Inhibition and adsorption effect of plant carbon black on 9 aquatic pathogenic bacteria

doi:10.14088/j.cnki.issn0439-8114.2023.06.023

Abstract

Abstract: In order to verify the inhibition and adsorption effect of plant carbon black on common aquatic pathogens, the agar dilution method was used to determine the minimum inhibitory concentration of plant carbon black on 9 aquatic pathogens, and the test bacteria suspension was mixed with different amounts of plant carbon black to determine the adsorption rate, desorption rate and adsorption capacity. The results showed that the MIC value of plant carbon black to Vibrio alginolyticus and Vibrio harveyi were both 200 mg/mL, the MIC value to Edwardsiella tarda was 12.5 mg/mL, and the MIC value of the other 6 pathogenic bacteria were all 25 mg/mL. When the concentration of the tested bacteria was 10⁶CFU/mL, with the increasing of the amount of plant carbon black, the adsorption rate of the tested bacteria gradually increased, and finally it remained unchanged to 100%. And the desorption rate gradually decreased, and finally remained unchanged to 0. When the concentration of plant carbon black was 2 mg/mL, the adsorption rate of every test group could reach 100%, and the desorption rate was 0. At the same time, The adsorption capacity of carbon black on the tested bacteria gradually decreased. Therefore, it could be determined that plant carbon black had a good adsorption effect on common aquatic pathogens, and its inhibitory effect on freshwater pathogens was stronger than that of seawater pathogens.

Key words: plant carbon black, aquatic pathogens, inhibition, adsorption

CLC Number:

S965.117

CHEN Bin, LIN Yu, FAN Hai-ping, XUE Ling-zhan, YUAN Li-hua, ZHONG Quan-fu. Inhibition and adsorption effect of plant carbon black on 9 aquatic pathogenic bacteria[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(6): 125-128.

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