Preparation, characterization, and adsorption properties of magnetic multi-walled carbon nanotubes for simultaneous removal of lead(II) and zinc(II) from aqueous solutions

被引：25

作者：

Jiang, Lili ^{[1
,2
]}

Yu, Haitao ^{[3
]}

Zhou, Xiaomeng ^{[4
]}

Hou, Xingang ^{[2
]}

Zou, Zongshu ^{[1
]}

Li, Shujun ^{[4
]}

Li, Chuantong ^{[4
]}

Yao, Xiayan ^{[4
]}

机构：

[1] Northeastern Univ, Coll Mat & Met, 3-11 Wenhua Rd, Shenyang, Liaoning Provin, Peoples R China

[2] Lanzhou Univ Technol, Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou 730050, Gansu Province, Peoples R China

[3] Lanzhou Univ, Dept Lab Med, Hosp 1, 1 Donggang Rd, Lanzhou 730000, Gansu Province, Peoples R China

[4] Lanzhou Univ Technol, Sch Mat Sci & Technol, Langongping Rd, Lanzhou 730050, Gansu Province, Peoples R China

来源：

DESALINATION AND WATER TREATMENT | 2016年 / 57卷 / 39期

基金：

中国国家自然科学基金;

关键词：

Magnetic multi-walled carbon nanotubes; Adsorption; Metal ions; HEAVY-METAL IONS; POLY(ACRYLIC ACID); NANOPARTICLES; ADSORBENT; NANOCOMPOSITES; COPPER(II); COMPOSITE; GRAPHENE; KINETICS; SURFACE;

D O I：

10.1080/19443994.2015.1090924

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Novel-modified magnetic multi-walled carbon nanotubes (MMWCNTs) were synthesized via evaporating acid purification and co-precipitation method. MMWCNTs were used for simultaneously removing lead and zinc ions from aqueous solutions. Transmission electron microscope, field emission scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), and magnetization curve showed the morphology, composition, surface functional groups, and magnetic properties of MMWCNTs. Then, the adsorption effects were investigated by times, pH, and adsorbent dosages. The results showed that Fe3O4 of approximate 10nm successfully grafted on the surface of MWCNTs. The results of XRD, energy-dispersive X-ray spectroscopy, and XPS further confirmed that the iron oxides were Fe3O4. Adsorption data were analyzed with Lagergren pseudo-first-order, pseudo-second-order kinetic, intraparticle diffusion, and liquid film diffusion models. Langmuir isotherm model showed the maximum adsorption capacities as 67.25 and 3.759mg/g for lead and zinc ions, respectively. These results indicated that MMWCNTs may be a promising candidate for removing heavy metal ions from aqueous solutions.

引用

页码：18446 / 18462

页数：17

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