Adsorption and recognition properties of ionic imprinted polyamine IIP‐PEI/SiO₂ towards Pb²⁺ ion

Abstract

In this article, an ionic imprinted polyamine (IIP) grafted on the surface of silica gel was prepared through a new surface imprinting approach. The adsorption and recognition properties of IIP-PEI/SiO 2 for Pb 2þ ion were studied in detail using batch rebinding studies. The experimental results showed that the IIP-PEI/ SiO 2 had high affinity, specificity, and selectivity for the template ion. The isothermal adsorption data was fit using the Langmuir equation. The adsorption was typical of chemisorption of a monolayer. The selectivity coefficients relative to Zn 2þ and Cr 3þ were 32.43 and 68.36, respectively. pH and temperature were found to have a strong influence on the adsorption properties. The adsorption amount increases with rising of temperature and the value of DH is plus. The adsorption of Pb 2þ by IIP-PEI/SiO 2 was spontaneous and endothermic. At pH ¼ 7, the adsorption capacity of the polymers was the highest.

Synthesis, characterization, and Pb2+ ion sensing application of hexa‐armed dansyl end‐capped poly(ε‐caprolactone) star polymer with phosphazene core

“…28 Chen and coworkers prepared dansyl-functional peptidocalix [4]arene fluorescence chemosensor for the selective detection of fluoride ions. synthesized dansyl-functional cholate foldamers for the selective fluorescence detection of Hg 21 ions.…”

“…[1][2][3][4] The accumulation of the heavy metals in the ecosystem majorly occurs via industrial processes. While some of them are highly toxic for human health, such as lead and mercury, some others are among the essential micronutrients for animals and plants.…”

Selective Separation and Analysis of Pb(II) Using a New Surface Imprinted Multi-Walled Carbon Nanotubes Combined with AAS

“…Soil and water pollution, caused by toxic heavy metals, is a major environmental concern [1]. Among toxic heavy elements, lead is one of the commonest for animals and humans, even at lower concentrations [2,3]. Unlike organic compounds, lead is non-biodegradable and accumulative through its interaction with inorganic and organic materials, including adsorption, formation of complexes and chemical combinations etc.…”

“…Silica gel [13,14] and MCNTs [15] are ideal supports for organic groups. There are some reports about the enrichment and separation of Pb(II), using SIT with silica gel as the support [2,3,6]. However, there is few report on the synthesis of IMCNTs for Pb(II) extraction.…”

Material and flow engineering approach in improving the membrane distillation process

“…The amine group being one of the most versatile functional groups in organic chemistry [53,54], the presence of such groups on the NPs allows for them to be used as base catalysts [54] (in place of liquid molecular base catalyst which are difficult to recover and corrosive [55]), be quaternized to yield polymers with different solubility [54], and function as binding ligands to different metals [50,51,54,[56][57][58][59]. Of which, the function of binding specific metals might prove to be interesting in targeting toxic or valuable metal ions for valuable metal recovery [42], hydrological mining wastewater treatment [50] degradation in oil wastewater treatment, absorption of toxic metal ions, or carbon capture and fixation in flue gas treatment.…”