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- W2075071119 abstract "Abstract Retention/leaching and bioremediation of n‐ hexadecane and naphthalene absorbed in building grade concrete were investigated. Retention studies showed that up to 20 mg of n‐ hexadecane were irreversibly absorbed per 1 g of concrete (not leached out by either water or aqueous solutions of surfactants). Bioremediation studies were conducted using three naturally occurring bacterial strains including Pseudomonas aeruginosa PG201 and soil microorganisms. Incubation of contaminated concrete pieces with bacterial suspension in shaking flasks resulted in the biodegradation/biotransformation of 8–19% of n‐ hexadecane or 28–35% of naphthalene, whereas neat hydrocarbons were completely degraded. Naphthalene removal was similar with and without bacteria, and only the destination of the labelled carbon was different. Direct application of biomass on contaminated concrete (“overlay procedure”) proved to be more efficient. Up to 70–80% of n‐ hexadecane and 20–55% of naphthalene (up to 80% combined with evaporation) were removed when using agar plates or filter paper with biomass. Overlay protocols using large amounts of water proved to be more efficient for the biological removal of naphthalene but detrimental for the removal of n‐ hexadecane. The latter was greater with low amounts of water. Evidence obtained shows that the hydrocarbon diffusion within the pores of concrete is the rate‐limiting step for bioremediation." @default.
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- W2075071119 date "2003-07-01" @default.
- W2075071119 modified "2023-09-28" @default.
- W2075071119 title "Bioremediation of Concrete Contaminated with <i>n</i>‐Hexadecane and Naphthalene" @default.
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- W2075071119 doi "https://doi.org/10.1002/abio.200390026" @default.
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