当前位置: X-MOL 学术Radiochim. Acta › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Adsorptive removal of PAR and Arsenazo-III from radioactive waste solutions by modified sugarcane bagasse as eco-friendly sorbent
Radiochimica Acta ( IF 1.8 ) Pub Date : 2020-10-25 , DOI: 10.1515/ract-2020-0022
Ezzat A. Abdel-Galil 1 , Marwa A. Eid 1 , Ahmed M. Shahr El-Din 1
Affiliation  

Abstract In this paper, sugarcane bagasse (SCB) was modified using phosphoric acid. The modified sugarcane bagasse (MSCB) has been used to remove 4-(2-pyridylazo)resorcinol (PAR) and Arsenazo-III (Ar-III) from liquid radioactive waste. The surface morphology and functional groups of the MSCB were studied using scanning electron microscopy (SEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). Adsorption ability of MSCB has been tested by batch mode through some relevant factors like initial pH, reaction time, initial coloring reagents (PAR and Ar-III) concentrations, and adsorbent weight. At adsorption equilibrium time 180 min and pH values of 3 and 1 for PAR and Ar-III; the maximum removal (%) for both PAR and Ar-III were 93 and 57%, respectively. The adsorption isotherm data are representative well to Freundlich isotherm model. The mean free energy of adsorption, E (kJ/mol), has been estimated as 5.75 and 2.28 kJ/mol for PAR and Ar-III, respectively, which suggests that the adsorption occurred physically. The maximum adsorption capacity of MSCB for PAR and Ar-III is 96.62 and 15.18 mg/g, respectively. The adsorption kinetics are better fitted by the pseudo-second-order model. The partial film along with intra-particle diffusion controlled the diffusion of coloring reagents from the solution bulk to the particle interior pores. Application of MSCB for removing PAR and Ar-III from simulated liquid radioactive waste containing U(VI) and Th(VI) ions has been achieved successfully.

中文翻译:

改性甘蔗渣作为环保吸附剂吸附去除放射性废液中的PAR和Arsenazo-III

摘要 本文采用磷酸对甘蔗渣(SCB)进行改性。改性甘蔗渣 (MSCB) 已用于从液体放射性废物中去除 4-(2-吡啶偶氮) 间苯二酚 (PAR) 和砷化合三 (Ar-III)。使用扫描电子显微镜 (SEM)、X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR) 和热重分析 (TGA) 研究了 MSCB 的表面形貌和官能团。MSCB 的吸附能力已通过一些相关因素,如初始 pH 值、反应时间、初始着色剂(PAR 和 Ar-III)浓度和吸附剂重量,通过批处理模式进行测试。PAR 和 Ar-III 在吸附平衡时间为 180 分钟,pH 值为 3 和 1 时;PAR 和 Ar-III 的最大去除率 (%) 分别为 93% 和 57%。吸附等温线数据很好地代表了 Freundlich 等温线模型。PAR 和 Ar-III 的平均吸附自由能 E (kJ/mol) 分别估计为 5.75 和 2.28 kJ/mol,这表明吸附是物理发生的。MSCB 对 PAR 和 Ar-III 的最大吸附容量分别为 96.62 和 15.18 mg/g。吸附动力学更适合伪二级模型。部分薄膜与颗粒内扩散一起控制了着色剂从溶液本体到颗粒内部孔的扩散。已成功应用MSCB去除含有U(VI)和Th(VI)离子的模拟液体放射性废物中的PAR和Ar-III。对于 PAR 和 Ar-III,估计分别为 5.75 和 2.28 kJ/mol,这表明吸附是物理发生的。MSCB 对 PAR 和 Ar-III 的最大吸附容量分别为 96.62 和 15.18 mg/g。吸附动力学更适合伪二级模型。部分薄膜与颗粒内扩散一起控制了着色剂从溶液本体到颗粒内部孔的扩散。已成功应用MSCB去除含有U(VI)和Th(VI)离子的模拟液体放射性废物中的PAR和Ar-III。对于 PAR 和 Ar-III,估计分别为 5.75 和 2.28 kJ/mol,这表明吸附是物理发生的。MSCB 对 PAR 和 Ar-III 的最大吸附容量分别为 96.62 和 15.18 mg/g。吸附动力学更适合伪二级模型。部分薄膜与颗粒内扩散一起控制了着色剂从溶液本体到颗粒内部孔的扩散。已成功应用MSCB去除含有U(VI)和Th(VI)离子的模拟液体放射性废物中的PAR和Ar-III。吸附动力学更适合伪二级模型。部分薄膜与颗粒内扩散一起控制了着色剂从溶液本体到颗粒内部孔的扩散。已成功应用MSCB去除含有U(VI)和Th(VI)离子的模拟液体放射性废物中的PAR和Ar-III。吸附动力学更适合伪二级模型。部分薄膜与颗粒内扩散一起控制了着色剂从溶液本体到颗粒内部孔的扩散。已成功应用MSCB去除含有U(VI)和Th(VI)离子的模拟液体放射性废物中的PAR和Ar-III。
更新日期:2020-10-25
down
wechat
bug