Geopolymer Concrete Production by Activating Alkaline With Silica Sand, Blast Furnace Slag and Fly Ash

In this paper, it was aimed to manufacture a functional geopolymer structure by activating silica sand, fly ash disposed from Afsin-Elbistan Thermal Power Plant and blast furnace slag obtained from Iskenderun Ferrous & Steel Plant with NaOH. Concrete mortars containing alkaline-activated aggregates were shaped in 4 cm x 4 cm x 16 cm and 10 cm x 10cm x 10 cm molds. These samples were kept in oven at 75 oC during 20 hours. Bending resistance, specific weight, thermal conductivity coefficient, compressive strength and ultrasound transmission rate of each sample were measured

2-[(E)-(2,4-Dihy­droxy­benzyl­idene)aza­nium­yl]-3-phenyl­propano­ate

The title compound, C16H15NO4, exists as a zwitterion in the solid state, with the carb­oxy­lic acid group being deprotonated and the imine N atom being protonated. The mol­ecule adopts an E configuration about the C=N double bond. The dihedral angle between the benzene rings is 46.34 (4)°. An intra­molecular N—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, adjacent mol­ecules are connected by inter­molecular O—H⋯O and C—H⋯O hydrogen bonds, forming supra­molecular ribbons along the a axis

[N,N′-Bis(2,3,4-trimethoxybenzylidene)ethane-1,2-diamine-κ2N,N′]dibromidomercury(II)

In the title compound, [HgBr2(C22H28N2O6)], the HgII ion is bonded to two Br− ions and two N atoms of the chelating Schiff base ligand in a distorted tetrahedral geometry. The Schiff base ligand adopts an E,E conformation. The dihedral angle between the planes of the two halves of the central N,N′-dimethylethylenediamine part of the ligand is 2.3 (11)°. The crystal studied was twinned by pseudomerohedry [twin law (0-10/-100/00-1)]; the contribution of the minor twin component refined to 0.208 (3)

Evaluation of textile wastewater treatment in sequential anaerobic moving bed bioreactor - aerobic membrane bioreactor

In this study, the treatability of real textile wastewater [dissolved organic carbon (DOC): 500 mg/L), color: 6383 Pt-Co, sulfate: 362 mg/L)] was investigated in sequential anaerobic moving bed bioreactor (AnMBBR) and aerobic membrane bioreactor (AeMBR). AnMBBR was filled with 40 % career material (Kaldnes K1). The effect of different hydraulic retention times (HRTs) (6−48 h) and powdered activated carbon (PAC) addition (1 g/L) was investigated for system optimization. Sequential AnMBBR- AeMBR was successfully operated for textile wastewater treatment corresponding to 92 %, and 90 % dissolved organic carbon (DOC) and color removals, respectively. The effluent quality, dropped under 45 Pt-Co and 18 mg/L effluent values, was relatively high and complianted with discharge standards. The Fourier transform infrared spectroscopy (FT-IR) analysis showed that primary amines are successfully removed in AeMBR effluent. Fouling in AeMBR was increased when HRT was reduced, however, improved by 90 % at PAC addition conditions. Except for soluble microbial products (SMP) and soluble extracellular polymeric substances (EPS), it was observed that silicon (Si) (13.16 %) has an important role in fouling which was confirmed by scanning electron microscopy (SEM) and Energy-Dispersive X-ray (EDX) analysis. Additionally, microbial community structures indicated that the membrane fouling can be caused by Alphaproteobacteria (80 %) which was the dominant culture in the biofilm layer at a maximum fouling rate.This work was funded by the Scientific Research Project Coordination Unit of Kahramanmaras Sutcu Imam University (Project No: 2016/6-41 YLS)

Synthesis and spectrophotometric investigation of a new vic-dioxime ligand and its transition metal complexes

A new vic-dioxime ligand and its Cu(II), Co(II), Ni(II), Pd(II), VO(IV) and Zn(II) complexes have been prepared and characterized by elemental analyses, infrared, electronic spectra, magnetic moment and molar conductance data. The Ni(II), Pd(II) and Zn(II) complexes have a diamagnetic character. The 1H-and 13C-nmr and GC/MS spectra of the vic-dioxime ligand and its Ni(II), Pd(II) and Zn(II) complexes were recorded. In addition, all compounds are non-electrolyte

Isolation of colour components from Rubia tinctorum L.: Chromatographic determination, spectrophotometric investigation, dyeing properties and antimicrobial activity

In this paper, a sensitive quantification high performance liquid chromatographic method for analysis of alizarin in madder root (Rubia tinctorum L.) obtained from South of Anatolia, Turkey is reported. The alizarin is separated on Zorbax SB C18 column with a water-acetonitrile gradient as eluent and measured with UV detection at 250 nm. With this method the aglycone alizarin can be analyzed. Regression equation that obtained from the calibration curve, revealed a linear relationship (r2 = 0.9981) between the mass of alizarin injected and the peak area. After, the colour components responsible for dyeing were determinated and its chemical constituents were established based on chemical and spectroscopic investigations. Afterwards, the wool fabrics have been dyed with combined mordanting and mordantless techniques. Fastness to light, washing and rubbing of the dyed fabrics were measured and discussed. Additionally, extracts (ethanolic and aqueous) of R. tinctorum L. root and dyed materials were investigated for their antimicrobial activities against eight pathogens (Aeromanas hydrophila. Bacillus megaterium, Corynebacterium xenosis, Pseudomonas aeruginosa, Micrococcus luteus, Enterococcus faecalis, Stapylococcus aureus and Escherichia coli). The extracts and dyed materials were not effective against the growth of Escherichia coli. The fabric dyed, however, showed less antimicrobial activity, as uptake of this dye in textile material is below minimum inhibitory concentration (MIC)

Synthesis of hydroxyethyl cellulose from industrial waste using microwave irradiation

The paper describes the synthesis of hydroxyethyl cellulose from industrial waste, namely, air particle vacuum dust (APVD). The selected reaction parameters were sodium hydroxide concentration, ethylene oxide proportion, reaction time, and reaction temperature in an attempt to understand their effects on the reaction. For this purpose, APVD was bleached and mercerized using sodium hydroxide and hydrogen peroxide solution to remove/dissolve non-cellulosic material. The modified waste material was then reacted with ethylene oxide under microwave irradiation to obtain hydroxyethyl cellulose. To determine the effect of each reaction parameter, the degree of substitution and viscosity were measured and compared in detail. The greatest values were achieved using 40% (w/v) sodium hydroxide, one gram ethylene oxide per gram of APVD, a 90 min reaction time, and a 70 °C reaction temperature. Process efficiency was evaluated by recording 1H-NMR (nuclear magnetic resonance), solid-13C-NMR, Fourier Transform Infrared Spectroscopy, Differential Thermal Analysis-Thermogravimetry, Differential Scanning Calorimetry and Scanning Electron Microscope of best samples. These helped elucidate the expected reaction. The proposed method, compared with the conventional method, was easy, fast, and straightforward. Keywords: Air particle vacuum dust, Synthesis, Microwave, Hydroxyethyl cellulos

Spectroscopic and analytic properties of new copper(II) complex of antiviral drug valacyclovir

The complexation processes between CuII and the antiviral drug, valacyclovir hydrochloride (H2L), were studied under different reaction conditions, using UV-Vis, IR and mass spectra, magnetochemical, thermogravimetric, atomic absorption, conductivity, and elemental analysis data. Using the Job method, the compositions of these complexes were determined. Under the ligand (H2L) excess (M:L =Â 1:1-1:10). In aqueous solutions, a binuclear violet complex Cu2(HL)2L(H 2O)4 is formed, with an octahedral structure. Under comparable amounts of the reagents, in MeOH solutions, a green mononuclear complex Cu(H2L)Cl2 is formed. Protonation constants of the H2L, and stability constants of its Cu2+ complexes, were determined by potentiometric titration in H2O media at 25 ± 0.02 °C under a N2 atmosphere and ionic strength of 0.1 m NaCl. It has been observed that H2L has three protonation constants. The divalent metal ion Cu2+ forms stable 2:1 and 2:2 complexes with H2L. The antimicrobial activity studies of the valacyclovir and it's complexes have been studied against some gram positive species: (Corynebacterium xerosis, Bacillus brevis, Bacillus megaterium, Bacillus cereus, Mycobacterium smegmatis, Staphylococcus aureus, Micrococcus luteus, Enterococcus faecalis) and gram negative (Pseudomonas aeruginosa, Klebsiella pneumoniae, Escherichia coli, Yersinia enterocolitica, Kluyveromyces fragilis, Saccharomyces cerevisiae, Candida albicans) bacteriaz. © Springer 2006.2004/4–6The authors gratefully acknowledge the funding of this work by the Research Fund (Project No: 2004/4–6) of Kahramanmaras¸ Sütc¸ ü İmam University, Kahraman-maras¸ , Turkey. They would like to thank Assoc. Prof. Dr. İsmet Kaya (University of 18 March, Faculty of Science and Arts, Department of Chemistry, C¸ anakk-ale, Turkey) for DTA-TG analyses

Comparison of classic Fenton with ultrasound Fenton processes on industrial textile wastewater

This study provides a comparison between classic and modified (i.e., ultrasound) Fenton process on the industrial textile wastewater. For this purpose, the classic, and ultrasound Fenton process were investigated and compared using the following parameters: pH of solution, amount of ferrous ion (Fe(II)), and hydrogen peroxide as well as reaction time. With these parameters, degrading organic compounds (i.e., decolorization percentage) was calculated. The best decolorization percentage (95% for Pt-Co) was found using 0.10 g L−1 of Fe(II), and 2.20 g L−1 of H2O2 for 90 min at pH 3 for classic Fenton process. Similar experiments were carried out using 35 kHz ultrasonic irradiation, and the best decolorization percentage (99% for Pt-Co) was obtained via 0.05 g L−1 of Fe (II) and 1.65 g L−1 H2O2 for 60 min at pH 3 for ultrasound Fenton process. The results showed that decolorization increased with decreasing amount of chemical for the ultrasound Fenton process. Additionally, the contact time was decreased by comparing performance with classic Fenton process. In light of these results, the ultrasound Fenton process can be used for decolorization of textile wastewater to save reaction time and chemical costs. Also, the decolorized water (e.g., treated water) may be reused in the plant for washing the textile materials after applying ion exchange process