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1866 articles for “hexavalent chromium (Cr+6)” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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Using of the sea grasses for the removal of some industrial organic dyes; bromo cresol purple from aqueous solutions
Abstract: Abstract: The objectives of this study are evaluating the efficiency of low cost adsorbents of activated carbon obtained from sea grasses. Using the sea grasses for the removal of some industrial organic dye; bromo cresol purple indicators from aqueous solutions and studying the impact of some of the factors including different dosages , pH, different concentrations, different temperature and effect of time of adsorbed materials. Adsorption efficiency of dye onto …
Published in Emerging Trends in Chemical Engineering · Vol. 6, Issue 3, 2019 · pp. 29–36 Read article
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Effect of the U.V. Irradiation on the Aqueous Solution of Dye (i.e. Cresol Purple)
Abstract: This study aimed to estimate the effect of the U.V. irradiation on the aqueous solution of cresol purple. Then study the effect of the activation energy of each electron transfere on the absorbance and λmax values. The absorbance and λmax values of the selective λmax solutions were chanced in most solutions, where the U.V radiation gave different values at different irradiation periods, most of solution gave low values of absorbance …
Published in Emerging Trends in Chemical Engineering · Vol. 8, Issue 1, 2021 · pp. 30–35 Read article
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Phytoextraction of Lead and Chromium by Leafy Vegetables (Lettuce, Kale and Swiss Chard)
Abstract: This research was carried out to assess the accumulation of Cr and Pb in leafy vegetables (lettuce, kale and Swiss chard) in their harvestable part and root from artificially polluted soil with Pb and Cr. Soil sample was characterized for its pH, organic matter (OM), cation exchange capacity (CEC), electrical conductivity (EC) and texture. Soil sample digested by mixture of HNO3 and HClO4 was analyzed. Pb accumulation in shoot was …
Published in Journal of Catalyst & Catalysis · Vol. 3, Issue 3, 2016 · pp. 26–36 Read article
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Safety Issues with Tower Crane and Remedial Measures
Abstract: Tower cranes are the focus of execution on today’s typical building construction sites. Tower crane has to hoist and transport a variety of loads near and above people, under crowded conditions, occasionally with overlapping work zones, and often within time, budget, and labor constraints. This leads to the safety risk on sites that are intrinsically hazardous. This paper identifies the major factors affecting safety of tower-crane and evaluates the degree …
Published in Journal of Construction Engineering, Technology & Management · Vol. 4, Issue 2, 2014 · pp. 14–21 Read article
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Effect of Cryogenic Treatment on Wear Characteristics of T42 High Speed Steel
Abstract: In this study cryogenic treatment is performed on AISI T42 HSS material and its wear characteristics are studied. Test of treated and untreated samples is taken on pin on disc wear testing machine at different loads and RPMs. The wear of the sample is measured. The wear resistance of the samples is also measured by weight loss method. The results are tabulated. An experimental effort to evaluate tool wear improvement …
Published in Journal of Materials & Metallurgical Engineering · Vol. 6, Issue 2, 2016 · pp. 70–79 Read article
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An Investigation on Effect of Welding Current Mode on Weld Quality Characteristics of Microplasma Arc Welding of Inconel 625 Sheets
Abstract: Nickel alloys have gathered wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resistance, such as metal bellows used in expansion joints in aircraft, aerospace and petroleum industry. In case of single-pass welding of thinner sections of this alloy, pulsed current microplasma arc welding was found beneficial due to its advantages over the conventional continuous current process. The paper focuses on studying the effect of …
Published in Journal of Materials & Metallurgical Engineering · Vol. 3, Issue 2, 2013 · pp. 8–13 Read article
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Study of Crude Oil Degradation Using Bio-stimulant: The Concept of Remediation Application
Abstract: The Total Petroleum Hydrocarbon (TPH) degradation was monitored in a batch reactor with the addition of bio-stimulants of palm oil processed waste water (POPWW) and NPK fertilizer in contaminated clay soil medium. The comparative study on the performance of both bio-simulants revealed that the NPK fertilizer was more effective than the palm oil processed waste water (POPWW). This study is based on the overview on the degradation of petroleum hydrocarbon …
Published in Journal of Petroleum Engineering & Technology · Vol. 13, Issue 2, 2023 · pp. 13–23 Read article
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Simulation Analysis of RSW on Nugget Diameter on CRCA Steel Sheet
Abstract: In spot welding process, in the industry, prime concern is adequate strength and good spot weld considering aesthetic looks with less power consumption. Strength is function of properties of material and nugget diameter is also function of properties of material. So to achieve strength there must be analysis of nugget diameter and break load both experimentally and analytically with help of software and actual testing of sheet metal spot welds. …
Published in Journal of Production Research & Management · Vol. 9, Issue 1, 2019 · pp. 31–35 Read article
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A Review of Business Process Re-engineering with Focus on Critical Success and Failure Factors
Abstract: This paper presents a literature review of business process re-engineering (BPR). Although there are a number of BPR articles in the literature, there is still lack of literature review in this field that focuses on the success and failure factors behind implementing BPR. The drive of this review is to gain a basic as well as greater understanding of the critical success and failure factors in implementing BPR. In doing …
Published in Journal of Production Research & Management · Vol. 7, Issue 2, 2017 · pp. 1–7 Read article
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A Model of Bidding in Rotating Saving Credit Associations
Abstract: The paper analyzes bidding behavior in discount bidding Roscas under the assumption of risk neutrality. Roscas are group based revolving financial schemes. In discount bidding Roscas, individuals bid for a lumpsum. We find that bids submitted by members in equilibrium are increasing in the returns or opportunities for investment. Further, members submit lower bids when credit is available outside Rosca at expensive rates. A bidding Rosca is efficient as an …
Published in Journal of Production Research & Management · Vol. 7, Issue 1, 2017 · pp. 11–15 Read article
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Study of Influence of Corrosion and Cracking on Bond Behavior of Reinforced Concrete Member
Abstract: Reinforced concrete, as composite material has occupied special place in the modern construction of different type of structure. Reinforced concrete is inherently durable and near maintenance free construction material. Service life of reinforced concrete structure can be significantly reduced when the corrosion of reinforcing steel is initiated; the product of corrosion expands and occupies greater volume than original volume of steel, eventually causes cracking of concrete. The composite action of …
Published in Journal of Structural Engineering and Management · Vol. 4, Issue 2, 2017 · pp. 58–67 Read article
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Morphological and Dielectric Relaxation Responses of Polymer Stabilized Ferroelectric Liquid Crystal Composite Films
Abstract: Polymer-stabilized ferroelectric liquid crystal (GH-PSFLC) composite films have been prepared by polymerization-induced phase separation (PIPS) process as a function of polymer concentration. Epoxy polymer was homogeneously dispersed into FLC host matrix to create fibril network in the composite films. Twisted fibril-like network was observed through polarizing optical microscope through transmission mode. Dielectric relaxation spectroscopy of these composites shows that real part of permittivity decreases with polymer concentration. Goldstone relaxation mode …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 2, Issue 2, 2015 · pp. 8–12 Read article
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Acetoxylation of o, m Cresol by Electrochemical Process at Graphite Electrode
Abstract: Electrochemical processes remain unique because of the nature of specific products formed and their mode of formation in which current is a reactive input in place of redox reagents. The high yields of the products can be obtained by designing and optimizing the electrolysis. The ordinary chemical procedures are multi-staged and may result poor yields. Therefore the best way for minimizing the pollution is transformation of conventional chemical processes to …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 3, 2021 · pp. 13–21 Read article
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Performance of Integral Bridge by Addition of Cross Girders
Abstract: The bridges without expansion joints are Integral Abutment bridges (IAB’s). In conventional bridges, the bearings are generally corroded due to water seepage through joints which are avoided in IAB’s. However there will be stresses developed due to thermal induced movements of the bridge which is to be taken into account. In this paper, finite element analysis is carried out using STAAD ProV8i on a typical model of IAB. Here various …
Published in Recent Trends in Civil Engineering & Technology · Vol. 3, Issue 1, 2013 · pp. 35–46 Read article
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The Influence of Sediment Deposits in the Threshold Criteria of Sediment Movement in Rigid Boundary
Abstract: An effort is made to develop a simplified methods for the estimation of bed shear stress for rigid boundary for initiation of sediment motion using different bed thickness, bed slopes and different sediment particles diameters (ranging between (0.5mm < d50 < 4.78). The findings were compared with the earlier studies demonstrating that critical shear parameter value for fixed beds is less than the reported values in literature. This come in …
Published in Recent Trends in Civil Engineering & Technology · Vol. 11, Issue 3, 2021 · pp. 31–39 Read article
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Smart Dustbin with Scrap Crusher for Office Premises
Abstract: AbstractWaste management has become a vital issue today. Daily observation has shown that waste often gets accumulated due to irregular removal of waste from the dustbin. A solution to such a problem is a ‘Smart Dustbin’. This will help to overcome the negligence either shown by people to throw the waste in dustbin or by the authorities to clear the dustbin at regular interval of time. The smart dustbin has …
Published in Recent Trends in Electronics Communication Systems · Vol. 5, Issue 2, 2018 · pp. 28–34 Read article
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Growth, XRD, FTIR and Second Order NLO studies of Undoped and Zinc Sulphate doped L-Histidine Single Crystals
Abstract: AbstractSingle crystals of pure (undoped) L-histidine and Zinc sulphate doped L-histidine have been synthesized and grown by slow evaporation method using water as the solvent. These grown crystals are characterized by FTIR, XRD and SHG. From Fourier transform infrared (FTIR) spectral analysis, the various functional groups present in the sample have been confirmed. The X-ray diffraction (XRD) study ensures that the grown crystal crystallizes in the orthorhombic system and the …
Published in Trends in Opto-electro & Optical Communication · Vol. 8, Issue 3, 2018 · pp. 31–36 Read article
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Performance Enhancement of Laser based Modern Railway Mobile Platform Crossing System
Abstract: AbstractIn this work, the modern railway mobile platform crossing system is improved through the proper computation of GaInP based 635 nm multiple quantum well red laser maintaining the perfect peak intensity of the power which is achieved at 635 nm. By analyzing the performance of the designed Ga0.5In0.5P/ (Al0.5Ga0.5)0.5In0.5P edge emitting laser the peak material gain is obtained. Sustaining threshold current of 6.7 mA, a maximum resonance frequency of 10 …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 1, 2014 · pp. 23–28 Read article
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Light straightening, super-collimation, strong beaming, extraordinary refraction and splitting in Photonic Crystals
Abstract: This paper reviews light straightening, super-collimation, strong beaming, extraordinary refraction and splitting in photonic crystals and stratified structures. The light straightening finds potential applications in design of optical devices. The super collimation and strong beaming can be utilized in optical integrated circuits. The extra-ordinary refraction can be utilized in sub wavelength imaging and information propagation. The splitting can be used in optical instrumentation and optical tuning. All these phenomena are …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 1, 2022 · pp. 1–4 Read article
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Cryptography of 5th Generation Network Security Attacks in D2D Communication: A Review
Abstract: Cryptography is the science for hiding the secret information. Cryptography is a technique/method that allows data to be sent in a secret and a secure form. In the present era, 5G technology is the most prominent technology in the network domain. However, it was said to be available in 2020, but still there are many views of expected features, benefits, and threats in 5G. 5G is a promising technology that …
Published in Journal of Communication Engineering & Systems · Vol. 13, Issue 1, 2023 · pp. 15–24 Read article