MOF-implanted poly (acrylamide-co-acrylic acid)/chitosan organic hydrogel for uranium extraction from seawater

被引：63

作者：

Song, Yucheng ^{[1
]}

Li, Hui ^{[1
]}

Shan, Tianhang ^{[1
]}

Yang, Peipei ^{[1
]}

Li, Songwei ^{[1
]}

Liu, Zhong ^{[2
]}

Liu, Chuntai ^{[1
]}

Shen, Changyu ^{[1
]}

机构：

[1] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Peoples R China

[2] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sal, Qinghai Prov Key Lab Resources & Chem Salt Lakes, Xining 810008, Qinghai, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2023年 / 302卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Hydrogel; Low swelling rate; Uranium capture; Seawater; AQUEOUS-SOLUTION; GRAPHENE OXIDE; REMOVAL; ADSORPTION; EFFICIENT; PERFORMANCE; COMPOSITE; RECOVERY; VI;

D O I：

10.1016/j.carbpol.2022.120377

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study, a composite hydrogel with a low swelling ratio, excellent mechanical properties, and good U (VI) adsorption capacity was developed by incorporating a metal-organic framework (MOF) with a poly (acrylamide-co-acrylic acid)/chitosan (P(AM-co-AA)/CS) composite. The CS chain, which contains -NH2, reduces the swelling ratio of the hydrogel to 4.17 after 5 h of immersion in water. The coordinate bond between the MOF and carboxyl group on the surface of P(AM-co-AA)/CS improves the mechanical properties and stability of P(AM-co-AA)/CS. The U(VI) adsorption capacity of P(AM-co-AA)/CS/MOF-808 is 159.56 mg g-1 at C0 = 99.47 mg L-1 and pH = 8.0. The adsorption process is well fitted by the Langmuir isotherm and pseudo-second-order model. The P(AM-co-AA)/CS/MOF-808 also exhibits good repeatability and stability after five adsorption-desorption cycles. The uranium adsorption capacity of the developed adsorbent after one month in natural seawater is 6.2 mg g- 1, and the rate of uranium adsorption on the hydrogel is 0.21 mg g-1 day-1.

引用

页数：11

共 80 条

[1] Kinetics and Thermodynamics Studies on the Recovery of Thorium Ions Using Amino Resins with Magnetic Properties [J].