Soybean [Glycine max (L.) Merr.] stalk-based biochar was prepared using oxygen-limited pyrolysis. We evaluated phenanthrene (PHE) and Hg(II) sorption, from single binary component solutions, onto biochar. found that the efficiently removed PHE aqueous solutions. The isotherms for sorption could be described linear Tóth models, respectively, both with high regression coefficients (R(2) > 0.995). When coexisted in an solution, we observed direct competitive each one suppressing another. Our...

The gradients of root exudates and persistent organic pollutants, including polycyclic aromatic hydrocarbons (PAHs), in rhizosphere soil proximity to the surface are still not well elucidated. In this work, a greenhouse experiment was conducted investigate distribution phenanthrene pyrene, as selected PAHs, close (0–8 mm) ryegrass (Lolium multiflorum Lam.) host plant. Rhizosphere from divided into three layers: rhizoplane strongly loosely adhering soil. Root were characterized soluble C,...

Endophytic bacteria can promote plant growth, induce defence mechanisms, and increase resistance to organic contaminants. The aims of the present study were isolate highly PAH-degrading endophytic from plants growing at PAH-contaminated sites evaluate capabilities these degrade polycyclic aromatic hydrocarbons (PAHs) in vitro, which will be beneficial for re-colonizing target reducing PAH residues through inoculation with bacteria. Two bacterial strains P1 (Stenotrophomonas sp.) P3...

The impact of low‐molecular‐weight organic acids (LMWOAs) on the sorption–desorption phenanthrene, used as a representative polycyclic aromatic hydrocarbons, was investigated with laboratory batch technique. Experiments were conducted three types soil samples containing various components: citric, oxalic, and malic acids. sorption phenanthrene by soils could be well described linear‐type model irrespective addition LMWOAs. simulated distribution constant ( K d ) C‐normalized oc for decreased...

Persistent organic pollutants (POPs) accumulation in plants poses a risk to human health. POPs can be transported through soil and air by abiotic or biotic processes. Their transport mechanisms include symplastic apoplastic processes, depending on the POP physicochemical properties vegetation species growth stage. with higher log octanol–water partition coefficient ( K ow ) values were absorbed more easily than those lower values. Specific endophytic bacteria showed increased expression of...

To investigate the interaction between organic pollutants and soil microorganisms, industrial soils were collected from Pearl River Delta region of China for determining semi-volatile pollutants, community structure activity microorganisms. The results showed that polycyclic aromatic hydrocarbons (PAHs) (63.3-4956 μg kg-1) phthalate esters (PAEs) (272-65,837 main in research area soils. Chemical manufacturing industry plastics contributed greatly to PAH pollution PAE pollution, respectively....

Soybean [ (L.) Merr.] stalk-based carbons were prepared by phosphoric acid activation at different carbonization temperatures. Characteristics of the carbon, including specific surface area, iodine number, and amount methylene blue sorption, determined. Experiments on phenanthrene, naphthalene, acenaphthene, as representatives polycyclic aromatic hydrocarbons (PAHs), removal from aqueous solution carbon conducted levels addition. The results indicated that sorption increased with an increase...

A 17β-estradiol (E2)-degrading bacterium E2S was isolated from the activated sludge in a sewage treatment plant (STP). The morphology, biological characteristics, and 16S ribosomal RNA (rRNA) gene sequence of strain indicated that it belonged to genus Novosphingobium. optimal degrading conditions were 30 °C pH 7.0. ideal inoculum volume 5% (v/v), 20-mL degradation system sufficient support removal ability E2S. addition extra NaCl did not benefit E2 batch culture by this strain. Strain...

Endophytes are ubiquitous in plants, and they may have a natural capacity to biodegrade polycyclic aromatic hydrocarbons (PAHs). In our study, phenanthrene-degrading endophytic Paenibacillus sp. PHE-3 was isolated from P. asiatica L. grown PAH-contaminated site. The effects of environmental variables on phenanthrene biodegradation by strain were studied, the ability use high molecular weight PAH (HMW-PAH) as sole carbon source also evaluated. Our results indicated that pH value 4.0–8.0,...

Understanding the phytoavailability and rhizospheric distribution of bound residues (reference to parent compounds) polycyclic aromatic hydrocarbons (PAHs) in soils is crucial importance for risk assessment PAH-contaminated sites. This study investigated gradient phenanthrene pyrene as representative PAHs soils. Although available fractions were removed, clear uptake, accumulation, translocation by ryegrass (Lolium multiflorum Lam.) indicated a significant bound-PAH Rhizosphere soil from...

This study provides new insights into the dynamics of bacterial community structure during phytoremediation. The communities cultivable autochthonous endophytic bacteria in ryegrass exposed to polycyclic aromatic hydrocarbons (PAHs) were investigated with regard their potential biodegrade PAHs. Bacterial counts and 16S rRNA gene sequence used microbiological evaluation. A total 33 strains isolated from plants, which represented 15 different genera eight classes, respectively. Moreover, PAH...

This research was conducted to find an optimal inoculation way for a pyrene-degrading endophytic Serratia sp. PW7 colonize wheat reducing pyrene contamination. Three ways, which are soaking seeds in inocula (TS), dipping roots of seedlings (TR), and spraying on leaves (TL), were used this study. Inoculated noninoculated (CK) were, respectively, cultivated Hoagland solutions supplemented with growth chamber. The results showed that strain successfully colonized the inoculated high numbers,...