Bioremediation of petroleum hydrocarbons in soil column lysimeters from Kwajalein Island

Abstract

Soil column studies were used to evaluate petroleum hydrocarbon (PHC) remediation in soils from Kwajalein Atoll. Treatments included controls, and combinations of water, air, nutrients, and bioaugmentation with indigenous microbes (W, A, N, and M, respectively). Microbial colony forming units (CFU) decreased in the control columns and in treatments without air. Treatments including W+A+N and W+A+N+ exhibited increased CFU. One third of the PHC was removed by water and another third was removed by W+A+N and W+A+N+M treatments. Bioaugmentation with indigenous PHC degraders did not enhance bioremediation. Potential for bioremediation was demonstrated by air, water, and nutrient amendments.

Natural attenuation of diesel fuel in heavy clay soil

“…Studies described in the literature (Smarkel 1990;Phelps et al 1994;Srivastava et al 1994;Hueseman 1995) have generally employed the total extractable organic analysis to demonstrate diesel (or general hydrocarbon) disappearance. This method is well established and widely accessible but can become costly if numerous samples must be analysed.…”

Pesticide relevance and their microbial degradation: a-state-of-art

“…The bioaugmentation (introduction of specific competent microorganisms) has been well thought-out a valuable tool for increasing the rate and extent of biodegradation of pesticide pollution (Coppotelli et al 2008). The combined inoculation of competent and indigenous microbes directly isolated from the same soil is often called as bioaugumentation (Phelps et al 1994;Otte et al 1994). Many studies have shown that biotic and abiotic environmental factors influence the effectiveness of bioaugmentation (Mrozi and PiotrowskaSege 2010).…”

Effect of toluene as gaseous cosubstrate in bioremediation of hydrocarbon-polluted soil

“…Duplicate columns were used for all experiments. The mineral medium contained (in g l −1 ) 0.6 KH 2 PO 4 ; 2.4 K 2 HPO 4 ; 4 . The ratio C:N in the columns were 260:1 for Soil A and 340:1 for Soil B, these values are in the ranges used in some hydrocarbon-polluted soil bioremediation treatments [20].…”

“…Hydrocarbon biodegradation is enhanced by some microbial properties such as the production of natural surfactants and the hydrophobic composition of its cellular wall [3]. The microbial activity for crude-oil degradation has been documented [4,5].…”