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Full-Text Articles in Engineering
Statistical Modeling And Optimization Of Process Parameters For 2, 4-Dichlorophenoxyacetic Acid Removal By Using Ac/Pdmaema Hydrogel Adsorbent: Comparison Of Different Rsm Designs And Ann Training Methods, Irvan Dahlan, Emilia Eizleen Md Azhar, Siti Roshayu Hassan, Hamidi Abdul Aziz, Yung-Tse Hung
Statistical Modeling And Optimization Of Process Parameters For 2, 4-Dichlorophenoxyacetic Acid Removal By Using Ac/Pdmaema Hydrogel Adsorbent: Comparison Of Different Rsm Designs And Ann Training Methods, Irvan Dahlan, Emilia Eizleen Md Azhar, Siti Roshayu Hassan, Hamidi Abdul Aziz, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
In this study, the response surface methodology (RSM) and artificial neural network (ANN) were employed to study the adsorption process of 2,4-dichlorophenoxyacetic acid (2,4-D) by using modified hydrogel, i.e., activated carbon poly(dimethylaminoethyl methacrylate) (AC/PDMAEMA hydrogel). The effect of pH, the initial concentration of 2,4-D and the activated carbon content on the removal of 2,4-D and adsorption capacity were investigated through the face-centered composite design (FCCD), optimal design and two-level factorial design. The response surface plot suggested that higher removal of 2,4-D and adsorption capacity could be achieved at the higher initial concentration of 2,4-D and lower pH and activated carbon …
Comparison Of Dye Wastewater Treatment Methods: A Review., Bukola M. Adesanmi, Yung-Tse Hung, Howard Paul, Christopher Huhnke
Comparison Of Dye Wastewater Treatment Methods: A Review., Bukola M. Adesanmi, Yung-Tse Hung, Howard Paul, Christopher Huhnke
Civil and Environmental Engineering Faculty Publications
Wastewater is produced by numerous dyes producing and dye consuming industries in their process activities especially the textile industry. These effluents become toxic and harmful to the living things and the environment if not properly treated before being discharged to the environment. In recent decades dye wastewater has been becomes a growing water pollution problem because it is one of the most difficult to treat. To put an end to this problem, viable, efficient, and sustainable method of treatment of dye wastewater and color removal needs to be established. Several research papers have been done over the years on various …
Synthetic Wastewater Treatment Using Agro-Based Adsorbents, Saisantosh Vamshi Harsha Madiraju, Yung-Tse Hung, Howard Paul
Synthetic Wastewater Treatment Using Agro-Based Adsorbents, Saisantosh Vamshi Harsha Madiraju, Yung-Tse Hung, Howard Paul
Civil and Environmental Engineering Faculty Publications
This study was undertaken to determine the treatment a binary mixture of dye wastewater (containing Naphthol Green B) and the sugar industry wastewater for removal of color. The specific treatment in the current research consists of adsorption using low-cost adsorbents and microfiltration using Whatman-41 microfilters. Considerations of this treatment process are to take the samples using batch adsorption and avoid coagulation with further dilution. Numerous runs are made, with the ideal waste samples prepared in the laboratory. As a 1st step in the study, different dye concentrations are considered using different concentrations of sugar wastewater. Samples are treated with 3 …
Treatment Of Combined Acid Black 48 And Coffee Wastewater By Low-Cost Adsorbents, Yung-Tse Hung
Treatment Of Combined Acid Black 48 And Coffee Wastewater By Low-Cost Adsorbents, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
© 2020, Kaunas University of Technology. All rights reserved. Removal of synthetic dyes from wastewater is essential both from the environmental and human health point of view. A small concentration of synthetic dyes can reduce water transparency and consequently influence photosynthesis and alter aquatic ecosystems. Acid black 48 is an Azo dye that falls under the category of synthetic dyes used in the textile industry. With dyes, coffee wastewater has high chemical oxygen demand (COD) that can affect dissolved oxygen (DO) in surface waters. A mixture of wastes in surface waters creates a need to investigate the efficiency of existing …
The Effectiveness Of Silica Sand In Semi-Aerobic Stabilized Landfill Leachate Treatment, Ezlina Othman, Mohd Suffian Yusoff, Hamidi Abdul Aziz, Mohd Nordin Adlan, Mohammed J.K. Bashir, Yung Tse Hung
The Effectiveness Of Silica Sand In Semi-Aerobic Stabilized Landfill Leachate Treatment, Ezlina Othman, Mohd Suffian Yusoff, Hamidi Abdul Aziz, Mohd Nordin Adlan, Mohammed J.K. Bashir, Yung Tse Hung
Civil and Environmental Engineering Faculty Publications
© 2010 by the authors. This study examines the suitability of natural silica sand as a low-cost adsorbent for the removal of ammoniacal nitrogen and heavy metals, particularly iron and zinc, from semi-aerobic stabilized landfill leachate. Leachate samples were collected from the Pulau Burung landfill site (PBLS) in Penang, Malaysia. The above-mentioned contaminants are highlighted in this study because of their unsafe concentrations at PBLS. The effects of shaking time, settling time, and silica sand dosage on the study parameter removal efficiencies were investigated to predict the performance of the process. The adsorptions of ammoniacal nitrogen, iron, and zinc were …
Doug Ruthven And Jorg Karger: Their Individual And Collective Contributions To The Field Of Zeolite Science And Engineering, Dhananjai B. Shah
Doug Ruthven And Jorg Karger: Their Individual And Collective Contributions To The Field Of Zeolite Science And Engineering, Dhananjai B. Shah
Chemical & Biomedical Engineering Faculty Publications
Prof. Doug Ruthven and Prof. Jörg Kärger are two giants in the field of zeolite science and engineering. Over their academic careers encompassing almost forty years each, they have contributed significantly to the advancement of fundamental understanding of adsorption and diffusion in zeolites as well as their industrial applications. The author, in the beginning of his academic career, had an opportunity to spend two years as a post-doctoral fellow in Prof. Ruthven’s laboratory at the University of New Brunswick (1975–1977). This experience actually motivated me to spend my academic career in working in the field of zeolite adsorption and …
Equilibrium Studies And Kinetics Mechanism For The Removal Of Basic And Reactive Dyes In Both Single And Binary Systems Using Edta Modified Rice Husk, Siew-Teng Ong, Weng-Nam Lee, Pei-Sin Keng, Yung-Tse Hung, Sie-Tiong Ha
Equilibrium Studies And Kinetics Mechanism For The Removal Of Basic And Reactive Dyes In Both Single And Binary Systems Using Edta Modified Rice Husk, Siew-Teng Ong, Weng-Nam Lee, Pei-Sin Keng, Yung-Tse Hung, Sie-Tiong Ha
Civil and Environmental Engineering Faculty Publications
The potential of using ethylenediamine tetraacetic acid modified rice husk (ERH) to remove different types of dyes, namely basic and reactive dyes were studied. Sorption characteristic of ERH showed that it was pH dependent. The kinetics of sorption for both dyes was rapid within the first 60 min regardless of its initial concentration. Using the pseudo-second order kinetics model, the predicted uptakes of Methylene Blue (MB) and Reactive Orange 16 (RO16) agreed closely with experimental values obtained. Three isotherm models were used to fit with equilibrium data, namely Langmuir, Freundlich and BET models. It was found that the equilibrium fitted …
Tartaric Acid Modified Rice Hull As A Sorbent For Methylene Blue Removal, Siew Teng Ong, Pei Sin Keng, Ai Wen Chong, Siew Ling Lee, Yung Tse Hung
Tartaric Acid Modified Rice Hull As A Sorbent For Methylene Blue Removal, Siew Teng Ong, Pei Sin Keng, Ai Wen Chong, Siew Ling Lee, Yung Tse Hung
Civil and Environmental Engineering Faculty Publications
Problem statement: Improper dye discharge from various industries such as textile, paper, cosmetic and plastics into receiving streams can be one of the sources towards water pollution. The release of these effluents not only causes various disruptions in the ecosystems, but also poses hazard effect as most of the dyes are highly toxic, mutagenic and carcinogenic in nature. Approach: To prepare an inexpensive and efficient sorbent by chemically modifying rice hull for the removal of Methylene Blue (MB) which is predominantly used in coloring acrylic fiber. Batch experiments were carried out for the removal of MB from aqueous solution by …
Adsorption Of Lactic Acid From Fermentation Broth And Aqueous Solutions On Zeolite Molecular Sieves, Isam H. Aljundi, Joanne M. Belovich, Orhan Talu
Adsorption Of Lactic Acid From Fermentation Broth And Aqueous Solutions On Zeolite Molecular Sieves, Isam H. Aljundi, Joanne M. Belovich, Orhan Talu
Chemical & Biomedical Engineering Faculty Publications
The recovery of lactic acid from fermentation broth and aqueous solutions was studied by adsorption on Silicalite molecular sieves. Batch experiments were used to measure the adsorption isotherms of the lactic acid on Silicalite. A linear correlation was found for both solutions. Silicalite showed a higher adsorptive capacity in the case of the aqueous solution than that of the fermentation broth. Henry’s constants were estimated as Formula Not Shown and Formula Not Shown for the aqueous and broth solutions, respectively. The effect of temperature on adsorption was also studied in batch mode. Henry’s constant dependency on …
Activity Coefficients Of Adsorbed Mixtures, Orhan Talu, Jianmin Li, Alan L. Myers
Activity Coefficients Of Adsorbed Mixtures, Orhan Talu, Jianmin Li, Alan L. Myers
Chemical & Biomedical Engineering Faculty Publications
Experimental and simulated data for adsorption of gas mixtures on energetically heterogeneous surfaces like activated carbon and zeolites exhibit negative deviations from ideality. The deviations are large in some cases, with activity coefficients at infinite dilution equal to 0.1 or less. Similar molecules form ideal mixtures, but molecules of different size or polarity are nonideal. Equations for bulk liquid mixtures (Wilson, Margules, etc.) do not apply to isobars for adsorbed mixtures. A two-constant equation for activity coefficients as a function of composition and spreading pressure is in good agreement with theory, simulation, and experiment.