Khả năng hấp phụ crom(III) bằng vật liệu compozit polyanilin-lignin

Nguyễn Ngọc Thanh, Bùi Thị Phương Thảo, Nguyễn Văn Hùng, Đường Khánh Linh, Dương Thị Huyền Hải, Nguyễn Thị Nga, Trần Thị Thanh Vân, Vũ Quốc Trung

Abstract


Polyaniline-lignin composite were prepared by polymerization of aniline in the presence of lignin using (NH4)2S2O8 as oxidant. Properties of the obtained polyaniline-lignin composite were studied by FT-IR spectra, thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). Results on absorption of Cr(III) by polyaniline-lignin composite showed the optimal absorption conditions of Cr(III) were pH of solution 5,0 and contact time of one hour. Absorption of Cr(III) followed the Langmuir model as evidenced by a good coefficient of correlation value (R2 = 0.9986). The maximum adsorption capacity, qmax from the Langmuir model was found to be 71.43 mg/g for Cr(III) and are higher than the separate polyaniline or lignin.

Keywords


Polyaniline, lignin, grafted copolymer, cromium absorption.

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