期刊论文

Xie, Shui-Bo

中文

中国有色金属学报

1004-0609

2014

24

9

2418-2425

10.19476/j.ysxb.1004.0609.2014.09.031

11175081:国家自然科学基金 11475080:国家自然科学基金 20134324110003:高等学校博士学科点专项科研基金 13JJ3078:湖南省自然科学基金 13K085:湖南省高等学校创新平台项目

本校为第一且通讯机构

以造纸厂厌氧颗粒污泥为原料制备的粉末厌氧颗粒污泥(PAGS)作为生物吸附剂,研究pH值、吸附剂PAGS的用量、U(Ⅵ)初始浓度和吸附时间对PAGS吸附U(Ⅵ)的影响。采用模型模拟、扫描电镜分析、能谱分析、红外光谱分析和离子交换试验等手段探讨PAGS吸附U(Ⅵ)的机理。结果表明,在U(Ⅵ)初始浓度为10 mg/L、温度为30℃时,PAGS吸附U(Ⅵ)的最佳条件是pH值为6,PAGS用量为2.0 g/L,吸附平衡时间为60 min。用准二级动力学模型(R~2≈1)和Freundlich等温模型(R~2>0.99)均可较好地拟合其吸附过程。扫描电镜、能谱分析和离子交换试验结果表明,离子交换是PAGS吸附U(Ⅵ)的主要方式,参与交换的主要离子为Ca~(2+);红外光...

The anaerobic granular sludge from a paper mill was used to prepare powdered anaerobic granular sludge (PAGS) as a novel biological adsorbent. Experimental parameters such as pH value, adsorbent PAGS dosage, initial U(VI) concentration and adsorption time were examined to investigate their effects on the adsorption of U(VI) by PAGS. The adsorption mechanism was studied by model simulation, scanning electron microscopy, energy-dispersive spectrometry, infrared spectroscopy and ion exchange experiments. The results show that the maximum adsorption occurs at pH value of 6, adsorbent PAGS dosage o...