja numeryczna
kotwie górnicze
Opis:
Large rock mass deformation around deep roadways in the weak rocks was a significant problem in mining activities in Vietnam and other countries. The excavation of roadways leads to high releasing stress, which exceeds the peak strength of spalling surrounding rock and causes it to enter the post-failure stage. Tensile failures then initiate and develop around the roadways, which causes the fragmentation, dilation, and separation of surrounding rock. The capacity of the primary support system is low, which results in a severe contraction in the whole section of roadways, which requires finding solutions to prevent the deformation of rock mass around roadways and technical solutions from stabilizing for deep roadways. To stability analysis of roadways can be applied analytical, experimental, semi-experimental, and numerical methods. This paper introduces the prevention mechanism of large deformation of rock mass around roadways using 2-level rock bolts. The research results show that using the system of two-level rock bolts can reduce the values of tensile stress on the boundary of roadways range from 10 to 15% compared with only one. The importance of the total displacement of rock mass on the boundary of roadways will be reduced from 3.47 to 13.85% using six long cable bolts.
Źródło:
Inżynieria Mineralna; 2021, 2; 157--166
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying Artificial Pillar to Replace the Coal Pillar Protecting Roadway to Increase Production Efficiency and Sustainable Development in the Vietnamese Coal Industry
Autorzy:
Dinh, Van Cuong
Nguyen, Anh Tuan
Tran, Van Thanh
Nguyen, Thi Hoai Nga
Duong, Duc Hai
Powiązania:
https://bibliotekanauki.pl/articles/2020898.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
coal pillar protecting roadways
coal loss
artificial pillar
underground mine
filary węglowe
górnictwo podziemne
ubytki węgla
Opis:
Vietnam's domestic coal production is growing fast and is expected to reach 68.9 million tons in 2030, nearly 1.5 times higher than today. Open-pit mines will gradually reduce production and close, and underground mining coal output will increase progressively year by year and take a leading role. Besides the investment in new mines to achieve these goals, it is necessary to maximize the coal reserve exploited annually of existing underground mine projects, which its coal reserve in pillars protecting roadways currently accounts for 12−15%. The further exploitation of this coal reserve will decrease the costs of preparation of underground mines and granting mining rights and depreciation of infrastructure assets. Moreover, it will help reduce the loss of non-renewable resources and contributing to the sustainable development of Vietnam’s coal industry.
Źródło:
Inżynieria Mineralna; 2021, 2; 587--597
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the possibility of using artificial pillar to replace the protection coal pillar of the preparation roadways during the mining process at underground coal mines in Quang Ninh region, Vietnam
Badanie możliwości zastosowania sztucznego filaru do zastąpienia ochronnego filaru węglowego na drogach przygotowawczych podczas procesu wydobycia w podziemnych kopalniach węgla w regionie Quang Ninh w Wietnamie
Autorzy:
Cuong, Dinh Van
Thanh, Tran Van
Tuan, Nguyen Anh
Powiązania:
https://bibliotekanauki.pl/articles/318747.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
podziemne kopalnie węgla
Wietnam
filary
underground coal mines
Vietnam
pillars
Opis:
The coal reserves in protection pillar of roadways are expected to be left in the mining process in underground mines in Quangninh coal basin which is relatively large (about 16% of the total reserves). If it can be exploited, it will help to save non-renewable coal resources, reduce the cost of preparing roadway meters, extend the mine life and increase the efficiency of construction investment. In the world, in order to reduce coal loss in protection pillar of roadways, mining technology to exploit and use artificial protection pillars are quite popular. Accordingly, in order to simultaneously exploit coal in the protection pillar and maintain the transport roadway as a ventilation roadway for the longwall in below level, the post-mining coal pillar will be replaced by artificial pillars formed from the stone backfill cribs, columns, metal cribs, chemical materials or low-grade concrete mortar mixes formed from fly ash, bottom ash of thermal power plants, combined crushed waste rock and a cement additive,... This paper will evaluate the possibility and propose a number of mining technological scheme as well as the type of construction materials suitable for artificial columns.
Źródło:
Inżynieria Mineralna; 2019, 21, 2/2; 192-198
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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