对闽江口水、间隙水与沉积物中的21种多氯联苯的进行调查研究,结果表明,闽江口水中多氯联苯的含量范围是0120-2147μgPL，间隙水中的含量为3119-10186μgPL，沉积物（干重）：15113-57193μgPkg；与其他河口、海域相比，闽江口的多氯联苯污染水平相对较为严重；间隙水的污染物浓度普遍要比其上覆水的浓度要高,而沉积物中的浓度比间隙水、表层水要高。水体中的多氯联苯主要部分为含3-6氯多氯联苯，多氯联苯的主要组分间的正相关性表明其具有相似、稳定的来源特征并且在环境中行为相关；对该河口的污染水平进行了初步的评价，其水质多氯联苯超过USEPA的标准，沉积物方面也部分超过参考评价标准。

Regard to the poor adsorbability of the fixing film photocatalyst, we prepared a new nanosized TiO2 thin film modified by carbon black acting as the pore-forming agent and baked by a kind of new method. The film was characterized by XRD, TEM, SEM, DRS and FT-IR techniques. The results showed that the prepared TiO2 films were mainly anatase structure, containing a little rutile. Their mean sizes of crystal grains are about 20-30 nm. Comparing to the ordinary TiO2 film, we found that both carbon black modification and new baking method could make the characteristics of films change, such as more pores, looser structure, smaller crystal grains and longer excitation wavelength. It should be owed to these advantaged characteristics that the photocatalytic activity of the new film was largely improved during the degradation of benzamide. Furthermore, it also had wonderful stability, keeping its activity for 4 months applied to degrade reactive brilliant red X-3B in the continuous flow reactor.

Producedwater from alkali/surfactant/polymer (ASP) floodingwas more difficult to treat than that fromwater flooding due to large quantities of residual chemicals (alkali, surfactant and polymer) in the produced water. Surfactant was mainly responsible for the stability of oil droplets, decreasing oil-water interfacial tension and zeta potential on the surface of the oil droplets. Flocculation and demulsification were conducted to remove the stable oil droplets in the produced water. Due to the large dose of the flocculants and some viscous sediment formed, flocculation was not suitable for the wastewater treatment. Demulsification was an effective method to accelerate oil-water separation for the produced water. Of the numerous demulsifiers screened, DODY68 was found to be the most effective in treating the wastewater. The zeta potential of oil droplets increased after addition of the demulsifier to the produced water from ASP flooding, which indicated that the approach and coalescence of small oil droplets became easier due to the decrease in electrostatic repulsion between oil droplets.

Polychlorinated diphenyl ethers (PCDEs) have received more and more concerns as acategory of potential persistent organic pollutants (POPs). Modeling it s environmental fate and expo sure a sse ssment require a number of fundamental physicochemical propertie s. However, the experimental data are currently limited due to the difficulty in analysis caused by the complexity of PCDE congeners. As an alternative, the quantitative structure property relationship (QSPR) approach could be used. In this paper, twelve kinds of molecular connectivity indice s (MCIs) of all 209 po ssible molecular structure patterns of PCDEs were calculated. Ba sed on 106 PCDEs with three observed physicochemical propertie s-vapour pre ssure (P0L), aqueous solubility (Sw) and noctanolPwater (Kow) and their MCIs data, a serie s of QSPR equations were e stablished using multiple linear regre ssion (MLR) method. As a re sult, three equations with be st performance were selected mainly from the view of high regre ssion coefficient (R) and low standard error (SE). All of them showed significant relationship and high accuracy. With the se equations the propertie s of other 103 patterns of PCDEs without the reported observed values were predicted. Furthermore, three partition propertie s for PCDE congeners-Henry’s Law constant s (H), partition coefficient s between ga sPwater (Kgw) and ga sPnoctanol (Kgo) were calculated according to the internal relationship among the se six propertie s. The se observed and predicted value s, in contra st with the criteria listed in the Stockholm treaty about POPs which ha s been signed by more than ninety countrie s in May 2001, illustrated that mo st of PCDEs congeners are potential persistent organic pollutants. As all descriptorsPpredictors are derived just from the molecular structure it self and without the import of any empirical parameters, this method is impersonal and promising for the estimation of physicochemical properties of PCDEs.

Persistent organic pollutants such as polycyclic aromatic hydrocarbons (PAHs) are of great concern due to their persistence, bioaccumulation and toxic effects.In this work the levels of 16 priority PAHs were determined in water, pore water, sediment, soil and vegetable samples from Minjiang River Estuary, China.T otal PAH concentrations varied from 9.9 to 474mgyl in water, 82.1 to 239mgyl in pore water, 112 to 877 ngyg dry wt.in surficial sediments, 128 to 465 ngyg dry wt.in soil and 8600 to 111 000 ngyg dry wt.in Chinese vegetables.Overall, the mean concentrations of PAHs were present in higher levels in pore water than that in surface water, due possibly to higher concentrations of dissolved organic carbon or colloids with which the hydrophobic pollutants were strongly associated. Such a concentration gradient implies a potential flux of pollutants from sediment pore water to overlying water. Contamination was dominated by high molecular mass PAH compounds in all samples, indicating combustion-derived sources (for example, pyrolysis at high temperature).The levels of PAHs in water and vegetable were relatively high in comparison to other studies, although PAHs in sediment and soil were comparable to those found in many other similar environments.The ratios of selected PAHs indicated again that PAHs in Minjiang River Estuary were mainly derived from incomplete combustion of fossil fuel.