Magnetic red mud/chitosan based bionanocomposites for adsorption of Cr(VI) from aqueous solutions: synthesis, characterization and adsorption kinetics

被引：16

作者：

Liu, Xiaoqi ^{[1
,2
]}

Zhang, Yanyun ^{[1
,2
]}

Liu, Yan ^{[1
,2
]}

Zhang, Ting'an ^{[1
,2
]}

机构：

[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China

[2] Northeastern Univ, Key Lab Ecol Met Multimetall Ores, Minist Educ, Shenyang 110819, Peoples R China

来源：

POLYMER BULLETIN | 2023年 / 80卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Magnetic; Chromium (VI); Red mud; Neutralization; Adsorption; CROSS-LINKED CHITOSAN; IMPRINTED POLYMER; REMOVAL; MUD; NANOCOMPOSITES; NANOPARTICLES; ADSORBENT; CHROMIUM; BEHAVIOR; OXIDE;

D O I：

10.1007/s00289-022-04137-x

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Magnetic red mud/chitosan (MRM/CS) based bionanocomposites were prepared by the neutralization method, and this method had the advantages of simplicity, low-cost and eco-friendly. The adsorbents were characterized by XRD, FTIR and VSM analysis. The effects of various parameters, such as RM addition amounts, pH, concentration, temperature, time and co-existing metal ions, on the adsorption of Cr(VI) were studied. Moreover, adsorption kinetic, isotherm and thermodynamic of the Cr(VI) adsorption were analyzed. The results show that the MRM/CS composite has good recoverability (8.56 emu center dot g(-1)) and adsorption performance (7.79 mg center dot g(-1), 303 K, pH = 3). The process of the adsorption reaction conforms to the Langmuir model and the pseudo-second-order kinetic model, suggesting that the adsorption of Cr(VI) ions on the surface of CS-based adsorbents are monolayer adsorption and chemisorption. Thermodynamic study reveals that the adsorption is spontaneous and endothermic.

引用

页码：2099 / 2118

页数：20

共 41 条

[1] Cube-octameric silsesquioxane (POSS)-capped magnetic iron oxide nanoparticles for the efficient removal of methylene blue [J].