Efficiency and mechanism of sorption of low concentration uranium in water by powdery aerobic activated sludge.

In this study, powdery aerobic activated sludge (PAAS) was first prepared, and the removal rate, sorption capacity and mechanism of sorption uranium on PAAS was investigated. Before and after sorption, the surface morphology and structure of PAAS were characterized systematically using the Fourier transform infrared spectrometer (FTIR), the X-ray photoelectron spectrometer (XPS), and the scanning electron microscope (SEM-EDX). In this work, the sorption mechanism and efficiency of uranium on the PAAS was study with static batch and ion exchange experiments, meanwhile, some influencing factors such as solution pH, contact temperature, adsorbent dose of PAAS and different initial uranium concentrations were studied.

Efficiency and mechanism of adsorption of low concentration uranium in water by extracellular polymeric substances.

Extracellular polymeric substances (EPS) of uranium adsorbent was first extracted from the aerobic activated sludge of municipal wastewater treatment plant as raw material. The structure and surface morphology of EPS was characterized by FTIR, SEM-EDX, 3D-EEM, and XPS. The 3D-EEM spectra of EPS revealed that there are Tryptophan-like protein and Humus which can adsorb uranium in the EPS.

[Comparison between primary anastomosis after intraoperative colonic defecation and Hartmann procedure in patients with obstructive left colon cancer].

Objective: To compare primary anastomosis after intraoperative colonic defecation and Hartmann procedure for obstructive left colon cancer.

Methods: Clinical data of 68 patients who underwent emergent laparotomy for left colon cancer with acute bowel obstruction between January 2000 and January 2008 were analyzed retrospectively.

Results: Primary resection and anastomosis with intraoperative defecation was performed in 43 patients and Hartmann's procedure in 25 cases.

Radiofrequency ablation combined with transarterial chemoembolization for unresectable primary liver cancer.

Background: Radiofrequency ablation (RFA) followed by transarterial chemoembolization (TACE) for unresectable primary liver cancer (PLC) has not been widely discussed. In this study, the outcome of the combination of RFA with TACE was retrospectively evaluated.

Methods: From May 2003 to March 2008, 127 consecutive PLC patients with a median age of 56.

[A 10-year-review (1998 - 2007) on 3449 cases of osteoporotic hip fractures: trend of hospitalization and inpatient costs].

Objective: The purpose of this retrospective research was to analyze the trend of hospitalized prevalence in the past 10 years (1998 - 2007) and to estimate resource utilization associated with osteoporotic hip fractures, including hospital length of stay and inpatient costs in Guangzhou, China.

Methods: 3449 patients aged 50 years and older, hospitalized for primary diagnose of hip fractures in both hospitals in the past ten years were included in our study. Completed data was obtained retrospectively from the hospital medical records.