نتایج جستجو برای ' UES '

 A numerical solution of steady-state heat conduction problems is obtained using the strong form meshless point collocation (MPC) method. The approximation of the field variables is performed using the Moving Least Squares (MLS) and the local form of the multiquadrics Radial Basis Functions (LRBF). The accuracy and the efficiency of the MPC schemes (with MLS and LRBF approximations) are investigated through variation (i) of the nodal distribution type used, i.e. regular or irregular, ensuri...

 Resin fractionation (XAD-8), high performance size exclusion chromatography (HPSEC) UV260 and 280 nm and HPSEC-fluorescence techniques were used to characterise very hydrophobic acid (VHA) and slightly hydrophobic to hydrophilic (Non-VHA) compounds in treated wastewater from a Pinus radiata (Sulfite) pulp and paper mill that incorporates aerated stabilisation basins (ASBs). The use of these techniques enabled a rigorous evaluation of ASB performance with coagulation pre-trea...

Poly(acrylic acid) grafted multiwall carbon nanotubes (MWCNT-g-PAA) was synthesized by using plasma techniques, and was applied as a adsorbent to remove Co(II) from aqueous solution. Fourier transferred infrared spectroscopy (FT-IR) and thermo gravimetric analysis (TGA) demonstrate that poly(acrylic acid) was successfully grafted on the surface of MWCNTs. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that the bulk properties of MWCNTs were not changed after p...

 With increasing production and application of carbon nanotubes (CNTs), the interaction between CNTs and natural organic matter (NOM) in water has been attracting more and more concerns. In this study, adsorption of three NOM analogues including salicylic acid (SA), phthalic acid (PA) and catechol (CA) on multi-walled carbon nanotubes (MWCNTs) as well as commercial powdered activated carbon (PAC) were investigated. All adsorption isotherms were fitted well by Freundlich isotherm model (R2ad...

 In the present study, the use of low cost zeolitic materials (CZBFA and ECZBFA) derived from bagasse fly ash (BFA), has been investigated as a substitute of expensive methods for the sequestration of Cu(II) and Ni(II). The BFA and zeolitic sorbents were well characterized by XRF, FTIR, PXRD, and SEM instrumental methods, which proves the chemical constituents, functional groups and morphology of the sorbents. The metal sorption capacities of synthesized zeolitic and native material were de...

 The aim of the present work was to find a suitable Kraft cooking process for olive tree pruning (OTP), in order to produce pulp of kappa number about 17. The Kraft pulp produced under optimized conditions showed a viscosity of 31.5 mPa·s and good physical, mechanical, and optical properties, which are suitable for paper production. The physical–mechanical and optical properties were measured before and after bleaching. Although the OTP pulp was bleached to 90.9% ISO brigh...

This study reports the sequestration of Cd(II) and Hg(II) using a new biosorbent, Nauclea diderrichii seed biomass. Experimental data obtained were fitted into kinetic and thermodynamic models. Experimental data fitted best into pseudo-second order kinetic model among others. Results obtained kinetically revealed that the biosorption of Cd(II) and Hg(II) using N. diderrichii seed biosorbent increased with increase in temperature. At the highest temperature, which was 333 K, the highest amount of...