Functionally-designed floatable amino-modified ZnLa layered double hydroxides/cellulose acetate beads for tetracycline removal: Performance and mechanism
The over-reliance on tetracycline antibiotics (TC) in the animal husbandry and medical field has seriously affected the safety of the ecological environment. Therefore, how to effectively treat tetracycline wastewater has always been a long-term global challenge. Here, we developed a novel polyethyleneimine (PEI)/Zn-La layered double hydroxides (LDH)/cellulose acetate (CA) beads with cellular interconnected channels to strengthen the TC removal. The results of the exploration on its adsorption properties illustrated that the adsorption process exhibited a favorable correlation with the Langmuir model and the pseudo-second-order kinetic model, namely monolayer chemisorption. Among the many candidates, the maximum adsorption capacity of TC by 10 %PEI-0.8LDH/CA beads was 316.76 mg/g. Apart from that, the effects of pH, interfering species, actual water matrix and recycling on the adsorption of TC by PEI-LDH/CA beads were also analyzed to verify their superior removal capability. The potential for industrial-scale applications was expanded through fixed-bed column experiments. The proven adsorption mechanisms mainly included electrostatic interaction, complexation, hydrogen bonding, n-π EDA effect and cation-π interaction. The self-floating high-performance PEI-LDH/CA beads exploited in this work provided fundamental support for the practical application of antibiotic-based wastewater treatment.
National Key Research and Development Program of China[2019YFD1100300] ; National Natural Science Foundation of China["41877396","52170028"] ; Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology[QA202129]
|WOS Research Area|
Chemistry ; Polymer Science
Chemistry, Applied ; Chemistry, Organic ; Polymer Science
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:4
|Document Type||Journal Article|
|Department||School of Environmental Science and Engineering|
1.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE),School of Environment,Harbin Institute of Technology,Harbin,150090,China
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
Wang，Qinyu,Zuo，Wei,Tian，Yu,et al. Functionally-designed floatable amino-modified ZnLa layered double hydroxides/cellulose acetate beads for tetracycline removal: Performance and mechanism[J]. CARBOHYDRATE POLYMERS,2023,311.
Wang，Qinyu.,Zuo，Wei.,Tian，Yu.,Kong，Lingchao.,Cai，Guiyuan.,...&Zhang，Jun.(2023).Functionally-designed floatable amino-modified ZnLa layered double hydroxides/cellulose acetate beads for tetracycline removal: Performance and mechanism.CARBOHYDRATE POLYMERS,311.
Wang，Qinyu,et al."Functionally-designed floatable amino-modified ZnLa layered double hydroxides/cellulose acetate beads for tetracycline removal: Performance and mechanism".CARBOHYDRATE POLYMERS 311(2023).
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