Understanding the sorption behavior of Pu4+ on poly(amidoamine) dendrimer functionalized carbon nanotube: sorption equilibrium, mechanism, kinetics, radiolytic stability, and back-extraction studies

被引：14

作者：

Kumar, Parveen ^{[2
]}

Sengupta, Arijit ^{[1
]}

Deb, Ashish Kumar Singha ^{[3
,4
]}

Dasgupta, Kinshuk ^{[5
]}

Ali, Sk. Musharaf ^{[3
,4
]}

机构：

[1] Bahbha Atom Res Ctr, Radiochem Div, Mumbai, Maharashtra, India

[2] Indian Inst Technol, Mandi, Himachal Prades, India

[3] Bahbha Atom Res Ctr, Chem Engn Div, Mumbai, Maharashtra, India

[4] Homi Bhabha Natl Inst, Mumbai, Maharashtra, India

[5] Bahbha Atom Res Ctr, Mech Met Div, Mumbai, Maharashtra, India

来源：

RADIOCHIMICA ACTA | 2017年 / 105卷 / 09期

关键词：

Amidoamine; plutonium; sorption; stripping; back extraction; AQUEOUS-SOLUTIONS; METAL-IONS; ACTIVATED CARBON; GRAPHENE OXIDE; HEAVY-METALS; ADSORPTION; REMOVAL; PLUTONIUM; PRECONCENTRATION; SEPARATION;

D O I：

10.1515/ract-2016-2722

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Poly(amidoamine) dendrimer functionalized carbon nanotube was demonstrated as highly efficient sorbent of the Pu4+ from radioactive waste solution. The second generation dendrimer was found to have more efficiency as compared to the 1st generation might be due to the availability of more functionality for coordinating to the Pu4+ ion. Analysis of different isotherm models revealed that, Langmuir isotherm was predominantly operating through chemi-sorption (with the sorption energy 10.07 and 16.95 kJ mol(-1) for 1st and 2nd generation dendrimer) with the sorption capacity 89.22 mg g(-1) and 92.48 mg g(-1) for 1st and 2nd generation dendrimer, respectively. Analysis of different sorption kinetics model revealed that the sorption proceeded via pseudo 2nd order reaction. The 2nd generation dendrimer was found to be radiolytically more stable while oxalic acid was found to be suitable for quantitative back extraction of Pu4+.

引用

页码：677 / 688

页数：12

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