Biocomposite hydrogel beads from glutaraldehyde-crosslinked phytochemicals in alginate for effective removal of methylene blue

TiO2/guar gum hydrogel composite for adsorption and photodegradation of methylene blue

“…In addition, dyes are known to have mutagenic and carcinogenic properties that can harm the surrounding biota. Dyes are also known to increase the levels of chemical oxygen demand (COD) compounds which can dramatically reduce dissolved oxygen levels in water [6][7][8][9][10].…”

“…Azo dyes are the highly utilized dyes for the textile coloring processes. However, less than 50% of the dye molecules are bound to the textiles, and the remainder is discharged as wastewater [9,11,12]. Often, these dye-contaminated wastewaters were directly discharged to water bodies without any pretreatment [4] or utilized for irrigating agricultural fields [13].…”

Investigation of the influence of crosslinking activation methods on the physicochemical and Cu(II) adsorption characteristics of cellulose hydrogels

“…7d. This phenomenon occurs since there are more adsorbate molecules at higher concentrations but a similar number of active adsorption sites; thus, the adsorption sites tend to be saturated faster, and their adsorptivity decreases [57].…”

“…where k IPD is the rate constant corresponding to a specific segment n (with n = 1, 2, or 3) and C i is an arbitrary constant related to the boundary layer effect [57,64]. All the kinetic parameters above were obtained by a nonlinear least-squares method using SigmaPlot 12 software package (Systat Software, Inc.) and the corresponding parameter values obtained upon fitting are reported in Table 4.…”

Structure and Adsorption Performance of Cationic Entermorpha prolifera Polysaccharide-Based Hydrogel for Typical Pollutants: Methylene Blue, Cefuroxime, and Cr (VI)

“…In general, raw material selection for adsorption materials is based on the principles of natural origin, availability, economic feasibility, and modifiability. Meanwhile, the porosity of adsorbents is one of the main factors determining the adsorption capacity of adsorbents [ 13 , 14 ]. The adsorbent with a porous structure has a large surface area, which can provide enough binding sites for pollution molecules [ 15 , 16 ].…”