期刊论文

Adsorption of U(VI) fromaqueous solution by composite material known as MNO_2 /FeOOH and mechanism concerned

中文

安全与环境学报

1009-6094

2021

21

01

373-382

10.13637/j.issn.1009-6094.2020.0029

国家自然科学基金项目（11475080）；

本校为第一机构

采用化学沉积法制备了二氧化锰/羟基氧化铁（MnO2/FeOOH）复合材料,并将其用于吸附去除水中的放射性重金属铀。通过静态吸附试验,考察了Fe/Mn物质的量比、pH值、吸附时间和干扰离子等因素对MnO2/FeOOH吸附U（Ⅵ）效果的影响,利用扫描电镜-能谱分析（SEM-EDS）、X射线衍射（XRD）、拉曼光谱（Raman）、红外光谱（FT-IR）和X射线光电子能谱（XPS）对材料结构和形貌进行表征,并分析其吸附机理。结果表明,在投加量为150 mg/L、温度为30℃、U（Ⅵ）初始质量浓度为10 mg/L、pH值为5、Fe/Mn物质的量比为1/2及吸附时间为120 min的条件下,MnO2/FeOOH对U（Ⅵ）的去除率最大可达97.7%,且pH值对铀去除效果的...

The purpose of this paper is to synthesize a low-cost, environmentally friendly and efficient adsorbent for adsorption of the radioactive uranium in the aqueous solution. For the said purpose,we have been trying to take some familiar raw materials, say,KMnO_4,MnSO_4 and FeCl_3 to prepare for manganese dioxide /hydroxyl oxidize iron composite materials (MNO_2 / FeOOH) through a simple chemical deposition method. To achieve the purpose,through the static adsorption experiments, we have done an investigation of the effects of the Fe /Mn molar rati...