Kinetic Modelling and Half-Life Study on Bioremediation of Soil Co-Contaminated with Lubricating Motor Oil and Lead Using Different Bioremediation Strategies

Biodegradation of Bitumen in Soil and Its Enhancement by Inorganic Fertilizer and Oxygen Release Compound: Experimental Analysis and Kinetic Modelling

“…Similar observations have been reported for the use of NPK fertilizer in the biodegradation of crude oil [16], petroleum hydrocarbon mixtures [17] and fuel oil, diesel and kerosene [12]. It has been reported that the addition of nitrogenous nutrient enhances biodegradation of hydrocarbon-polluted soil, presumably by removing the nitrogen limitation resulting from low natural level [40,42]. Figure 1b shows the degradation profile of bitumen in soil as a function of remediation time for 0.5 g and 1.0 g of hydrogen peroxide (oxygen release compound) amendment, respectively.…”

“…On the other hand, no reduction in TPH was observed in the control microcosm where the soil had been autoclaved three times at 121°C for 30 minutes each and HgCl treated (Figure 1a-1c). This observation indicates the role and importance of intrinsic or autochthonous microorganisms in the biodegradation process of organic contaminants present in the environment [40]. That is, the efficiency of bioremediation is a function of the microbial viability in the natural environment [46].…”

Evaluation of the effects of inorganic and organic fertilizers and activated carbon on bioremediation of soil contaminated with weathered crude oil

“…Bioremediation is an environmentally acceptable and cost-effective technology that exploits the diverse degradation abilities of microorganisms to efficiently convert complex chemical components of crude oil and other organic chemicals to harmless products by mineralization (Kao et al, 2008;Agarry et al, 2013a). Thus, there is the need to reduce the treatment time for bioremediation by accelerating the rate of degradation or recovery which could be referred to as enhanced bioremediation (Agarry et al, 2013a).…”

“…Thus, there is the need to reduce the treatment time for bioremediation by accelerating the rate of degradation or recovery which could be referred to as enhanced bioremediation (Agarry et al, 2013a). Enhanced bioremediation involves a wide variety of technologies (Chien et al, 2008) such as biosparging, biostimulation (which may involve the introduction of electron acceptors/electron donors into the ecosystem to stimulate autochthonous occurring microbial populations) and bioaugmentation (the addition of specific microorganisms) to enhance the biodegradation of the target contaminant or pollutant.…”

“…In this regard, bioremediation technologies have been developed for soils and water using the addition of nutrients and microbes (Greenwood et al, 2008). The use of nutrient supplements such as inorganic fertilizer (Margesin et al, 2007;Agarry et al, 2013a), organic fertilizer in terms of animal dungs (Agarry et al, 2013b) and agricultural crop residues (Abioye et al, 2009;Agarry et al, 2013b) to biostimulate degraders in polluted matrices has been extensively studied. Nonetheless, the search for cost effective and environmentally friendly methods of petroleum hydrocarbon removal from contaminated environment still needs to be further investigated.…”