Production of nano-calcium carbonate from shells of the freshwater channeled applesnail, Pomacea canaliculata, by hydrothermal treatment and its application with polyvinyl chloride

2014 ◽  
Vol 36 (9) ◽  
pp. 1620-1628 ◽  
Author(s):  
Nittima Rungpin ◽  
Sorapong Pavasupree ◽  
Pattarapan Prasassarakich ◽  
Sirilux Poompradub
Keyword(s):  
Calcium Carbonate ◽  
Hydrothermal Treatment ◽  
Polyvinyl Chloride ◽  
Pomacea Canaliculata

scholarly journals A Simple and Rapid Transformation of Golden Apple Snail (Pomacea canaliculata) Shells to Calcium Carbonate, Monocalcium and Tricalcium Phosphates

2019 ◽  
Vol 31 (11) ◽  
pp. 2522-2526
Author(s):  
S. Seesanong ◽  
C. Laosinwattana ◽  
K. Chaiseeda ◽  
B. Boonchom
Keyword(s):  
Calcium Carbonate ◽  
Tricalcium Phosphate ◽  
Large Scale ◽  
Low Cost ◽  
Pomacea Canaliculata ◽  
Scale Production ◽  
Apple Snail ◽  
Monocalcium Phosphate ◽  
X Ray ◽  
Golden Apple Snail

This study was designed to manage golden apple snail shells, the wastes created in large amount daily from the consumption of the meat of golden apple snail (Pomacea canaliculata) shells by transforming them to advanced compounds; calcium carbonate (CaCO3), monocalcium phosphate monohydrate [Ca(H2PO4)2·H2O], and tricalcium phosphate [Ca3(PO4)2]. They were successfully prepared by a rapid, simple, environmentally benign method using easily available and low-cost instrument. All synthesized samples were characterized by X-ray fluorescence, X-ray powder diffraction, FTIR spectroscopy and scanning electron microscopy to confirm the identities with the standard materials. The reproducibility and low-cost method suggest that it could be used in industry for a large-scale production of calcium carbonate, monocalcium phosphate monohydrate and tricalcium phosphate from golden apple snail shells as a replacement of natural mineral resources and be a good way to manage these shell wastes.

The Various Concentration Effected on Crystallite Size of Calcium Carbonate

2016 ◽  
Vol 675-676 ◽  
pp. 667-670
Author(s):  
Sunti Phewphong ◽  
Kanokwan Najai ◽  
Tosawat Seetawan
Keyword(s):  
Crystal Structure ◽  
Calcium Carbonate ◽  
Crystallite Size ◽  
Single Phase ◽  
Fine Powder ◽  
Diffraction Method ◽  
Pomacea Canaliculata ◽  
Powder Size ◽  
X Ray Diffraction ◽  
Mixed Power

The calcium carbonate was extracted from Pomacea Canaliculata Lamarck (Cherry shell) by using the hydrothermal method. Cherry shell was washed and crushed by DI water and mortar. The powder size was analyzed by particle (aperture Size 63 μm), added x HCl (x = 2, 3, 4) and y Na2CO3 (y = 1, 1.5, 2) mixed with fine powder from Cherry shell. The mixed power was filtered annealed by autoclave at controlled temperature at 333 K for 20 h. The crystal structure was characterized by X−ray diffraction method. The phase transformation of CaCO3 was analyzed by Fourier transform infrared spectroscopy (FTIR). The morphology of Cherry shell and CaCO3 powders were observed by using scanning electron microscope (SEM). It was found that the extracted CaCO3 shows single phase of CaCO3 crystal structure. Smallest crystallite size was found about of 0.54 μm.

Dechlorination of polyvinyl chloride by hydrothermal treatment with cupric ion

2021 ◽  
Vol 146 ◽  
pp. 108-117 ◽  
Author(s):  
Dachao Ma ◽  
Liwu Liang ◽  
Erfeng Hu ◽  
Huaquan Chen ◽  
Dongbo Wang ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Polyvinyl Chloride ◽  
Cupric Ion

scholarly journals Experimental Study on Prevention of Calcium Carbonate Crystallizing in Drainage Pipe of Tunnel Engineering

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yuanfu Zhou ◽  
Xuefu Zhang ◽  
Liangwen Wei ◽  
Shiyang Liu ◽  
Bin Zhang ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Calcium Carbonate ◽  
Polyvinyl Chloride ◽  
Field Experiments ◽  
Field Tests ◽  
Bicarbonate Ions ◽  
In Situ Experiments ◽  
Drainage Pipe ◽  
Self Cleaning ◽  
Main Component

If the tunnel drainage pipes are blocked, the supporting structures will be in danger because they would receive more force than before. In order to investigate the blocking problem, some laboratory tests and in situ experiments were carried out. Microtests showed that the main component of crystal is calcium carbonate. Calcium ions, carbonate ions, and bicarbonate ions of groundwater should be related to the crystal. The polyvinyl chloride pipe, hydrophobic antistatic self-cleaning coated pipe, silicone rubber coated pipe, pipe under electromagnetic field, polytetrafluoroethylene coated pipe, and polyethylene coated pipe were used in laboratory and field experiments. The laboratory results showed that the electromagnetic field may be the best method to prevent crystallization because the crystallizing weight was less than 0.1 g in 30 days. The field tests showed that there was less crystals on the inner surface of hydrophobic antistatic self-cleaning coated pipe than that of the polyvinyl chloride pipe and the polytetrafluoroethylene coated pipe. The crystallization prevention effects of the other experimental pipes need more studies to examine.

scholarly journals Uji Efektivitas Cangkang Keong Mas (Pomacea canaliculata L.) Sebagai Biosorben Dalam Menyerap Logam Berat Merkuri (Hg)

2020 ◽  
Vol 5 (4) ◽  
Author(s):  
Risna Mauriza ◽  
Husnawati Yahya ◽  
T.M. Ashari T.M. Ashari
Keyword(s):  
Calcium Carbonate ◽  
Pomacea Canaliculata ◽  
Snail Shell ◽  
Independent Variables ◽  
Dependent Variables ◽  
Powder Mass ◽  
Stirring Time ◽  
Calculation Results ◽  
Independent Variable ◽  
Shell Powder

Adsorbent is one of the effective solutions to reduce the Hg metal content. The golden snail is a pest for agricultural and contains high of calcium carbonate. However, calcium carbonate can be used as an adsorbent. This study aimed to examine the effectiveness of golden snail shell powder in absorbing Hg metal. This research is a quantitative study consisting of dependent variables and independent variables. The dependent variable involved a concentration of 10 ppm mercury, and 100 rpm stirring time speed while the independent variable included of variations in powder mass and stirring time. The mass of golden snail powder used those are 0 gr, 5 gr, 10 gr, 15 gr, and 20 gr with a variation of stirring time for 15 minutes and 30 minutes for each sample of Hg metals. Each Hg sample was used at a concentration of 10 ppm. The calculation results obtained that the effectiveness of golden snail shell powder in absorbing Hg 10 ppm was the mass of 20 grams of golden snail powder with a stirring time of 30 minutes that was equal to 99.87% with the result of a decrease in concentration of 10 ppm Hg to 0.01 Hg ppm.

Basic Properties of Starfish Derived Calcium Carbonate and its Phase Transformation to Carbonate Apatite

2012 ◽  
Vol 529-530 ◽  
pp. 40-43
Author(s):  
Daiki Honda ◽  
Akari Takeuchi ◽  
Ishikawa Kunio
Keyword(s):  
Aqueous Solution ◽  
Phase Transformation ◽  
Calcium Carbonate ◽  
Porous Structure ◽  
Pore Size ◽  
Hydrothermal Treatment ◽  
Bone Substitute ◽  
Source Material ◽  
Carbonate Apatite ◽  
Porous Calcium Carbonate

Feasibility of starfish bone to be a source material for apatite bone substitute was investigated in the present study because starfish bone is known to be porous calcium carbonate. Starfish bone was assembly of Mg containing calcite granules. And the calcite granules had fully interconnected porous structure with approximately 20 µm of pore size. After the hydrothermal treatment of the calcite granules in Na2HPO4 aqueous solution, the granules were gradually transformed to apatite. Therefore, starfish derived calcium carbonate would be a candidate of a source material for carbonate apatite bone substitute.

Orientation of Hydroxyapatite Rods Formed by Hydrothermal Treatment of Calcium Carbonate

2012 ◽  
Vol 529-530 ◽  
pp. 7-10
Author(s):  
Ill Yong Kim ◽  
Koichi Kikuta ◽  
Chikara Ohtsuki
Keyword(s):  
Calcium Carbonate ◽  
Hydrothermal Treatment ◽  
Cross Sections ◽  
Hydrothermal Condition ◽  
Bone Defects ◽  
Starting Material ◽  
Phosphate Solution ◽  
Hydrothermal Processing ◽  
Bioactive Materials ◽  
The Difference

Morphological control on hydroxyapatite (HAp) crystals is one of attractive researches to produce novel bioactive materials for repairing bone defects. Hydrothermal processing has been applied to fabricate well-grown crystals of HAp, through a reaction from appropriate calcium and phosphate sources. We recently found that oriented structure was observed when single crystal of calcium carbonate was used as a starting material for the hydrothermal processing. However, the detailed process on the orientation of HAp crystals has been not clarified yet. In the present study, we investigated the effects of the crystalline planes of calcite on HAp formation through the hydrothermal condition. Calcite single crystals with either of {100} or (111) plane was used as a starting material to examine the difference of the reactivity in a phosphate solution. After the hydrothermal treatment at 160 °C for 24 h, the surfaces and cross-sections of starting materials were characterized. Rod-shaped HAp crystals were oriented on the surface of the starting material with {100} plane, whereas small HAp crystals formed on the starting material with (111) plane followed by growth to same direction that were observed on the sample with the {100} plane. The difference in the morphology of the formed HAp was caused by the reactivity of each crystal plane.

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