ABSTRACT
This paper present the possible alternative options for the remove of trace elements from drinking water supplies in the trace. Arsenic and chromium are two of the most toxic pollutants, introduced into natural waters from a variety of sources and causing various adverse effects on living bodies. The performance of three filter bed methods was evaluated in the laboratory. Experiments were conducted to investigate the sorption of arsenic and chromium on carbon steel and removal of trace elements from drinking water with a household filtration process. The affinity of the arsenic and chromium species for Fe/Fe3C (iron/iron carbide) sites is the key factor controlling the removal of the elements. The method is based on the use of powdered block carbon, powder carbon steel and ceramic spheres in the ion-sorption columns as a cleaning process. The modified powdered block carbon is a satisfactory and economical sorbent for trace elements (arsenite and chromate) dissolved in water due to its low unit cost of about $23 and compatibility with the traditional household filtration system.
Subject(s)
Carbon/chemistry , Trace Elements/analysis , Water Pollutants/analysis , Water Purification/methods , Water/chemistry , Arsenic/analysis , Chromium/analysis , Environment , Environmental Monitoring , Hydrogen-Ion Concentration , Ions , Iron/chemistry , Microscopy, Electron, Scanning , Models, Chemical , ProtonsABSTRACT
Sludge incinerated ash has been fired at different temperatures. This material was fired at 1050 degrees C for 3 h and until a peak of 1010 degrees C. After thermal treatment the ash was screened at 200 mesh.The ash was characterized by X-ray fluorescence and trace elements like Cr, Pb, Zn, Cu, and some oxides like quartz(SiO2), Al2O3, P2O5, Fe2O3 were found. Scanning electron microscopy(SEM) has shown one change of particle between 2 microm at 90 microm and apparent porosity, thermal analysis has shown loss of mass and residual decomposition in the TG, DTG and DTA curves.