YANGChun,WANG Han,WANGQi,et al.Amino-modified Magnetic Mesoporous Silica for Adsorption of Sulfonamide Antibiotics[J].China Water & Wastewater,2022,38(23):123-128.
Amino-modified Magnetic Mesoporous Silica for Adsorption of Sulfonamide Antibiotics
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第23期
Page:
123-128
Column:
Date of publication:
2022-12-01
- Abstract:
- To improve the adsorption performance of mesoporous silicon materials, the physicochemical properties of sulfonamide antibiotics (SAs) were analyzed to guide the organic functional modification of mesoporous silicon materials, and amino-modified magnetic mesoporous silica (AMS) was prepared to systematically investigate its performance for sulfonamide antibiotics adsorption. Compared with common adsorbents, AMS showed higher adsorption capacity and efficiency for SAs, and its maximum adsorption capacities for sulfadiazine (SDZ), sulfamethoxine (SMD) and sulfamethoxazole (SMZ) were 272.39 mg/g, 228.44 mg/g and 300.14 mg/g, respectively. The adsorption process followed the pseudo-second-order kinetic model and Langmuir isotherm, and the removal rates of the above three antibiotics reached more than 90% within 10 min. When pH was 8, AMS reached the maximum adsorption capacity, and the adsorption capacity was negatively correlated with the ionic strength of the solution. The recovered AMS was stable and easy to be separated from the solution. The adsorption of SDZ, SMD and SMZ by AMS was mainly achieved through electrostatic attraction and hydrogen bonding.
Last Update:
2022-12-01