Improving the selectivity of magnetic graphene oxide through amino modification

被引:9
作者
Dai, Jiayong [1 ]
Zhao, Hongyan [1 ]
Ye, Yuting [1 ]
Wang, Li [1 ]
Cao, Shuyuan [1 ]
Su, Xiaojian [2 ]
Hu, Xuefeng [2 ]
Li, Lei [1 ]
机构
[1] Nanjing Med Univ, Sch Publ Hlth, Dept Hyg Anal & Detect, 101 Longmiandadao Rd, Nanjing 211166, Jiangsu, Peoples R China
[2] Nanjing Entry Exit Inspect & Quarantine Bur, Nanjing 211166, Jiangsu, Peoples R China
关键词
Cd(II); covalent bonding method; Cu(II); magnetic graphene oxide; selective ion adsorption; solvothermal method; HEAVY-METAL IONS; SURFACE MODIFICATION; AQUEOUS-SOLUTIONS; REMOVAL; NANOPARTICLES; ADSORBENT; ADSORPTION; NANOSHEETS; PRECIPITATION; NANOCOMPOSITE;
D O I
10.2166/wst.2017.354
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Fabricating efficient materials for environmental purposes is a priority and the subject of much attention nowadays. The objectives of this study are to adopt an amino modification approach to improve the selective removal capacity of magnetic graphene oxide (MGO) for Cu(II) ions, and explore how it performs in single and binary systems by taking Cd(II) as a comparison. After grafting the amino groups, the final material exhibited promoted capacities for Cu(II) and Cd(II), and a more apparent selective adsorption process can be observed. The maximum equilibrium adsorbances of amino modified MGO were 578.1 mg g(-1) for Cu(II) and 184.7 mg g(-1) for Cd(II) under our experimental conditions, compared with 319.1 mg g(-1) and 161.2 mg g(-1) of MGO for Cu(II) and Cd(II), respectively. Characterization results and experiment data confirmed that the introduction of N species contributed to the enhancement. This may pave the way for better understanding of the underlying mechanism, and provide inspiration for synthesizing new adsorbents.
引用
收藏
页码:2959 / 2967
页数:9
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