Relationships of respiratory quotient to microbial biomass and hydrocarbon contaminant degradation during soil bioremediation

Response of soil microorganisms to radioactive oil waste: results from a leaching experiment

“…Soil microbial properties appear to be good indicators of soil pollution, as they are very responsive and provide information about the changes occurring in soil (Marin et al, 2005;Tejada et al, 2008). Soil microbial biomass and basic respiration are the two parameters that are traditionally used to estimate soil quality, particularly for soils polluted by hydrocarbons (Labud et al, 2007;Lee et al, 2008;Lamy et al, 2013). Another microbial parameter which can sensitively reflect the quality of soils is microbial enzymes, as they participate in the biological cycling of elements and the transformation of organic and mineral compounds (Marin et al, 2005).…”

Microbial activity of soil with sulfentrazone associated with phytoremediator species and inoculation with a bacterial consortium

“…The presence of herbicide in the soil, and particularly the cultivation of phytoremediator species, may support microbial growth and induce the release of increasing C-CO 2 over bio-remediation time, as observed in Figure 1a. The respiratory rate of the soil has been widely used in studies on waste decomposition and bio-remediation, associated with the quantification of the pollutant levels in the soil (Thirukkumaran and Parkinson 2000;Lamy et al 2013). The evolution of CO 2 in the soil, alone, does not allow consistent interpretations since a high respiratory rate may indicate an active and degrading population in an ecosystem with a high level of productivity as well as an ecological disorder or disturbance.…”

“…However, there is a relationship between the size of soil microbial biomass and herbicide degradation capacity and contaminants in this ecosystem (Voos and Groffman 1997;Lamy et al 2013). In the context of bioremediation, high and active microbial biomass associated with phytoremediator species C. ensiformis and H. annuus is of great interest because it may enhance the soil decontamination process with sulfentrazone.…”

Application of a modified OxiTop® respirometer for laboratory composting studies

“…The OxiTop ® system and its available options (WTW, Weiheim, Germany) has a wide range of applications in environmental engineering, including determination of a biological oxygen demand (BOD), oxygen uptake rate, soil respiration, biological decay, susceptibility of materials to biodegradation in aerobic and anaerobic conditions (Malińska and Richard 2006, Ahn et al 2008, Sadaka et al 2006, Zieliński et al 2013, Lamy et al 2013, Veeken et al 2003). There are also many examples of the OxiTop ® applications for composting studies, e.g.…”