Enhanced sequestration of tetracycline by Mn(II) encapsulated mesoporous silica nanoparticles: Synergistic sorption and mechanism

Qiao，Han1,2; Wang，Xiaoxiang2; Liao，Peng2; Zhang，Cheng2; Liu，Chongxuan2

2021-12-01

10.1016/j.chemosphere.2021.131334

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

A novel Mn(II) encapsulated mesoporous silica nanoparticles (Mn-MSNs) was developed for efficiently removing antibiotic tetracycline from aqueous solutions. The material has a well-ordered, hexagonal mesopore structure with a large specific surface area (720 m/g) and maximum sorption capacity (229 mg/g) that is about an order of magnitude higher than that of mesoporous silica nanoparticles without Mn-encapsulated, or encapsulated with other transition metal cations Fe and Cu. Sorption results showed that the materials can sequestrate tetracycline within a large concentration range (5 μg/L–450 mg/L). Batch sorption experiment, spectroscopic analysis and density functional theory calculation collectively indicated that Mn–O complexation was the dominant mechanism for the tetracycline sorption. Electrostatic attraction and cation-π interaction also contributed to tetracycline sorption with their contribution levels varying with pH in a synergetic way with the Mn–O complexation. The Mn(II) encapsulated MSNs exhibited a good regeneration property over five repeated sorption-desorption cycles, demonstrating its promising potential in the cost-effective applications of sequestrating tetracycline from wastewater, drinking water, and contaminated solutions.

Density functional theory Mn-MSNs Mn–O complexation Sorption mechanism Tetracycline contamination Tetracycline sequestration

EI ; SCI

英语

通讯

WOS:000703682500001

20212610574961

Binding energy ; Cost effectiveness ; Manganese compounds ; Mesoporous materials ; Metal nanoparticles ; Positive ions ; Potable water ; Silica nanoparticles ; SiO2 nanoparticles ; Spectroscopic analysis ; Transition metals

Water Resources:444 ; Metallurgy and Metallography:531 ; Nanotechnology:761 ; Chemistry:801 ; Physical Chemistry:801.4 ; Industrial Economics:911.2 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

ENVIRONMENT/ECOLOGY

2-s2.0-85108782290

Scopus

1.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,518055,China

Qiao，Han,Wang，Xiaoxiang,Liao，Peng,et al. Enhanced sequestration of tetracycline by Mn(II) encapsulated mesoporous silica nanoparticles: Synergistic sorption and mechanism[J]. CHEMOSPHERE,2021,284.

Qiao，Han,Wang，Xiaoxiang,Liao，Peng,Zhang，Cheng,&Liu，Chongxuan.(2021).Enhanced sequestration of tetracycline by Mn(II) encapsulated mesoporous silica nanoparticles: Synergistic sorption and mechanism.CHEMOSPHERE,284.

Qiao，Han,et al."Enhanced sequestration of tetracycline by Mn(II) encapsulated mesoporous silica nanoparticles: Synergistic sorption and mechanism".CHEMOSPHERE 284(2021).