Removal of selected pharmaceuticals by chlorination, coagulation-sedimentation and powdered activated carbon treatment.

摘要: Removal property of nine pharmaceuticals (clofibric acid, diclofenac, fenoprofen, gemfibrozil, ibuprofen, indomethacin, ketoprofen, naproxen and propyphenazone) by chlorination, coagulation–sedimentation powdered activated carbon treatment was examined laboratory-scale experiments under the conditions close to actual drinking water processes. Indomethacin propyphenazone were completely degraded chlorination within 30 minutes, but others remained around 30% (naproxen diclofenac) or more than 80% initial concentration after 24 hours. A couple unidentified peaks in a chromatogram chlorinated samples suggested formation unknown by-products. Competitive adsorption observed when mixed solution target subjected batch test with carbon. Clofibric acid which relatively less hydrophobic among compounds, persisted 60% 3 hours contact time. performance would become lower due existence other competitive substances raw (e.g. natural organic matter). Coagulation–sedimentation using polyaluminium chloride hardly removed most even its optimal dose for turbidity removal. It is that part might persist course conventional treatments.