scholarly journals Synthesis and application of magnetized nanoparticles to remove lead from drinking water: Taguchi design of experiment

2020 ◽  
Vol 10 (1) ◽  
pp. 56-65
Author(s):  
Muhammad Irfan Jalees
Keyword(s):  
Drinking Water ◽  
Design Of Experiment ◽  
Xrd Analysis ◽  
Taguchi Design ◽  
Global Network ◽  
Response Analysis ◽  
Contour Maps ◽  
Taguchi Design Of Experiment ◽  
Adsorption Condition ◽  
Good Potential

Abstract Contamination in drinking water from heavy metals like Pb2+ has severe effects on health. In this study, potato peel (PP) was used as the substrate and magnetic iron nanoparticles (MI) were deposited on PP using a co-precipitated method. Fourier transformation infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis confirmed the deposition of MI on PP. The L16 (4^4) method of Taguchi design of experiment (DOE) was used for the optimization of adsorption condition, i.e., at 6 pH, 10 min of contact time, and a dose of 15 g/L can give more than 90% removal efficiency of Pb2+ using PP-MI. Contour maps, Taguchi response analysis, and analysis of variance (ANOVA) suggested that pH has a dominant contribution in the removal of Pb2+. The adsorption process was favorable, spontaneous, and exothermic in nature and was followed by pseudo second order kinetics. A comparison of the sorption capacity of PP-MI for Pb2+ with literature values suggested that PP-MI has good potential for the removal of Pb2+. This article has been made Open Access thanks to the generous support of a global network of libraries as part of the Knowledge Unlatched Select initiative.

scholarly journals Surface and Morphological Investigation of Synthesized Nanostructured Ridges from Electrospun Polyvinyl Alcohol-Albumin Blend—A Taguchi Design of Experiment Approach

Fibers ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 29
Author(s):  
Jopeth Ramis ◽  
Bryan Pajarito ◽  
Crisneil Natividad ◽  
Mark Jared Van Ocampo ◽  
Crizaldy Tugade ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Flow Rate ◽  
Design Of Experiment ◽  
Surface Characterization ◽  
Taguchi Design ◽  
Root Mean Square Roughness ◽  
Solution Flow Rate ◽  
Radius Of Curvature ◽  
Solution Flow ◽  
Taguchi Design Of Experiment

We report the synthesis of presumably a “nanoridge” from the electrospinning of a hydrophilic polymer–protein blend. The material exhibits vertical elevation from the substrate, distinct from the morphologies seen in electrospinning. It is hypothesized that the formation of the nanostructured ridges is due to the migration of the charged protein to the apex through a highly polarized electric field in electrospinning conditions. In this study, we assessed the polyvinyl alcohol–egg albumin (PVA–EA) system in a solvent comprising of water, formic and acetic acid, together with the tip-to-collector distance (TCD) and solution flowrate. To quantify the factor effects in the surface properties of the material, a Taguchi design of experiment was used. The ridge heights observed ranged from 84.8–639.9 nm, and the material height is predominantly affected by the PVA–EA ratio and solution flow rate. The root mean square roughness was influenced by the TCD and flow rate, which has values ranging from 11.37–57.56 nm. In evaluating the sharpness of the ridge, we used the radius of curvature, where the TCD highly affects the apex sharpness. The work offers not just a likely new class of morphology, but a new perspective on the surface characterization of an electrospun material which could affect the performance of such a use in biological and physical systems.

scholarly journals Taguchi Design of Experiment Enabling the Reduction of Spikes on the Sides of Patterned Thin Films for Tunnel Junction Fabrication

MRS Advances ◽  
2017 ◽  
Vol 2 (52) ◽  
pp. 3025-3030 ◽  
Author(s):  
Pawan Tyagi ◽  
Edward Friebe ◽  
Beachrhell Jacques ◽  
Tobias Goulet ◽  
Stanley Travers ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Tunnel Junction ◽  
Design Of Experiment ◽  
Optimum Combination ◽  
Taguchi Design ◽  
Uv Exposure ◽  
Taguchi Design Of Experiment ◽  
Edge Profile ◽  
Patterned Films

ABSTRACTPhotolithographically patterned thin films often possess unwanted spikes along the side edges. These spikes are a significant issue for the development of spinvalve memory, tunnel junction based molecular devices, and micro-electromechanical systems. Here, we report a very simple, economical, and fast way of creating an optimum photoresist profile for the production of spike-free patterned films. This approach is based on performing a soaking step in the positive-photoresist’s developer solution before the UV exposure. However, the success of this method depends on multiple photolithography factors: photoresist thickness (governed by spin speed), soft baking temperature, soaking time in developer, and exposure time. In this paper, we report our systematic experiments to study the effect of these factors by following the L9 experimental scheme of the Taguchi Design of experiment (TDOE) approach. The L9 experiment scheme effectively accommodated the study of four photolithography factors, each with three levels. After performing photolithography as per L9 TDOE scheme, we sputter deposited 20 nm Tantalum to check the side edge profile of the patterned film by atomic force microscope (AFM). We measured the heights of the spikes along the thin film edges. We utilized spike height as the desired property and chose “smaller the better” criteria for the TDOE analysis. TDOE enabled us to understand the relative importance of the parameters, relationship among the parameters, and impact of the various levels of the parameters on the thin film edge profile. TDOE analysis yielded an optimum combination of levels for the four photolithography factors. The optimum combination of photolithography factors included spin speed 4000 rpm, 100 °C soft baking temperature, 60 sec pre-soaking in the developer solution, and 15 sec UV exposure. We validated the TDOE by AFM and observed spike free patterned films. We also made complete tunnel junction devices by utilizing the optimized photolithography factors for the bottom electrode and obtained excellent tunneling behavior. In summary, this study provides a very simple, economical, and fast photolithography approach for creating optimum photoresist profile for the micro-nano scale devices and electromechanical structures.

Optimization of Injection Molding Process Parameters Based on Taguchi Design of Experiment

2012 ◽  
Vol 233 ◽  
pp. 335-338
Author(s):  
Xue Feng Li ◽  
Hong Bin Liu
Keyword(s):  
Design Of Experiment ◽  
Optimization Design ◽  
Mold Temperature ◽  
Taguchi Design ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Taguchi Design Of Experiment ◽  
Filling Time ◽  
Warpage Deformation

In this paper, circulating box cover is taken as the main object of the study with the application of Taguchi design of experiment and Moldflow software. The warpage deformation was obtained under different molding conditions including melt temperature, mold temperature, filling time and packing time. The influencing degree and trend of these parameters was studied by using the rang analysis, and the optimization set of factors was obtained. Experimental results show that the optimization design is effective and the warpage of the product reduce.

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