Efficient and reversible absorption of HCl gas by ChCl-based deep eutectic solvents-Insights into the absorption behavior and mechanism

Innovative formaldehyde adsorption with optimized deep eutectic solvents: An experiment and multilevel computational chemistry approach

Formaldehyde, a hazardous gas that is exposed to everyone every day, has been proven to pose an elevated risk of respiratory problems, allergies, and chronic diseases. Adsorption technologies have proven to be a straightforward and labor-saving method to reduce indoor formaldehyde levels. Currently, extensive research has been conducted utilizing Deep Eutectic Solvents (DES) as adsorbents for harmful gases, yet the adsorption and conversion mechanisms for formaldehyde remain unclear. In this study, we highlighted the adsorption and transformation mechanisms of formaldehyde with DES employing quantum chemical and molecular dynamics calculations. Initially, thermodynamic software (CosmoTherm) was employed to calculate the logarithmic activity coefficients (LAC) of formaldehyde and determine the solid-liquid equilibrium (SLE) for 416 combinations of DES. On the basis of the eutectic point and LAC of DES, potential formaldehyde adsorbents were screened. In the second step, the DES screened out has a good formaldehyde adsorption capacity through the experiment. Finally, the reactive sites, reaction pathways, van der Waals interactions, and hydrogen bonds of DES of L-cysteine/diethanolamine (CYS-DEA) and formaldehyde were studied through a theoretical approach. This study comprehensively elucidates the screening of formaldehyde adsorbents, experimental adsorption, and adsorption mechanisms. Significantly shortens the development cycle of DES as formaldehyde adsorbents.

Uremic Toxins Elimination from Simulated Intestinal Serum with Mesoporous Silica Nanoparticles Coupled with Molecularly Imprinted Polymers and Amino Linker

BACKGROUND

One of the most researched issues is the elimination of uremic toxins from the human body. These toxins can build up and lead to catastrophic issues including renal failure. To get rid of them, absorbents like activated carbon, zeolites, and other minerals are frequently utilized.

METHODS

Mesoporous silica nanoparticles functionalized with (3-Aminopropyl) triethoxysilane (APTES) linker (MSN-NH2) and mesoporous silica nanoparticles grafted with molecularly imprinted polymers (MSN-MIP) from the previous study were examined in this study to determine how well they absorbed urea, creatinine, and uric acid in a simulated intestinal serum.

RESULTS

MSN-MIP's large surface area (879.12 (m2/g)) and volume of pores (0.8475 (cm3/g)) made removal results that were satisfactory in the simulated serum. Additionally, MSN-MIP demonstrated a high urea adsorption capacity (qm = 1836.45 mg/g). Creatinine (qm = 1529.5 mg/g) and uric acid (qm = 1210.6 mg/g) were absorbed via NH-MSN2, which demonstrated a noticeable potential for absorption. The results of cell viability test for the first 72 hours, showed that the use of these absorbents in hemodialysis systems is acceptable.

CONCLUSION

Synthesized adsorbents can be utilized in the hemodialysis system since the results of the cell viability test also showed that the percentage of cell viability was extremely high up to 72 hours.

Rational design of efficient deep eutectic solvents for HCl absorption through their competitive H-bonding interactions

The high reversible solubility of HCl in BmimCl-TAA depends on its competitive hydrogen bond interactions and dynamic structural changes.