Removal of bisphenol, using antimony nanoparticle multi-walled carbon nanotubes composite from aqueous solutions

This study focuses on preparing Antimony Nanoparticle Multi-walled Carbon (ANMWC) composite as an effective adsorbent and then the effect of produced composite in BPA removal from aqueous solutions was studied. ANMWC were prepared using chemical method and characterized with X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET). Moreover, the removal efficiency of prepared AMWCNT and Nanoparticle Multi-walled Carbon (MWCNT) in removal of Bisphenol A was investigated. Results revealed that the BPA removal efficiency by AMWCNT increased from 80 to 93 with the increase of contact time 5 to 60 min. The maximum removal efficiency for the both adsorbents was seen at pH 7, which was 85 for MWCNT and 95 for ANMWC composite. According to the results obtained, pHzpc for both adsorbents was 7. Results showed that the adsorption process followed the pseudo-first order model with a high correlation value and BPA adsorption on MWCNT followed the Langmuir isotherm model

Exploring the CP-violating Inert-Doublet Model

We have explored properties of an extension of the Inert Doublet Model by the addition of an extra non-inert scalar doublet. The model offers a possibility of CP violation in the scalar sector and a candidate for the Dark Matter. Allowed regions in the plane spanned by the mass of the Dark-Matter particle and the lightest neutral Higgs particle have been identified, and constraints from direct-detection experiments have been studied. For favorable parameter regions one may observe long-lived charged particles produced at the LHC

Oxidation of Phenol from Synthetic Wastewater by a Novel Advance Oxidation Process: Microwave-Assisted Periodate

267-272In this study, microwave (MW) was used to activate periodate as a novel advance oxidation process. The effects of a combined process of sodium Periodate and MW was studied in phenol removal from synthetic wastewater. Experiments were performed in a batch process, and the effect of parameters including pH, contact time, initial phenol concentration, MW radiation and Periodate concentration were examined. The maximum phenol removal equal to 98.8% was obtained at pH = 11, initial phenol concentration =100 mg/L, contact time=30 min, MW = 600 W and Periodate concentration = 0.2 mol/L. The maximum phenol removal was only 11.5 % at the same conditions but without the influence of MW radiation. The results revealed that as Periodate concentration, MW radiation and contact time increased, the phenol removal efficiency increased as well. Furthermore, when the phenol concentration increased, phenol removal efficiency decreased. It was also observed that MWs activated Periodate and significantly increased process efficiency. Therefore, the combined process of MW-Periodate can be used as a novel advanced oxidation process to remove contaminants from the aquatic environment

Kinetic and adsorption studies of reactive black 5 removal using multi -walled carbon nanotubes from aqueous solution

The removal of reactive black 5 (RB5) from aqueous solutions by adsorption onto multi-walled carbon nanotube (MWCNT) was studied. The effects of some operating parameters such as solution pH, initial dye concentration, adsorbent dosage and adsorption capacity on the adsorption of RB5 were investigated. It was found that RB5 removal by adsorption onto MWCNT was best achieved at natural pH. The adsorption efficiency of RB5 by MWCNT decreased with increasing initial dye concentration, while the increase of adsorbent dosage resulted in an increase of decolorization efficiency. The maximum adsorption capacity was reached at 36.2 mg/g after 90 min. The results obtained from kinetic studies reflected that RB5 removal fitted well with the second order model. Also, the isotherm data correlate well with the Freundlich model. The findings indicated that MWCNT can be used as a suitable adsorbent for removing dyes from wastewaters