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458 articles for “concentration”
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Analysis of the Degradation of Total Petroleum Hydrocarbons (TPH) in a Polluted Stagnant Salt and Fresh Water Environment
Abstract: TPH dispersion in both water media was investigated using a transport model that included convective and diffusion factors. This model was used to track the TPH concentration in both vertical and horizontal dimensions. Therefore, it was expected that diffusion alone would regulate TPH transport or spreading in the x-direction, or horizontal direction, while diffusion and convection caused by gravity would control TPH transport in the vertical direction. As a result, …
Published in International Journal of Chemical Separation Technology · Vol. 9, Issue 2, 2023 · pp. 1–12 Read article
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Response Surface Methodology to Optimize Deproteinization of Green Crab Shells (Carcinus maenas)
Abstract: The crab shells are used as a feedstock for the extraction of either chitin or chitosan and other bioactive materials such as dyes and proteins. The optimum conditions are required for a process development for an effective separation of chitin. The most important parameters for deproteinization of green crab shells have identified the concentration of NaOH, temperature and time of contact. The optimum conditions for deproteinization of Green crab shells …
Published in International Journal of Chemical Engineering and Processing · Vol. 3, Issue 2, 2017 · pp. 30–37 Read article
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Application of Taguchi Method for Optimization of Reaction Parameters in Graft Copolymerization onto Guar Gum
Abstract: In this article, Taguchi method is used to theoretically optimize the various reaction parameters and their interactions that may affect the end properties of Guar Gum Grafted copolymers made in a laboratory glass reactor. An attempt has been made to assess and predict the effect of temperature, monomer (Acrylonitrile) concentration and Guar Gum concentration on % grafting. In the present study effect of above mentioned three reaction parameters on the …
Published in International Journal of Chemical Engineering and Processing · Vol. 3, Issue 2, 2017 · pp. 12–18 Read article
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Continuous Counter-current Liquid–Liquid Extraction in a Packed Column: Experiments and Simulations using Aspen Plus
Abstract: The liquid–liquid two-phase mass transfer in a packed column was examined by varying acetic acid concentrations in the feed, solvent to feed flow rate S/F ratio using random packing. The overall volumetric mass transfer coefficient, percentage extraction, Number of Transfer Units were determined quantitatively. Simulation results were validated with experimental data and optimization of number of stages was done by using Aspen Plus. From the results obtained in the packed …
Published in International Journal of Chemical Engineering and Processing · Vol. 7, Issue 2, 2021 · pp. 1–9 Read article
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Physico-Mechanical Performance of Waste Plant Fiber Reinforced Thermoplastic Composites for Automotive Applications
Abstract: To maximize the interfacial bond strength, it is necessary to investigate the direct relationship between the degree of fiber-matrix adhesion and the mechanical and fracture behavior of composites. In this work, the strength of the interfacial bond between polypropylene (PP) and waste plant fiber (Dharose plant fiber, DF) that have been subjected to ultraviolet radiation (UV) was established. By using hot press molding, unidirectional composites of PP with dharose plant …
Published in International Journal of Chemical Engineering and Processing · Vol. 9, Issue 1, 2023 · pp. 14–24 Read article
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Bioethanol Production from Corncob Cellulosic Biomass: RSM and ANN based Optimization for Dilute Acid Pretreatment
Abstract: To increase the yield of fermentable sugars, the complexity of lignocellulosic biomass requires a pretreatment method. Dilute acid hydrolysis was used to efficiently pretreatment corn cobs. The aim of this study was to characterize corncob and investigate the effect of process parameters on total reducing sugar (TRS) yield during dilute acid hydrolysis pretreatment of corncob biomass. The morphology and microstructure of the samples were examined using an X-ray diffraction machine, …
Published in International Journal of Chemical Engineering and Processing · Vol. 9, Issue 2, 2023 · pp. 16–34 Read article
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Monitoring the Effect of Temperature on Percentage of Petroleum Hydrocarbon Remediation in Packed Bed Units using Agro-Based Adsorbents
Abstract: This research demonstrates the significance of adsorbent and packed bed unit or column for the treatment of water medium contaminated with petroleum hydrocarbon. The investigation further revealed the effect of temperature on the performance of the adsorbent in treatment of water medium contaminated with petroleum hydrocarbon. The investigation delved deeper into understanding the influence of temperature on the adsorbent's efficacy in treating water mediums contaminated with petroleum hydrocarbon. The study …
Published in International Journal of Chemical Engineering and Processing · Vol. 9, Issue 2, 2023 · pp. 35–47 Read article
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Bioremediation of Polluted Drainage with Petroleum Hydrocarbon
Abstract: This research was aimed at examining the petroleum product discharge in drainage within Port Harcourt City, samples were collected and mixed. Microbial analysis and physicochemical properties of the sample were determined. The sample was subjected into bioremediation after culturing of the microorganisms isolated, identified and characterized. The two microorganisms used are pseudomonas aeruginosa and aspergillus niger. The results obtained revealed high concentration for heavy crude oil than mixed crude oil; …
Published in International Journal of Environmental Chemistry · Vol. 7, Issue 2, 2021 · pp. 24–34 Read article
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Impact of Solid Waste Disposal on Soil Physicochemical Parameters and Selected Enzyme Activities: A Case Study from Nekede Dumpsite, Nigeria
Abstract: This study assessed the influence of solid waste disposal on soil physicochemical parameters in Nekede dumpsite Owerri, Imo state Nigeria. The study area is a solid waste dumpsite located between latitude 5° 25' 59.99"N and longitude 7°01'60.00"E DMS coordinates along No. 1 old Nekede road and beside the Otamiri river. The study area was partitioned into four (4) quadrants while facing the river with samples collected at three (3) different …
Published in International Journal of Environmental Chemistry · Vol. 9, Issue 2, 2023 · pp. 40–49 Read article
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Predictive Modelling of a Bioreactor for the Production of Ethanol Using Palmwine
Abstract: This research focuses on the feasibility of biochemical technology with yeast cells (Sacccharomycees cerevisiae) for continuous ethanol production from palm wine. This was carried out in a non-isothermal batch reactor at constant room temperature. 1.5L of palm wine solution was reacted with dry active baker’s yeast until reaction was completed. Biomass, ethanol and glucose concentration were sampled every two hours, and kinetic rate parameters for the fermentation calculated using concentration/time …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 5, Issue 2, 2019 · pp. 1–8 Read article
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A study of mesomorphic properties of Rod shaped 1, 2, 4-triazine integrated imine compounds
Abstract: Synthesis of typical rod-like liquid crystals has a great interest in numerous applications. The model has a terminal chain attached to only one end of the central rigid core. At the other end of the rigid core is a functional group that can be either polar or nonpolar. There are three kinds of rod-like liquid crystal, in this segment applies specifically to materials with template designs. Generally, terminal groups which …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 8, Issue 2, 2022 · pp. 16–25 Read article
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Valorization of agro-industrial waste into bioethanol: a case of brewers spent grain
Abstract: AbstractThe global impetus to produce alternatives to petroleum-based fuels and value-added chemicals to reduce greenhouse gases are putting pressure on the industries to diversify and valorize byproducts. By-products valorization of the brewery industry such as spent grain has given critical attention for long-term socio-economic and environmental benefits. Brewer`s spent grain is the major by-product of the brewing industry, represses around 85% of the total by-product generated. In the current work, …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 6, Issue 1, 2020 · pp. 1–20 Read article
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Impact of COVID-19 on Air Quality Index in Mumbai City
Abstract: Air pollution is a problem which has been consistently growing all around the world. Mumbai city has witnessed increase in air pollution through several decades. COVID-19 has been a ray of hope where the pollution levels have been reported lower than usual in several cities in India owing to the curbs which have been extended since march 2019 in India and in several other countries A short term reduction in …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 7, Issue 2, 2021 · pp. 17–25 Read article
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Examining the Rate of Change of Some Physicochemical Properties of a Polluted Water Environment as a Result of Crude Oil Spill
Abstract: This study was designed to look at how the physicochemical characteristics of the aquatic environment changed as a result of crude oil spillage. Samples were collected for analysis of physicochemical parameters, Total Dissolved Oxygen, Total Bacteria Counts (TBC) and Total Petroleum Hydrocarbon (TPH) content etc., for a period 84 days at 14 days intervals. Over the course of the analysis, the value of oil & grease varied between sampling points …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 9, Issue 1, 2023 · pp. 29–34 Read article
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Kinetics and Mechanisms of the Reduction of Some Carbonyl Compounds with Sodium Dithionite in Aqueous Alkaline Medium
Abstract: Kinetics of the reduction of some carbonyl compounds (acetophenone, benzophenone, benzaldehyde, and salicylaldehyde) with sodium dithionite was studied at 28± 0.5oC and basic concentration in the range of 0.01 to 0.05 mol dm-3 (NaHCO3). Under these conditions, the reaction rates were found to be first order with respect to sodium dithionite as plot of log kobs versus log [S2O42-] showed linearity to about 95% extent of reaction, however, the overall …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 2, Issue 2, 2016 · pp. 11–19 Read article
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Novel method for determination of kinetic constants from dynamics in a batch reactor with constant heat input rate
Abstract: In this article a novel method of obtaining reaction kinetic constants is described. It consists of measuring both concentration and temperature dynamics in a batch reactor supplied with a constant heat input rate. A system of esterification reaction between acetic acid and methanol in the presence of a cationic resin catalyst is studied. This reversible reaction’s rate is modeled by molecular order and as pseudo homogeneous assumption. By just one …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 5, Issue 1, 2019 · pp. 19–23 Read article
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Mechanical Behavior of Fly Ash Concrete A Critical Review
Abstract: Concrete structure is the most common all over the world. Cement is the major ingredient of concrete. Though the raw materials needed for manufacture of cement are available in most parts of the world, many countries have severe shortage of cement, although their needs are vast. The search for suitable substitute for cement, either partially or fully, has thus become a challenge for planning the development of many of the …
Published in International Journal of Concrete Technology · Vol. 7, Issue 1, 2021 · pp. 29–43 Read article
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An Investigation on Aggregate Distribution in Concrete
Abstract: Falling behavior is generally studied by mathematicians. The first study is conducted by Comte de Buffon with name “Falling needles experiment” and is widely known. Buffon researched the falling needle behavior finding the fall of needles in relation with Pi. However, although aggregates are fallen to the mould in cement paste, falling behaviour of concrete is rarely studied considering the statistical parameters of the fall.Accordingly, an experimental study is conducted …
Published in International Journal of Concrete Technology · Vol. 7, Issue 2, 2021 · pp. 1–8 Read article
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Assessment of Chloride Content in Plaster in Residential Buildings
Abstract: This study investigated the impact of chloride on building as per the age. Concrete samples were collected from buildings of different ages to measure chloride concentration. Findings revealed that chloride content increased with building age, potentially leading to decreased strength and damage. The research identified a significant concern of chloride-induced corrosion in older buildings, as chloride concentration increased with building age. To enhance the durability and safety of aging structures, …
Published in International Journal of Concrete Technology · Vol. 9, Issue 1, 2023 · pp. 35–40 Read article
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Impact of Microcrack Healing Techniques on Resilient behavior of Asphalt Concrete
Abstract: Concentrated efforts on the development of innovative materials and techniques for asphalt pavement repair are going on, many of them related to crack healing. Flexible pavement usually practices repeated loading and environmental impacts and suffers distresses throughout its service life. Microcracks initiates and can heal itself under controlled conditions. In this Concentrated efforts on thedevelopment of innovative materials and techniquesfor asphalt pavement repair are going on, many of them related …
Published in International Journal of Transportation Engineering and Traffic System · Vol. 6, Issue 1, 2020 · pp. 33–41 Read article