Pillar[5]arene-based Polymer Network for Efficiently Removing Perfluorooctanoic Acid through Synergistic Binding Interactions.

Perfluorooctanoic acid (PFOA) is currently one of the most important chemicals posing environmental risks, and there is an urgent need to find methods to efficiently remove PFOA from environmental media. Here, two decaamino-pillar[5]arene-based fluorine-rich polymer networks, called FA2P-P and FA6P-P, were constructed using a convenient method. FA6P-P had an excellent ability to take up PFOA, and had a capacity of 1423 (mg PFOA) (g FA6P-P), which is the second highest adsorption capacity reported for any PFOA sorbent.

[Distribution Characteristics and Source Apportionment of n-Alkanes in Water from Yellow River in Henan Section].

To investigate the distributions and possible sources of n-alkanes in water and suspended particulate matter from Yellow River in Henan section, 26 water and suspended particulate matter samples were collected in August 2010 and 22 n-alkanes (C₁₄-C₃₆) were quantitatively determined by gas chromatography-mass spectrometer (GC-MS). Potential sources of n-alkanes were analyzed using different characteristic parameters. The results indicated that total concentrations of 22 n-alkanes were 521-5,843 ng · L⁻¹ with a mean concentration of 1,409 ng · L⁻¹, while the total amounts of n-alkanes in the suspended particulate matter were 463-11,142 ng · L⁻¹ with a mean value of 1,951 ng · L⁻¹.

[Distribution Characteristics and Ecological Risk Assessment of HCHs and DDTs in Surface Water Bodies in Xinxiang].

In order to investigate the distribution characteristics and ecological risk of HCHs and DDTs in the surface water of Xinxiang, 18 surface water samples were collected from from Xinxiang and the concentrations of HCHs and DDTs were determined. The ecological risk of HCHs and DDTs was evaluated using the overlapping areas of probability density function and safety threshold methods. The results showed that the levels of total HCHs (sum of 2 HCHs) and total DDTs (sum of DDTs) in 18 samples detected by GC-ECD ranged from 1.

Microwave-assisted preparation, characterization and photocatalytic properties of a dumbbell-shaped ZnO photocatalyst.

A novel dumbbell-shaped ZnO photocatalyst was successfully synthesized by microwave heating in the present study. The prepared ZnO photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis absorption spectrum (UV-Vis). The results indicated that the prepared ZnO photocatalyst shows a united dumbbell shape with 2 microm diameter and 5 microm length.

[Study on the grain-size distribution of polycyclic aromatic hydrocarbons in Yangtze River sediment].

Sediments collected from Yangtze River were separated into five size fractions ( > 200 microm, 200 - 125 microm, 125 - 63 microm, 63 - 25 microm, <25 microm) by wet sieving. The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) listed as U.S.