Preparation of polyester nonwovens supported CaAlg/CaSiO3@SiO2 and its adsorption for Pb2+

MA Kai-xin; LIU Qi; BAI Tian; LU Zi-jie; YU Li-nan; MO Chen; ZHAO Kong-yin; LIU Ya

doi:10.11868/j.issn.1001-4381.2019.001024

Cailiao gongcheng (Sep 2020)

Preparation of polyester nonwovens supported CaAlg/CaSiO3@SiO2 and its adsorption for Pb2+

MA Kai-xin,
LIU Qi,
BAI Tian,
LU Zi-jie,
YU Li-nan,
MO Chen,
ZHAO Kong-yin,
LIU Ya

Affiliations

MA Kai-xin: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
LIU Qi: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
BAI Tian: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
LU Zi-jie: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
YU Li-nan: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
MO Chen: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
ZHAO Kong-yin: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
LIU Ya: School of Textile Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China

DOI: https://doi.org/10.11868/j.issn.1001-4381.2019.001024
Journal volume & issue: Vol. 48, no. 9
pp. 86 – 92

Abstract

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Calcium silicate/calcium alginate (PET-s-CaAlg/CaSiO3@SiO2) composites supported by polyethylene terephthalate fibers were prepared by chemical crosslinking. The PET-s-CaAlg/CaSiO3@SiO2 was characterized by optical microscope, Scanning Electron Microscopy (SEM), Fourier Transform infrared spectroscopy (FTIR) and BET.As can be seen in SEM, mesoporous SiO2 with the size of 150-200 nm appears on the surface of the material. FTIR shows that Si-OH structure has been formed on the surface of PET non-woven fabric.BET analysis showed that the specific surface area of the material increases significantly. The factors affecting the adsorption properties of Pb2+ were simultaneously discussed, such as the initial Pb2+ concentration, adsorption contact time, temperature and pH value. The results show excellent adsorption properties of PET-s-CaAlg/CaSiO3@SiO2for Pb2+ is obtained and the saturated adsorption amount is 58.33 mg/g. Its adsorption kinetics for Pb2+ is in accordance with the quasi second-order kinetic model. Low temperature is conducive to adsorption. The adsorption capacities of Pb2+on PET-s-CaAlg/CaSiO3@SiO2are affected by the pH of the solution through the ionization of surface functional groups and the degree of hydrolysis of Pb2+. It shows that the best adsorption capacities of Pb2+ is at the pH of 4.0-6.0.

Published in Cailiao gongcheng

ISSN: 1001-4381 (Print)
Publisher: Journal of Materials Engineering
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: http://jme.biam.ac.cn/CN/1001-4381/home.shtml

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