Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Evaluation of Cefixime trihydrate effect on the biological properties of activated sludge Evaluation of Cefixime trihydrate effect on the biological properties of activated sludge 1 7 2306 10.22075/chem.2017.2306 FA Soheil Aber Leila Ghalamchi Raana Tajdidkhaje Journal Article 2017 02 17 Activated sludge is an aerobic biological wastewater treatment process. This process has been efficiently and extensively used for the treatment of industrial and municipal wastewaters since about 100 years ago. Some drugs such as antibiotics have adverse effects on the bacteria in activated sludge. Cefixime trihydrate is a semi-synthetic antibiotic belonging to the third generation of Cephalosporins. In this research the effect of Cefixime on the biological operational parameters of activated sludge process was investigated. MLSS, SVI, COD and microscopic analysis of sludge texture were evaluated. The results showed that by carefully controlling of the operational parameters in adopting period, sludge quality can be kept in acceptable level. MLSS of 3500 ppm, pH of 7.6 and SVI of 90 mL.g-1 were average controlled parameters. The COD reduced from 800 to 40 ppm after implementing the adoption period. Optical microscopic analysis showed that after adoption period, microorganisms such as protozoa and ciliate are active in activated sludge even in the presence of antibiotic. Activated sludge is an aerobic biological wastewater treatment process. This process has been efficiently and extensively used for the treatment of industrial and municipal wastewaters since about 100 years ago. Some drugs such as antibiotics have adverse effects on the bacteria in activated sludge. Cefixime trihydrate is a semi-synthetic antibiotic belonging to the third generation of Cephalosporins. In this research the effect of Cefixime on the biological operational parameters of activated sludge process was investigated. MLSS, SVI, COD and microscopic analysis of sludge texture were evaluated. The results showed that by carefully controlling of the operational parameters in adopting period, sludge quality can be kept in acceptable level. MLSS of 3500 ppm, pH of 7.6 and SVI of 90 mL.g-1 were average controlled parameters. The COD reduced from 800 to 40 ppm after implementing the adoption period. Optical microscopic analysis showed that after adoption period, microorganisms such as protozoa and ciliate are active in activated sludge even in the presence of antibiotic.

https://chemistry.semnan.ac.ir/article_2306_ff3c397bbe6e037b0c86516dcffd44e5.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 AuNPs/RGO nanocomposite synthesize and characterization and investigation on its effects as mitoxantrone drug carrier in drug delivery on breast cancer therapy AuNPs/RGO nanocomposite synthesize and characterization and investigation on its effects as mitoxantrone drug carrier in drug delivery on breast cancer therapy 8 13 2289 10.22075/chem.2017.2289 FA Journal Article 2016 05 03 In this research, first mercaptopropionic acid was functionalized by N-hydroxy succinimide and DCC then resulted medium was conjugated with MTX drug and AuNPs with 6nm in size and at last, the whole combination was turned into AuSMTX/RGO nanocomposite, using reduced graphene oxide. Resulted nanoparticles and nanocomposites were characterized by XRD, TEDM, TGA and RAMAN techniques and finally nanocomposite effects on MCF-7 breast cancerous cells death cell mechanisms were investigated using in-vitro techniques such as MTT assay, Flow cytometry, DAPI staining and Real time PCR. In this research, first mercaptopropionic acid was functionalized by N-hydroxy succinimide and DCC then resulted medium was conjugated with MTX drug and AuNPs with 6nm in size and at last, the whole combination was turned into AuSMTX/RGO nanocomposite, using reduced graphene oxide. Resulted nanoparticles and nanocomposites were characterized by XRD, TEDM, TGA and RAMAN techniques and finally nanocomposite effects on MCF-7 breast cancerous cells death cell mechanisms were investigated using in-vitro techniques such as MTT assay, Flow cytometry, DAPI staining and Real time PCR.

https://chemistry.semnan.ac.ir/article_2289_c79ca61caf72ab5caad065687678ad74.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Synthesis, characterization and investigation of photocatalytic activity of polyaniline/supported porous ceramics-TiO2 nanocomposite in degradation of organic pollutant under visible light irradiation Synthesis, characterization and investigation of photocatalytic activity of polyaniline/supported porous ceramics-TiO2 nanocomposite in degradation of organic pollutant under visible light irradiation 14 19 2290 10.22075/chem.2017.2290 FA Journal Article 2016 05 09 In order to degradation of organic pollutants, such as industrial dyes in water resources, soil and air, ceramic and polymer-modified nanoparticles of titanium dioxide which were prepared "in situ" via sol - gel and chemical oxidative polymerization. Structure and properties of photocatalysts were analyzed with the help of X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Particle size was obtained nm 20 by Scherrer equation. In order to evaluate the photocatalytic activity of the nano-composite optical crystal violet degradation were studied in aqueous solution under visible light irradiation in a reactor designed. The reduction of the concentration of crystal violet was investigated using UV-Vis spectroscopy. The results of destruction showed that degradation under visible light, titanium dioxide ceramic nano-composite/polyaniline has higher photocatalytic activity than titanium dioxide ceramic nano composite. The efficiency of crystal violet discoloration in the optimum values of all variables, was obtained 96%, respectively. The results of research showed that by optimizing the effective operational parameters, this method has high efficiency for crystal violet pollutant discoloration from environmental and can also be done on a larger scale. In order to degradation of organic pollutants, such as industrial dyes in water resources, soil and air, ceramic and polymer-modified nanoparticles of titanium dioxide which were prepared "in situ" via sol - gel and chemical oxidative polymerization. Structure and properties of photocatalysts were analyzed with the help of X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Particle size was obtained nm 20 by Scherrer equation. In order to evaluate the photocatalytic activity of the nano-composite optical crystal violet degradation were studied in aqueous solution under visible light irradiation in a reactor designed. The reduction of the concentration of crystal violet was investigated using UV-Vis spectroscopy. The results of destruction showed that degradation under visible light, titanium dioxide ceramic nano-composite/polyaniline has higher photocatalytic activity than titanium dioxide ceramic nano composite. The efficiency of crystal violet discoloration in the optimum values of all variables, was obtained 96%, respectively. The results of research showed that by optimizing the effective operational parameters, this method has high efficiency for crystal violet pollutant discoloration from environmental and can also be done on a larger scale.

https://chemistry.semnan.ac.ir/article_2290_d5bc11af62fb59b5864108b460b029f1.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Composite bio-synthesis of nano silver powder of the sea floor Composite bio-synthesis of nano silver powder of the sea floor 20 26 2291 10.22075/chem.2017.2291 FA Journal Article 2016 04 12 reclamation of salt silver nitrate chemical synthesis method of CPR. In this method, polyvinyl alcohol (PVA) as پایدارکننده and trisodium citrate is used as a احیاءکننده agent. Visible-ultraviolet-absorption spectroscopy (UV-Vis) and dynamic light scattering (DLS) techniques formed the silver nanoparticles with 43 nm to a medium size تاًیید. In the next step powder purchased sea floor, rinsed with distilled water several times, and after drying of the elk were given passes to the resulting uniform size particles. The composition of the preparation of the powder components using x-ray fluorescence spectroscopy (XRF) was detected. For the preparation of nano-bio composit, a decent amount of colloidal silver nanoparticles synthesis solution with a certain amount of powdered sea floor preparation, under ultrasonic waves were mixed. Check the field emission electron microscope images of microscope (FE-SEM) represent a uniform distribution of silver nanoparticles in the context of sea floor powder reclamation of salt silver nitrate chemical synthesis method of CPR. In this method, polyvinyl alcohol (PVA) as پایدارکننده and trisodium citrate is used as a احیاءکننده agent. Visible-ultraviolet-absorption spectroscopy (UV-Vis) and dynamic light scattering (DLS) techniques formed the silver nanoparticles with 43 nm to a medium size تاًیید. In the next step powder purchased sea floor, rinsed with distilled water several times, and after drying of the elk were given passes to the resulting uniform size particles. The composition of the preparation of the powder components using x-ray fluorescence spectroscopy (XRF) was detected. For the preparation of nano-bio composit, a decent amount of colloidal silver nanoparticles synthesis solution with a certain amount of powdered sea floor preparation, under ultrasonic waves were mixed. Check the field emission electron microscope images of microscope (FE-SEM) represent a uniform distribution of silver nanoparticles in the context of sea floor powder

https://chemistry.semnan.ac.ir/article_2291_b796376f744782b41aa9e16030b7f3a1.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Investigation of oxidative removal of CO gas in a photocatalytic process using spinel nano structure ZnCr2O4 catalyst on ZSM-5 support Investigation of oxidative removal of CO gas in a photocatalytic process using spinel nano structure ZnCr2O4 catalyst on ZSM-5 support 27 33 2292 10.22075/chem.2017.2292 FA Journal Article 2016 04 06 CO pollutant gas is a kind of dangerous gas in the exhaust gases of automobile vehicles, power plants and coal industries, mining and smelting furnace plants. This gas can damage vegetation and aquatic organisms due to photochemical reactions resulting smoke which causes acid rain. Photo catalyst used in this research is spinel ZnCr2O4 on ZSM-5 support. This photo catalyst is prepared by sol-gel combustion method and in this search, the amount of CO removal efficiency by photocatalysts in a batch reactor is determined by gas chromatography (GC) and the characteristics of this catalyst are studied by XRD, SEM and FT-IR methods. The main goal of this project is to maximize the removal efficiency of CO in the shortest time possible. CO pollutant gas is a kind of dangerous gas in the exhaust gases of automobile vehicles, power plants and coal industries, mining and smelting furnace plants. This gas can damage vegetation and aquatic organisms due to photochemical reactions resulting smoke which causes acid rain. Photo catalyst used in this research is spinel ZnCr2O4 on ZSM-5 support. This photo catalyst is prepared by sol-gel combustion method and in this search, the amount of CO removal efficiency by photocatalysts in a batch reactor is determined by gas chromatography (GC) and the characteristics of this catalyst are studied by XRD, SEM and FT-IR methods. The main goal of this project is to maximize the removal efficiency of CO in the shortest time possible.

https://chemistry.semnan.ac.ir/article_2292_5df53b4c559b5fc052c238c01d859cc2.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Simulation of fluidized bed reactor to remove acid yellow 36 by computational fluid dynamics method Simulation of fluidized bed reactor to remove acid yellow 36 by computational fluid dynamics method 34 41 2293 10.22075/chem.2017.2293 FA Journal Article 2016 04 10 Chemical Dye is the most common pollutant which is used in plastic, textile, paper, cosmetic and food industries. Due to dye's chemical structure they may not be degraded readily by typical chemical purification or biological treatment methods, so that advanced oxidation processes (AOP) is rapidly becoming an attractive alternative for the degradation of organic or inorganic contaminants. In this investigation, simulation of the fluidized bed reactor to remove yellow acidic dye by heterogeneous Fenton process with computational fluid dynamics method is studied. Hydrodynamic and reaction parameters of CFD results are compared with experimental data, law discrepancy between experimental data and CFD model confirms the reliability of the CFD model. Chemical Dye is the most common pollutant which is used in plastic, textile, paper, cosmetic and food industries. Due to dye's chemical structure they may not be degraded readily by typical chemical purification or biological treatment methods, so that advanced oxidation processes (AOP) is rapidly becoming an attractive alternative for the degradation of organic or inorganic contaminants. In this investigation, simulation of the fluidized bed reactor to remove yellow acidic dye by heterogeneous Fenton process with computational fluid dynamics method is studied. Hydrodynamic and reaction parameters of CFD results are compared with experimental data, law discrepancy between experimental data and CFD model confirms the reliability of the CFD model.

https://chemistry.semnan.ac.ir/article_2293_545b9e1c0e0e43468ccdf9e78fae861f.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Novel ionic liquid as an efficient and recyclable catalyst for the Knoevenagel reaction in water Novel ionic liquid as an efficient and recyclable catalyst for the Knoevenagel reaction in water 41 47 2294 10.22075/chem.2017.2294 FA Journal Article 2016 05 21 2-hydroxyethan-1-aminium 3-hydroxypropane-1-sulfonate (HEAHPS) was synthesized as a novel ionic liquid. This ionic liquid was prepared from cost-effective and readily available starting materials. HEAHPS ionic liquid was characterized by 1H NMR, 13C NMR and elemental analysis. This ionic liquid was used as an efficient and recyclable catalyst in Knoevenagel reaction in water and the products synthesized in high yield in the short time. The use of water as the safe reaction medium makes the process environmentally benign. 2-hydroxyethan-1-aminium 3-hydroxypropane-1-sulfonate (HEAHPS) was synthesized as a novel ionic liquid. This ionic liquid was prepared from cost-effective and readily available starting materials. HEAHPS ionic liquid was characterized by 1H NMR, 13C NMR and elemental analysis. This ionic liquid was used as an efficient and recyclable catalyst in Knoevenagel reaction in water and the products synthesized in high yield in the short time. The use of water as the safe reaction medium makes the process environmentally benign.

https://chemistry.semnan.ac.ir/article_2294_2a176302d207abe690da825111d3626e.pdf

Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Simulation of Methane Steam Reforming Reactor containing Spherical and Flat Catalyst Pellets Simulation of Methane Steam Reforming Reactor containing Spherical and Flat Catalyst Pellets 48 65 2295 10.22075/chem.2017.2295 FA Journal Article 2016 05 24 In this work, simulation of a catalytic methane steam reforming was carried with considering of internal mass transfer resistance in spherical and flat catalyst pellets. Simulation was done for a an industrial reactor with 9 meters in length by involving the mass and energy balance equations .the boundary values system differential equations for catalyst pellets were solved by shooting method, and the fourth Rung-Kutta algorithm was used to solve the mass and energy balance differential equations with programming in MATLAB software. The concentration profiles of species inside the pellet and the feed conversion, temperature and concentration of species along the reactor length were calculated. Furthermore effect of feed temperature and catalyst pellet geometry on the conversion and reactor performance was investigated. In this work, simulation of a catalytic methane steam reforming was carried with considering of internal mass transfer resistance in spherical and flat catalyst pellets. Simulation was done for a an industrial reactor with 9 meters in length by involving the mass and energy balance equations .the boundary values system differential equations for catalyst pellets were solved by shooting method, and the fourth Rung-Kutta algorithm was used to solve the mass and energy balance differential equations with programming in MATLAB software. The concentration profiles of species inside the pellet and the feed conversion, temperature and concentration of species along the reactor length were calculated. Furthermore effect of feed temperature and catalyst pellet geometry on the conversion and reactor performance was investigated.

https://chemistry.semnan.ac.ir/article_2295_f735332502fd6f27b72df361adc2c446.pdf