Statistical assessment of physicomechanical properties of refractory ceramics based on petroleum waste sludge -bauxite compositions

2020 ◽  
Vol 9 (2) ◽  
pp. 75-88
Keyword(s):  
Physicomechanical Properties ◽  
Statistical Assessment ◽  
Petroleum Waste ◽  
Waste Sludge ◽  
Refractory Ceramics

Utilization of petroleum sludge wastes for increasing productivity of ordinary portland cement

2021 ◽  
Vol 19 (4) ◽  
pp. 315-328
Author(s):  
N.M. Khalil ◽  
Yousif Algamal
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Production Capacity ◽  
Hydration Product ◽  
High Energy ◽  
Cement Industry ◽  
Blended Cements ◽  
Petroleum Waste ◽  
Waste Sludge ◽  
Suitable Amount

This work aims at maximum exploitation of petroleum waste sludge as additive to portland cement to prepare blended cements and hence increasing its production capacity without further firing. This will decrease the main cement industry problems involving environmental pollution such as releasing gases and high-energy consumption during industry and hence maximizes the production economics. Six batches of ordinary portland cement (OPC) mixed with different proportions of petroleum waste sludge (PWS) donated as C1 (control batch contains no PWS), C2 (contains 90 wt.% of OPC+10 wt.% of PWS), C3 (contains 80 wt.% of OPC+20 wt.% of PWS), C4 (contains 70 wt.% of OPC+30 wt.% of PWS), C4 (contains 60 wt.% of OPC+40 wt.% of PWS) and C6 (contains 50 wt.% of OPC+50 wt.% of PWS), were prepared and mixed individually with the suitable amount of mixing water. Cement mixes C2, C3 and C4 showed improved cementing and physicomechanical properties compared with pure cement (C1) with special concern of mix C4. Such improvement is due to the relatively higher surface area as well as the high content of kaolinite and quartz in the added PWS (high pozzalanity) favoring the hydration process evidenced by the increase in the cement hydration product (portlandite mineral (Ca (OH) 2).

Extraction of barium oxide nanoparticles from petroleum waste sludge wastes

2021 ◽  
pp. 1-7
Author(s):  
N.M. Khalil ◽  
Yousif Algamal
Keyword(s):  
Barium Oxide ◽  
Mineralogical Composition ◽  
Nano Particles ◽  
Oxide Nanoparticles ◽  
Petroleum Waste ◽  
Calcination Temperatures ◽  
Waste Sludge ◽  
Oxide Particles ◽  
Nano Size ◽  
Spot Analysis

Petroleum Waste sludge (PWS) could be used as unusual source for the extraction of barium oxide nanoparticles. A hydrothermal method was adapted to precipitate barium as barium hydroxide that calcined at different calcination temperatures up to 1000 °C to obtain barium oxide nano particles. The mineralogical composition, morphology, particle size and spot analysis of the extracted particles were followed using XRD and SEM+EDAX techniques. These investigations confirmed the purity and nano size of barium oxide particles extracted from PWS at 600 °C.

Bacterial community dynamics during in-situ bioremediation of petroleum waste sludge in landfarming sites

2005 ◽  
Vol 16 (2) ◽  
pp. 169-180 ◽  
Author(s):  
E. Katsivela ◽  
E. R. B. Moore ◽  
D. Maroukli ◽  
C. Str�mpl ◽  
D. Pieper ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Community Dynamics ◽  
In Situ Bioremediation ◽  
Petroleum Waste ◽  
Waste Sludge ◽  
Bacterial Community Dynamics

scholarly journals Activated petroleum waste sludge biochar for efficient catalytic ozonation of refinery wastewater

2019 ◽  
Vol 651 ◽  
pp. 2631-2640 ◽  
Author(s):  
Chunmao Chen ◽  
Xin Yan ◽  
YingYing Xu ◽  
Brandon A. Yoza ◽  
Xin Wang ◽  
...  
Keyword(s):  
Catalytic Ozonation ◽  
Refinery Wastewater ◽  
Petroleum Waste ◽  
Waste Sludge

Lattice Imaging of Grain Boundaries in Ceramics

1977 ◽  
Vol 35 ◽  
pp. 114-115
Author(s):  
D. R. Clarke ◽  
G. Thomas
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Grain Boundaries ◽  
High Temperature Strength ◽  
Current Interest ◽  
Lattice Imaging ◽  
Special Significance ◽  
Structural Applications ◽  
Refractory Ceramics

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.

Assessing Language Acquisition and Intercultural Sensitivity Development in Relation to Study Abroad Program Design

2004 ◽  
Vol 10 (1) ◽  
pp. 219-236 ◽  
Author(s):  
Lilli Engle ◽  
John Engle
Keyword(s):  
Language Acquisition ◽  
Study Abroad ◽  
International Education ◽  
Program Design ◽  
Intercultural Sensitivity ◽  
Outcomes Assessment ◽  
Statistical Assessment ◽  
Preliminary Examination ◽  
Study Abroad Program

The complexity of international education is such that it is far from easy to move towards significant, objectively measurable, and comparable outcomes. What follows is the preliminary examination of one attempt to generate and interpret meaningful statistical assessment of the study abroad experience, within the context of specifically defined study abroad program types. We will examine the data thus far generated, suggest its limitations, and appeal for a continued gathering of information. We will suggest a structured, coordinated, profession-wide assessment effort that will, we hope, gradually reveal a useful correlation between study abroad learning and the input of program variables such as duration, housing, experiential work and on-site mentoring. If, as a profession, study abroad is to invest in outcomes assessment, it would be sensible for such efforts to utilize profession-wide definitions and standards.

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