Effects of humic substances and soya lecithin on the aerobic bioremediation of a soil historically contaminated by polycyclic aromatic hydrocarbons (PAHs).


:The high hydrophobicity of polycyclic aromatic hydrocarbons (PAHs) strongly reduces their bioavailability in aged contaminated soils, thus limiting their bioremediation. The biodegradation of PAHs in soils can be enhanced by employing surface-active agents. However, chemical surfactants are often recalcitrant and exert toxic effects in the amended soils. The effects of two biogenic materials as pollutant-mobilizing agents on the aerobic bioremediation of an aged-contaminated soil were investigated here. A soil historically contaminated by about 13 g kg(-1) of a large variety of PAHs, was amended with soya lecithin (SL) or humic substances (HS) at 1.5% w/w and incubated in aerobic solid-phase and slurry-phase reactors for 150 days. A slow and only partial biodegradation of low-molecular weight PAHs, along with a moderate depletion of the initial soil ecotoxicity, was observed in the control reactors. The overall removal of PAHs in the presence of SL or HS was faster and more extensive and accompanied by a larger soil detoxification, especially under slurry-phase conditions. The SL and HS could be metabolized by soil aerobic microorganisms and enhanced the occurrence of both soil PAHs and indigenous aerobic PAH-degrading bacteria in the reactor water phase. These results indicate that SL and HS are biodegradable and efficiently enhance PAH bioavailability in soil. These natural surfactants significantly intensified the aerobic bioremediation of a historically PAH-contaminated soil under treatment conditions similar to those commonly employed in large-scale soil bioremediation.


Biotechnol Bioeng


Fava F,Berselli S,Conte P,Piccolo A,Marchetti L




Has Abstract


2004-10-20 00:00:00












  • Preparation of connexin43-integrated giant Liposomes by a baculovirus expression-liposome fusion method.

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Kamiya K,Tsumoto K,Arakawa S,Shimizu S,Morita I,Yoshimura T,Akiyoshi K

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  • Simulations of host-plasmid interactions in Escherichia coli: Copy number, promoter strength, and ribosome binding site strength effects on metabolic activity and plasmid gene expression.

    abstract::A mechanistically detailed single-cell model E. coli B/r-A was adapted to simulate the effects of vector presence on cell metabolism. Competition for RNA polymerase between chromosome and plasmid DNA is explicitly included. Distribution of active ribosomes among chromosome- and plasmid-derived messenger RNA, another k...

    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Peretti SW,Bailey JE

    更新日期:1987-02-01 00:00:00

  • Kinetics of milk coagulation: II. Kinetics of the secondary phase: micelle flocculation.

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Carlson A,Hill CG Jr,Olson NF

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Velander WH,Subramanian A,Madurawe RD,Orthner CL

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    journal_title:Biotechnology and bioengineering

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    authors: Zeng H,Yang A

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章,评审


    authors: Lima JF,Maia P,T Magalhães B,Cerqueira L,Azevedo NF

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Young CC,Rekha PD,Lai WA,Arun AB

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    journal_title:Biotechnology and bioengineering

    pub_type: 信件


    authors: Racine J,Cheradame H,Chu YS,Thiery JP,Rodriguez I

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Wiebe MG,Trinci AP

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    journal_title:Biotechnology and bioengineering

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    authors: Kwon S,Bosmans F,Kaas Q,Cheneval O,Conibear AC,Rosengren KJ,Wang CK,Schroeder CI,Craik DJ

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Mukherjea RN,Bhattacharya P,Ghosh BK,Taraphdar DK

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Tan HC,Poh CK,Cai Y,Soe MT,Wang W

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    pub_type: 杂志文章


    authors: Nie H,Soh BW,Fu YC,Wang CH

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    journal_title:Biotechnology and bioengineering

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    pub_type: 杂志文章


    authors: Colombié S,Tweddell RJ,Condoret JS,Marty A

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    pub_type: 杂志文章


    authors: Bernstein H,Yang VC,Langer R

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    authors: Guiraud JP,Bourgi J,Stervinou M,Claisse M,Galzy P

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    authors: Kornmann H,Rhiel M,Cannizzaro C,Marison I,von Stockar U

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    authors: Lin DQ,Brixius PJ,Hubbuch JJ,Thömmes J,Kula MR

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    authors: Ray NG,Vieth WR,Venkatasubramanian K

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    journal_title:Biotechnology and bioengineering

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    journal_title:Biotechnology and bioengineering

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    authors: Horn H,Reiff H,Morgenroth E

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Froelich S,Ziegler L,Stroup K,Wang P

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    pub_type: 杂志文章


    authors: Grabherr R,Nilsson E,Striedner G,Bayer K

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Saucedo VM,Karim MN

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    pub_type: 杂志文章


    authors: Gagnon M,Nagre S,Wang W,Coffman J,Hiller GW

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    journal_title:Biotechnology and bioengineering

    pub_type: 杂志文章


    authors: Vandamme D,Pontes SC,Goiris K,Foubert I,Pinoy LJ,Muylaert K

    更新日期:2011-10-01 00:00:00