Microcalorimetry and enzyme activity to determine the effect of nickel and sodium butyl xanthate on soil microbial community.

Author(s) Li, H.; Yao, J.; Gu, J.; Duran, R.; Roha, B.; Jordan, G.; Liu, J.; Min, N.; Lu, C.
Journal Ecotoxicol Environ Saf
Date Published 2018 Nov 15
Abstract

In non-ferrous metal tailings, combined pollution in the surrounding soil is caused by heavy metals and flotation chemicals. The combined effects of nickel (Ni) and its primary ore processing collector, sodium butyl xanthate (SBX), on soil microbial activity were investigated following the fluorescein diacetate hydrolase (FDA) and sucrase (SA) activities, and isothermal microcalorimetry during 60 days. FDA and SA activities as well as overall soil microbial activity were significantly affected by Ni, SBX and Ni/SBX mixture. The inhibition rate (I) of the growth rate constant (k) being higher with the Ni/SBX mixture than with SBX alone during the experiment. The growth rate constant (k) was positively correlated (p < 0.05 or p < 0.01) with enzyme activities (FDA and SA) indicating that k represented a valuable proxy to evaluate the toxic effect of metals and flotation reagents on soil microorganisms. Thus, microcalorimetry was a useful method to characterize soil microbial communities.

DOI 10.1016/j.ecoenv.2018.07.108
ISSN 1090-2414
Citation Li H, Yao J, Gu J, Duran R, Roha B, Jordan G, et al. Microcalorimetry and enzyme activity to determine the effect of nickel and sodium butyl xanthate on soil microbial community. Ecotoxicol Environ Saf. 2018;163:577-584.

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