Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4401545 | Procedia Environmental Sciences | 2016 | 8 Pages |
By selecting varieties of factors, designing experiment in groups and other methods, the cleaning and detoxification of chromium in construction† waste has been studied. Experimental results show that: When particle diameter is larger than 1 cm, chromium and content are volatile in waste. On the opposite, the effect of particle size on the detoxification of waste is not significantly when it is smaller than 1 cm. In addition, the type and concentration of detergent have a great influence on cleaning and detoxifying. Detoxification effects on chromium of citric acid (0.1 mol/L, 0.5 mol/L) and concentration hydrochloric acid (0.5 mol/L, 1 mol/L) are very efficient, and removal rate is up to 90%. Citric acid, oxalic acid, concentrated hydrochloric acid, and concentrated acetic acid have the best effect on Cr6+ removal works. Removal rate is more than 99%.