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- Title
Experimental study on the removal of diethyldithiocarbamate and COD from mineral processing chemicals by adsorption-ozone oxidation.
- Authors
SHEN Zifei; DENG Mi; WU Yong-ming; DENG Li-zhi; ZHOU Jia-yu; LI Fangfei
- Abstract
Ozone oxidation, activated carbon adsorption, and adsorption-ozone oxidation were used to treat diethyldithiocarbamate simulated wastewater. The results showed that for the removal of diethyldithiocarbamate and the corresponding COD, the ozone dosing ( below 3.00 g/h) was positively correlated with it, while the particle size of activated carbon was the opposite (the removal rate could reach 70.1% and 70.8% when ≥ 60 mesh, which were 40.2% and 41.5% higher than those corresponding to ≤ 20 mesh), while the pH value showed an insignificant effect. The initial concentration of diethyldithiocarbamate was 400 mg/L, the initial pH was 7.8, the ozone and activated carbon dosages were 3.00 g/h and 1.50 g/L, respectively, and the removal rate of diethyldithiocarbamate and COD by the adsorption-ozone oxidation method were 99.8% and 80.7%, respectively, when the reaction was carried out for 50 min, 29.7% and 9.9% higher than that of activated carbon treatment alone, of which COD removal rate was 31.2% higher than that of ozone treatment alone; overall, the removal effect of diethyldithiocarbamate showed adsorption-ozone oxidation > ozone oxidation > activated carbon adsorption, while the removal effect of COD showed adsorption-ozone oxidation > activated carbon adsorption > ozone oxidation. It can be seen that the adsorption-ozone oxidation method can achieve the effective simultaneous removal of diethyldithiocarbamate and COD.
- Subjects
CHEMICAL processes; DIETHYLDITHIOCARBAMATE; ACTIVATED carbon; MINERAL processing; OXIDATION; OZONE
- Publication
Applied Chemical Industry, 2023, Vol 52, Issue 2, p420
- ISSN
1671-3206
- Publication type
Article