Design of Bismuth Tungstate BiWO Photocatalyst for Enhanced and Environmentally Friendly Organic Pollutant Degradation.

In this study, a chemical precipitation approach was adopted to produce a photocatalyst based on bismuth tungstate BiWO for enhanced and environmentally friendly organic pollutant degradation. Various tools such as X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), optical spectroscopy and X-ray photoelectron spectroscopy, were employed to assess the structural and morphological properties. Hence, the XRD profiles showed a well crystallized BiWO orthorhombic phase.

Removal of cadmium and lead ions from aqueous solutions by novel dolomite-quartz@FeO nanocomposite fabricated as nanoadsorbent.

The elimination of heavy metal ion contaminants from residual waters is critical to protect humans and the environment. The natural clay (dolomite and quartz) based composite FeO nanoparticles (DQ@FeO) has been largely explored for this purpose. Experimental variables such as temperature, pH, heavy metal concentration, DQ@FeO dose, and contact time were optimized in details.

Multifunctional cobalt oxide nanocomposites for efficient removal of heavy metals from aqueous solutions.

In this study, co-precipitation synthesis of natural clay (NC) with CoO nanoparticles (NPs) is carried out to elaborate the super NC@CoO nanocomposites with admirable salinity confrontation, environmental stability and reusability, to eliminate heavy metal pollution such as toxic Pb(II) and Cd(II) ions. The advantages of using the NC@CoO adsorbent are easy synthesis and biocompatibility. In addition, NC@CoO can keep an excellent adsorption capacity by taking into account various environmental parameters such as the pH solution, NC@CoO dose, adsorption process time and the initial heavy metals concentration.

Green synthesis of AgO nanoparticles using Punica granatum leaf extract for sulfamethoxazole antibiotic adsorption: characterization, experimental study, modeling, and DFT calculation.

Silver oxide (AgO) nanoparticles (NPs) were generated by synthesizing green leaf extract of Punica granatum, and afterwards they were used as adsorbent to remove the antibiotic additive sulfamethoxazole (SMX) from aqueous solutions. Prior of their use as adsorbent, the AgO NPs were characterized by various methods such as X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), scanning electron microscopy/energy-dispersive X-ray (SEM-EDX), and transmission electron microscopy (TEM). The AgO NPs were found to be spherically shaped and stabilized by the constituents of the extract.

Biosynthesis of SiO nanoparticles using extract of Nerium oleander leaves for the removal of tetracycline antibiotic.

Tetracycline (TC) is one of the antibiotics that is found in wastewaters. TC is toxic, carcinogenic, and teratogenic. In this study, the tetracycline was removed from water by adsorption using dioxide silicon nanoparticles (SiO NPs) biosynthesized from the extract of Nerium oleander leaves.

Engineering of amine-based binding chemistry on functionalized graphene oxide/alginate hybrids for simultaneous and efficient removal of trace heavy metals: Towards drinking water.

Engineering of versatile binding chemistry on graphene oxide surface using nucleophilic substitution/amidation reactions for highly efficient adsorption of Cd (II), Cu (II) and Pb (II) is herein proposed. Graphene oxide (GO) was used as a precursor for covalent bonding of hexamethylenediamine (HMDA) molecules via the nucleophilic substitution/amidation reactions on epoxy (COC) and carboxyl (COOH) groups to yield hexamethylenediamine functionalized graphene oxide (GO-HMDA) with multiple binding chemistries such as oxygen and nitrogen. Afterwards, GO-HMDA was encapsulated in alginate hydrogel beads with different loadings 5, 10, 15 and 20 wt% to produce Alg/GO-HMDA hybrid adsorbents for the removal of trace heavy metal ions from aqueous solution.

New amino group functionalized porous carbon for strong chelation ability towards toxic heavy metals.

Herein, ethylenediamine functionalized porous carbon (PC-ED/1.5) was synthesized, then characterized by various methods and finally used as a functional material for Cu(ii) and Pb(ii) ion removal from water. XPS revealed the presence of numerous functionalities within the surface of PC including -NH and C-N-C groups.

Correction: Microwave assisted green synthesis of FeO/biochar for ultrasonic removal of nonsteroidal anti-inflammatory pharmaceuticals.

[This corrects the article DOI: 10.1039/D0RA00617C.].

Microwave assisted green synthesis of FeO/biochar for ultrasonic removal of nonsteroidal anti-inflammatory pharmaceuticals.

Iron oxide/biochar (FeO/biochar) was prepared by green synthesis a microwave to evaluate ultrasound-assisted adsorption capacity of Nonsteroidal Anti-inflammatory Drugs (NSAIDs) (salicylic acid, naproxen, and ketoprofen) from the water. Several techniques of characterization, including, Fourier transform infrared spectrometry, scanning electron microscopy, EDS analysis, N adsorption-desorption, X-ray diffraction, and Raman spectrometry were applied. The adsorption of NSAIDs onto FeO/biochar was performed using an ultrasonic bath.

High extent mass recovery of alginate hydrogel beads network based on immobilized bio-sourced porous carbon@FeO-NPs for organic pollutants uptake.

This work goes inside the understanding of organic pollutants adsorption mechanism over network alginate hydrogel beads based on immobilized bio-sourced PC@FeO-NPs (PC@FeO-NPs@Alginate) and highlights its high extent mass recovery in aqueous media. The samples were successfully synthesized, we previously developed porous carbon (PC), which, was used to elaborate PC@FeO-NPs via simple in situ coprecipitation (PC@ FeO-NPs), which was encapsulated by alginate-Ca via the blend crosslinking method. The structural, textural, chemical and morphological proprieties of as prepared materials were studied by XRD, FTIR, Raman spectroscopy, nitrogen adsorption-desorption, XPS, SEM and TEM.

Combined Methane Energy Recovery and Toxic Dye Removal by Porous Carbon Derived from Anaerobically Modified Digestate.

Valorization of agri-food organic waste in order to reach zero waste using cleaner methods is still a challenge. Therefore, both anaerobic co-digestion (ACD) (biological process) and adsorption (physicochemical process) were used in combination for this objective. ACD allows the activation of biodegradable organic matter by microbial action and produces a digestate (co-product).

Core-shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer.

The overall goal of this work was to activate agri-food wastes by microbial action, which makes it possible to produce bio-digestate and energy (methane). The resulting bio-digestate could be transformed to porous carbon (PC), which was used for the preparation of core-shell particles with alginate (bio-polymer) and a calcium ion layer. Furthermore, surface charge measurements showed electrostatic attractions occurring between the alginate, calcium (Ca) ions and the PC, hence leading to the formation of core (PC)-shell (alginate-calcium ions) particles.