The rapid proliferation and intensive use of electronic devices have led to an increase in electronic pollution, such as electronic noise, electromagnetic interference (EMI), and radiofrequency interference (RFI), which cause malfunctions of electronic devices. The emergence of flexible polymer composites has a remarkable potential for electromagnetic shielding depending on their unique characteristics, such as their electrical, thermal, mechanical, and magnetic properties, which are very useful for suppressing electromagnetic noise. Graphene (G) and its composites can serve as better shielding materials against these interferences due to their lightweight and high corrosion resistance. Researchers are still grappling with the need for flexible and scalable smart composite materials to prevent radioactive pollution from electronic devices. The inclusion of next-generation graphene (G) conductive fillers loaded with polyvinyl chloride (PVC) /graphene is the subject of our current research (G). Due to the absorption-dominated shielding process, the composite has an extraordinarily low percolation threshold and a high shielding efficiency (SE) against electromagnetic interference (EMI).The distribution and dispersion patterns of graphene particles in the matrix phase were validated by SEM electron micrographs. The composite, which contains just 40% graphene by weight, has an EMI SE value of 26 dB in the frequency range of 10 to 15 GHz and is only 2 mm thick.In this case, we believe that promoting a scalable and industrially viable G/PVC composite, which is a novel and strong candidate in the burgeoning field of high-stress electromagnetic shielding applications in the future, is the best option.

In this work, the adsorption of basic fuchsine largely used in industries was studied by Zn/Al-HDL intercalated with diamino-dodecylphosphonic acid (DDPA). The physicochemical characteristics of Zn/Al-DDPA were evaluated by Brunauer–Emmett–Teller method, Fourier transform infrared spectroscopy, X-ray diffraction, and the elementary analysis to determine the rate of grafting. The effect of concentration of fuchsine, reaction times, ionic strength effect and the effect of the temperature were studied. The thermodynamic and kinetic studies were carried out and the results confirmed that all adsorption processes were spontaneous and thermodynamically favorable and that the adsorbent is reusable after three steps of desorption. The best uptake in this study was 90%.

This work is focused on the selectivity of the elimination of cadmium (II) and lead (II) by novel hybrid material which has been synthesized and characterized previously (Zn/Al-DDPA). This study has obliged us to highlight the effect of equilibrium time, effect of concentration of pollutants, effect of the amount of the adsorbent and the effect of adding salts. Thermodynamic study confirms that the adsorption process is exothermic and spontaneous process with a disorder between the two phases and that the adsorbent is reusable after three steps of desorption. The best extraction yield for this study is more than 70% for cadmium (II).

Amino phosphonic acids are good heavy metal extractants for liquid–liquid extraction, but this method requires the use of an organic solvent, which is itself a pollutant. The incorporation of these acids in solid supports gave us the opportunity to find a solution to this problem. The synthesis of the new material by incorporation of Amino-Cyclo-Hexyl Phosphonic Acid into the interlayer space of the Ni/Al-LDH, designated as Ni/Al-ACHPA, was carried out by the coprecipitation method and anion exchange. The new hybrid material was characterised by FTIR, XRD and BET. The results obtained show that ACHPA is well intercalated in LDH. The adsorption performance of the new hybrid material towards the ions of Cerium Ce⁺³, has been investigated under different parameters. Under optimal conditions, where the highest recovery (75%) was obtained at pH 6 using 0.1 g of adsorbent (Ni/Al-ACHPA) for less than 30 min of agitation. The modelling results of the kinetics indicate that the Ce⁺³ adsorption process mechanism is well fitted by a pseudo-second order equation with a high regression coefficient (R² = 99%) and the adsorption isotherms were fitting well with the Freundlich isotherm model.