title: A study on ruthenium-based catalysts for pharmaceutical wastewater treatment.
abstract: Ruthenium-based catalysts were prepared by a saturation-dip method. Their catalytic activity was evaluated by a catalytic wet oxidation (CWO) process. The ruthenium-based catalysts were used to purify organic pharmaceutical wastewater with high concentration pyridine and pyridine derivatives that have high chemical oxygen demand (COD). In the CWO process, organic pharmaceutical wastewater was continuously pumped into fixed-bed reactors filled with Ru-based catalysts, while the organic components in wastewater were catalytically degraded by oxygen at high temperatures and pressures (temperature, 170-300 degrees C; pressure, 1.0-10 MPa). The experimental results showed that the prepared catalysts could effectively purify pharmaceutical wastewater with high concentration organic components, which are difficult to degrade biochemically, and that the removal rates of both COD and total nitrogen were over 99%.
authors: Kunming Institute of Precious Metals, Kunming, Yunnan 650106, China. lei-yj@163.com
authors: Y J
authors: YJ
authors: Lei
authors: X B
authors: XB
authors: Wang
authors: C
authors: C
authors: Song
authors: F H
authors: FH
authors: Li
authors: X R
authors: XR
authors: Wang
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002384:Catalysis; D004345:Drug Industry; D009584:Nitrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D011725:Pyridines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D014877:Water Pollution, Chemical / Q000517:prevention & control; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D011725:Pyridines; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D012428:Ruthenium; D014025:Titanium; D009584:Nitrogen; D010100:Oxygen