作者机构：
[蒋海燕; 周俊; 汪爱河; 汪彩文] College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, China;College of Civil Engineering, Hunan University, Changsha 410082, China;Zhongye Changtian International Engineering Co., Ltd, Changsha 410007, China;[杨柳] College of Civil Engineering, Hunan University, Changsha 410082, China, Zhongye Changtian International Engineering Co., Ltd, Changsha 410007, China;[张伟] College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, China, College of Civil Engineering, Hunan University, Changsha 410082, China
通讯机构：
[Zhang, W.] C;College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, China
关键词：
污泥;活性炭;结构表征;铬(VI);吸附
摘要：
以城市污水处理厂污泥为原料,采用磷酸活化-微波热解法制备得到污泥活性炭,并将其用于吸附水溶液中的Cr(VI)。分别采用元素分析仪(Vario EL cube)、比表面积孔径分布测定仪(ASAP2020)、扫描电镜(SEM)和傅里叶红外光谱(FT-IR)等仪器对原污泥及污泥活性炭的表面组成和结构进行表征,探讨污泥活性炭的孔隙结构参数和表面化学性能。通过静态吸附实验,考察了溶液初始pH,接触时间,初始Cr(VI)浓度对污泥活性炭吸附Cr(VI)效果的影响,并探讨了污泥活性炭去除Cr(VI)的机理。实验结果表明,pH越低吸附效果越好,吸附平衡时间为100 h。不同温度下吸附过程均符合Langmuir等温吸附模型,30℃时最大吸附容量为27. 55 mg/g;吸附动力学过程符合准二级速率方程(R~2 >0.99);污泥活性炭对Cr(VI)的去除是一个吸附-还原耦合的过程。
作者机构：
College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, China;[张骅; 徐舜开] College of Civil Engineering, Hunan University, Changsha 410082, China;Zhongye Changtian International Engineering Co. Ltd., Changsha 410007, China;[杨柳] College of Civil Engineering, Hunan University, Changsha 410082, China, Zhongye Changtian International Engineering Co. Ltd., Changsha 410007, China;[李黎武; 张伟] College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, China, College of Civil Engineering, Hunan University, Changsha 410082, China
通讯机构：
[Zhang, W.] C;College of Municipal and Mapping Engineering, Hunan City University, China
作者机构：
[施周; 张骅; 张伟; 张茜; 徐舜开] College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China;[施周; 张骅; 张伟; 张茜; 徐舜开] Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan Univ., Changsha, Hunan 410082, China;[张伟] Dept. of Urban Construction, Hunan City Univ., Yiyang, Hunan 413000, China
通讯机构：
College of Civil Engineering, Hunan Univ., China
摘要：
The dewatering and mineralization of sludge in the constructed reed bed was investigated in this study.The sludge from the secondary sedimentation tank is from in the wastewater treatment plant in Yiyang city,Hunan province.Anaerobic pond and oxidation ditch biological treatment processes is accepted there.The performance of the system was monitored for one year. Total Solids (TS), Volatile Solids(VS), Chemical Oxygen Demand, nutrients (TKN) and Total Phosphorus(TP), heavy metals in the sludge were analysed.The removal rate of COD,NH4-N,and TP of the percolated fluid for the first cycle was also monitored. TS content reached 36.5% for the surface layer and 37.8% for the bottom layer at the end of the examination period.Sludge stabilization in the bed was also observed(VS content decreased to 31.3% and 13.4% respectively for the surface and bottom layer).Concentration of nutrients of the sludge accumulated in the bed also decreased. The heavy metal concentration meets the European Union standards for heavy metals in case of agricultural disposal of the treated sludge.
