[Soil-crop Distribution and Health Risk Assessment of Organochlorine Pesticides on Typical Agricultural Land in Southern Leizhou Peninsula].

The residual content of organochlorine pesticides (OCPs) in soil and crops of typical agricultural land in the southern Leizhou peninsula were determined using gas chromatography-mass spectrometry (GC-MS). Additionally, the bioconcentration factors of organochlorine pesticides in eight crops were investigated, and the human health risk was evaluated. The results indicated that 10 types of OCPs were detected to varying degrees; HCHs and heptachlor were the main OCPs in the study area, with the residual contents of 23.

[Pollution Characteristics and Ecological Risk Assessment of Organochlorine Pesticides in Water Source Areas of Guangdong and Guangxi].

The concentrations of 16 organochlorine pesticides (OCPs) in 7 water samples collected from different sites of water source areas of Guangdong and Guangxi were detected by SPE-GC-MS, and then the pollution characteristics were analyzed. This study established species sensitivity distribution(SSD) curves with BurrⅢ distribution model. In the meantime, HC values were calculated by BurrliOZ software, which were used to evaluate the toxicity effects of OCPs towards aquatic organisms.

[Distribution characteristics of polycyclic aromatic hydrocarbons and black carbon in road dusts from typical cities of China and India].

In order to investigate the distribution characteristics of polycyclic aromatic hydrocarbons (PAHs) and black carbon (BC) in road dusts in typical cities of Beijing, Shanghai, Guangzhou and Wuhan in China and Kolcata in India, samples were collected in urban roads during Dec., 2007 to Feb., 2009.

[Characterization of polycyclic aromatic hydrocarbons contaminations in surface sediments from Zhalong wetland, China].

Soxhlet extraction, silica gel alumina column for separation and clean up and gas chromatography-mass spectrometer (GC-MS) for qualitative and quantitative analysis were used for study environmental behavior of 15 priority PAHs of twelve surface sediment samples collected from Zhalong wetland, Heilongjiang Province. The objectives of this study were to identify the PAHs contamination level, composition pattern, pollution sources and pathways, and to assess the ecological risk of PAHs to aquatic life in Zhalong wetland. The total concentrations of 15 priority PAHs ranged form 31.