Superfast adsorption and high-performance tailored membrane filtration by engineered Fe-Ni-Co nanocomposite for simultaneous removal of surface water pollutants

Modeling of parameters affecting the removal of chromium using polysulfone/graphene oxide membrane via response surface methodology

In this study, an efficient membrane composed of polysulfone and graphene oxide was developed and evaluated for its efficacy in chromium adsorption. Characterization of the synthesized membrane involved comprehensive analyses including scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FTIR) to assess its structural properties. Subsequently, the membrane's performance in removing chromium from aqueous solutions was scrutinized, considering key operational parameters. Response surface methodology (RSM) based on central composite design (CCD) was employed to optimize parameters. Additionally, the pH parameter revealed the most significant (F-value = 184.25) on the amount of chromium removal by the membrane process. The interaction between pH and contact time is the most significant among all interactions, with an F-value of 40.99. Moreover, the high R2 (97.58%) and adjusted R2 (95.41%) indicate the model effectively explains variance with minimal overfitting, confirming its strong predictive capability. Under optimized conditions (pH 5, initial concentration of 30 mg/L, and contact time of 40 min), the polysulfone/graphene oxide membrane exhibited an impressive removal efficiency of 81.1%. This study highlights the potential of polysulfone/graphene oxide membranes in effectively separating chromium from aqueous mediums, thereby suggesting a promising avenue for future research in addressing heavy metal pollution.√.

An Updated Overview of Magnetic Composites for Water Decontamination

Water contamination by harmful organic and inorganic compounds seriously burdens human health and aquatic life. A series of conventional water purification methods can be employed, yet they come with certain disadvantages, including resulting sludge or solid waste, incomplete treatment process, and high costs. To overcome these limitations, attention has been drawn to nanotechnology for fabricating better-performing adsorbents for contaminant removal. In particular, magnetic nanostructures hold promise for water decontamination applications, benefiting from easy removal from aqueous solutions. In this respect, numerous researchers worldwide have reported incorporating magnetic particles into many composite materials. Therefore, this review aims to present the newest advancements in the field of magnetic composites for water decontamination, describing the appealing properties of a series of base materials and including the results of the most recent studies. In more detail, carbon-, polymer-, hydrogel-, aerogel-, silica-, clay-, biochar-, metal-organic framework-, and covalent organic framework-based magnetic composites are overviewed, which have displayed promising adsorption capacity for industrial pollutants.