It has been estimated that between 94 million and 220 million people around the world are at risk of consuming drinking water that contain arsenic concentrations higher than 10μg/L(Podgorski and Berg,2020).
The difficulty in achieving high removal efficiency for contaminants in textile wastewater over a wide range of p H impedes the progress of its treatment technique greatly.Herein,a facile and sustainable strategy was ...The difficulty in achieving high removal efficiency for contaminants in textile wastewater over a wide range of p H impedes the progress of its treatment technique greatly.Herein,a facile and sustainable strategy was adopted for constructing magnetic ordered mesoporous polymers(M-OMPs)without the assistance of organic solvent and catalyst.The prepared M-OMPs were endowed with high special surface area and good superparamagnetism simultaneously,and exhibited high removal efficiency(>99%)for Methylene Blue(MB)within a short time(10 min)at a concentration of 50 mg/L.What’s more,high removal efficiency was achieved over a wide range of p H 2-12 and the adsorption capacity for MB on M-OMPs was substantially retained even after 5 adsorption-desorption cycles,further demonstrating the application potential of M-OMPs in the decontamination of textile wastewater.展开更多
Covalent organic frameworks(COFs)have been widely used to prepare solid-phase microextraction(SPME)coatings due to their large specific surface area and adjustable pore size.However,the weak inherent hydrophilicity of...Covalent organic frameworks(COFs)have been widely used to prepare solid-phase microextraction(SPME)coatings due to their large specific surface area and adjustable pore size.However,the weak inherent hydrophilicity of COFs restricts their extraction performance for polar phenolic compounds.In this work,COFs were combined with chitosan(CS)via Schiff base reaction to prepare novel SPME coating materials.The incorporation of CS,which contains abundant hydrophilic functional groups,eff ectively enhanced the hydrophilicity of the CS/COF composite,thus boosting its interaction affinity towards polar phenols.In combination with gas chromatography—mass spectrometry(GC–MS),an efficient and sensitive analytical method was established.Under optimal conditions,the developed method demonstrated a broad linear range(5.0–1.0×10^(4)ng/L,R^(2)>0.9972),low detection limits(0.78–1.3 ng/L),good reproducibility(relative standard deviations(RSDs)<8.8%),and excellent enrichment factors(5993–41,441).Moreover,the established method was successfully applied to quantify phenolic compounds in grapes,and the recoveries ranged from 92.2%to 111%with RSDs of 2.3%–7.8%,meeting practical application requirements.This study provides valuable insights into the efficient analysis and determination of trace polar contaminants in real samples.展开更多
文摘It has been estimated that between 94 million and 220 million people around the world are at risk of consuming drinking water that contain arsenic concentrations higher than 10μg/L(Podgorski and Berg,2020).
基金the National Nature Science Foundation of China(Nos.21775113 and 21974100)the Science Fund for Creative Research Groups of NSFC(No.20921062)。
文摘The difficulty in achieving high removal efficiency for contaminants in textile wastewater over a wide range of p H impedes the progress of its treatment technique greatly.Herein,a facile and sustainable strategy was adopted for constructing magnetic ordered mesoporous polymers(M-OMPs)without the assistance of organic solvent and catalyst.The prepared M-OMPs were endowed with high special surface area and good superparamagnetism simultaneously,and exhibited high removal efficiency(>99%)for Methylene Blue(MB)within a short time(10 min)at a concentration of 50 mg/L.What’s more,high removal efficiency was achieved over a wide range of p H 2-12 and the adsorption capacity for MB on M-OMPs was substantially retained even after 5 adsorption-desorption cycles,further demonstrating the application potential of M-OMPs in the decontamination of textile wastewater.
基金financially supported by Hubei Provincial Key Science and Technology Program(YFXM2021000240)。
文摘Covalent organic frameworks(COFs)have been widely used to prepare solid-phase microextraction(SPME)coatings due to their large specific surface area and adjustable pore size.However,the weak inherent hydrophilicity of COFs restricts their extraction performance for polar phenolic compounds.In this work,COFs were combined with chitosan(CS)via Schiff base reaction to prepare novel SPME coating materials.The incorporation of CS,which contains abundant hydrophilic functional groups,eff ectively enhanced the hydrophilicity of the CS/COF composite,thus boosting its interaction affinity towards polar phenols.In combination with gas chromatography—mass spectrometry(GC–MS),an efficient and sensitive analytical method was established.Under optimal conditions,the developed method demonstrated a broad linear range(5.0–1.0×10^(4)ng/L,R^(2)>0.9972),low detection limits(0.78–1.3 ng/L),good reproducibility(relative standard deviations(RSDs)<8.8%),and excellent enrichment factors(5993–41,441).Moreover,the established method was successfully applied to quantify phenolic compounds in grapes,and the recoveries ranged from 92.2%to 111%with RSDs of 2.3%–7.8%,meeting practical application requirements.This study provides valuable insights into the efficient analysis and determination of trace polar contaminants in real samples.
