scholarly journals Fly ash-, foundry sand-, clay-, and pumice-based metal oxide nanocomposites as green photocatalysts

RSC Advances ◽  
2021 ◽  
Vol 11 (49) ◽  
pp. 30805-30826
Author(s):  
Bui Thanh Son ◽  
Nguyen Viet Long ◽  
Nguyen Thi Nhat Hang
Keyword(s):  
Fly Ash ◽  
Metal Oxide ◽  
Clay Mineral ◽  
Waste Materials ◽  
Foundry Sand ◽  
Natural Materials ◽  
Recent Advances

This review highlights recent advances in the utilization of natural materials (clay mineral and pumice)- and waste materials (ash and foundry sand)-based metal oxide nanocomposites for photodegradation of various pollutants.

Construction of Road Embankment with Waste Materials

2015 ◽  
Vol 725-726 ◽  
pp. 596-601 ◽  
Author(s):  
Miloš Šešlija ◽  
Nebojša Radović ◽  
Nikolay Vatin
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Thermal Power ◽  
Road Construction ◽  
Waste Materials ◽  
Thermal Power Plants ◽  
Natural Materials

Fly ash represents a residue that occurs as a product of burning finely milled particles of coal in thermal power plants. The fly ash in the construction of embankments in road construction can be used with or without the addition of binders. For the construction of embankment from the ashes, aside embankments (trapezoid shape) are placed. Justification of this study is the fact that so huge amounts of this material are left aside, while there are great possibilities for using of natural materials in the construction of roads.

Transition metal oxide and chalcogenide-based nanomaterials for antibacterial activities: an overview

Nanoscale ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 6373-6388
Author(s):  
Yanan Tang ◽  
Zhen Qin ◽  
Shengyan Yin ◽  
Hang Sun
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Transition Metal Oxide ◽  
Antibacterial Activities ◽  
Practical Applications ◽  
Recent Advances

This review summarizes the recent advances of transition metal oxide and chalcogenide-based antibacterial nanomaterials, with emphasis on their inactivation mechanisms and highlighting their practical applications.

scholarly journals Neutralization of Acidic Wastewater from a Steel Plant by Using CaO-Containing Waste Materials from Pulp and Paper Industries

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2653
Author(s):  
Tova Jarnerud ◽  
Andrey V. Karasev ◽  
Pär G. Jönsson
Keyword(s):  
Fly Ash ◽  
Pulp And Paper ◽  
Waste Materials ◽  
Paper Mills ◽  
Steel Mills ◽  
Lime Mud ◽  
Set Up ◽  
Pulp And Paper Industries ◽  
The Given ◽  
Acidic Wastewater

In this study, CaO-containing wastes from pulp and paper industries such as fly ash (FA) and calcined lime mud (LM) were utilized to neutralize and purify acidic wastewaters from the pickling processes in steel mills. The investigations were conducted by laboratory scale trials using four different batches of wastewaters and additions of two types of CaO-containing waste materials. Primary lime (PL), which is usually used for the neutralization, was also tested in the same experimental set up in the sake of comparison. The results show that these secondary lime sources can effectively increase the pH of the acidic wastewaters as good as the commonly used primary lime. Therefore, these secondary lime sources could be potential candidates for application in neutralization processes of industrial acidic wastewater treatment. Moreover, concentrations of metals (such as Cr, Fe, Ni, Mo and Zn) can decrease dramatically after neutralization by using secondary lime. The LM has a purification effect from the given metals, similar to the PL. Application of fly ash and calcined lime mud as neutralizing agents can reduce the amount of waste from pulp and paper mills sent to landfill and decrease the need for nature lime materials in the steel industry.

Monitoring of Chemical Resistance of New Grouting Materials

2021 ◽  
Vol 898 ◽  
pp. 27-33
Author(s):  
Petr Figala ◽  
Rostislav Drochytka ◽  
Vit Černý ◽  
Radek Hermann ◽  
Jiří Kolísko
Keyword(s):  
Fly Ash ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Waste Glass ◽  
Sulphate Solution ◽  
Sulphate Attack ◽  
Glass Waste ◽  
Foundry Sand ◽  
Waste Foundry Sand ◽  
Grouting Materials

This paper deals with the study of chemical resistance of new cement-based grout for invert grouting. The aim of this work is to verify new mixtures with specific admixtures. The study monitors resistance to external sulphate attack. Specimens were placed into sulphate solution 29.8 g∙l-1 (44 g∙l-1 Na2SO4) according to DIN19753 standard. Based on the results gained, new mixtures will be designed and optimized by addition of suitable secondary raw materials (fly ash, waste foundry sand, waste glass, waste filers).

Recent Advances in Metal Oxide/Carbon Hetro-Nanomaterials for Lithium-Ion Batteries

2014 ◽  
Vol 3 (4) ◽  
pp. 320-329
Author(s):  
Shuzhen Zhang ◽  
Wen He ◽  
Xudong Zhang ◽  
Jingyun Ma ◽  
Caiyun Sun ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Recent Advances

scholarly journals Effect of Fly Ash on the Compressive Strength of Green Concrete

2020 ◽  
Vol 10 (3) ◽  
pp. 5728-5731 ◽  
Author(s):  
S. A. Chandio ◽  
B. A. Memon ◽  
M. Oad ◽  
F. A. Chandio ◽  
M. U. Memon
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Recycled Aggregates ◽  
Waste Materials ◽  
Partial Replacement ◽  
Equal Proportion ◽  
Standard Size ◽  
Green Concrete ◽  
Coarse Aggregates ◽  
Management Issues

This research paper aims at investigating the effects of fly ash as cement replacement in green concrete made with partial replacement of conventional coarse aggregates with coarse aggregates from demolishing waste. Green concrete developed with waste materials is an active area of research as it helps in reducing the waste management issues and protecting the environment. Six concrete mixes were prepared using 1:2:4 ratio and demolishing waste was used in equal proportion with conventional aggregates, whereas fly ash was used from 0%-10% with an increment of 2.5%. The water-cement ratio used was equal to 0.5. Out of these mixes, one mix was prepared with all conventional aggregates and was used as the control, and one mix with 0% fly ash had only conventional and recycled aggregates. The slump test of all mixes was determined. A total of 18 cylinders of standard size were prepared and cured for 28 days. After curing the compressive strength of the specimens was evaluated under gradually increasing load until failure. It is observed that 5% replacement of cement with fly ash and 50% recycled aggregates gives better results. With this level of dosage of two waste materials, the reduction in compressive strength is about 11%.

Effects of Fly Ash and Foundry Sand on Performance of Architectural Precast Concrete

2012 ◽  
Vol 24 (7) ◽  
pp. 851-859 ◽  
Author(s):  
Tarun R. Naik ◽  
Rudolph N. Kraus ◽  
Bruce W. Ramme ◽  
Fethullah Canpolat
Keyword(s):  
Fly Ash ◽  
Precast Concrete ◽  
Foundry Sand
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