Selective removal of heavy metal ions in aqueous solutions by sulfide-selector intercalated layered double hydroxide adsorbent
来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第9期
论文作者:Jing Wang Liang Zhang Tianshu Zhang Ting Du Tao Li Tianli Yue Zhonghong Li Jianlong Wang
文章页码:1809 - 1816
摘 要:Remaining largely under-appreciated,a majority of metal ion sorbents are limited in their target selectivity.In this work,a 3 D sulfide intercalated NiFe-layered double hydroxide(NFL-S)hierarchical sorbent has been synthesized for selective heavy metal removal.The intercalation of sulfurated groups in the interlayer of the layered double hydroxide(LDH)nanosheets endows NFL-S as a selective heavy metal ion filter;the selectivity of NFL-S for heavy metals is in the order of Pb2+>Cu2+≥Zn2+>Cd2+>Mn2+,and NFL-S has high kd values for Pb2+(~106 mL/g)and Cu2+(~105 mL/g).Scanning electron microscopy,X-ray photoelectron spectroscopy and powder X-ray diffraction were used to analyze the composition of the as-prepared nanoadsorbent.The selective adsorption behavior was systematically studied using batch experiments,and the performance was evaluated through kinetic and isotherm studies.Moreover,the adsorption mechanism of heavy metals by NFL-S through surface complexation was also investigated,which shows great potential for water decontamination.
Jing Wang1,Liang Zhang1,Tianshu Zhang1,Ting Du1,Tao Li2,Tianli Yue1,Zhonghong Li1,Jianlong Wang1
1. College of Food Science and Engineering, Northwest A&F University2. Shaanxi Institute for Food and Drug Control
摘 要:Remaining largely under-appreciated,a majority of metal ion sorbents are limited in their target selectivity.In this work,a 3 D sulfide intercalated NiFe-layered double hydroxide(NFL-S)hierarchical sorbent has been synthesized for selective heavy metal removal.The intercalation of sulfurated groups in the interlayer of the layered double hydroxide(LDH)nanosheets endows NFL-S as a selective heavy metal ion filter;the selectivity of NFL-S for heavy metals is in the order of Pb2+>Cu2+≥Zn2+>Cd2+>Mn2+,and NFL-S has high kd values for Pb2+(~106 mL/g)and Cu2+(~105 mL/g).Scanning electron microscopy,X-ray photoelectron spectroscopy and powder X-ray diffraction were used to analyze the composition of the as-prepared nanoadsorbent.The selective adsorption behavior was systematically studied using batch experiments,and the performance was evaluated through kinetic and isotherm studies.Moreover,the adsorption mechanism of heavy metals by NFL-S through surface complexation was also investigated,which shows great potential for water decontamination.
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