Toxic effects of chemicals on microorganisms

Feasibility study on the application of advanced oxidation technologies for decentralised wastewater treatment

“…AOTs are considered as an advanced technology for wastewater treatment, considering their reported high destruction efficiency for toxic pollutants that are usually resistant to conventional biological wastewater treatment processes (Laera et al, 2011). Previous studies have reported that the pollutants that are amenable to biological treatments can be oxidised by integrating a posttreatment AOT stage (Fedorak and Hrudey, 1984;Barreiro and Pratt, 1992;Reemtsma and Jekel, 1997). Although the mechanism of AOTs relies on the formation of OH .…”

Electrochemical oxidation of organic pollutants for the wastewater treatment: direct and indirect processes

“…Obviously, the methods based on chemical destruction, when properly developed, offer a complete solution to the problem of pollutant abatement, different from those in which only a phase separation is realized with the consequent problem of the final disposal. It has been frequently observed [28][29][30][31] that pollutants not amenable to biological treatments may also be characterized by high chemical stability and/or by a great reluctance to go to complete mineralization. Also, the adoption of these oxidation treatments requires that specific conditions must be considered during the process: the influence of pH, inhibition due to scavenger presence, light wasting, mass transfer limitations, direct ozone attack and appropriate equipment.…”

Mechanisms of membrane toxicity of hydrocarbons.

“…Parameters that were affected included growth, transport systems, CO 2 fixation in cyanobacteria, and gas production by anaerobic bacteria (234,272). Inhibition of growth and effects on bioluminescence, respiration, and methanogenesis have all been used to assess the toxicity of various environmental pollutants on microorganisms (16,39,113,158,301,335). Data on the toxic effects of xenobiotic compounds have been gathered and, together with knowledge of physicochemical characteristics of such compounds, can be used to predict the fate of pollutants in the environment.…”