Radiological impact of the operation of two Steam Power Plants on the activity levels of 232Th, 226Ra and 40K in the sediments at Semarang and Cirebon, Indonesia DOI Creative Commons

Muslim Muslim-Muslim,

Sri Wulandari, Lilik Maslukah

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Июнь 4, 2024

Abstract The radiological concentration and distribution of natural radionuclides 232Th, 226Ra, 40K in the surface sediments two steam power plants (SPP) vicinity were investigated. Sediment samples analyzed for radionuclides, organic matter, grain size composition. average activity 226Ra Semarang are 71.485 Bq·kg−1; 29.645 Bq·kg−1 570.459 Cirebon 90.593 41.709 725.788 Bq·kg−1, respectively. According to Indonesian standards concentrations still below recommended values. radionuclide levels influenced more by proximity coal resources, than other factors such as content,sediment texture, hydrodynamic processes. These data can be considered baseline this region used reference or information. Thus, obtained study did not show any significant health risk ecosystem nearby areas SPP. Radiological parameters absorbed dose rate (Din), utilization index (AUI), annual effective equivalent (AEDEin), gonadal (AGDE), radium (Raeq), hazard indices (Hex, Hin) showed some excess values when compared standards.However, they comparable from parts world.

Язык: Английский

Study on Synergistic Desulfurization and Chlorine Resistance of Alkaline Metal Oxides@ZrO2/γ‐Al2O3‐Loaded Catalysts DOI Open Access
Lei Zhang,

Yidan Mu,

Ya Chen

и другие.

Advanced Engineering Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

In this article, the atmospheric pollutants carbonyl sulfide (COS) and HCl in blast furnace gas are taken as research object. Catalysts with γ‐Al 2 O 3 carrier alkaline metal oxides active components prepared for synergistic desulfurization chlorine resistance of gas. The results show that CaO–ZrO /γ‐Al hydrolysis catalyst has best performance. removal rate COS is maintained at more than 95 wt%, maximum can reach 99 overflow H S also 80%. At same time, treatment efficiency about 90%. This work provides an effective reference acidic harmful actual industrial

Язык: Английский

Процитировано

4

Research progress on multi-source coal-based solid waste (MCSW) resource utilization and backfill mining basic theory: A systematic literature review DOI

Xiang Yu,

Ke Yang, Xiang He

и другие.

Process Safety and Environmental Protection, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

3

Carbonation curing of magnesium-coal slag solid waste backfill material: Study on properties of flow, mechanics and carbon sequestration DOI Creative Commons
Zhiyu Fang,

Yuheng Gao,

Wei He

и другие.

Case Studies in Construction Materials, Год журнала: 2024, Номер 20, С. e03204 - e03204

Опубликована: Апрель 24, 2024

To expedite the achievement of ''30-60 double carbon'' goal, it is imperative to create a novel, low-carbon, cost-effective, and sustainable backfill material for mining purposes. Against this background, paper investigates workability, carbonation performance carbon sequestration capacity coal gangue (CG), magnesium slag (MS) fly ash (FA) as solid waste material. The results study show that: (1) rheological properties CFM fresh slurry conform Herschel-Balkley (H-B) model, its flowability meets requirements mine transport. With increasing MS content, yield stress, apparent viscosity, thixotropy shear thickening increase, micro-slump diffusion diameter decrease. (2) Carbonation curing can effectively improve early UCS CFM. highest was 8.854 MPa after 7 days curing, which 27.84 times higher than that standard curing. In addition, increased with increase age content. (3) produces large number products such calcium carbonate makes microstructure denser. (4) absorb up 14.55% CO2 carbonation. (5) volume stability significantly improved summary, not only new type low-cost, low-carbon material, but practical application in field backfilling also has great potential realisation resource utilisation sequestration.

Язык: Английский

Процитировано

15

Mining Pressure Distribution Law and Disaster Prevention of Isolated Island Working Face Under the Condition of Hard “Umbrella Arch” DOI
Chong Jia, Xingping Lai, Feng Cui

и другие.

Rock Mechanics and Rock Engineering, Год журнала: 2024, Номер 57(10), С. 8323 - 8341

Опубликована: Май 22, 2024

Язык: Английский

Процитировано

15

The influence of coal gangue dosage and concentration on the properties and hydration mechanism of fly ash-based cemented filling materials DOI
Xiang Zhang,

S. Zhu,

Tao Yang

и другие.

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 144903 - 144903

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

2

Microbial-Modified Coal-Based Solid Waste Backfill Material: Mechanical Improvement and Its Effect on the Water Environment DOI

Shijie Guo,

Meng Li, Alessandro Pasquale Fantilli

и другие.

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 144735 - 144735

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

1

Effect of 3D-printed polymer with negative Poisson's ratio structure on the mechanical characteristics of cemented tailings backfill DOI Creative Commons
Jiangyu Wu, Shihao Li,

Louyan Shen

и другие.

Case Studies in Construction Materials, Год журнала: 2025, Номер unknown, С. e04665 - e04665

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

1

Study on the evolution mechanism of gangue filling and overlying rock spatial structure in steeply dipping stope DOI
Baofa Huang, Panshi Xie,

Weidian Lin

и другие.

Engineering Failure Analysis, Год журнала: 2024, Номер unknown, С. 108884 - 108884

Опубликована: Сен. 1, 2024

Язык: Английский

Процитировано

6

Investigating the Mechanism of Land Subsidence Due to Water Network Integration at the Guangzhou Longgui Salt Mine and Its Impact on Adjacent Subway DOI Open Access
Nan Zhang,

Xuchao Liu,

Yun Zhang

и другие.

Water, Год журнала: 2024, Номер 16(12), С. 1723 - 1723

Опубликована: Июнь 17, 2024

Water-soluble mining was invariably associated with surface subsidence, which in some cases escalated to the movement, deformation, and even collapse of overlying rock layers, triggering grave subsidence calamities. The caprock salt-bearing strata Longgui salt area closely adjacent third aquifer, mainly consisted fractured, porous, high-permeability materials such as mudstone conglomerates, rendering geological conditions highly complex. Years water-soluble had led significant area, a trend toward accelerated subsidence. In this study, were analyzed, through simulated experiments pillar dissolution mining, mechanisms examined. Over time, gradually perforated pillars caprock, ceasing support ultimately transforming small cavities into large single cavity. Utilizing data, research employed numerical simulation inverse predict patterns from 2019 2025, revealing that maximum reached 1367.6 mm I 1879.5 II, rates 12.05 mm/y 44.78 mm/y, respectively. Moreover, impact ground on construction subways assessed by establishing monitoring points evaluating along subway cross-sections longitudinal directions. findings provided valuable insights for guiding prevention control calamities mine similar areas Guangzhou, China.

Язык: Английский

Процитировано

5

Differential roof cutting for roadway support in dual gob-side entry retention on a single working face − Multilevel continuous anchor-grouting control technology: A case study DOI

Chuang Cao,

Zhengzheng Xie, Nong Zhang

и другие.

Engineering Failure Analysis, Год журнала: 2024, Номер 163, С. 108475 - 108475

Опубликована: Май 18, 2024

Язык: Английский

Процитировано

4