The status of organic pollution in groundwater in eastern China along the Grand Canal from Hangzhou to Beijing was evaluated. Forty-two semi-volatile organic contaminants were analyzed, including 16 polycyclic aromatic hydrocarbons (PAHs), seven polychlorinated biphenyls (PCBs), 12 organochlorine pesticides (OCPs) and seven organophosphorus pesticides (OPPs). Among the detected contaminants, PA...

A phenanthrene-degrading endophytic bacterium, Pn2, was isolated from Alopecurus aequalis Sobol grown in soils contaminated with polycyclic aromatic hydrocarbons (PAHs). Based on morphology, physiological characteristics and the 16S rRNA gene sequence, it was identified as Massilia sp. Strain Pn2 could degrade more than 95% of the phenanthrene (150 mg · L(-1)) in a minimal salts medium (MSM) wi...

Ultrastructural alterations of columnar respiratory epithe lium were produced by certain polycyclic aromatic hydrocar bons in suckling rat trachea maintained in organ culture for 11 days. The potent carcinogens 7,12-dimethylbenz(a)anthracene (DMBA) and benzo(a)pyrene and the weakly carci nogenic compounds benz(a)anthracene and 5-fluoro-7,12-dimethylbenz(a)anthracene (F-DMBA) produced cells whos...

An experiment has been performed to determine the activity of arylsulphatase in soil submitted to pressure of four polycyclic aromatic hydrocarbons: naphthalene, phenanthrene, anthracene, and pyrene, in the amount of: 0, 1,000, 2,000, and 4,000 mg kg-1 dm of soil. Soil samples were also applied some organic substances, such as: cellulose, sucrose, and compost, in the amount of 0 and 9 g kg-1 dm...

In a previous communication (1) it was shown that the rat forms some mercapturic acid from simultaneously administered radioactive i@-cystine and bromobenzene. The major portion of the excreted mercapturic acid was derived from un labeled tissue sulfur compounds. On the other hand, no evidence could be found for the excretion of a labeled conjugate from 3,4-benzpyrene and L-cystine. In addition...

First-principles gradient-corrected density functional theory electronic structure calculations of the haptotropic rearrangement of a Cr(CO)(3) unit on naphthalene and phenanthrene derivatives are reported. Coupled-cluster calibration studies of Cr(CO)(3) complexes with benzene and naphthalene derivatives confirm the accuracy of the applied Becke exchange and Perdew correlation functionals. Cha...

The biodegradation of polycyclic aromatic hydrocarbons (PAH) often is limited by low water solubility and dissolution rate. Nonionic surfactants and sodium dodecyl sulfate increased the concentration of PAH in the water phase because of solubilization. The degradation of PAH was inhibited by sodium dodecyl sulfate because this surfactant was preferred as a growth substrate. Growth of mixed cult...

The bacteria involved in organic pollutant degradation in pelagic deep-sea environments are largely unknown. In this report, the diversity of polycyclic aromatic hydrocarbon (PAH)-degrading bacteria was analyzed in deep-sea water on the Southwest Indian Ridge (SWIR). After enrichment with a PAH mixture (phenanthrene, anthracene, fluoranthene, and pyrene), nine bacterial consortia were obtained ...

Degradation of polycyclic aromatic hydrocarbons (PAH) such as phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]anthracene, chryzene, benzo[b]fluoranthene, benzo[e]pyrene, benzo[k]fluoranthene and benzo[a]pyrene) in the surface layer (5 cm) of soil polluted with aircraft fuel in an amount of 10 ml/kg was analyzed. The direct influence of solubility in water on the degree of its loss was p...