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6034247 
Journal Article 
Ultrasonic Preparation of Activated Carbon Composites for Removal of Cr3+ and Zn2+ Ions from Aqueous Solution 
Al-Farhan, BS 
2015 
Journal of Environmental & Analytical Toxicology
ISSN: 2161-0525 
5 
4 
1 
In the present study melamine-formaldehyde-tetraoxalyl-ethylene diamine (MFT) covered activated carbon (MFT/AC) was prepared by the use of ultrasonic waves. The prepared materials were examined by Fourier transform infrared spectroscopy and scanning electron microscope. The results showed that MFT symmetrically covered the surface of the activated carbon. MFT/AC was examined for the removal of chromium and zinc ions from their aqueous solution in the presence and absence of ultrasonic waves. The effects of initial pH of the heavy metal solution, ultrasonic time and ultrasonic frequency on the efficiency of the removal were studied. The results showed that using ultrasonic waves of 210 KHz for 30 minutes sonication time showed higher removal efficiency towards Cr super( 3+) and Zn super( 2+) ions than unsonicated treatment. The removal of Cr super( 3+) ions was higher than that of Zn super( 2+) ions. The removal process was done via chelating with MFT in the prepared carbon composite. 
Aqualine Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Toxicology Abstracts; Ultrasonic waves; Carbon composites; Chelation; Cr3+ and Zn2+ ions; I.R. spectroscopy; Infrared spectroscopy; Sonication; Fourier transforms; Abiotic factors; pH effects; Adenylate cyclase; Toxicology; Activated Carbon; Carbon (activated); Scanning electron microscopy; Heavy metals; Ultrasonics; Chromium; Hydrogen Ion Concentration; X 24360:Metals