scholarly journals The Processing of Calcium Rich Agricultural and Industrial Waste for Recovery of Calcium Carbonate and Calcium Oxide and Their Application for Environmental Cleanup: A Review

2021 ◽  
Vol 11 (9) ◽  
pp. 4212
Author(s):  
Virendra Kumar Yadav ◽  
Krishna Kumar Yadav ◽  
Marina M. S. Cabral-Pinto ◽  
Nisha Choudhary ◽  
Govindhan Gnanamoorthy ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Calcium Oxide ◽  
Industrial Waste ◽  
Environmental Cleanup ◽  
Oxide Particles ◽  
Biological Sources ◽  
Egg Shell ◽  
Physical And Chemical ◽  
By Products ◽  
Land Filling

Every year a million tonnes of calcium rich agro and industrial waste are generated around the whole globe. These calcium rich waste like finger citron, shells of cockle, mussel, oysters etc., and egg shell are biological sources which have various organic compounds. The inorganic calcium rich waste includes gypsum, dolomite, sludge etc., which are produced in surplus amount globally. Most of these by-products are mainly dumped, while few are used for land-filling purposes which leads to the pollution. These agro and industrial by-products could be processed for the recovery of calcium carbonate and calcium oxide particles by physical and chemical method. The recovery of calcium carbonate and calcium oxide particles from such by products make them biocompatible. Moreover, the products are economical due to their synthesis from waste materials. Here, in this current review work we have emphasized on the all the calcium rich agro industries and industrial by products, especially their processing by various approaches. Further, we have also focused on the properties and application of such calcium carbonate and oxide particles for the remediation of organic and inorganic pollutants from the environments. The recovery of such particles from these byproducts is considered not only economical and eco-friendly but it also minimizes the pollution present in the form of solid waste.

Design of a Solar Thermochemical Reactor for Calcium Oxide Based Carbon Dioxide Capture

2015 ◽  
Author(s):  
Leanne Reich ◽  
Luke Melmoth ◽  
Robert Gresham ◽  
Terrence Simon ◽  
Wojciech Lipiński
Keyword(s):  
Carbon Dioxide ◽  
Calcium Carbonate ◽  
Calcium Oxide ◽  
Thermal Analyses ◽  
Reactor Design ◽  
Gas Flows ◽  
Carbonate Carbon ◽  
Calcination Step ◽  
Oxide Particles ◽  
Concentrated Solar Radiation

An engineering design for a 1-kW dual-cavity solar-driven reactor to capture carbon dioxide via the calcium oxide based two-step carbonation-calcination cycle is presented. In the low temperature carbonation step, gas containing up to 15% carbon dioxide flows through a gas manifold and plenum into an annular reaction zone filled with calcium oxide particles. The carbon dioxide reacts with the calcium oxide, forming calcium carbonate. Carbon dioxide-depleted gas flows out of the reactor through a second gas manifold. In the high temperature calcination step, concentrated solar radiation enters the beam-up oriented, windowless reactor and is absorbed by the diathermal cavity wall, which transfers heat via conduction to the calcium carbonate particles formed in the previous step. The calcium carbonate dissociates into calcium oxide and carbon dioxide. Additional carbon dioxide is used as a sweep gas to ensure high purity carbon dioxide at the outlet. Mechanical and thermal analyses are conducted to refine an initial reactor design and identify potential design shortcomings. Numerically predicted temperature profiles in the reactor are presented and the final reactor design is established.

scholarly journals Study on the possibilities of treatment of combustion by-products from fluidized bed boilers into a product devoid of free calcium oxide

2015 ◽  
Vol 14 (4) ◽  
pp. 164-172 ◽  
Author(s):  
Jacek M. Łączny ◽  
Sebastian Iwaszenko ◽  
Krzysztof Gogola ◽  
Andrzej Bajerski ◽  
Tomasz Janoszek ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Calcium Oxide ◽  
Free Calcium ◽  
Fluidized Bed Boilers ◽  
By Products

Effectiveness of Steam Treating Method on Inhibiting the Expansive Problem of Concrete with Slag as Aggregate

2013 ◽  
Vol 723 ◽  
pp. 609-616
Author(s):  
Wei Chien Wang ◽  
Chih Chien Liu ◽  
Chau Lee
Keyword(s):  
Magnesium Oxide ◽  
Calcium Oxide ◽  
Steel Industry ◽  
Volume Expansion ◽  
Steam Treatment ◽  
Free Calcium ◽  
Concrete Aggregate ◽  
Furnace Slag ◽  
By Products

The furnace slag are the by-products of the steel industry, the main ingredients are the oxide of calcium, alumina and magnesium, and some silica. Slag used as concrete aggregate could cause the problem of the volume expansion of concrete. The expansion problem may be produced by ASR or free calcium oxide and magnesium oxide in slag. This research stabilizing the non-ASR reactive slag using steam treatment analyzes the effectiveness of steam treating technique inhibiting the expansive problem for slag used in concrete. And this paper also discusses the effect of the steam treating time on the performance of inhibiting the expansive problem.

scholarly journals Effect of Turmeric Powder Supplementation to The Age of Sexual Maturity, Physical, and Chemical Quality of The First Japanese Quail’s (Coturnix japonica) Egg

2016 ◽  
Vol 8 (1) ◽  
pp. 18 ◽  
Author(s):  
Tyas Rini Saraswati ◽  
Silvana Tana
Keyword(s):  
Vitamin A ◽  
Feed Intake ◽  
Sexual Maturity ◽  
Biology Education ◽  
Coturnix Japonica ◽  
Chemical Quality ◽  
Physical And Chemical Quality ◽  
Egg Shell ◽  
Physical And Chemical

<p>The experiment was conducted to determine the effect of turmeric powder supplementation to the age of sexual maturity, physical, and chemical quality of the first Japanese quail’s (Coturnix japonica) egg. Forty five quails were assigned into a completely randomized design with three treatments (levels of turmeric powder, i.e., 0; 54; and 108 mg/quail/day) and each treatment used 15 quails. Turmeric powder supplementation was conducted before sexual maturity. Feed and drinking water provided ad libitum. Observed egg is an egg that was first produced. Parameters measured were the age of sexual maturity, feed intake, body weight, physical qualities which include: weight of egg, long axis, short axis, weight and thickness of shell, yolk index, Haugh unit, egg shell index. Whereas the observed chemical quality were cholesterol, HDL, LDL, protein, vitamin B12, vitamin A in eggs and egg shell calcium levels. The results showed that administration of turmeric powder can accelerate the age of maturity, increasing the levels of protein, HDL, vitamin A and B12 in eggs, decreasing the cholesterol and LDL content in eggs, but did not affect feed intake, physical quality of eggs and egg shell calcium levels. Based on the results of this study, it can be concluded that supplementation of turmeric powder improve the chemical quality of Japanese quail eggs (Coturnix japonica), so it is good for the development of quail embryos as well as for consumption.</p><p><strong>How to Cite</strong></p><p>Saraswati, T. R., &amp; Tana, S. (2016). Effect of Turmeric Powder Supplementation To The Age of Sexual Maturity, Physical, and Chemical Quality of The First Japanese Quail’s (Coturnix japonica) Egg. <em>Biosaintifika: Journal of Biology &amp; Biology Education</em>, 8(1), 18-24.</p>

scholarly journals Development of Immediate Release Tablets Containing Calcium Lactate Synthetized from Black Sea Mussel Shells

Marine Drugs ◽  
2022 ◽  
Vol 20 (1) ◽  
pp. 45
Author(s):  
Magdalena Mititelu ◽  
Elena Moroșan ◽  
Anca Cecilia Nicoară ◽  
Ana Andreea Secăreanu ◽  
Adina Magdalena Musuc ◽  
...  
Keyword(s):  
Black Sea ◽  
Pharmaceutical Preparations ◽  
Chemical Compounds ◽  
Immediate Release ◽  
Calcium Lactate ◽  
Calcium Source ◽  
Potential Applications ◽  
Mussel Shells ◽  
Physical And Chemical ◽  
By Products

Nowadays, the use of marine by-products as precursor materials has gained great interest in the extraction and production of chemical compounds with suitable properties and possible pharmaceutical applications. The present paper presents the development of a new immediate release tablet containing calcium lactate obtained from Black Sea mussel shells. Compared with other calcium salts, calcium lactate has good solubility and bioavailability. In the pharmaceutical preparations, calcium lactate was extensively utilized as a calcium source for preventing and treating calcium deficiencies. The physical and chemical characteristics of synthesized calcium lactate were evaluated using Fourier Transform Infrared Spectroscopy, X-ray diffraction analysis and thermal analysis. Further, the various pharmacotechnical properties of the calcium lactate obtained from mussel shells were determined in comparison with an industrial used direct compressible Calcium lactate DC (PURACAL®). The obtained results suggest that mussel shell by-products are suitable for the development of chemical compounds with potential applications in the pharmaceutical domain.

scholarly journals First-principles study of calcium-based sulfur fixers and their products

2021 ◽  
pp. 350-350
Author(s):  
Guoyan Chen ◽  
Jianing Chen ◽  
Anchao Zhang ◽  
Haoxin Deng ◽  
Yanyang Mei ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Power Plant ◽  
Thermodynamic Properties ◽  
Calcium Oxide ◽  
First Principles ◽  
Calcium Sulfate ◽  
Density Functional ◽  
Stable State ◽  
Generalized Gradient ◽  
Calcium Sulphoaluminate

Calcium-based sulfur-fixing agent, as the main sulfur-fixing product, is widely used in power plant boiler systems. In order to further study the thermodynamic properties and reaction characteristics of calcium-based sulfur fixing agent and its products, the method of combining power plant experiment with theory was used. The electronic structure, thermodynamic properties and density of states of quicklime, limestone, calcium sulfate and calcium sulphoaluminate have been calculated based on the first-principles ultra-soft pseudopotential plane wave method of density functional theory. The generalized gradient approximation algorithm isused to optimize the structure of various minerals to achieve the most stable state. The results show that the enthalpy, entropy, specific heat capacity at constant pressure and Gibbs free energy of calcium sulfonate vary greatly from 25K to 1000K, while the change of calcium oxide is small, and that of calcium carbonate and calcium sulfate are between them. It shows that calcium sulphoaluminate has strong stability and more energy is needed to destroy the molecular structure of calcium sulphoaluminate. Calcium oxide is the most unstable and requires less energy to react; Calcium carbonate and calcium sulfate are in between. The variation range of calcium sulfate is greater than that of calcium carbonate, indicating that the stability of calcium sulfate is higher than that of calcium carbonate. The experimental results show that the desulfurization efficiency of generating calcium sulphoaluminate is much higher than that of only generating calcium sulfate, indicating that calcium sulphoaluminate is very stable, which is consistent with the calculated results.

scholarly journals Study on the possibilities of treatment of combustion by-products from fluidized bed boilers into a product devoid of free calcium oxide

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Jacek M. Łączny ◽  
Sebastian Iwaszenko ◽  
Krzysztof Gogola ◽  
Andrzej Bajerski ◽  
Tomasz Janoszek ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Calcium Oxide ◽  
Free Calcium ◽  
Fluidized Bed Boilers ◽  
By Products
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