Optimization and biosynthesis of calcined chicken eggshell doped titanium dioxide photocatalyst based nanoparticles for wastewater treatment

This study presents, biosynthesis of calcinated eggshell (CES) doped with Titanium dioxide (TiO2,) photocatalyst for photodegradation of methylene blue from synthetic wastewater. The influence of three independent variables for improving photodegradation efficiency was investigated and optimized using response surface methodology of Box–Behnken Design on the removal of methylene blue using the calcined chicken eggshells (CES) doped with titanium dioxide. The experimental result showed that 95.8% degradation efficiency of methylene blue by prepared photocatalyst at a contact time of 180 min, initial concentration of methylene blue of 10 ppm, and calcined eggshells (CES) doped with titanium dioxide dose of 2.5 g/L. The synthesized photocatalyst was characterized by Fourier-transform infrared spectroscopy, UV-spectrometer, and X-ray diffractometer and UV–vis Spectroscopy for determined their functional group, structure, and bandgap energy respectively. Their results depict the calcined eggshell doped with titanium dioxide photocatalyst is a promising option for the degradation of methylene blue from industrial wastewater under the stated condition. Highlights Analysis of chicken eggshell wastes are being used as photocatalyst source to calcinated eggshell doped TiO2, i.e., ‘Waste to photocatalyst’ for production of viable sustainable products to bio photocatalyst from wastewater to fulfill the need of an expensive metal-doped catalyst. Photocatalytic degradation of Methylene Blue experiment has been done. The highest degradation efficiency of 95.8% methylene blue was obtained at a contact time of 180 min, 10 ppm of initial concentration of methylene blue, and a dopant dose of 2.5 g/L by using prepared photocatalyst.

Crystal Structure and Thermal Behaviour of Calcium Monosilicate Derived from Calcined Chicken Eggshell and Rice Husk Ash

This study focuses on the synthesis of synthetic calcium monosilicate ceramic from chicken eggshells and rice husks waste through the mechanochemical route that relatively straightforward without adding any binders. Synthetic calcium monosilicate was mixed using a 1:1 ratio of calcined eggshell and rice husk ash, which both materials known as rich in calcium oxide and silica sources, respectively. The mixed powder was pressed using uniaxial pressing before fired at 1100°C, 1150°C, 1200°C, 1250°C, and 1300°C for 120 minutes with a heating rate of 5°C/min. The XRD spectrum from 1100°C to 1200°C mainly consists of pseudowollastonite (ICSD: 98-005-2576), wollastonite and silicon dioxide phases. However, as the sintering temperature increases, the wollastonite phases was completely transformed into pseudowollastonite, leaving some unreacted silica.

Utilization of Breed Chicken Eggshells to Make Biodiesel from Waste Cooking Oil

Chicken eggshell waste is a potential source of CaO which can be converted into heterogeneous catalysts. The purpose of this study was to utilize CaO heterogeneous catalysts to make biodiesel from waste cooking oil through the process of transesterification. A total of 4 g of catalyst was mixed with 200 g of waste cooking oil and 60 g of methanol, stirred at a speed of 700 rpm for 6 hours at a temperature of 600C ± 40C. The results were analyzed using GC-MS to confirm the formation of various methyl ester compounds. The product was found to have a density of 855 Kg/m3., viscosity of 3.74 mm2/s (cSt), and flash point of 1350C Based on the results, it be concluded that breed chicken eggshells can be converted as catalysts heterogeneous to make biodiesel from waste cooking oil. This information is very useful for further optimization of mass catalysts heterogeneous CaO from breed chicken eggshells including the production of biodiesel.

Elastic Moduli of Avian Eggshell

We analyze 700 freshly-laid eggs from 58 species (22 families and 13 orders) across three orders of magnitude in egg mass. We study the elastic moduli using three metrics: (i) effective Young’s modulus, EFEM, by a combined experimental and numerical method; (ii) elastic modulus, Enano, by nanoindentation, and (iii) theoretical Young’s modulus, Etheory. We measure the mineral content by acid-base titration, and crystallographic characteristics by electron backscatter diffraction (EBSD), on representative species. We find that the mineral content ranges between 83.1% (Zebra finch) and 96.5% (ostrich) and is positively correlated with EFEM—23.28 GPa (Zebra finch) and 47.76 GPa (ostrich). The EBSD shows that eggshell is anisotropic and non-homogeneous, and different species have different degrees of crystal orientation and texture. Ostrich eggshell exhibits strong texture in the thickness direction, whereas chicken eggshell has little. Such anisotropy and inhomogeneity are consistent with the nanoindentation tests. However, the crystal characteristics do not appear to correlate with EFEM, as EFEM represents an overall “average” elasticity of the entire shell. The experimental results are consistent with the theoretical prediction of linear elasticity. Our comprehensive investigation into the elastic moduli of avian eggshell over broad taxonomic scales provides a useful dataset for those who work on avian reproduction.

PENGARUH SERBUK CANGKANG TELUR AYAM DAN PUPUK NPK 16:16:16 TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN TOMAT (Lycopersicum esculentum Mill.)

Tomato (Lycopersicum esculentum Mill.) is one of the vegetables that have high economic value. However, tomato production in Riau is constrained by low fertility and acidity. Egg shell waste can be used as a substitute for lime to increase soil pH. NPK fertilizer is used to provide nutrients for plants. This study aims to determine the effect of chicken eggshell powder and NPK 16:16:16 fertilizer on the growth and yield of tomato plants. This research was conducted in the experimental farm of the Faculty of Agriculture, Riau Islamic University, Pekanbaru. The study was conducted from March to July 2019. The study was conducted using a completely randomized design (CRD) with 16 treatments and repeated 3 times. The first factor was chicken eggshell powder with 4 levels (0, 15, 30, 45 g/plant) and the second factor was NPK fertilizer 16:16:16 with 4 levels (0, 10, 20, 30 g/plant). The results showed that the interactions occurred in the number of fruits per plant, fruit weight per plant on reatments for 45 g of chicken eggshell powder/plant and NPK 16:16:16 30 g / plant.

Analysis of physical properties and compressibility of avian eggshell nanopowders in solid state reaction

Eggshell is bioceramic material that produces by avian that commonly contains of 94 % calcium carbonate, 1 % magnesium carbonate, 1 % calcium phosphate, and 4 % other organic element. This study proposed to investigate the synthesis and characterization of avian eggshell powders. The avian eggshell that used in this study involved chicken, duck, and quail eggshells. The characterization of avian eggshell nanopowder for reducing their grain size from micro to nano involved ball milling process (solid state reaction) with the variation of milling times (3, 5, and 7 hours) and sintering temperature at 1000 oC for 2 hours. X-Ray Diffraction (XRD) test presented the phase characterization of quail eggshell nanopowder which ball-milled for 7 hours, obtained the smallest crystallite size at 19.2 nm. Scanning Electron Microscopy (SEM) test presented the morphological analysis that showed changes in grain size and shape of each variety of the avian eggshell such as spherical, oval, wormlike, cubical, triangular, and some irregular grains. Energy Dispersive X-Ray (EDX) test presented the compound in avian eggshell powders that showed Ca and O level were the highest, while C was the lowest level. Fourier Transform Infrared (FTIR) test presented the possibility of the functional group of the avian eggshell powders that showed Ca-O, Ca=O groups, CaCO3, asymmetric C-O, -CO3, amide, C=O, -OH, alkyl CH, and C-H. While compressibility shown the increase along with the decrease of crystallite and particles size in cubical grain. The highest compression ratio is 67.75 % for chicken eggshell nano powder with 5 hours milling time at 2000 kgf of compression loading

Assessment of Insecticidal Potency of Eggshell Powder Against Maize Weevil

Efficacy of chicken eggshell powder at concentrations 0, 0.25, 0.5, 1.0 and 2.0 g /100 g maize, for control of Sitophilus zeamais, were compared with permethrin at dosage rate of 0.167g / 100 g of yellow maize. Experiments were conducted at Biotechnology laboratory (NSPRI), Ilorin under ambient condition (26±3oC 65±5% RH). Mortality of S. zeamais increased with increasing dosages of the CESP as well as with days of exposure. CESP at 2.0g gives 96.67% mortality which is not significantly different from the positive control. The mean progeny emergence (0.00%), weight loss (1.11%), and percentage grain damage (19.68%) by S. zeamais was significantly (P ≤ 0.05) decreased with increased dosage of CESP. However, CESP did not significantly affect seed germination. Total coliform count at 2.0 g (2.48 x 102) was significantly different from both positive and negative controls at p<0.05 Therefore, CESP can serve as a good maize protectant which can be used as substitute for synthetic chemicals.