Preparation of Pyridinium-Functionalized Magnetic Adsorbent and Its Application for Nitrate Removal from Aqueous Solution was written by Ma, F.;Du, H. T.;Wang, Q.;Li, R. H.;Zhang, Z. Q.. And the article was included in Water, Air, & Soil Pollution in 2015.Synthetic Route of C5H6ClN This article mentions the following:
A novel magnetic pyridinium-functionalized mesoporous silica adsorbent (Fe3O4@SiO2@Py-Cl) was synthesized for nitrate removal from aqueous solutions The adsorption performances were investigated by varying exptl. conditions such as pH, contact time, and initial concentration The adsorbent was characterized by transmission electron microscopy (TEM), XPS, Fourier transform IR (FT-IR) spectroscopy, and magnetic hysteresis loops. The results showed that the adsorption equilibrium could be reached within 30 min and the kinetic data were fitted well by pseudo-second-order and intra-particle diffusion model. The adsorbent exhibited a favorable performance, and its maximum adsorption capacity calculated by the Langmuir isotherm model was 1.755 mmol/g. The nitrate adsorption mechanism was mainly controlled by the material through ion exchange of nitrate with chloridion, as determined by XPS. This study indicated that this novel pyridinium-functionalized mesoporous material had excellent adsorption capacity. Meanwhile, compared with other adsorbents, it could remove nitrate fast and easy to be collected by magnetic separation, showing great potential application for nitrate removal from aqueous solution In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Synthetic Route of C5H6ClN).
Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six 锜?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H鐪塩kel criteria for aromatic systems. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Synthetic Route of C5H6ClN