剩余污泥与人造沸石复合体系去除废水中的钙离子  

Removal of calcium ion from wastewater using waste activated sludge and artificial zeolites

作　　者：袁林[1] 柴立元[1] 闵小波[1] 王云燕[1] 舒余德[1] 周敏[1] 方艳[1] 王璞[1] 常皓[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2007年第5期825-829,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50508044);湖南省科技计划攻关重大专项(05SK1003-1)

摘　　要：采用剩余污泥与人造沸石复合体系去除废水中的Ca2+,考察了各因素对Ca2+去除的影响。结果表明:沸石与废水的固液比是影响Ca2+去除的最关键因素,温度和pH值的影响较大,而反应时间在最初10min内影响显著,之后则影响较小;在25℃,初始pH值8.04条件下,反应1h,Ca2+的去除率随着固液比的增加而增大,初始Ca2+的质量浓度为801.60mg/L时,保持沸石与废水固液比为3:100,Ca2+的去除率达到80.38%,剩余Ca2+仅为157.31mg/L;升高温度对Ca2+去除有促进作用,Ca2+的去除率从20℃时的77.30%增大到45℃时的90.71%;Ca2+去除在最初的50min内吸附达到平衡。人造沸石的红外光谱图表明脱钙过程主要是化学吸附。Removal of calcium from wastewater was carried out using waste activated sludge and artificial zeolites. The effects of parameters such as pH, temperature, reaction time and sorption duration on removal rate of Ca^2＋ were studied. The results show that solid-to-liquid ratio is the most important factor on the removal of Ca^2＋, pH and temperature have obvious influences on the process, and reaction time has little effect on removal rate of Ca^2＋ after reacting for 10 min. The removal rate of Ca^2＋ increases with increasing solid-to-liquid ratio under conditions of 25℃, initial pH 8.04, reacting for 1 h, 80,38% of the initial Ca^2＋ content （solution containing 801.60 mg/L of Ca^2＋） is removed under condition of solid-to-liquid ratio of 3：100, and terminal concentration of Ca^2＋ of 157,31 mg/L, The increase of temperature is advantageous to the removal of Ca^2＋, the removal rate of Ca^2＋ rises from 77.30% to 90,71% with temperature enhancing from 20 ℃ to 45 ℃, The removal of Ca^2＋ is finished in 50 min, According to the IR spectrum of artificial zeolite, chemical biosorption takes main effect on the removal of Ca^2＋.

关 键 词：剩余污泥 人造沸石 钙离子 废水净化 

分 类 号：X703[环境科学与工程—环境工程]