Dichlorido(6,6′-dimethyl-2,2′-bipyridine-κ2 N,N′)cobalt(II)

In the title compound, [CoCl2(C12H12N2)], the CoII atom is four-coordinated in a distorted tetra­hedral geometry by two N atoms from a 6,6′-dimethyl-2,2′-bipyridine ligand and two terminal Cl atoms. Inter­molecular C—H⋯Cl hydrogen bonds and π–π stacking inter­actions between the pyridine rings [centroid–centroid distances = 3.788 (1) and 3.957 (1) Å] are present in the crystal structure

Systematic Design for Optimizing the Removal of Taste and Odor-Causing Algae from Drinking Water using PEBA/CDs Polymeric Nanoadsorbents

Cyclodextrin (CDs)/polyether black amide (PEBA) polymeric nanostructures are of particular practical importance due to their nature including porosity, biocompatibility and biodegradability as new polymeric nanocomposites. The aim of this research work was to optimize the odour and taste causing algae in drinking water using PEBA/CDs nanoadsorbents. The design of experiments and the effect of experimental parameters on the rate of algae removal was done systematically by Fractional Factorial method. RSM optimization method was used to achieve the highest algae removal performance. FTIR spectroscopy, SEM images, BET technique and mapping analysis were used to characterize these nanostructures. These analyzes showed that the nanoadsorbents synthesized had ideal properties such as homogeneous morphology and fiber size distribution in the nanometer range. In addition, according to data obtained from BET technique, the surface area of the sample was about 840 m2/g. The results of studies on Navicula algae showed that PEBA/CDs polymeric nanoadsorbents can affect the quality of drinking water by reducing the number of algae colonies to 5 colonies. The results of analysis of variance showed that the parameters of dose of polymeric nanoadsorbents, water volume and contact time (Pvalue = 0.000) affect the rate of algal removal. The results showed a reduction in the number of algae colonies by 3 colonies. The use of novel nanostructures as well as the systematic studies used in this study can be used as a new strategy to improve the quality of drinking water

(6,6′-Dimethyl-2,2′-bipyridine-κ2 N,N′)diiodidomercury(II)

In the title complex, [HgI2(C12H12N2)], the HgII atom has a distorted tetra­hedral coordination formed by two N atoms of the 6,6′-dimethyl-2,2′-bipyridine ligand and two terminal I atoms [N—Hg—N = 70.1 (2) and I—Hg—I = 130.59 (3)°]. The crystal packing features π–π contacts between the pyridine rings of adjacent mol­ecules [centroid–centroid distance = 3.773 (5) Å] and also between a pyridine ring of one mol­ecule and the five-membered chelate ring of an adjacent mol­ecule [centroid–centroid distance = 3.668 (4) Å]

(2,2′-Biquinoline-κ2 N,N′)dibromido­zinc(II)

In the title compound, [ZnBr2(C18H12N2)], the ZnII atom is four-coordinated in a distorted tetra­hedral configuration by two N atoms from the 2,2′-biquinoline ligand and two terminal Br atoms. The crystal packing is stabilized by weak inter­molecular C—H⋯Br hydrogen bonds and extensive inter­molecular π–π contacts between the pyridine and benzene rings [centroid–centroid distances = 3.775 (4), 3.748 (4), 3.735 (4), 3.538 (4), 3.678 (4) and 3.513 (4) Å]

Dichlorido(2,9-dimethyl-1,10-phenanthroline-κ2 N,N′)cobalt(II)

In the title compound, [CoCl2(C14H12N2)], the CoII atom is four-coordinated in a distorted tetra­hedral geometry by two N atoms from a 2,9-dimethyl-1,10-phenanthroline ligand and two Cl atoms. The Co atom and the phenanthroline unit are located on a mirror plane. The methyl H atoms are disordered about the mirror plane and areeach half-occupied. In the crystal structure, π–π inter­actions between the pyridine and benzene rings and between the pyridine rings [centroid–centroid distances = 3.8821 (9) and 3.9502 (10) Å, respectively] stabilize the structure

Kinetics and isotherm investigation of adsorption process of nickel oxide nanoparticles in edible dye removal from industrial effluent

In this study, nickel oxide nanoparticles was prepared by co-precipitation method and characterized using FT-IR, XRD, VSM and SEM techniques. By Fourier transform infrared FT-IR has proven bond forming of NiO in nickel oxide. . X-ray diffraction (XRD) showed that the single-phase sample had a cubic symmetry with a particle size of 57 nm. Nickel oxide nanoparticles can be prepared as an efficient adsorbent for the removal of food color in aqueous solution. The highest removal percentage of food color, was in pH=7 and it‌,s concentration was 15 ppm. The obtained experimental data in optimum condition was used to model the behavior of absorption in isotherms equations such as: Langmuir, Freundlich, Langmuir-Freundlich and Toth. An examination of the Langmuer isotherm (R2=0.980) showed that the absorption of food color on the adsorbent surface was monolithic and uniform. The kinetics of adsorption interactions were examined. The obtained results showed that the adsorption data has the most conformity with, pseudo-second-order model

Synthesis and characterization of nickel nanoparticle oxides and application in absorbance of Aluminon

In this study, nickel oxide nanoparticles was prepared by co-precipitation method and used as potential adsorbent for the removal of Aluminon from aqueous solution on a laboratory scale. Samples characterized using Fourier transform infrared spectrophotometry (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDX). By Fourier transform infrared FT-IR has proven bond forming of NiO in nickel oxide. X-ray diffraction pattern (XRD) show that nanoparticles have single phase in cubic crystalline network. The size of the nanoparticles is about 57 nm. UV-VIS show that the compound can be used as an efficient Adsorbent for the removal of Aluminon in Aqueous solution. The highest efficiency accrued in 5 ppm solution and pH=3. The Obtained empirical data in optimum condition was used to model the behavior of absorption in five isotherm equations such as: Langmuir, Freundlic –Langmuir, Toth and Khan. The adsorption data were fitted well to the Langmuier isotherm. The kinetics of adsorption interactions were examined with two adsorption mechanisms, pseudo-first-order, pseudo second-order. Result show that the adsorption data has the most conformity with, pseudo-second-order model