Prepration of Modified Fulvic Acid/Attapulgite Composites and Their Antimicrobial Properties

Abstract

Abstract: Fulvic acid (FA) has the effect of inhibiting bacteria, anti-inflammation, and promoting animal growth. In order to further improve the broad-spectrum antimicrobial properties of FA, a composite was prepared by loading FA into attapulgite (APT) through the adsorption method, meanwhile cetyltrimethylammonium bromide (CTAB) was used to modify the composite. The results show that FA and APT are mainly combined by electrostatic adsorption, and the introduction of CTAB regulates the charge of FA/APT composites. The minimum inhibitory concentration (MIC) of the composites against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) decreases with the increase of CTAB amount. When the amount of CTAB is 15% (mass fraction), the MIC is 1 mg/mL for E. coli and the MIC is 0.05 mg/mL for S. aureus.

Key words: fulvic acid, attapulgite, cetyl trimethyl ammonium bromide, composite material, broad-spectrum antimicrobial property

CLC Number:

R318.08

YANG Fangfang, ZHANG Qian, SONG Yameng, HUI Aiping, KANG Yuru, WANG Aiqin. Prepration of Modified Fulvic Acid/Attapulgite Composites and Their Antimicrobial Properties[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2777-2783.

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