Rapid decolorization and mineralization of simulated textile wastewater in a heterogeneous Fenton like system with/without external energy.
A novel Fenton like system, employing Zero Valent Iron (ZVI) and air bubbling, was developed to treat a simulated textile wastewater containing azo dye Reactive Black 5 (RB5) and Ethylenediaminetetraacetic acid (EDTA). By dioxygen activation, H(2)O(2) was self-produced continuously in the system through a series of iron-EDTA ligands reactions. After 3h reaction, the removal rates of RB5, EDTA, Total Organic Carbon (TOC), and Chemical Oxygen Demand (COD) were 100%, 96.5%, 68.6% and 92.2%, respectively. The effects of pH, atmosphere as well as the initial concentration of RB5, EDTA and ZVI were also investigated. Two types of external energy-Ultrasound (US) and Ultraviolet (UV) were introduced into the Fenton like system, respectively. The effect of these external energies on the degradation of the wastewater was assessed. It was demonstrated that US presented significant synergistic effect on the degradation and mineralization of both RB5 and EDTA, while UV could not achieve any improvement.
Zhou
Tao
T
Environmental Science Research Institute, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
Lu
Xiaohua
X
Wang
Jia
J
Wong
Fook-Sin
FS
Li
Yaozhong
Y
D002244:Carbon / Q000032:analysis; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D004492:Edetic Acid / Q000737:chemistry* / Q000528:radiation effects; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007501:Iron; D009282:Naphthalenesulfonates / Q000737:chemistry* / Q000528:radiation effects; D010100:Oxygen / Q000032:analysis; D013784:Textiles; D014465:Ultrasonics; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; C045076:Fenton's reagent; D007220:Industrial Waste; D009282:Naphthalenesulfonates; D014874:Water Pollutants, Chemical; D002244:Carbon; D004492:Edetic Acid; D006861:Hydrogen Peroxide; D007501:Iron; C063421:Remazol black B; D010100:Oxygen