Cellulose Nanofibrils Aerogel Cross-Linked by Poly(vinyl alcohol) and Acrylic Acid for Efficient and Recycled Adsorption with Heavy Metal Ions

被引：42

作者：

She, Jiarong ^{[1
,3
]}

Tian, Cuihua ^{[1
]}

Wu, Yiqiang ^{[1
,2
]}

Li, Xianjun ^{[1
,2
]}

Luo, Sha ^{[1
,3
]}

Qing, Yan ^{[1
,2
]}

Jiang, Zheng ^{[1
]}

机构：

[1] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China

[2] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China

[3] Hunan Qual Inspect & Testing Ctr Forestry Prod, Changsha 410004, Hunan, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2018年 / 18卷 / 06期

基金：

美国国家科学基金会;

关键词：

Cellulose Nanofibrils; Cross-Linked Porous Structure; Adsorption; Reusability; Wastewater Purification; RESPONSE-SURFACE METHODOLOGY; AQUEOUS-SOLUTIONS; REMOVAL; ADSORBENTS; NANOCRYSTALS; NANOCELLULOSE; HYDROGEL; CAPACITY; GASES;

D O I：

10.1166/jnn.2018.15264

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cellulose nanofibrils (CNFs), disintegrated from natural fibers, are promising alternatives in wastewater purification for the porous structure and numerous hydroxyls. The pristine CNFs aerogel has limited mechanical strength and are vulnerable to collapse when exposed to water. In this work, eco-friendly and recycled CNFs aerogel adsorbents were successfully prepared using cellulose nanofibrils (CNFs), which cross-linked by poly(vinyl alcohol) (PVA) and acrylic acid (AA). The combination of PVA and AA endowed CNFs aerogel strong three-dimensional porous structure and desirable adsorption properties. The heavy metal ions were adsorbed on the CNFs-PVA-AA (CPA) adsorbents efficiently and the maximum adsorption capacities for Cu2+ and Pb2+ approached 30.0 mg/g and 131.5 mg/g, respectively. The CPA adsorbent also showed excellent reusability and their adsorption capacities maintained 89% and 88% for Cu2+ and Pb2+ after 5 repeated uses. The adsorption of these heavy metal ions were confirmed to follow pseudo-second-order kinetic and Langmuir isotherm model. The functions of C = O and -OH were the major adsorption sites. Chemical adsorption combined with the porous physical adsorption made the CPA to be excellent adsorbent for the removal of heavy metal ions in wastewater.

引用

页码：4167 / 4175

页数：9

共 43 条

[1]

Agustiono K. T., 2006, CHEM ENG J, V118, P83

[2] Industrial wastes as low-cost potential adsorbents for the treatment of wastewater laden with heavy metals [J].