Accumulation of cobalt, zinc and manganese by the estuarine green microalga Chlorella salina immobilized in alginate microbeads

Article Abstract:

A University of Dundee research team investigated the plausibility of using immobilized microorganisms to remove metals and radionuclides from wastewater and other pollutants. Specifically, researchers analyzed biosorption and desorption rates of cobalt, zinc and manganese from calcium alginate microbeads. Experimental results indicated that biosorption rates were higher for immobilized cells than for free cells. Rates were also contingent upon cell density. Experimental procedures and results are described in detail.

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Effects of consecutive pulsing of an inhibitory substrate on biodegradation kinetics

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Texas A&M researchers conducted batch studies wherein they pulse fed an inhibitory substrate, phenol, to mimic the response of a sludge system to toxic chemicals. The studies identified Pseudomonas spp. and Klebsiella spp. as the primary microbial agents in biodegradation. The studies also showed a decline in substrate removal rates as phenol pulses increased, indicating a deactivation of bacterial cells. Experimental procedures and results are described in detail.

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Diones, sulfoxides, and sulfones from the aerobic cometabolism of methylbenzothiophenes by Pseudomonas strain BT1

Article Abstract:

Canadian and German researchers analyzed the microbial metabolism of organosulfur compounds present in crude oil and coal tars to assess the environmental effects of these substances. Researchers synthesized six methylbenzothiophenes and used them as substrates for a bacterial culture grown on 1-MN or glucose. Their object was to identify biotransformation products containing sulfur. Experimental procedures and results are described in detail.

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