(1. 东北大学 资源与土木工程学院，沈阳 110004；
2. 河北理工大学 资源与环境学院，唐山 063009)
摘 要:
关键字: 电镀废水；镉；水洗废啤酒酵母；生物吸附；沉降
（1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China;
2. College of Resource and Environment, Hebei Polytechnic University, Tangshan 063009,China）
Abstract:The adsorption regular of water-washing waste saccharomyces cerevisiae on cadmium in the wastewater of electroplating factory and sedimentation effect were studied by adsorption-sedimentation method using water-washing waste saccharomyces cerevisiae as adsorbent. The experimental results show that the adsorption rate and removing rate of cadmium are both above 96% under conditions with cadmium concentration in cadmium-containing electroplating wastewater about 26 mg/L, pH of 7.0, the dosage of water-washing waste saccharomyces cerevisiae of 40 g/L (about 72% water) at 18 ℃, the stiring revolution of 800 r/min, adsorption for 30 min and natural sedimentation for 3.5 h. The adsorption mechanism of water-washing waste saccharomyces cerevisiae to cadmium is analysized by TEM, Zeta potential and infrared spectroscopy of the cells. The results show that adsorbing effect occurs on the surface and inside of water-washing waste saccharomyces cerevisiae. The chemistry chelating, electrostatic force, hydrogen bonding and so on all fountion in the adsorption process.
Key words: electroplating wastewater; cadmium; water-washing waste saccharomyces cerevisiae; biosorption; sedimentation
