Tetracycline (TC) is one of the most important antibiotics, and is ranked as the second in the production in the world. A series of researches show that it is widely distributed in various waste streams. A survey on wastewater treatment plants in Wisconsindemonstrated that the tetracycline was the most frequently detected antibiotic; it existed in 80% of the wastewater influent and effluent samples [1]. Another survey on the treated effluents from eight wastewater treatment plants in Canada showed that the tetracycline was frequently detected with a maximum concentration of 0.977 lg L1 [2]. The tetracycline was found in both surface water and groundwater [3,4].