The Broad Spectrum Inhibitory Effect Study of 3 Rare Earth Salts Used for Microbial Inoculant Additive

Abstract:

Three rare earth salts: La(NO₃)₃, LaCl₃ and Ce(NO₃)₃ were used to study their broad spectrum inhibitory effect on micro-organisms to look for an effective additive for microbial inoculant. YMA solid media containing different concentrations of RE ³⁺ (200, 400, 600, 800, 1000 mg L^-1) were exposed to air and been smeared soil solution, respectively, for contamination study. Results indicating that for air microbes, the inhibitory effect on microbe number of the 3 rare earths was Ce(NO₃)3 > LaCl₃ > La(NO₃)₃, and for soil microbes, it was La(NO₃)3 > Ce(NO3)3 > LaCl3. On the whole, microbe diameters decreased as RE ³⁺ concentration increase, except that mass microbes occurred in high density. Actinomycetes were the most sensitive microbes to RE3+ stress, which could be inhibited at low RE ³⁺ concentrations (200 and 400 mg L^-1), followed by bacteria and mould.

• Periodical: Applied Mechanics and Materials (Volume 310)
• Pages: 166-171
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.310.166
• Online since: February 2013
• Authors: Ping Hui Huo, Jian Feng Li, Shang Li Shi, Shu Qing Zhang, Li Yu Chen, Yang Yang Miao, Yu Ping Jia, Shu Ai Huang
• Keywords: Antimicrobial, Cerium Nitrate, Lanthanum Chloride, Lanthanum Nitrate

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