Sustainable Production and Physicochemical Characteristics of Calcium Sulfate Dihydrate Prepared from Waste Eggshells

被引：2

作者：

Seesanong, Somkiat ^{[1
]}

Seangarun, Chaowared ^{[2
]}

Boonchom, Banjong ^{[2
,3
,4
]}

Laohavisuti, Nongnuch ^{[5
]}

Boonmee, Wimonmat ^{[6
]}

Rungrojchaipon, Pesak ^{[4
]}

Phimsirikul, Phairat ^{[1
]}

机构：

[1] King Mongkuts Inst Technol Ladkrabang, Sch Agr Technol, Off Adm Interdisciplinary Program Agr Technol, Bangkok 10520, Thailand

[2] King Mongkuts Inst Technol Ladkrabang, Sch Sci, Mat Sci Environm Sustainabil Res Unit, Bangkok 10520, Thailand

[3] King Mongkuts Inst Technol Ladkrabang, Municipal Waste & Wastewater Management Learning C, Sch Sci, Bangkok 10520, Thailand

[4] King Mongkuts Inst Technol Ladkrabang, Sch Sci, Dept Chem, Bangkok 10520, Thailand

[5] King Mongkuts Inst Technol Ladkrabang, Sch Agr Technol, Dept Anim Prod Technol & Fishery, Bangkok 10520, Thailand

[6] King Mongkuts Inst Technol Ladkrabang, Sch Sci, Dept Biol, Bangkok 10520, Thailand

来源：

CRYSTALS | 2024年 / 14卷 / 07期

关键词：

eco-friendly preparation; calcium sulfate; gypsum; eggshell waste; renewable material; sustainability; CRYSTAL-STRUCTURE; GYPSUM; CRYSTALLIZATION; ANHYDRITE; CARBONATE; PRESSURE; BEHAVIOR; CASO4;

D O I：

10.3390/cryst14070577

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Gypsum products (calcium sulfate dihydrate, CaSO4<middle dot>2H2O) were synthesized through an eco-friendly and low-cost process by two different renewable calcium carbonate sources (CaCO3), hen and duck eggshell wastes, with product yields obtained of 84.73 and 87.74%, respectively. The X-ray fluorescence results indicated that calcium oxide (CaO) and sulfur trioxide (SO3) are the major elemental components of CaSO4<middle dot>2H2O prepared from both calcium sources. The Fourier transform infrared results confirmed the vibrational characteristics of SO42- and H2O functional groups in the chemical structure of the prepared samples. The X-ray diffraction patterns of CaSO4<middle dot>2H2O prepared from both calcium sources confirmed the sample's crystal structure as well as the chemical formula, after comparing them to the standard powder diffraction file. The crystallite sizes of CaSO4<middle dot>2H2O products were calculated from the experimental diffraction peak through the Scherrer equation and found to be 19-20 nm. The positive preferential growth (Pg) value highlighted the excellent stability of the synthesized CaSO4<middle dot>2H2O. The scanning electron microscopic results showed the agglomeration particles of hen- and duck-CaCO3 raw agents, whereas plate-like particles were observed for hen- and duck-CaSO4<middle dot>2H2O products but the particle sizes were different.

引用

页数：16

共 57 条

[41] Texture and structural refinement using neutron diffraction data from molybdite (MoO3) and calcite (CaCO3) powders and a Ni-rich Ni50.7Ti49.30 alloy [J].