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1. Portland Cement Based Immobilization/Destruction of Chemical Weapon Agent Degradation Products

Author:
Walling, Sam A.; Notman, Stuart; Watts, Pat; Govan, Norman; Provis, John L.
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.24 pp. 10383-10393
ISSN:
1520-5045
Subject:
calcium silicate,   etc   ; cement; heat; nerve agents;     Show all 4 Subjects
Abstract:
... The direct immobilization and destruction of two compounds relevant to chemical warfare agents, ethyl methylphosphonic acid (EMPA) and thiodiglycol (TDG), within a freshly mixed Portland cement paste was studied. Cement hydration and phase formation were analyzed to determine the upper limits on the loading of these chemicals achievable in an immobilization setting. EMPA, a degradation product of ...
DOI:
10.1021/acs.iecr.9b01270

2. Correction: Synergy effects of copper and silicon ions on stimulation of vascularization by copper-doped calcium silicate

Author:
Kong, Ni; Lin, Kaili; Li, Haiyan; Chang, Jiang
Source:
Journal of materials chemistry B 2019 v.7 no.20 pp. 3320
ISSN:
2050-7518
Subject:
calcium silicate,   etc   ; chemistry; copper; ions; silicon;     Show all 5 Subjects
Abstract:
... Correction for ‘Synergy effects of copper and silicon ions on stimulation of vascularization by copper-doped calcium silicate’ by Haiyan Li, Jiang Chang et al., J. Mater. Chem. B, 2014, 2, 1100–1110. ...
DOI:
10.1039/c9tb90064k

3. A new model for the degree of entrainment in froth flotation based on mineral particle characteristics

Author:
Yang, Bin; Yin, Wanzhong; Zhu, Zhanglei; Wang, Donghui; Han, Huili; Fu, Yafeng; Sun, Haoran; Chu, Fudong; Yao, Jin
Source:
Powder technology 2019 v.354 pp. 358-368
ISSN:
0032-5910
Subject:
calcium silicate,   etc   ; hematite; image analysis; models; particle size; powders; prediction;     Show all 7 Subjects
Abstract:
... It is well known that the particle shape, in addition to the particle size and density, also significantly affects the entrainment behavior of gangue minerals. There is, however, no model for the degree of entrainment related to the particle shape in a froth flotation. In this study, the mineral particle shapes are quantified using three-dimensional shape factors through a MATLAB-based image analy ...
DOI:
10.1016/j.powtec.2019.06.017

4. GMCs stabilized/solidified Pb/Zn contaminated soil under different curing temperature: Physical and microstructural properties

Author:
Wang, Fei; Shen, Zhengtao; Liu, Rongqin; Zhang, Yunhui; Xu, Jian; Al-Tabbaa, Abir
Source:
Chemosphere 2020 v.239
ISSN:
0045-6535
Subject:
calcium silicate,   etc   ; United States Environmental Protection Agency; X-ray diffraction; adsorption; compression strength; furnaces; gels; hydrotalcite; lead; polluted soils; scanning electron microscopy; slags; soil remediation; solidification; temperature; zinc;     Show all 16 Subjects
Abstract:
... Stabilization/Solidification (S/S) has been widely used in soil remediation to both improve physical properties and immobilize extensive contaminants. GGBS (granulated ground blast furnace slag)-MgO-CaO (GMCs) was used to treat Pb/Zn contaminated soil. The physical and microstructural characteristics of stabilized/solidified contaminated soil were investigated in this study. Microstructural analys ...
DOI:
10.1016/j.chemosphere.2019.124738

5. Phosphate adsorption on an industrial residue and subsequent use as an amendment for phosphorous deficient soils

Author:
López, R.; Antelo, J.; Fiol, S.; Macías-García, F.
Source:
Journal of cleaner production 2019 v.230 pp. 844-853
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; Technosols; adsorption; models; phosphates; phosphorus; sewage treatment; sorbents; sorption isotherms; wastes;     Show all 10 Subjects
Abstract:
... The potential of a calcium silicate hydrate waste product to remove phosphate from sewage treatment plants was tested by using the residue as the sorbent material in an experimental filter bed. Pseudo-second order and intraparticle diffusion models were used to explain the kinetics of phosphate adsorption on the solid material, and the Freundlich equation successfully predicted phosphate adsorptio ...
DOI:
10.1016/j.jclepro.2019.05.092

6. Recovery and purification of metallic silicon from waste silicon slag in electromagnetic induction furnace by slag refining method

Author:
Zhou, Qiang; Wen, Jianhua; Wu, Jijun; Ma, Wenhui; Xu, Min; Wei, Kuixian; Zhang, Zhongyi; Zhang, Li; Xu, Jiaxiong
Source:
Journal of cleaner production 2019 v.229 pp. 1335-1341
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; aluminum; chlorine; furnaces; industry; iron; melting; raw materials; refining; silicon; slags; wastes;     Show all 12 Subjects
Abstract:
... The recovery of silicon from the waste industrial silicon slag is urgent for the cleaner production of silicon industry. The feasibility and optimization of recovering and purifying the metallic silicon from silicon slag are investigated by a united technology of combining electromagnetic separation and slag treatment. The physicochemical purification mechanism of silicon from slag was put forward ...
DOI:
10.1016/j.jclepro.2019.05.071

7. Use of modified bauxite residue-based porous inorganic polymer monoliths as adsorbents of methylene blue

Author:
Hertel, Tobias; Novais, Rui M.; Murillo Alarcón, Roberto; Labrincha, João A.; Pontikes, Yiannis
Source:
Journal of cleaner production 2019 v.227 pp. 877-889
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; adsorbents; adsorption; bauxite; foaming; methylene blue; microstructure; mixing; pH; polymers; porosity; slags; wastewater;     Show all 13 Subjects
Abstract:
... Porous inorganic polymer (IP) monoliths were synthesised using a modified bauxite residue (BR) as the reactive fraction with the objective of using them as adsorbents for methylene blue (MB) from synthetic wastewater. First, unreactive, as-produced BR was transformed into a suitable glassy precursor material for IPs by blending BR with minor quantities of C and CaSiO3, thermally treating it at 120 ...
DOI:
10.1016/j.jclepro.2019.04.084

8. 3D gel printing of porous calcium silicate scaffold for bone tissue engineering

Author:
Zhang, Zhinan; Shao, Huiping; Lin, Tao; Zhang, Yumeng; He, Jianzhuang; Wang, Luhui
Source:
Journal of materials science 2019 v.54 no.14 pp. 10430-10436
ISSN:
0022-2461
Subject:
calcium silicate,   etc   ; bones; compression strength; gels; particle size; porosity; porous media; shrinkage; slurries; tissue engineering;     Show all 10 Subjects
Abstract:
... Potential porous calcium silicate (CaSiO₃) scaffolds for bone tissue engineering were successfully prepared by 3D gel printing technology. The average particle size of CaSiO₃ powder is about 5.119 μm. The CaSiO₃ slurry prepared for printing had been exhibited shear-thinning properties, and the maximum solid loading of the slurry was 72 wt%. The green scaffolds were sintered at 1150 °C for 4 h afte ...
DOI:
10.1007/s10853-019-03626-1

9. Phase Identification of γ- and β-Ca₂SiO₄ via the Rear-Earth Fluorescence Probe

Author:
Lu, Xiaolei; Wang, Shuxian; Liu, Shuxin; Du, Peng; Ye, Zhengmao; Geng, Xuefei; Cheng, Xin
Source:
Journal of physical chemistry 2019 v.123 no.22 pp. 13877-13884
ISSN:
1932-7455
Subject:
calcium silicate,   etc   ; calcium; emissions; europium; fluorescent dyes; ions; magnetism; phase transition; prediction; wavelengths;     Show all 10 Subjects
Abstract:
... Ca₂SiO₄ is a phase-change material, and γ- and β-Ca₂SiO₄ usually coexist in the sintered product. The overlap of the diffraction data between the two polymorphs makes the relevant phase identification difficult. In this work, the Eu³⁺ rear-earth fluorescence probe is introduced in the preparation of Ca₂SiO₄, and the obtained result indicates that the introduction of Eu³⁺ ions facilitates the incre ...
DOI:
10.1021/acs.jpcc.9b02262

10. Naturally Pb-contaminated soils in uranium and thorium anomaly

Author:
da Silva, Cleomacio Miguel; da Silva Filho, Crescêncio Andrade; Souza Neto, João Adauto; Eduardo de Oliveira Costa Júnior, Carlos; Araújo Ribeiro, Fernando Carlos
Source:
TheInternational journal of environmental studies 2019 v.76 no.2 pp. 181-194
ISSN:
1029-0400
Subject:
calcium silicate,   etc   ; atomic absorption spectrometry; dairy farming; granite; lead; polluted soils; thorium; uranium; Brazil;     Show all 9 Subjects
Abstract:
... The paper reports an examination of the primary sources of stable lead (Pb) occurring in rocks and soils on dairy farms in the municipalities of Pedra and Venturosa in Pernambuco, Brazil. Lead in rock and soil was quantified by flame atomic absorption spectrophotometry. The Pb concentration in calcium silicate rock varied from 21 to 1124.00 mg.kg⁻¹ and soil varied from 18 to 96 mg.kg⁻¹. The lead c ...
DOI:
10.1080/00207233.2018.1517970

11. Impact of catalyst load, chemical oxygen demand and nitrite on disinfection and removal of contaminants during catalytic ozonation of wastewater

Author:
Kolosov, Petr; Yargeau, Viviane
Source:
The Science of the total environment 2019 v.651 pp. 2139-2147
ISSN:
0048-9697
Subject:
calcium silicate,   etc   ; atrazine; bacteria; catalysts; chemical oxygen demand; disinfection; effluents; nitrites; nitrogen dioxide; ozonation; ozone; wastewater;     Show all 12 Subjects
Abstract:
... Calcium-silicate mineral Polonite® and aluminum-based catalyst (AL-1010S), previously identified as promising materials for catalytic ozonation, were used as catalysts to investigate the impact of some operating conditions (ratio ozone feed concentration to catalyst load) and wastewater characteristics (chemical oxygen demand - COD and nitrite - NO2 concentration) on the disinfection and removal o ...
DOI:
10.1016/j.scitotenv.2018.09.394

12. Potential use of borosilicate glass to make neutron shielding mortar: Enhancement of thermal neutron shielding and strength development and mitigation of alkali-silica reaction

Author:
Lee, Jun-Cheol; Jang, Bo-Kil; Shon, Chang-Seon; Kim, Ji-Hyun; Chung, Chul-Woo
Source:
Journal of cleaner production 2019 v.210 pp. 638-645
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; absorption; boron compounds; cement; compression strength; concrete; glass; hydrogen; neutrons; recycling; silica;     Show all 11 Subjects
Abstract:
... From a sustainability point of view, the disposal of non-recyclable glasses like Pyrex, tempered glass, and borosilicate glass gradually become an environmental issue because non-recyclable glass is a non-biodegradable material. To obtain high glass recycling ratios without remelting, many researchers have used not only crushed glass as an alternative to both fine and coarse aggregate in concrete, ...
DOI:
10.1016/j.jclepro.2018.11.033

13. Carbon dioxide sequestration and methane production promotion by wollastonite in sludge anaerobic digestion

Author:
Zhang, Yan; Zhang, Lihui; Liu, He; Gong, Linlin; Jiang, Qianqian; Liu, Hongbo; Fu, Bo
Source:
Bioresource technology 2019 v.272 pp. 194-201
ISSN:
0960-8524
Subject:
calcium silicate,   etc   ; calcium; carbon dioxide; carbon sequestration; carbonation; cations; methane; methane production; sludge;     Show all 9 Subjects
Abstract:
... This study investigated the feasibility and performance of simultaneous in-situ CO2 sequestration and CH4 production promotion by wollastonite addition in sludge AD. A maximum CH4 yield increment of 30.8% and maximum methane production rate increment of 64.9% with wollastonite addition at dosage of 16.25 g/L were achieved. CO2 was efficient sequestered by wollastonite addition and resulted in a hi ...
DOI:
10.1016/j.biortech.2018.10.004

14. Fire performance of steel and plasterboard sheathed non-load bearing LSF walls

Author:
Dias, Yomal; Keerthan, Poologanathan; Mahendran, Mahen
Source:
Fire safety journal 2019 v.103 pp. 1-18
ISSN:
0379-7112
Subject:
calcium silicate,   etc   ; buildings; concrete; construction industry; disasters; enthalpy; fire testing; gypsum; magnesium oxide; oriented strandboards; steel;     Show all 11 Subjects
Abstract:
... Light gauge steel-framed (LSF) walls are used as load bearing and non-load bearing building components in traditional concrete framed buildings and emerging all-steel structures. Recent building fire disasters around the world have highlighted the necessity for improved fire performance in such building components. While the fire performance of gypsum plasterboard, magnesium oxide board, calcium s ...
DOI:
10.1016/j.firesaf.2018.11.005

15. The Hydration of β- and α′H-Dicalcium Silicates: An X-ray Spectromicroscopic Study

Author:
Li, Jiaqi; Geng, Guoqing; Zhang, Wenxin; Yu, Young-Sang; Shapiro, David A.; Monteiro, Paulo J. M.
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.2 pp. 2316-2326
ISSN:
2168-0485
Subject:
calcium silicate,   etc   ; X-radiation; calcium; cement; image analysis; microscopy; polymerization;     Show all 7 Subjects
Abstract:
... Dicalcium silicate (C₂S) is an important clinker mineral in Portland and belite-calcium sulfoaluminate cement. However, there is still a lack of information on the local degree of silicate polymerization and calcium coordination in C₂S hydration products. This study aimed to fill this gap by characterizing the hydration of two C₂S polymorphs, the β- and α′H- types, using scanning transmission X-ra ...
DOI:
10.1021/acssuschemeng.8b05060

16. Competitive mechanism and influencing factors for the simultaneous removal of Cr(III) and Zn(II) in acidic aqueous solutions using steel slag: Batch and column experiments

Author:
Chen, Guoliang; Yang, Liyun; Chen, Jun; Miki, Takahiro; Li, Shuwu; Bai, Hao; Nagasaka, Tetsuya
Source:
Journal of cleaner production 2019 v.230 pp. 69-79
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; active sites; adsorption; aqueous solutions; carbonates; chemical composition; chromium; hydrolysis; metal ions; pH; slags; solubility; steel; wastewater; zinc;     Show all 15 Subjects
Abstract:
... Steel slag is a waste produced in the steelmaking process. Because of its physical structure and chemical composition, it can be used as a metal ion removal agent in wastewater. In this study, column and batch experiments were carried out in order to determine the removal efficiency, competitive adsorption mechanism and influencing factors of the Cr3+ and Zn2+ by slag in acidic condition. A single ...
DOI:
10.1016/j.jclepro.2019.04.402

17. Investigation on fusion characteristics of deposition from biomass vibrating grate furnace combustion and its modification

Author:
Li, Fenghai; Li, Yang; Fan, Hongli; Wang, Tao; Guo, Mingxi; Fang, Yitian
Source:
Energy 2019 v.174 pp. 724-734
ISSN:
0360-5442
Subject:
calcium silicate,   etc   ; biomass; calcite; calcium; combustion; cotton; deformation; furnaces; kaolinite; liquids; melting point; potassium; renewable energy sources; temperature; wastes;     Show all 15 Subjects
Abstract:
... To mitigate increasing environmental pressures, biomass is becoming a crucial alternative energy source worldwide. Ash fusion characteristics of biomass has closely related to ash-related problems during its conversion. The fusion characteristics of cotton stalk (CS), the deposition from CS vibrating grate furnace combustion (DCS), and their modification mechanisms were investigated. The results i ...
DOI:
10.1016/j.energy.2019.02.154

18. Correlation between Composition and Mechanical Properties of Calcium Silicate Hydrates Identified by Infrared Spectroscopy and Density Functional Theory

Author:
Izadifar, Mohammadreza; Königer, Franz; Gerdes, Andreas; Wöll, Christof; Thissen, Peter
Source:
Journal of physical chemistry 2019 v.123 no.17 pp. 10868-10873
ISSN:
1932-7455
Subject:
calcium silicate,   etc   ; density functional theory; industry; infrared spectroscopy; infrastructure; mechanical properties; models; physical chemistry; spectral analysis; vibration;     Show all 10 Subjects
Abstract:
... Building and construction industries are at the same time the backbone and the driving force of our modern society. Nearly all our technical infrastructure today is based on cement-based materials. Detailed spectroscopic investigations of model reactions on well-defined mineral substrates under UHV conditions are largely lacking, thus prohibiting a validation of theoretical methods. Even simple ch ...
DOI:
10.1021/acs.jpcc.8b11920

19. The role of secondary minerals in remediation of acid mine drainage by Portland cement

Author:
Sephton, Michael G.; Webb, John A.
Source:
Journal of hazardous materials 2019 v.367 pp. 267-276
ISSN:
0304-3894
Subject:
calcium silicate,   etc   ; acid mine drainage; acidity; cement; cracking; gypsum; hydroxides; iron; neutralization; remediation; sulfuric acid; unsaturated conditions;     Show all 12 Subjects
Abstract:
... To test the effects of secondary mineral formation on cement neutralisation of acid mine drainage (AMD), cement samples were leached with AMD and dilute sulfuric acid of approximately equal acidity. In both cases the neutralising efficiency of the cements, due to dissolution of portlandite as well as the hydrated calcium silicate and aluminate phases, decreased as secondary minerals accumulated on ...
DOI:
10.1016/j.jhazmat.2018.12.035

20. Designing and evaluation of urea microcapsules in vitro to improve nitrogen slow release availability in rumen

Author:
Lira‐Casas, Raymundo; Efren Ramirez‐Bribiesca, J; Zavaleta‐Mancera, Hilda A; Hidalgo‐Moreno, Claudia; Cruz‐Monterrosa, Rosy G; Crosby‐Galvan, María M; Mendez‐Rojas, Miguel A; Domínguez‐Vara, Ignacio A
Source:
Journal of the science of food and agriculture 2019 v.99 no.5 pp. 2541-2547
ISSN:
0022-5142
Subject:
calcium silicate,   etc   ; activated carbon; agitation; ammonium nitrogen; biosynthesis; livestock; methylene chloride; microencapsulation; nitrogen; poisoning; proteins; rumen fluids; temperature; urea;     Show all 14 Subjects
Abstract:
... BACKGROUND: There is a growing interest in the development of novel and innovative vehicles for controlled release of urea into the rumen, aiming to provide ammonia‐N for the biosynthesis of proteins of bacterial origin and to prevent urea intoxication by direct feeding to livestock. Urea microencapsulation is a system that can control the release of urea to be slow and steady. RESULTS: The amount ...
DOI:
10.1002/jsfa.9464