[Sediment record of DDTs in sediment core from Hongfeng reservoir].

In order to reconstruct the chronology of 2,2-his (4-Chlorophenyl)-1,1,1-trichloroethane (DDT) input into the Hongfeng reservoir and assess the pollution issues, the temporal distribution of DDT in sediment core from Hongfeng reservoir was measured using GC/MS method, and the possible sources and potential risk assessment also had been identified. The DDTs (sum of p,p'- and o,p'-DDT, DDE and DDD) in sediment core were ranged from 7.6 to 23.

Screening level of PAHs in sediment core from Lake Hongfeng, Southwest China.

Using data from a 25-year retrospective of polycyclic aromatic hydrocarbons (PAHs) in sediment core from Lake Hongfeng, Southwest China, their possible sources and potential toxicologic significance were investigated. The total PAH concentrations (16 priority PAHs as proposed by the United States Environmental Protection Agency) in sediments ranged from 2936.1 to 5282.

[Temporal distribution, sources, and risk assessment of polycyclic aromatic hydrocarbons in sediment core from Miyun reservoir].

The temporal distribution of polycyclic aromatic hydrocarbons (PAHs) was measured in sediment core from Miyun reservoir, and the possible sources and the potential risk assessment also have been identified. The aim of the present work is to understand the temporal trend of PAHs in Miyun reservoir recently. The concentrations of sigma PAH16 in sediment ranged from 618.

[Characteristics of organic matter in different extractions of phosphorus forms in sediments in north part of Taihu Lake].

The characteristics of organic matter in different extractions of phosphorus forms in the surface sediments (0-10 cm) from three different regions of north part of Taihu Lake were investigated using the combination of high-performance size-exclusion chromatography (HPSEC), three-dimensional excitation/emission matrix (3DEEM) fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR) and elemental analysis, and the relationship between organic matter and phosphorus was also discussed. The results show that the concentrations of total phosphorus in sediments coincide with the corresponding trophic level of overlying water. The atomic ratios of C/N (8.