title: Reducing the bioavailability of PCBs in soil to plant by biochars assessed with triolein-embedded cellulose acetate membrane technique.
abstract: Coupling with triolein-embedded cellulose acetate membrane (TECAM) technique, hydroxypropyl β-cyclodextrins (HPCD) extraction method, and the greenhouse pot experiments, the influences of biochars on polychlorinated biphenyls (PCBs) bioavailability in soil to plant (Brassica chinensis L. and Daucus carota) were investigated. Addition of 2% biochars to soils significantly reduced the uptake of PCBs in plant, especially for di-, tri- and tetra-chlorobiphenyls. PCBs concentrations in the roots of B. chinensis and D. carota were reduced for 61.5-93.7%, and 12.7-62.4%, respectively in the presence of biochars. The kinetic study showed that in the soils amended with/without biochars, PCBs concentrations accumulated in TECAM, as well as in the HPCD extraction solution, followed significant linear relationships with those in plant roots. Application of biochars to soil is a potentially promising method to reduce PCBs bioavailability whereas TECAM technique can be a useful tool to predict the bioavailability of PCBs in soil.
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Yu-Jun
authors.initials: YJ
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Guo-Dong
authors.initials: GD
authors.lastname: Fang
authors.forename: Long
authors.initials: L
authors.lastname: Cang
authors.forename: H M S K
authors.initials: HM
authors.lastname: Herath
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Zhou
mesh_terms: D000073738:2-Hydroxypropyl-beta-cyclodextrin; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D010944:Plants / Q000378:metabolism*; D011078:Polychlorinated Biphenyls / Q000737:chemistry* / Q000378:metabolism; D012989:Soil Pollutants / Q000737:chemistry* / Q000378:metabolism; D014304:Triolein / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry
chemical_list: D012989:Soil Pollutants; D047392:beta-Cyclodextrins; C540010:biochar; D014304:Triolein; D002606:Charcoal; D000073738:2-Hydroxypropyl-beta-cyclodextrin; C005062:acetylcellulose; D002482:Cellulose; D011078:Polychlorinated Biphenyls