Original Articles: 2014 Vol: 6 Issue: 6
Study on removal of chromium from aqueous solution using dry cow dung powder
The high toxicity levels and increased amount of chromium has severely caused various environment and public health problems, whose treatment is expensive. Thus, it is very important to find economical and conventional ways for treating these high levels of heavy metals like chromium. This was done by using dried cow dung powder and the uptake percentage was determined at different pH, time and initial concentration of chromium by using Atomic Absorption Spectroscopy (AAS). It was found that amount of chromium removed decreases from 73.884 % at pH 1 to 63.474 % at ph 11, thus suggesting that amount removed is inversely proportional to pH. The adsorption effect follows the Langmuir model of adsorption isotherm since adsorption is found to be directly proportional to time. Also, it was found that with increase in the initial concentration of chromium, amount of removal has been found to increase while the % removal remains constant at constant pH conditions.