2.上海市农业科学院生态环境保护研究所,上海 201403
1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
2.Institute of Eco-Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
-MIL-101对6-氯烟酸、啶虫脒、噻虫胺、吡虫啉、噻虫嗪的去除率优于MIL-101,最高可达86%、92%、30%、63%、47%,且20 min内可达到吸附平衡;π-π作用和分子空间位阻的不同导致NH
-MIL-101对NNIs的吸附符合Langmuir模型和准二级动力学模型,具有良好的吸附效果,且能够重复利用5次,在NNIs的水处理中具有应用价值。
To effectively remove neonicotinoid insecticides (NNIs) in water, aminated metal organic frameworks (NH
-MIL-101) was synthesized by hydrothermal method in this study. Based on the physicochemical properties of the synthesized materials and their sorption performance for NNIs, the removal mechanism of NNIs in water by NH
-MIL-101 was explored. The results showed that the removal rates of 6-chlorniacin, acetaminidine, thiamethylamine, imidacloprid and thiamethoxam NNIs by NH
-MIL-101 were higher than those by MIL-101. The highest removal rates were 86%, 92%, 30%, 63% and 47% for 6-chlorniacin, acetaminidine, thiamethylamine, imidacloprid and thiamethoxam, respectively, and the adsorption equilibrium could be achieved within 20 min. The differences of π-π interaction and molecular steric hindrance resulted in the different removal rates of various NNIs by NH
-MIL-101. In general, good removal effect occurred at pHs 3~7, though the optimal pH was different for specific NNI. The coexisting anions of Cl
) had a significant inhibitory effect on the removal of these NNIs. In conclusion, Langmuir model and the quasi-second-order kinetic model had a good fitting for the sorption process of NNIs by NH
-MIL-101 with good adsorption effects, and the material could be reused for 5 times. Therefore, NH
-MIL-101 can be a promising material for application in NNIs-containing water treatment.
.
Nitrogen adsorption-desorption isotherms and pore size distributions of MIL-101 and NH
-MIL-101对NNIs的单标溶液和混标溶液的去除率对比
Comparison of NNIs removal rates between single-solute and mixed-solute solution systems
-MIL-101 dosage on NNIs sorption
-MIL-101 sorption property
-MIL-101吸附NNIs准一级动力学与准二级动力学拟合
Pseudo-first order and pseudo-second order kinetic fittings of NNIs sorption by NH
-MIL-101的再生次数对NNIs去除率的影响
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