New insights on the preparation of amine covalent organic polymer and its adsorption properties

被引:3
|
作者
Hou, Yutong [1 ,2 ,3 ]
Jia, Aiyuan [1 ,2 ,3 ]
Qin, Xueming [1 ,2 ,3 ]
Yang, Xinru [1 ,2 ,3 ]
Xie, Jiayin [1 ,2 ,3 ]
Li, Xiaoyu [1 ,2 ,3 ]
Zhao, Yongsheng [1 ,2 ,3 ]
机构
[1] Jilin Univ, Coll New Energy & Environm, Key Lab Groundwater Resources & Environm, Minist Educ, 2519 Jiefang Rd, Changchun 130021, Peoples R China
[2] Jilin Univ, Coll New Energy & Environm, Jilin Prov Key Lab Water Resources & Environm, 2519 Jiefang Rd, Changchun 130021, Peoples R China
[3] Jilin Univ, Coll New Energy & Environm, Natl & Local Joint Engn Lab Petrochem Contaminated, Changchun 130021, Peoples R China
基金
中国国家自然科学基金;
关键词
New organic covalent polymer material; Adsorption; Electrostatic attraction; Cationic dye removal; LOW-COST ADSORBENTS; AQUEOUS-SOLUTION; METHYLENE-BLUE; SELECTIVE ADSORPTION; DYE REMOVAL; HUMIC-ACID; WATER; FRAMEWORKS; BIOCHAR; DEGRADATION;
D O I
10.1016/j.envpol.2023.122659
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dye pollution is becoming increasingly severe. This study used the Schiff base reaction to synthesize a polyaromatic ring covalent organic polymer material with amide bonds and high electronegativity named SLEL-9 to adsorb Methylene Blue (MB) and Rhodamine B (RhB). SLEL-9 was characterized by Fourier transform infra-red spectra, X-ray photoelectron spectra, Brunauer-Emmett-Teller (BET), zeta potential analysis, and other techniques. It was found that SLEL-9 material contains C-C, C--N, C-N, and C--O. SLEL-9 had a zeta potential of about -45 mV under neutral conditions, which proved that the material had been synthesized successfully. The BET and Langmuir surface areas of SLEL-9 were 35.187 m2 g-1 and 56.419 m2 g-1, respectively. The adsorptions of SLEL-9 on low concentration (10 mg L-1) Methylene Blue and Rhodamine B reached equilibrium within 48 h. The results showed that SLEL-9's adsorption of dye molecules are more consistent with pseudo-second-order kinetic and Langmuir isotherm model. The adsorption experiments showed that the adsorption process is a spontaneous endothermic reaction, mainly chemisorption. The maximum adsorption capacity of SLEL-9 for MB and RhB were 132.45 mg g-1 and 101.94 mg g-1. In addition, this study investigated to determine the optimal reaction parameters. The primary mechanisms of SLEL-9 adsorption of two dyes are n ->pi* interaction, pi-pi EDA interaction and electrostatic attraction. Selective adsorb ability experiment results showed that SLEL-9 could selectively adsorb MB and RhB to a certain extent. Finally, it was found that SLEL-9 can maintain over 70% adsorption capacity after five reuses and can maintain stability after soaking in different pH water and organic solvents for 120 h. SLEL-9 proved to be a promising organic covalent polymer adsorption material for the removal of Methylene Blue and Rhodamine B in water.
引用
收藏
页数:14
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