Simple and Rapid Synthesis of Calcium Acetate from Scallop Shells to Reduce Environmental Issues

Thongkam, Montree; Saelim, Jinnaput; Boonchom, Banjong; Seesanong, Somkiat; Chaiseeda, Kittichai; Laohavisuti, Nongnuch; Bunya-atichart, K.; Boonmee, Wimonmat; Taemchuay, Duangkamol

doi:10.1155/2021/6450289

Cited by 16 publications

(26 citation statements)

References 46 publications

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“…CaA appeared as timber or flute-like columns. PXRD and SEM results confirmed the solid phase of CaA and they were compared to those of literatures and found to be well consistent [39][40] .…”

Section: Semsupporting

confidence: 73%

The use of hydrophilic carrier derived from eggshell and novel gel forming technique in a solid dispersion system

Myint¹,

Lawanprasert²,

Puttipipatkhachorn³

et al. 2023

Pharm Sci Asia

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The study aimed to prepare calcium acetate (CaA) from the eggshell (ES) by the chemical reaction with aqueous acetic acid and to improve the dissolution properties of poorly soluble model drug, chloroxylenol (CXN), by solid dispersion (SD) system with CaA as a carrier. In the present study, SDs were prepared by two methods using various drug:carrier ratios. Fourier-transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), thermal analysis and scanning electron microscope (SEM) studies were carried out to characterize the prepared SDs in comparison with pure drug and physical mixtures (PMs). FTIR analysis indicated that there was an intermolecular hydrogen bonding between the terminal hydroxyl group of drug and water molecules of CaA. Decrease in crystallinity of SDs was observed in PXRD and differential scanning calorimetry (DSC) studies. Moreover, thermogravimetric analysis (TGA) study showed the drug protected within SD. SEM images revealed the morphology of SDs prepared by the gel forming technique as a rod-like microstructure in which the drug was occupied. The rough surface of SD prepared by the wet granulation method was due to the adherence of drug particles on the surface of CaA. SDs prepared by the gel method exhibited superior performance for the dissolution of CXN with a release of 93-113% at 60 min compared to PMs and pure CXN, which could be due to its transformation from crystalline to amorphous form as well as the improved wettability. Therefore, CaA might be the potential candidate for the dissolution enhancement of poorly soluble drugs.

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Section: Semsupporting

confidence: 73%

The use of hydrophilic carrier derived from eggshell and novel gel forming technique in a solid dispersion system

Myint¹,

Lawanprasert²,

Puttipipatkhachorn³

et al. 2023

Pharm Sci Asia

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“…The XRD pattern clearly showed that the product synthesized from the reaction between the bio-green CaCO 3 and CH 3 COOH is the calcium acetate monohydrate (C 4 H 6 CaO 4 •H 2 O or Ca(CH 3 COO) 2 •H 2 O), which was found to match with the JCPDS card #19-0200 [45]. This JCPDS number obtained in this work is different from that of Ca(CH 3 COO) 2 •H 2 O prepared from scallop shell in literature (JCPDS card #19-0200) [23] samples. The total mass-loss percentage was ~65%, whereas the retained mass percentage was ~35%.…”

Section: Xrdmentioning

confidence: 53%

“…The results of TG and DTG from this work show that the thermal decomposition of the synthesized Ca(CH 3 COO) [21], black snail [22] and scallop [23] shells which depended on the crystal structure and particle sizes of the starting materials.…”

Section: Xrdmentioning

confidence: 98%

“…The Spectrum GX FTIR spectrophotometer was applied to investigate the vibrational spectroscopy of the synthesized Ca(CH 3 COO) Thongkam et al [23], in a previous report of calcium acetate prepared from oyster shells and scallop shells. Therefore, the FTIR spectra of all prepared samples con rmed that the synthesized products are calcium acetate monohydrate (Ca(CH 3 COO) 2 •H 2 O).…”

Section: Ftirmentioning

confidence: 99%

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Bio-green synthesis of calcium acetate from oyster shell waste at low cost and reducing the emission of greenhouse gases

Seesanong

Seangarun

Boonchom

et al. 2023

Preprint

Self Cite

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Bio-green synthesis was designed and employed for calcium acetate monohydrate (Ca(CH3COO)2·H2O) preparation. Biological wastes obtained from food, oyster shells, were recycled to calcium carbonate and then were used as bio-green raw material to replace limestone/carbonate stone for calcium acetate production. The conditions (ambient temperature occurred in an exothermic reaction, drying time, percentage yield, and percentage solubility) of the reaction between the bio-green CaCO3 and three different acetic (CH3COOH) concentrations (8, 10, and 12 mol·L−1) were investigated. The maximum percentage yield (93.42%) with a shorter drying time (18 h) affected the low cost of the product found in the reaction between the bio-green CaCO3 with 12 mol·L−1 acetic acid. The percentage solubility and chemical compositions without any toxic metal impurity revealed by the XRF technique would be useful to suggest use in the specific application. The XRD, FTIR, and TGA data of Ca(CH3COO)2·H2O prepared by the bio-green CaCO3 obtained from oyster shell wastes in this work and those in previous works used other calcium sources were consistent. The morphologies with different sizes of the obtained Ca(CH3COO)2•H2O depend on the CH3COOH concentrations reported in this work and were different from those reported in previous works because of different calcium sources. According to the observation, it can be concluded that the low-cost and bio-green technique without the environmental effects was successfully applied to produce cheap Ca(CH3COO)2•H2O and reduce greenhouse gas emissions, which can be used in the specific industry.

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“…Mollusk-derived CaCO 3 powders could be obtained by simple and low-cost preparations, including protein removal, washing, drying, and milling, respectively [15] . After that, CaCO 3 -based waste shell powders can be used as a renewable calcium source to prepare value-added calcium compounds such as calcium oxide [16] , calcium hydroxide [17] , calcium phosphate [18] , calcium citrate [19] , calcium acetate [20] , and calcium lactate [15] . Phosphate rocks originated from fossilized animal bone deposits [21] , which can be used as a phosphorus source to produce phosphoric acid [22] and as fertilizer [23] .…”

Section: Introductionmentioning

confidence: 99%

Untitled Document

Seesanong

Seangarun

Boonchom

et al. 2023

Preprint

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High consumption of mollusk shells generates many waste mollusk shells. To reduce and utilize these wastes, they can be cleaned and milled to produce calcium carbonate (CaCO3) powders, which can be further used as raw material for producing valuable products. This research presents a simple, cheap, and environmentally friendly preparation of calcium phosphates by using waste mollusk shells as a renewable source. All synthesized calcium phosphate samples were characterized and confirmed by X-ray fluorescence, X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and thermal analysis. The addition of phosphoric acid to mollusk-derived CaCO3 generated triple superphosphate (TSP), which was consisting of two or more calcium phosphate compounds. After the TSP powder was dissolved in water, non-soluble powders were obtained and found to be dicalcium phosphate dihydrate (DCPD, CaHPO4•2H2O). After removing non-soluble compounds and then the self-evaporating process of the solution fraction to dryness, the recrystallized product was investigated and confirmed as monocalcium phosphate monohydrate (MCPM, Ca(H2PO4)2•H2O). This recrystallization process produced highly purified Ca(H2PO4)2•H2O with high solubility and phosphorus content that can be used as an effective fertilizer. The green and low-cost preparation of calcium phosphates proposed in this research will be valuable to reduce waste mollusk shells by reforming them into value-added products. This information points out the viewpoint of a zero-waste operation for obtaining sustainable development, which could be selected as an effective technique for waste management and recycling.

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Simple and Rapid Synthesis of Calcium Acetate from Scallop Shells to Reduce Environmental Issues

Cited by 16 publications

References 46 publications

The use of hydrophilic carrier derived from eggshell and novel gel forming technique in a solid dispersion system

The use of hydrophilic carrier derived from eggshell and novel gel forming technique in a solid dispersion system

Bio-green synthesis of calcium acetate from oyster shell waste at low cost and reducing the emission of greenhouse gases

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