Removal of Cu2+ from wastewater using eco-hydroxyapatite synthesized from marble sludge

被引:4
作者
Peng, Sheng-Yuan [1 ]
Lin, Ya-Wen [2 ]
Lee, Wei-Hao [2 ]
Lin, Yan-Yu [1 ]
Hung, Ming-Jui [3 ]
Lin, Kae-Long [1 ]
机构
[1] Natl Ilan Univ, Dept Environm Engn, Yilan 260, Taiwan
[2] Natl Taipei Univ Technol, Inst Mineral Resources Engn, Taipei 106, Taiwan
[3] Ming Chi Univ Technol, Dept Safety Hlth & Environm Engn, New Taipei 243, Taiwan
关键词
Marble sludge; Hydrothermal synthesis; Hydroxyapatite; Adsorption; Isothermal adsorption model; IN-SITU SYNTHESIS; METHYLENE-BLUE; AQUEOUS-SOLUTIONS; COMPETITIVE ADSORPTION; MECHANICAL-PROPERTIES; CU(II); NANOCOMPOSITE; COPPER; NANOPARTICLES; NANOTUBES;
D O I
10.1016/j.matchemphys.2022.126854
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Rapid development brings environmental problems such as the discharge of industrial and agricultural waste-water. This study demonstrates the synthesis of eco-hydroxyapatite (eco-HAp) through the hydrothermal pro-cessing of marble sludge for the removal of Cu2+ from wastewater. FTIR analysis confirmed the existence of O-H and PO43- groups in eco-HAp samples. TEM analysis revealed the importance of Ca/P ratio on the shape and size of particles. Solid-state nuclear magnetic resonance (NMR) spectra revealed NMR H-1 representing a single crystal site of (OH) and P-31 representing the single crystal position of inorganic phosphorus (PO4). Eco-HAp samples presented Type IV N-2 adsorption-desorption isotherms with H-3 hysteresis loops, typical of HAp samples with a well-defined capillary step, which is indicative of mesoporous materials. Eco-HAp fabricated at a hy-drothermal temperature of 120 degrees C and Ca/P molar ratio of 1 presented high adsorption capacity of 256.25 mg/g. The correlation between the eco-HAp and the Langmuir adsorption isotherm model was 0.96-0.99. Eco-HAp with a large surface area is thus an excellent adsorbent for the treatment of wastewater containing Cu2+.
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页数:14
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