scholarly journals Removal of Copper from Water Solutions by Adsorption on Spruce Sawdust

Proceedings ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 52 ◽  
Author(s):  
Zdenka Kovacova ◽  
Stefan Demcak ◽  
Magdalena Balintova
Keyword(s):  
Wastewater Treatment ◽  
Low Cost ◽  
Cost Effective ◽  
Peat Moss ◽  
Human Beings ◽  
Cost Effective Method ◽  
Negative Impacts ◽  
Major Factors ◽  
Scientific Attention

Pollution of water by toxic elements is one of the major factors of concern for human health, as well as for environmental quality, and draws a large amount of scientific attention. New and cheaper methods of wastewater treatment are increasing the quality of the environment and reducing the negative impacts on fauna, flora, and human beings. The sorption technique is considered a cost effective method for effectively removing heavy metals. During the past few years, there have been increasing studies dedicated to using low-cost adsorbents like bark, tannin-rich materials, lignin, chitosan peat moss, and sawdust. The presented paper describes the adsorption behavior of spruce wood sawdust. In order to determine its applicability for wastewater treatment, copper removal from model solutions was studied.

THEORETICAL ANALYSES FOR LASER MACHINING MICROCHANNELS AND DEMONSTRATION OF THEIR USES IN MANUFACTURE OF A MICROFLUIDIC OPTICAL SWITCH

2006 ◽  
Vol 13 (06) ◽  
pp. 795-802 ◽  
Author(s):  
DANIEL LIM ◽  
ERNA GONDO SANTOSO ◽  
KIM MING TEH ◽  
STEPHEN WAN ◽  
H. Y. ZHENG
Keyword(s):  
Fluid Flow ◽  
Optical Switch ◽  
Low Cost ◽  
Microfluidic Devices ◽  
Cost Effective ◽  
Laser Machining ◽  
Machining Parameters ◽  
Flow Channels ◽  
Cost Effective Method ◽  
Theoretical Analyses

Silicon has been widely used to fabricate microfluidic devices due to the dominance of silicon microfabrication technologies available. In this paper, theoretical analyses are carried out to suggest suitable laser machining parameters to achieve required channel geometries. Based on the analyses, a low-power CO 2 laser was employed to create microchannels in Acrylic substrate for the use of manufacturing an optical bubble switch. The developed equations are found useful for selecting appropriate machining parameters. The ability to use a low-cost CO 2 laser to fabricate microchannels provides an alternative and cost-effective method for prototyping fluid flow channels, chambers and cavities in microfluidic lab chips.

scholarly journals Synchronous fluorescence as a green and selective tool for simultaneous determination of bambuterol and its main degradation product, terbutaline

2018 ◽  
Vol 5 (10) ◽  
pp. 181359 ◽  
Author(s):  
Samah Abo El Abass ◽  
Heba Elmansi
Keyword(s):  
Degradation Product ◽  
Low Cost ◽  
Reference Method ◽  
Cost Effective ◽  
Zero Crossing ◽  
Cost Effective Method ◽  
Validation Parameters ◽  
Main Degradation Product ◽  
20 Nm

A green, sensitive and cost-effective method is introduced in this research for the determination of bambuterol and its main degradation product, terbutaline, simultaneously, relying on the synchronous spectrofluorimetric technique. First derivative synchronous spectrofluorimetric amplitude is measured at Δ λ = 20 nm, so bambuterol can be quantitated at 260 nm, and terbutaline can be measured at 290 nm, each at the zero crossing point of the other. The amplitude–concentration plots were linear over the concentration ranges of 0.2–6.0 µg ml −1 and 0.2–4.0 µg ml −1 for both bambuterol and terbutaline, respectively. Official guidelines were followed to calculate the validation parameters of the proposed method. The low values of limits of detection of 0.023, 0.056 µg ml −1 and limits of quantitation of 0.071, 0.169 µg ml −1 for bambuterol and terbutaline, respectively, point to the sensitivity of the method. Bambuterol is a prodrug for terbutaline, and the latter is considered its degradation product so the established method could be regarded as a stability-indicating one. Moreover, the proposed method was used for the analysis of bambuterol and terbutaline in their single ingredient preparations and the results revealed statistical agreement with the reference method. The suggested method, being a simple and low-cost procedure, is superior to the previously published methods which need more sophisticated techniques, longer analysis time and highly toxic solvents and reagents. It could be considered as an eco-friendly analytical procedure.

scholarly journals A Prospectus for Inclusion: Project study for a potential education solution for Syria’s Persons with Disability (PwDs)

2019 ◽  
Author(s):  
Ammar AlMustafa ◽  
Ahmad Alashkar
Keyword(s):  
Project Management ◽  
Cost Effective ◽  
Public Agencies ◽  
Project Study ◽  
Governmental Organizations ◽  
Non Governmental Organizations ◽  
Cost Effective Method ◽  
Innovative Solution ◽  
Access And Quality

The article proposes an innovative solution to the problems in the access and quality of STEM concepts education to Persons Living with Disability (PwD) in Syria. A project management-based approach is detailed below for a cost-effective method to be implemented by non-governmental organizations or public agencies.

Biodegradable Waste a Nutrient Asset for Upholding Soil Health and Crop Production

2020 ◽  
pp. 36-51
Author(s):  
Ifra Ashraf ◽  
Shazia Ramzan ◽  
Nowsheeba Rashid ◽  
Ikhlaq A. Mir ◽  
Asima Jillani
Keyword(s):  
Waste Disposal ◽  
Crop Production ◽  
Abiotic Factors ◽  
Soil Health ◽  
Solid Wastes ◽  
Human Beings ◽  
Management Technology ◽  
Negative Impacts ◽  
Environmentally Sound

Management of solid wastes is a grave concern because of its associated significant negative impacts on quality of the environs. Accretion and putrefaction of solid wastes have potent hazardous effects on biotic and abiotic factors of the environment including human beings. Unmanaged solid wastes especially organic in nature add efficient quantity of greenhouse gases in the atmosphere. For dealing with wastes purely organic in nature, there is a need of an adequate waste management technology to reduce the quantity of organic waste being disposed of traditionally. Composting is an environmentally sound and sustainable approach to manage biodegradable fractions of solid waste. It has received considerable attention in the last few decades because of its potential of redressing the environmental pollution concerns associated with other waste disposal methods. This chapter is aimed to review supremacy of composting over other waste disposal methods.

Joining Dissimilar Materials Using Friction Stir Scribe Technique

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Piyush Upadhyay ◽  
Yuri Hovanski ◽  
Saumyadeep Jana ◽  
Leonard S. Fifield
Keyword(s):  
Low Cost ◽  
Dissimilar Materials ◽  
Cost Effective ◽  
High Volume ◽  
Industrial Applications ◽  
Critical Pathway ◽  
Friction Stir ◽  
Design Engineers ◽  
Cost Effective Method ◽  
Polymer Metal

Development of a robust and cost-effective method of joining dissimilar materials could provide a critical pathway to enable widespread use of multimaterial designs and components in mainstream industrial applications. The use of multimaterial components such as steel-aluminum and aluminum-polymer would allow design engineers to optimize material utilization based on service requirements and could often lead to weight and cost reductions. However, producing an effective joint between materials with vastly different thermal, microstructural, and deformation responses is highly problematic using conventional joining and/or fastening methods. This is especially challenging in cost sensitive, high volume markets that largely rely on low cost joining solutions. Friction stir scribe (FSS) technology was developed to meet the demands of joining materials with drastically different properties and melting regimes. The process enables joining of light metals like magnesium and aluminum to high temperature materials like steel and titanium. Viable joints between polymer composites and metal can also be made using this method. This paper will present the state of the art, progress made, and challenges associated with this innovative derivative of friction stir welding (FSW) in reference to joining dissimilar metals and polymer/metal combinations.

scholarly journals Microbiological Quality of Drinking Water in Sachets Sold in the City of Yaoundé in Cameroon: Tests of Sensitivity to the Antibiotics of Bacteria Isolated

2020 ◽  
Vol 8 (1) ◽  
pp. 27
Author(s):  
Nguepidjo Gilbert ◽  
Kapso Tchouankep Mireille ◽  
Ngong Ankiambom Innocent ◽  
Tonmeu Douyong Chimène Sandrine ◽  
Enoka Patrice ◽  
...  
Keyword(s):  
Drinking Water ◽  
Low Cost ◽  
Bacterial Species ◽  
Microbiological Quality ◽  
Positive Culture ◽  
Human Beings ◽  
Salmonella Spp ◽  
Cross Sectional ◽  
The City

Water is the basic drink for human beings and drinking water in sachets is very popular because of its relatively low cost and availability. The aim of this study is to determine the bacteriological profile of sachet drinking water sold in the city of Yaounde. It was a descriptive cross-sectional study covering the period from March to June 2019, carried out in the application laboratory of ETMS-Yaounde. A total of 230 samples of drinking water in sachets purchased in different markets in the city of Yaounde were analyzed using Mac Conkey's flooding method. The identification was done on the API 20 E Gallery and the susceptibility test on Mueller Hinton media. The size of the sample was 230 packaged sachet drinking water and 213 of the 230 revealed 92% of positive culture of germs, and only 17 samples gave a negative culture, at a percentage of 8% of isolated germs. The isolated bacterial species and their respective abundances in samples were Enterobacter gergoviae (3%), Klebsiella pneumoniae (5%), Proteus mirabilis (5%), Serratia fonticola (5%), Salmonella choler arizonae cloacae (8%), Salmonella spp. (8%), Enterobacter cloacae (10%), Staphylococcus aureus (10%), Pseudomonas aeruginosa (18%) and Staphylococcus epidermidis (28%). All these tested germs were resistant to Amoxicillin and Erythromycin and 70% of tested germs were sensitive to Gentamycin. Overall, the results revealed poor microbiological quality of these waters. This exposes consumers to health risks, and it is important to inform and sensitize consumers about the risks involved, to educate producers and to control their activities by the health services.

scholarly journals Study of Blended Waste Organic Extracts in Wastewater Treatment

2019 ◽  
Vol 31 (5) ◽  
pp. 1013-1016
Author(s):  
J.B. Veeramalini ◽  
B. Bharathiraja ◽  
S. Raghu Vinayak ◽  
R. Vignesh ◽  
S.K. Raghul
Keyword(s):  
Wastewater Treatment ◽  
Microbial Growth ◽  
Cost Effective ◽  
Particulate Material ◽  
Composite Fibre ◽  
Treatment Processes ◽  
Organic Extracts ◽  
Before And After ◽  
Micro Organisms

In present work, water treatment processes is carried out by an affordable, readily usable and non-chemical method. This study involved the process of water may reduce the concentration of particulate matter that includes suspended particles, micro organisms, a range of dissolved and particulate material derived from the surfaces. The substances used in this work were coarsely blended with each other and a special composite fibre filter was made. Several processes variables of quality of waste are also measured before and after the treatment. Results show that the water quality has been enriched in several ways such as reduction in the dissolved solids, pH has been controlled, deodorization and prevention of microbial growth. Hence use of this work has been utilized as a “Homemaker Model” and act as an alternative method for wastewater treatment in a cost effective way.

Development of Calibration Equipment for Geodetic Angle Measurement Instruments

2015 ◽  
Vol 220-221 ◽  
pp. 396-400
Author(s):  
Lauryna Šiaudinytė ◽  
Deividas Sabaitis ◽  
Domantas Bručas ◽  
Gintaras Dmitrijev
Keyword(s):  
Low Cost ◽  
Cost Effective ◽  
Angle Measurement ◽  
Measurement Instruments ◽  
Measurement Systems ◽  
Complex Processes ◽  
Cost Effective Alternative ◽  
Reducing Costs ◽  
The Cost

Production of high precision circular scales is a complicated process requiring expensive equipment and complex processes to achieve. Precision angle measurement equipment tends to be very expensive and therefore not accessible to all in need. Simplification of production of such devices can lead to reducing costs of angle measurement systems ensuring easier accessibility. A new method of producing precision circular scales using low cost mass production can reduce the costs of these devices drastically. Therefore, utilising a common CD technology as the basis for such scales is analysed. This paper deals with the analysis of the newest laser cutting method for plastic circular scales. Preliminary results of manufacturing such scales are presented in the paper as well as measurements of the grating of the scale were performed. The quality of different scales manufactured using different laser types is analysed in the study. The cost – effective alternative of manufacturing circular scales is discussed in the paper.

Measuring the Equivalent Series Resistance of the Low Impedance Electrolytic Capacitors in Pulsed Current State

2013 ◽  
Vol 333-335 ◽  
pp. 122-125
Author(s):  
Xu Fei Wang ◽  
Kai Xie ◽  
Teng Li ◽  
Zhong Qun Li ◽  
Rong Bin Guo
Keyword(s):  
Series Resistance ◽  
Cost Effective ◽  
Calibration Method ◽  
Pulsed Current ◽  
Equivalent Series Resistance ◽  
Circuit Implementation ◽  
Electrolytic Capacitors ◽  
Current State ◽  
Cost Effective Method

A cost-effective method for quickly evaluating the equivalent series resistance (ESR) of electrolytic capacitors is proposed. This approach has the ability to measure the low ESR of milliohms level, meanwhile provide the pulsed testing current up to hundreds of amperes. Therefore, this method is suitable for fast inspecting the quality of bulk capacitors. The operational principle, circuit implementation and the calibration method are presented, and the performances of the prototype are tested, which validate the proposed scheme.

scholarly journals High-Quality, Cost-Effective Strategy for Detection of Autoantibodies to Extractable Nuclear Antigens

2001 ◽  
Vol 8 (3) ◽  
pp. 471-474 ◽  
Author(s):  
Tri G. Phan ◽  
Watson W. S. Ng ◽  
Dana Bird ◽  
Kara Smithers ◽  
Vicky Wong ◽  
...  
Keyword(s):  
Cost Effective ◽  
Turnaround Time ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Quality Cost ◽  
Nuclear Antigens ◽  
Cost Effective Method ◽  
Meaningful Result ◽  
Clinical Diagnoses

ABSTRACT We evaluated methods for the detection of autoantibodies to extractable nuclear antigens (ENAs) to determine the strategy that yielded the most cost effective and clinically meaningful result. We prospectively compared counterimmunoelectrophoresis (CIEP) with and without serum prediffusion (SPD) and found that SPD significantly improved the quality of precipitation lines. This resulted in a decreased requirement for repeat testing and, consequently, was associated with a significant decrease in reagent costs and specimen turnaround time. We also retrospectively compared reactivity by CIEP, CIEP plus SPD, enzyme-linked immunosorbent assay (ELISA), and line immunoassay (LIA) of 52 serum samples that were previously determined to be positive for ENAs, and we correlated the results with clinical diagnoses. There was significant agreement among CIEP, CIEP plus SPD, ELISA, and LIA for the detection of anti-SS-A, anti-SS-B and anti-RNP. In general, CIEP, CIEP plus SPD, and LIA correlated better with the clinical diagnoses than ELISA, even though ELISA detected anti-ENAs more often than the other methods. CIEP plus SPD is therefore the most cost effective method for the identification of clinically meaningful ENAs. Based on our experience, we now screen for ENAs by CIEP, and positive samples are then typed by CIEP plus SPD. Samples that are difficult to interpret are then further assessed by an alternative method.

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