Treatment of Cd2+ and Cu2+ Ions Using Modified Apatite Ore

Autor: Phuong Thu Nguyen, Xuyen Thi Nguyen, Trang Van Nguyen, Thom Thi Nguyen, Thai Quoc Vu, Huy Trung Nguyen, Nam Thi Pham, Thanh Mai Thi Dinh
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Chemistry, Vol 2020 (2020)
Druh dokumentu: article
ISSN: 2090-9063
2090-9071
DOI: 10.1155/2020/6527197
Popis: Apatite ore from Lao Cai (Vietnam) has large reserves and low prices. Its main component is fluorapatite. The purification and modification of apatite ore can produce a material that can be used as an absorbent for heavy metals with high efficiency. The molecular structure, phase component, specific surface area, element component, and morphology of modified apatite ore from Lao Cai province, Vietnam, were characterized by IR, XRD, BET, EDX, and SEM methods. The IR and XRD results show that the modified process transformed apatite ore from fluorapatite to nanohydroxyapatite. The specific surface area of modified apatite ore (100.79 m2/g) is much higher than the original ore (3.97 m2/g). The modified apatite ore was used to adsorb Cd2+ and Cu2+ ions in water. The effect of adsorbent mass, pH, contact time, and initial concentration of Cd2+ and Cu2+ on the adsorption efficiency and capacity was investigated. Besides, the isotherm adsorption model was determined using Freundlich and Langmuir theories.
Databáze: Directory of Open Access Journals
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