Dye contamination in water is a serious environmental problem around the world. Erythrosine is a water-soluble xanthenes class of dye that widely used as colorant in many industries. Used cigarette filter ash loaded with Al/ Fe oxides was synthesized by a low-cost, simple, and environmentally benign procedure. The adsorbent was characterized by several methods including energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and Brunauer Emmet and Teller (BET) analysis. Then, the potential of used cigarette filter ash loaded with Al/ Fe oxides was investigated for adsorption of erythrosine. The effect of different parameters including contact time, pH, adsorbent dosage and initial dye concentration on the removal yield was studied. The experimental data were fitted well with the Langmuir isotherm model. Maximum monolayer adsorption capacity based on Langmuir isotherm is 32.68 mg g-1. The process for purifying water treatment presented here is clean and safe. Therefore, this adsorbent was considered to be applicable for managing water pollution caused by erythrosine. تفاصيل المقالة

Malicorium supported Ni0.5Zn0.5Fe2O4 magnetic nanoparticles were synthesized by a low-cost, simple,and environmentally benign procedure. The adsorbent was characterized by several methods includingX-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infraredspectroscopy (FT-IR). Then, the potential of malicorium supported Ni0.5Zn0.5Fe2O4 magneticnanoparticles was investigated for adsorption of Manganes (II). The effect of different parametersincluding contact time, pH, adsorbent dosage and initial Mn (II) concentration on the Mn (II) removalyield was studied. The experimental data were fitted well with the Langmuir isotherm model. Themaximum monolayer adsorption capacity based on Langmuir isotherm is90.91 mg g-1. The preparedmagnetic adsorbent can be well dispersed in the aqueous solution and easily separated from thesolution with the aid of an external magnet after adsorption. The process for purifying water treatmentpresented here is clean and safe using the magnetic nanoparticles. Therefore, this adsorbent wasconsidered to be applicable for managing water pollution caused by Mn (II) ions. تفاصيل المقالة

An atom-efficient, eco-friendly, solvent-free, high yielding, multicomponent green strategy to synthesize triazolo[1,2-a]indazole-triones derivatives by the one-pot condensation of aldehyde, dimedone, and phenyl urazole under microwave Irradiationis presented. Reactions catalyzed by A novel nanomagnetic organic-inorganic hybrid catalyst (Fe@Si-Gu-Prs) was prepared by the chemical anchoring of Preyssler heteropolyacid (H14[NaP5W30O110]) onto the surface of modified Fe3O4 magnetic nanoparticles with guanidine-propyl-trimethoxysilane linker. A series of different substituted aromatic aldehydes including either electron-withdrawing or electron-donating groups used in this reaction participated well and gave the corresponding products in good to excellent yield. In this method, catalyst was isolated and reused several times, at least four times without significant loss of activity. تفاصيل المقالة

In the study we reported synthesis of 2-aminothiophene derivatives in pure water using nano-structured Na2CaP2O7. Our results indicated that this heterogeneous catalyst performed good selectivity and catalytic activity in the synthesis of substituted 2- aminothiophene through Gewald reaction in water. The noticeable benefits of this procedure rely on several factors including: a simple method, mildness conditions, short time of reaction, operational simplicity and low cost. تفاصيل المقالة

< p>Mg-Fe bi-metal oxide was prepared and utilized as a magnetized renewable solid base catalyst for formation of 2-aminothiophenes by means of Gewald’s reaction. The prepared heterogeneous basic solid catalyst can be separated by a magnet and reused without considerable wastage in this activity. The structure of the aforementioned magnetized basic nano-catalyst was studied by XRD (X-ray diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), EDS (energy dispersive x-ray spectroscopy) and VSM (vibrating sample magnetometry) techniques. The present methodology offers several advantages such as high yields of products, shorter reaction times, environmentally friendly conditions, low catalyst dosage, high endurance and facile work-up. تفاصيل المقالة