Shapeable amino-functionalized sodium alginate aerogel for high-performance adsorption of Cr(VI) and Cd(II): Experimental and theoretical investigations

Synthesis of Pd–AuAg trimetal nanohybrids with controlled heterostructures and their application in the continuous flow catalytic reduction of Cr(vi)

“…94 Another noteworthy spectral feature is the presence of peaks at 1590 and 1415 cm −1 , which represent the asymmetric and symmetric stretching vibrations of –COO–, respectively. 95 The peak observed at 1024 cm −1 is attributed to the stretching vibrations of C–O bonds present in the hydrogel. The FT-IR spectrum of GO shows several defining peaks, including O–H stretching vibrations at 3292 cm −1 , CO vibrations at 1713 cm −1 , CC stretching vibrations at 1589 cm −1 , and alkoxy C–O vibrations at 1038 cm −1 .…”

Potential mediated electrochemical recycling and sensing of cadmium ions in wastewater over ZnO/SA-g-PPy biocomposite

“…26,27 Wang et al have demonstrated a processable hydrogel of sodium alginate composite for efficient adsorption due to the evolution of abundant adsorption sites along with compressibility. 28 The indigenous and induced electrointeractive nature of structurally engineered sodium alginate has been reported for sensing cadmium ions with limited features like sensing range and detection limits but confirms the potential of this valuable polymer structure. 29,30 Therefore, along the lines of the above developments, in the present study, efforts are made to develop a chemically engineered sodium alginate composite for improved interactivity towards cadmium ions to prepare a portable potentiometric sensor offering recycling of cadmium ions with 81% extractability for up to 19 cycles.…”

Removal of Chromium Species by Adsorption: Fundamental Principles, Newly Developed Adsorbents and Future Perspectives

“…A 3D honeycomb-like eco-friendly PEI/sodium alginate (SA) aerogel can be fabricated via a one-step freeze-drying procedure. Due to the excellent compressibility and plentiful active adsorption sites, the fast and highly efficient adsorption of Cr(VI) (678.67 mg/g) could be obtained [ 178 , 179 ]. Based on a similar principle, a design of functionalized cellulose-based aerogel beads (CGP) was performed, and the simultaneous and adsorption, reduction and elimination of Cr(VI) could be efficiently implemented [ 180 ].…”

“…Taking full advantage of the surface electrostatic adsorption, chelation, ion-exchanging and reduction effects, newly developed adsorbents would possess relatively higher adsorption capacities and a faster adsorption rate toward Cr species [ 178 ]. The enhanced removal efficiency for Cr(VI) by MCDI might be attributed to ion adsorption, redox reaction of Cr(VI) into Cr(III) and precipitation effects [ 204 ].…”