scholarly journals Scientific Appraisal of Classical Calcination Process of Kushta (Calx) in Reference to Calx of Copper Sulphate

2021 ◽  
Vol 11 (4) ◽  
pp. 368-373
Author(s):  
Sumera Mehfooz ◽  
Abdul Wadud ◽  
Hamiduddin Hamiduddin ◽  
Rajeev Ranjan
Keyword(s):  
Copper Sulphate ◽  
Calcination Process

Impact Strength, Flexural Modulus and Wear Rate of PMMA Composites Reinforced by Eggshell Powders

2020 ◽  
Vol 38 (7A) ◽  
pp. 960-966
Author(s):  
Aseel M. Abdullah ◽  
Hussein Jaber ◽  
Hanaa A. Al-Kaisy
Keyword(s):  
Impact Strength ◽  
Wear Rate ◽  
Flexural Modulus ◽  
Matrix Material ◽  
Weight Fraction ◽  
Pure Pmma ◽  
Calcination Process ◽  
The Matrix ◽  
The Impact ◽  
Interface Bond

In the present study, the impact strength, flexural modulus, and wear rate of poly methyl methacrylate (PMMA) with eggshell powder (ESP) composites have been investigated. The PMMA used as a matrix material reinforced with ESP at two different states (including untreated eggshell powder (UTESP) and treated eggshell powder (TESP)). Both UTESP and TESP were mixed with PMMA at different weight fractions ranged from (1-5) wt.%. The results revealed that the mechanical properties of the PMMA/ESP composites were enhanced steadily with increasing eggshell contents. The samples with 5 wt.% of UTESP and TESP additions give the maximum values of impact strength, about twice the value of the pure PMMA sample. The calcination process of eggshells powders gives better properties of the PMMA samples compared with the UTESP at the same weight fraction due to improvements in the interface bond between the matrix and particles. The wear characteristics of the PMMA composites decrease by about 57% with increases the weight fraction of TESP up to 5 wt.%. The flexural modulus values are slightly enhanced by increasing of the ESP contents in the PMMA composites.

Comparison of copper sulphate pentahydrate growth rates determined by different methods

1990 ◽  
Vol 55 (7) ◽  
pp. 1691-1707 ◽  
Author(s):  
Miloslav Karel ◽  
Jiří Hostomský ◽  
Jaroslav Nývlt ◽  
Axel König
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Fluidized Bed ◽  
Growth Rates ◽  
Copper Sulphate ◽  
Crystal Growth Rate ◽  
Effect Of Temperature ◽  
Rotating Disc ◽  
Shape Factors ◽  
Data Treatment

Crystal growth rates of copper sulphate pentahydrate (CuSO4.5 H2O) determined by different authors and methods are compared. The methods included in this comparison are: (i) Measurement on a fixed crystal suspended in a streaming solution, (ii) measurement on a rotating disc, (iii) measurement in a fluidized bed, (iv) measurement in an agitated suspension. The comparison involves critical estimation of the supersaturation used in measurements, of shape factors used for data treatment and a correction for the effect of temperature. Conclusions are drawn for the choice of values to be specified when data of crystal growth rate measurements are published.

scholarly journals Energy-Saving Strategy for a Transport Bed Flash Calcination Process Applied to Magnesite

2021 ◽  
Author(s):  
Ping An ◽  
Zhennan Han ◽  
Kangjun Wang ◽  
Jiguang Cheng ◽  
Zhongkai Zhao ◽  
...  
Keyword(s):  
Energy Saving ◽  
Calcination Process ◽  
Flash Calcination

Growth mechanism of rGO/CDs by electrospun calcination process: Structure and application

FlatChem ◽  
2020 ◽  
Vol 24 ◽  
pp. 100195
Author(s):  
Vinit Sharma ◽  
Gun Anit Kaur ◽  
Neeraj Gupta ◽  
Mamta Shandilya
Keyword(s):  
Growth Mechanism ◽  
Calcination Process ◽  
Process Structure

Sorption Profile of Hg(II) onto Mixed Phase of Copper Sulphide and Copper Sulphate

2011 ◽  
Vol 356-360 ◽  
pp. 537-546
Author(s):  
Yow Loo Au Yoong ◽  
Pei Lay Yap ◽  
Muralithran G. Kutty ◽  
Olaf Timpe ◽  
Malte Behrens ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Copper Sulphate ◽  
Surface Complexation ◽  
Mixed Phase ◽  
Copper Sulphide ◽  
Reaction Parameters ◽  
Sorption Behaviour ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Equilibrium Data

The use of surface oxidized covellite (CuS), namely mixed phase copper sulphide (CuS and CuSO4) was studied for the removal of mercury from aqueous solution under the effect of various reaction parameters (pH, time, Hg(II) concentration). From batch sorption studies, the equilibrium data revealed that the sorption behaviour of Hg(II) onto mixed phase copper sulphide follows well with Langmuir isotherm and the maximum sorption capacity (Qmax) determined ≈ 400mg Hg(II) /g of sorbent. Meanwhile, all the unreacted and reacted mixed phase copper sulphides were also characterized by Powder XRD, SEM and XPS techniques. The results indicated that the sorption of Hg(II) onto mixed phase copper sulphide occurs initially through the dissolution of surface oxidized CuSO4layer. After that, the surface complexation product formed and sorbed onto the surface of CuS. These outcomes suggest the potential ability of CuS in removing Hg(II) even if the CuS layer is being surrounded by oxidized layer of CuSO4.

Structural and optical amendment ofPVDF into CQDsthrough high temperature calcination process

2021 ◽  
pp. 130616
Author(s):  
Gun Anit Kaur ◽  
Vinit Sharma ◽  
Neeraj Gupta ◽  
Mamta Shandilya ◽  
Radheshyam Rai
Keyword(s):  
High Temperature ◽  
Calcination Process ◽  
High Temperature Calcination
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