摘要
针对某城市污水处理厂剩余污泥,从pH值、吸附时间、污泥投加量、温度、铬(Ⅵ)浓度等方面研究了剩余污泥吸附剂对含铬(Ⅵ)废水的生物吸附性能。研究结果表明:废水的pH值是影响剩余污泥吸附铬(Ⅵ)的重要因素,适宜pH值为1.0～2.0;吸附是一个快速过程,适宜吸附时间为30min;在pH值为1.0,污泥投加量为8g/L,30℃吸附30min,对50mg/L铬(Ⅵ)废水的去除率可达99.65%;在20～60℃污泥吸附不受温度影响;用Langmuir和Freundlich等温吸附模型描述了污泥对铬(Ⅵ)的吸附结果;通过扫描电子显微镜/能谱仪(SEM/EDS)分析,吸附前后污泥的形貌变化不明显,元素含量发生变化。
A bench-scale experiment was conducted to study adsorption of chromium(Ⅵ) on excess sludge from a municipal wastewater treatment plant(WWTP),focusing on the influences of parameters such as pH,adsorption time,temperature,initial chromium(Ⅵ)concentration in wastewater and sludge(as the adsorbent) dosage.It is found that the adsorption process is fast with an adequate adsorption time of 30 min;pH value is a notable parameter affecting the adsorption,and adsorption capacity is independent of the temperature wh...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第7期165-167,173,共4页
Environmental Science & Technology
基金
全国优秀博士学位论文作者专项资金资助项目(200549)
国家自然科学基金项目(50874032)
上海市重点学科建设项目(B604)
关键词
剩余污泥
铬(Ⅵ)废水
生物吸附
excess sludge
chromium（Ⅵ）containing wastewater
biosorption
