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Adsorptive (titanium pillared montmorillonite) with the TiCl4 as the precursors were prepared for the regeneration. A novel approach was used to regenerate the Ti-MMT after removal As from the As solution using the regeneration solution, and the regeneration materials were characterized by FT-IR, XRD, BET. The results indicated that the capacities of the original and the regenerated materials were...
The release of metal ions and wear debris are raising serious concerns on metal-on-metal (MoM) hip prosthesis. The purpose of this work was to evaluate the corrosion and tribocorrosion behavior, of a low-carbon CoCrMo alloy, as a function of proteins content in the biological fluid and normal applied load. Electrochemical tests were performed to study the corrosion behavior of the alloy, under two...
Stabilization is considered to be a well-established disposal technique to reduce sludge handling and disposal obstacles. A sludge modifier which comprises a mixture of three cementitious components was proposed for sludge drying and stabilization. The application of uniform design and its corresponding mathematical modeling and Simulated Annealing optimization methodology are investigated to optimize...
The removal of reactive red 2 and methylene blue from aqueous solution was studied using soybean meal as an adsorbent. The effects of some parameters such as solution pH and contact time on the adsorption were investigated. The equilibrium time was found to be more than 60 min for equilibration. Equilibrium data conformed to the Freundlich, Langmuir and Redlich-Peterson isotherm models, where the...
The reaction between hydrogen peroxide and sodium chlorate in presence of aqueous sulfuric acid was studied at various temperatures and molar concentrations of hydrogen peroxide, chlorate and sulfuric acid. The reaction rate law was established by analyzing the consumption of chlorate or hydrogen peroxide. Reaction had been found 0.5 and 1 order with respect to hydrogen peroxide and chlorate concentration,...
The removal of iron from industrial aluminum sulfate by the extraction system of primary amine N-1923, n-octanol and kerosene was studied. The effects such as pH values, phase ratios O/A, the volume fractions of extractant and modifier, contact time of extraction on extraction yield of iron were investigated. The results show that the extraction yield of iron from industrial aluminum sulfate is 99...
Summary form only given. A recent resurgence of interest in new, more powerful, coherent sources of terahertz (THz) radiation (0.3-3.0 × 1012 Hz) has been driven by advances in fabrication and device physics modeling, emergence of new security threats, and application potential in high data rate communications, concealed weapon or threat detection, remote high resolution imaging, chemical spectroscopy,...
Photo darkening (PD) of ytterbium co-doped silica fibers are experimentally investigated and a numeric model for PD is proposed. The spectral response of PD is discussed based on a chemical bond formation model.
For the save and long-term operation the integrity of the mechanical component and structure is one of the key objectives. For older plants (nuclear as fossil) the aging and plant life management showed a lot of piping to be changed due to degradation caused by Flow-accelerated corrosion (FAC).
We demonstrate a 3D porous photonic crystal whose inner surfaces are chemically functionalized in arbitrary spatial patterns with micro-scale resolution. We use this platform to demonstrate a method for solvent-specific multi-layer message encryption.
Sensors used for in-situ water monitoring are subject to biological fouling, siltation, and scaling [3]. Fouling causes inaccurate measurements. Sensor maintenance is resource intensive. Techniques that lengthen the maintenance interval will improve measurements and conserve resources.
After a short introduction into one actual development in the field of chemical reaction engineering, the requirements resulting from the application of sensors in a chemical reactor are shown. Physical quantities of interest when investigating and running chemical reactions are specified. As an example, the implementation of a multi-channel temperature sensor is described. Due to the chosen sensor...
Calcium carbonate nanopowder is an important engineering material used for various painting and polymer-based composite additive and filler. The hydrophobic modification on surface of calcium carbonate nanopowder was performed by using three silane coupling agents: i.e. 3-Aminopropyl triethoxysilane (APTES), 3-mercapto-propyl triethoxysilane (MPTES) and 3-ATRP trimethoxysilane (KH570). The Fourier...
In order to research and development a novel antibacterial material which is used to deal with the drinking water, few-layered grapheme/benzalkonium chloride composite was prepared by introducing different content of quaternary ammonium salt into layered graphene, and the resulting composites were characterized by the FTIR, XRD, TGA and TEM. And minimum inhibitory concentration (MIC) was used to investigate...
This paper reports the feasibility of using two Malaysian agricultural residues without modification; unmodified sugarcane bagasse (UMSCB) and unmodified coconut coir (UMCC) for the removal of Cd(II) from aqueous solution under different experimental conditions. Effect of various process parameters; contact time, initial metal ion concentration and pH have been studied. The maximum Cd(II) adsorption...
An anionic MgAlNO3 layered double hydroxides (MgAlNO3-LDH) with Mg/Al molar ratio 4∶1, was investigated for its ability to adsorb an anionic dye, Reactive Orange 16 (RO16), with the objective of evaluating its suitability as an adsorbent. The experimental data were analyzed by the Langmuir and Freundlich adsorption models. Equilibrium data fitted well with Langmuir model for the concentration range...
Phenolic, flavonoid and tannin content of dried Pereskia bleo were investigated using the well established method via UV-Vis Spectrometry. Pereskia bleo has phenolic content the highest followed by flavonoid and tannin content. A study of antioxidant activities of dried sample of Pereskia bleo was carried out by using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay. The plant shows moderate antioxidant...
Two kinds of outfields (thermal and ultrasonic fields) were applied to pretreat the municipal sludge and the results were examined by the indexes of SCOD and PH. The “Hua's 0.618 optimization method” was used to find out the optimum conditions when the sludge was treated with the outfields independently and orderly. It can be seen from the results that as the temperature goes high and the treating-time...
Hydrogen production based on chemical looping combustion can obtain clean hydrogen with near zero emission of carbon dioxide. This technique can be auto-thermal, making it very promising for hydrogen production. In this paper, the interconnected fluidized beds were established for cold model study, and tests were carried out, aiming at providing some design information for the hot bench. Experiments...
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