Abstract
Functionalized elastomeric networks were obtained via a polycondensation reaction between poly(dimethylsiloxane) (PDMS) containing Si(CH3)2OH as end groups and an imidazole- or benzimidazole-modified alkoxysilane. The structure of the polymeric materials was characterized via attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and solid-state 13C and 29Si NMR spectroscopy, which indicated the presence of silsesquioxane units that acted as nodes on the PDMS chains and linked the functional groups. Thermogravimetric analysis (TGA) of the product indicated high thermal stability with an initial weight-loss temperature around 450 K. The capacity for the removal of copper(II) from aqueous solution was estimated from adsorption isotherms, yielding values of 35.74 and 66.09 mg g-1, respectively, for benzimidazole-and imidazole-functionalized materials. The major adsorption models were evaluated to fit the removal data of copper(II) and the model elaborated by Sips was determined to provide the best fit for both prepared materials.
Highlights
Toxic metal ions released into environmental water are a concern because they can be absorbed by plants and animals, thereby becoming concentrated in living organisms and altering the ecosystem.[1]
This study reports the preparation and application of a material based on PDMS that contains benzimidazole or imidazole at the network nodes
The first step was the functionalization of organosilane through exchanging the chlorine of (MeO)3Si(CH2)3Cl with benzimidazole or imidazole molecules
Summary
Toxic metal ions released into environmental water are a concern because they can be absorbed by plants and animals, thereby becoming concentrated in living organisms and altering the ecosystem.[1] The treatment of effluents that contain low concentrations (ppm) of heavy metals is important for promoting water reuse. Various methods, including chemical precipitation, ion exchange, adsorption, membrane filtration, and electrochemical treatment technologies, are currently used to treat such waste prior to discharge.[2,3]. As described in several studies, adsorption is recognized as an effective and economic method of heavy-metal removal that offers flexible operation and has the potential to achieve a high-purity effluent. Some adsorbent materials can be regenerated via desorption processes, thereby increasing the economic viability of this approach.[3] To remove contaminants of this type from various effluents, the study/development of new
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
