CaCO3-coated PVA/BC-based composite for the simultaneous adsorption of Cu(II), Cd(II), Pb(II) in aqueous solution

被引：37
|
作者：
Zhang, Yu [1 ]
Zhang, Liang [1 ,2 ]
Gao, Ruohui [1 ]
Zhong, Lvling [1 ]
Xue, Juanqin [1 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Chem & Chem Engn, Yanta Rd 13, Xian 710055, Shaanxi, Peoples R China
[2] Xian Univ Architecture & Technol, Shanxi Prov Key Lab Gold & Resource, Xian 710055, Shaanxi, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2021年 / 267卷
基金：
中国国家自然科学基金;
关键词：
CaCO3; Ion-exchange; Selective adsorption; PVA; HEAVY-METAL; REMOVAL; NANOPARTICLES; ADSORBENTS; COST; ACID;
D O I：
10.1016/j.carbpol.2021.118227
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A polymer composite material comprising polyvinyl alcohol/bacterial cellulose/calcium carbonate (PVA/BC/ CaCO3) was prepared for enabling the selective adsorption of toxic heavy metal ions, such as Cd(II), Cu(II), and Pb(II) from solution. FT-IR, SEM and XRD analyses confirmed the successful incorporation of CaCO3 into the PVA-based polymer by chemical cross-linking with epichlorohydrin. The optimal pH for adsorption of the metal ions onto PVA/BC/CaCO3 was determined to be 6.0. The pseudo-first-order kinetics model was best-suited for fitting the adsorption kinetics data, and the Langmuir model was best-suited for fitting the thermodynamic adsorption data. The maximum adsorption capacities of PVA/BC/CaCO3 for Cu(II), Pb(II), and Cd(II) were found to be 57.1, 513.6, and 238.6 mg/g, respectively, at 40 degrees C. In addition, the adsorbent was found to be highly recyclable. Overall, PVA/BC/CaCO3 adsorbent has the applicable potential in the removal of heavy metal ions from contaminated solution.
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页数：11
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