期刊论文

Xie, S.

中文

环境科学学报

0253-2468

2014

34

9

2271-2278

10.13671/j.hjkxxb.2014.0644

国家自然科学基金（No.11175081）； 湖南省科技计划重点项目（No.2011SK2015）； 湖南省高校创新平台项目（No.13K085,13K086）； 湖南省自然科学基金项目（No.13JJ3078）~~；

本校为第一且通讯机构

通过人工合成的方法制得腐殖酸改性针铁矿(HA-α-FeOOH),考察了吸附时间、吸附剂用量、U(VI)初始浓度和pH值等因素对吸附U(VI)过程的影响.同时,利用傅里叶红外光谱(FTIR)、扫描电镜(SEM)和X射线能谱(EDS)分析了其对U(VI)的吸附机理.试验结果表明,在25℃、pH为4的条件下,腐殖酸改性针铁矿作用4h对5mg·L~(-1)的含铀废水的去除率几乎达到100%.Freundlich等温吸附模型、准二级动力学模型对吸附过程的拟合效果较好,主要吸附模式为多层吸附;改性针铁矿对U(VI)的吸附是自发的吸热反应.SEM- EDS和FIIR分析结果表明,改性针铁矿吸附U(VI)的机理主要表现为内层络合作用及离子交换,与U(VI)作用的基团主要是...

The goethite modified with humic acid (HA-α-FeOOH) was developed as an artificial absorbent for the removal of uranium (VI) ions from uranium-contained wastewater. To investigate the effects of experimental parameters on adsorption behavior, a batch of experiments were performed by changing solution pH, HA-α-FeOOH dosage, initial concentration of U(VI) ions and contact time. The adsorption characteristics of U(VI) by HA-α-FeOOH were analyzed by FT-IR, SEM and EDX. It is shown that the removal rate of 5 mg·L-1 U(VI) wastewater by HA-α-FeOOH...