Use of fly ash agglomerates for removal of arsenic.

The aim of this work is to investigate the application of fly ash adsorbent for removal of arsenite ions from dilute solution (100-1,000 ppm). Experiments were carried out using material from the "Turów" (Poland) brown-coal-burning power plant, which was wetted, then mixed and tumbled in a granulator to form spherical agglomerates. Measurements of arsenic adsorption from aqueous solution were carried out at room temperature and natural pH of fly ash agglomerates, in either a shaken flask or circulating column, to compare two different methods of contacting solution with adsorbent. Adsorption isotherms of arsenic were determined for agglomerated material using the Freundlich equation. Kinetic studies indicated that sorption follows a pseudo-second-order model. Preferable method to carry out the process is continuous circulation of arsenite solution through a column.

[Iliac vessels malformations as a cause of gluteal varices]. / Malformacje naczyn biodrowych jako przyczyna zylaków posladków.

Gluteal varices are caused by different malformations (congenital or other disorders) within pelvic vessels. They are usually congenital, rarely acquired disorders. The rarity of incidence, diagnostic difficulties and sometimes ineffective methods of treatment made the authors of this article to present a case of 51-year-old patient with hemorrhoids with concomitant left gluteal varices caused by internal iliac artery-vein fistula.

[Metastasis to brain from rectal cancer as the first manifestation of neoplasmatic disease]. / Przerzut raka odbytnicy do osrodkowego ukladu nerwowego jako pierwszy objaw choroby nowotworowej.

Cerebral metastases from colorectal cancer are uncommon. They are usually a late manifestation of the neoplasmatic disease. The symptoms aren't always typical. We report the case of 52-year-old woman in whom the first manifestation of the disease was metastasis to brain.