MG复合材料的制备及其对甲基橙的吸附性能研究

doi:10.19964/j.issn.1006-4990.2024-0581

Abstract

Abstract:

The magnesium hydroxide/graphene oxide composites（MG） were prepared by direct precipitation method using self-made graphene oxide（GO） dispersion as solvent，magnesium sulfate heptahydrate as precursor，and ammonia as precipitant，and the composites were characterized by scanning electron microscopy with energy dispersive spectrometer（SEM-EDS），automatic specific surface and pore size analyzer（BET） and Fourier transform infrared spectrometer（FT-IR）.The experimental results showed that the specific surface area of MG products prepared by direct precipitation was 140.55 m²/g，which was larger than that of magnesium hydroxide（MH），and the open pores generated by MG flower-like structure were larger，and the Zeta potential of MG was 11.9 mV，which was conducive to the adsorption of methyl orange（MO） by MG.At the same time，the effects of MO wastewater concentration，reaction time and pH value on the MO adsorption performance were investigated，and the adsorption isotherm and adsorption kinetics of the MG adsorption process were analyzed.The adsorption experiments showed that when the pH was 7，the adsorbent dosage was 0.67 mg/mL，the adsorption time was 120 min，and the initial concentration of MO was 700 mg/L，the removal rate of MO was 97.63%，and the equilibrium adsorption capacity of MG reached 1 025.17 mg/g.The adsorption process was more in line with the quasi-first-order kinetic model，and the Langmuir model could better describe the adsorption process，and the maximum adsorption capacity was 1 297.16 mg/g.Therefore，the MG prepared in this paper could efficiently and rapidly adsorb and remove MO，and had certain potential in the treatment of printing and dyeing wastewater.

Key words: magnesium hydroxide, graphene oxide, adsorption, methyl orange

CLC Number:

TQ127.1

ZHANG Hanfei, SHEN Hongyan, LIU Youzhi. Study on preparation of MG composite material and its adsorption properties for methyl orange[J]. Inorganic Chemicals Industry, 2025, 57(6): 100-107.

Figures/Tables 14

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References 16

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吸附剂	w（GO）/％	Zeta电位/mV
MG	4.92	11.9
MH	0	8.8

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Inorganic Acid-Base-Salt Committee of CIESC

Study on preparation of MG composite material and its adsorption properties for methyl orange

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