Choi Keun-Joo, Kim Sang-Goo, Kim Seung-Hyun
Water Quality Research Institute, Busan Water Authority, South Korea.
J Hazard Mater. 2008 Feb 28;151(1):38-43. doi: 10.1016/j.jhazmat.2007.05.059. Epub 2007 May 26.
Treatment of seven tetracycline classes of antibiotic (TAs) from raw waters (synthetic and river) was evaluated using coagulation and granular activated carbon (GAC) filtration in this study. Both coagulation and GAC filtration were effective for removal of TAs, and the removal efficiency depended on the type of TAs. GAC filtration was relatively more effective for removal of tetracycline (TC), doxycycline-hyclate (DXC), and chlortetracycline-HCl (CTC), which were difficult to remove by coagulation. It was speculated that TAs would be removed through the charge neutralization and sweep coagulation when poly-aluminum chloride (PACl) was added into the raw waters. The charge neutralization of zwitterionic or negative TAs by cationic Al (III) species drove removal of TAs from the synthetic water. When sufficient alkalinity was available (river water), aluminum hydroxide precipitates were formed. TAs could be removed by being enmeshed into or adsorbed onto the precipitates when PACl was added to the river water.
本研究采用混凝和颗粒活性炭（GAC）过滤法评估了原水（合成水和河水）中七类四环素类抗生素（TAs）的处理效果。混凝和GAC过滤对TAs的去除均有效，去除效率取决于TAs的类型。GAC过滤对四环素（TC）、盐酸多西环素（DXC）和盐酸金霉素（CTC）的去除相对更有效，而这些物质难以通过混凝去除。据推测，当向原水中添加聚合氯化铝（PACl）时，TAs将通过电荷中和及卷扫混凝作用被去除。阳离子Al（III）物种对两性离子或负电荷TAs的电荷中和作用促使TAs从合成水中被去除。当有足够碱度时（河水），会形成氢氧化铝沉淀。当向河水中添加PACl时，TAs可通过被截留在沉淀中或吸附在沉淀上而被去除。
