الهام پورنامداری

The applicability of Albizia Stem Bark Lebbeck Modified by Fe2(MoO4)3 nanocomposite, was studied for eliminating Methyl Violet dye from industrial wastewater. Identical techniques including (IR, XRD, and SEM) have been utilized to characterize this novel material. The impacts of variables including initial Methyl Violet concentration (X1), pH (X2), adsorbent dosage (X3), and sonication time (X4) came under scrutiny using central composite design (CCD) under response surface methodology (RSM). The values of 20 mgL-1, 0.03 g, 5.0, 3.0 min were considered as the ideal values for Methyl Violet concentration, adsorbent, pH, and contact time, respectively. Adsorption equilibrium and kinetic data were fitted with the Langmuir monolayer isotherm model and pseudo-second-order kinetics (R2: 0.999) with maximum adsorption capacity (120.4 mgg-1), respectively. Thermodynamic parameters (ΔG°: -9.26 kJ mol-1, ΔH°: -29.24 kJ mol-1, ΔS°: -131.49 kJ mol-1 K-1), also indicated Methyl Violet adsorption is feasible, spontaneous and exothermic. Overall results confirmed that Albizia Stem Bark Lebbeck Modified by Fe2(MoO4)3 nanocomposite is an effective adsorbent for removing the toxic dyes from an wastewater.

In this study the residue behavior of toxic insecticide abamectin on surface water with fluorescent chemical sensors because they are non-destructive, the ability to show decomposed concentrations, fast response, and high was investigated. In this research, a chemical sensor was synthesized PbS functionalized with gelatin quantum dots for toxic abamectin. The calibration curve was linear in the range of (0.05 to 10.0 µgL−1). The standard deviation of less than (1.1 %), and detection limits of the method (0.05 µgL−1) in time 60 s, 350 nm were obtained for sensor level response PbS Quantum Dot–Gelatin nanocomposites sensor with (95%), confidence evaluated. The observed outcomes confirmed the suitability recovery and a very low detection limit for measuring the toxic abamectin. The chemical PbS Quantum Dot–Gelatin nanocomposites sensor as excellent sensor in the practical application of toxic abamectin related to residue management is in Water Samples. The method fluorometric can be used as to estimate the appropriate PHIs and can also support authorization of plant protection products as supplementary information.

In this current article, a chemical sensor was synthesized PbS functionalized with Gelatin Quantum Dots for Fenpyroximate. The measure of Fenpyroximate was performed using concentration (2.5×10-3 mol L-1), PbS Quantum Dot-Gelatin nanocomposites sensor, pH 6, and time 40 s, wavelength 328 nm. Under the optimum conditions, the detection limit linear range were obtained (0.02 to 20.0 µg L-1). The standard deviation of less than (2.0%), and detection limits (3S/m) of the method (0.02 µg L-1) for determination of Fenpyroximate, was obtained. The observed outcomes confirmed the suitability recovery and a very low detection limit for measuring the Fenpyroximate. The chemical PbS Quantum Dot–Gelatin nanocomposites sensor as excellent sensor in the practical application of Fenpyroximate related to residue management is in surface water samples.

Gold nanoparticles can be used as a protective compound in the packaging of nutritionally valuable materials due to their non-toxic effects on humans and high antibacterial and antioxidant properties. Other applications in the food industry, such as the construction of sensors to identify the remnants of hazardous materials from agricultural and industrial processes, are conceivable for these materials. One of the methods of synthesis of these nanoparticles is the use of natural compounds due to reducing the side effects of chemicals, a new approach that in recent years has been referred to as "green chemistry".

gold nanoparticles were synthesized using curcumin purified from turmeric as the main source of this compound. The synthesis process was investigated using UV-VIS, FT-IR spectroscopy methods. The structure and morphology of the nanoparticles were performed using XRD spectroscopy and TEM and SEM imaging. The antioxidant properties of gold-curcumin nanoparticles were evaluated by DPPH free radical scavenging method.

Au-nanoparticles were synthesized using the green chemistry method using curcumin purified from turmeric in the form of a cross and cubic crystal structure of filled funds with an average size of 9.80 nm. Antioxidant studies showed that the free radical scavenging ability of gold-curcumin nanoparticles was increased as compared to pure curcumin.

Curcumin as a natural compound with antioxidant properties has the ability to reduce gold ions and convert them into nanoparticles, and due to the use of these nanoparticles in the food industry, this method can be used as a green, inexpensive and eco-friendly.

Pomegranate tree has been originated in east Asia and Iran. The consumption of pomegranate is curative and prevents many sicknesses, therefore pomegranate has a special place in human diet.

In this investigation, the effect of foliar spray application of different forms of Zinc in different concentrations on some characteristics of pomegranate fruit, has been studied. The application of spray was carried out during May and July of 2016. This study was at based on a randomized complete block design with seven treatments and three replications. Zinc sulphate fertilizer and nano-Zn chelate fertilizer were applied in 500, 1000 and 1500 mgl-1 concentrations.

The application of 500 mgl-1 nano-Zn chelate significantly increased fruits grains weight and fresh weight of 100 grains. 1500 mgl-1 ZnSO4 increased the pH, total acidity and ascorbic acid contents of the juice but 500 mgl-1 nano-Zn chelate had a toxic effect on all of the factors and decreased them. 1000 mgl-1 ZnSO4 significantly increased anthocyanin and EC of the juice, although 1500 mgl-1 nano-Zn chelate decreased anthocyanin and 500 mgl-1 nano-Zn chelate decreased EC.TSS and TSS/TA was increased by 500 mgl-1 ZnSO4 whereas 1500 mgl-1 nano-Zn chelate decreased both of them.

Although different concentrations of ZnSO4 fertilizer improve the chemical characteristics of pomegranate fruit, but totally the best foliar spray application is at 500 mgl-1 nano-Zn chelate.

A simple, sensitive and selective method for exteraction of trace amounts of Pb(II) in water samples based on the adsorption of Multi Wall Carbon NanoTube carboxyl. A new methods technique using a disperse solid phase extraction (DSPE) with Multi Wall Carbon NanoTube carboxyl as sorbent was developed for the preconcentration of trace amounts of Pb(II) inVaramin waste water samples and was determined by flame atomic absorption spectrometry (FAAS). Some of the important parameters on the preconcentration and complex formation were selected and optimized. Under the optimized conditions the limit of detection (LOD) and relative standard deviation were 0.070µg.L-1,0.562 µg.L-1 and 0.79% respectively. the proposed method has a good reproducibility 0.81% (RSD %).The enrichment factor was 200 and the percentage of recovery was in the range of 95-100% .The method was successfully applied to the recovery of Pb2+in different type of water samples. of Multi Wall Carbon NanoTube carboxyl in this study is full of potential to use as an excellent adsorbent in the extraction method like solid phase extraction(SPE) and solid phase micro extraction(SPME).

In this investigation¡ the effect of foliar spray application of different forms of Zinc in different concentrations on some quality characteristics of pomegranate fruit¡ were studied. This spray application was carried out in May and July of 2016. This study was conducted based on a randomized complete block design with seven treatments and three replications per treatment. ZnSO4 fertilizer and nano-Zn chelate fertilizer were applied in 500¡ 1000 and 1500 mgl-1 concectrations. Application of 500 mgl-1 nano-Zn chelate significantly increased fruit grain percentage¡ fruit peel percentage¡ dry weight of 100 grains¡ dry weight of peel¡ relative water content of 100 grains percentage and relative water content of peel. Furthermore¡ 1500 mgl-1 ZnSo4 treatment had a toxic effect on these characteristics and significantly decreased all of them. According to the results¡ nano- Zn chelate spray application is better than ZnSo4 spray application and 500 mgl-1 concentration of this fertilizer is suggested in spray applications.