[1]刘阳,赵丹,李大鹏,等.MgF-LDHs改性无烟煤及其对Sb(Ⅴ)的去除研究[J].中国给水排水,2022,38(7):90-96.
　LIUYang,ZHAODan,LIDa-peng,et al.Modification of Anthracite by MgFe-LDHs for Sb(Ⅴ) Removal[J].China Water & Wastewater,2022,38(7):90-96.
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MgF-LDHs改性无烟煤及其对Sb(Ⅴ)的去除研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第7期 页码: 90-96 栏目: 出版日期: 2022-04-01
Title:
Modification of Anthracite by MgFe-LDHs for Sb(Ⅴ) Removal
作者:
刘阳1， 赵丹1， 李大鹏1， 陈雪文2， 董延茂3， 杨雨杰1
（1.苏州科技大学 环境科学与工程学院，江苏 苏州 215009；2.苏州高新区狮山街道建设局，江苏 苏州 215009；3.苏州科技大学 化学生物与材料工程学院，江苏 苏州 215009）
Author(s):
LIU　Yang1， ZHAO　Dan1， LI　Da-peng1， CHEN　Xue-wen2， DONG　Yan-mao3， YANG　Yu-jie1
（1. School of Environmental Science and Engineering， Suzhou University of Science and Technology， Suzhou 215009， China； 2. Shishan Sub-district Construction Bureau of Suzhou High-tech Zone， Suzhou 215009， China； 3. School of Chemical Biology and Materials Engineering， Suzhou University of Science and Technology， Suzhou 215009， China）
关键词:
无烟煤;  Sb(Ⅴ);  镁铁类水滑石化合物;  改性;  吸附性能
Keywords:
anthracite;  Sb(Ⅴ);  magnesium iron hydrotalcite-like compound(MgFe-LDHs);  modification;  adsorption performance
摘要:
为提高无烟煤对Sb（Ⅴ）的吸附性能，采用碱性水热-共沉淀法原位合成镁铁类水滑石化合物表面改性无烟煤（Anthr/MgFe-LDHs）。采用扫描电子显微镜（SEM）、X-射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）等对产物进行表征，研究了Anthr/MgFe-LDHs对Sb（Ⅴ）的吸附性能。结果表明，当镁与铁物质的量之比为2∶1时，Anthr/MgFe-LDHs对Sb（Ⅴ）的吸附性能最佳，最大吸附量为6.77 mg/g；当水溶液pH值为5~11时，随着pH值的升高，Sb（Ⅴ）去除率逐渐降低。热力学参数表明，Anthr/MgFe-LDHs对Sb（Ⅴ）的吸附是自发的吸热过程，吸附机理符合Langmuir模型和准二级动力学方程。Anthr/MgFe-LDHs 经过4次循环使用后对Sb（Ⅴ）的去除率仍接近80%，具有良好的应用前景。
Abstract:
Magnesium iron hydrotalcite-like compounds were synthesized in situ by alkaline hydrothermal coprecipitation method for modification of anthracite(Anthr/MgFe-LDHs) to improve the Sb(Ⅴ) adsorption performance of anthracite. The products were characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and Fourier fransform infrared spectrometer (FTIR), and the adsorption performance of Anthr/MgFe-LDHs for Sb(Ⅴ) was investigated. Anthr/MgFe-LDHs had the best adsorption performance for Sb(Ⅴ) when the molar ratio of magnesium and iron was 2∶1, and the maximum adsorption capacity was 6.77 mg/g. With the increase of pH, the removal efficiency of Sb(Ⅴ) decreased gradually when the pH of aqueous solution was in the range of 5-11. The thermodynamic parameters showed that the adsorption of Sb(Ⅴ) by Anthr/MgFe-LDHs was a spontaneous endothermic process, and the adsorption mechanism conformed to Langmuir model and quasi?second?order kinetic equation. After four cycles of adsorption and desorption, Anthr/MgFe-LDHs still had a high Sb(Ⅴ) removal efficiency that was close to 80%, indicating that it has a promising application prospect.

相似文献/References:

[1]韩子恒,白仁碧,贾祥苓,等.Fenton法对水中Sb(Ⅲ)和Sb(Ⅴ)的去除研究[J].中国给水排水,2022,38(23):109.
　HANZi-heng,BAIRen-bi,JIAXiang-ling,et al.Fenton Process for Removal of Sb(Ⅲ) and Sb(Ⅴ) from Wastewater[J].China Water & Wastewater,2022,38(7):109.

更新日期/Last Update: 2022-04-01