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Bi-amino surface functionalized nanoparticles: Synthesis and binary system dye removal from wastewater containing anionic dyes
, Article Desalination and Water Treatment ; Volume 70 , 2017 , Pages 347-354 ; 19443994 (ISSN) ; Ghezelbash, M ; Ghotbei, C ; Kazemeini, M ; Sharif University of Technology
Desalination Publications
2017
Abstract
In this paper, copper oxide nanoparticle was synthesized, and its surface was modified using N-(2-aminoethyl)-3-(trimethoxysilyl)propylamine. The bi-amino surface functionalized nanoparticle (BASFN) was used to remove anionic dyes from single and binary systems. The scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, energy-dispersive X-ray spectroscopy (EDAX) and X-ray diffraction were used to characterize the nanoparticle. Direct Red 80 (DR80) and Direct Green 6 (DG6) were used as anionic dyes. The effect of adsorbent dosage, dye concentration and pH on dye removal was evaluated. Kinetic of dye adsorption on BASFN followed pseudo-second order. The results...
Nanofiltration process on dye removal from simulated textile wastewater
, Article International Journal of Environmental Science and Technology ; Volume 5, Issue 3 , 2008 , Pages 401-408 ; 17351472 (ISSN) ; Mirzayee, R ; Nasseri, S ; Borghei, M ; Gholami, M ; Torabifar, B ; Sharif University of Technology
CEERS
2008
Abstract
Dyestuffs removal from industrial wastewater requires special advanced technologies, since dyes are usually difficult to remove by biological methods. In this study nanofiltration process was used for removal of different dyestuffs from solutions. The rate of dye removal by spiral wound nanofiltration membrane in film thin composite MWCO=90 Dalton, was evaluated for four classes of dyes acidic, disperse, reactive and direct in red and blue dyes medium. Dye absorbance was measured by spectrophotometric method (2120 Standard Method 1998). Effects of feed concentration, pressure and total dissolved solids concentration were also studied. Results showed that increasing dye concentration lead to...
Use of modified bentonite for phenolic adsorption in treatment of olive oil mill wastewater
, Article Iranian Journal of Science and Technology, Transaction B: Engineering ; Volume 30, Issue 5 , 2006 , Pages 613-619 ; 03601307 (ISSN) ; Alemzadeh, I ; Vossoughi, M ; Sharif University of Technology
2006
Abstract
Natural and modified clays were applied as adsorbents for the removal of organic contaminants from wastewater. This study presents an investigation on the technical feasibility of using modified minerals that are named organoclay for treatment of dissolved substances, mainly polyphenols in olive mill wastewater. The different parameters such as applied cation dosage were effective on the removal of contaminants by these adsorbents (%CEC), pollutant concentration, pH and particle size of minerals. In this investigation bentonite particles were modified by stirring the clay with a long chain quaternary ammonium cation. Doses of the applied cation varied from zero to 1.5 times the clay CEC....
Treatment of welding electrode manufacturing plant wastewater using coagulation/flocculationnanofiltration as a hybrid process
, Article Brazilian Journal of Chemical Engineering ; Volume 28, Issue 1 , Mar , 2011 , Pages 73-79 ; 01046632 (ISSN) ; Mousavi, M ; Borghei, M ; Sharif University of Technology
Abstract
High water consumption and water scarcity make industrial wastewater reuse necessary, especially in those industries characterized by polluted effluents such as welding electrode manufacturing industries. The present paper investigates the coupling of coagulation-flocculation with nanofiltration (NF) to recycle water and reuse it in the process. First, the effect of different concentrations of a mixture of alum (Al2(SO4) 3.18H2O) and ferric chloride (FeCl3) on the pretreatment process was closely studied. Then the NF process was applied for complementary treatment. The NF results show that, by increasing both flow rate and transmembrane pressure (TMP), permeate flux is increased. The NF...
Experimental Studies on Petroleum Hydrocarbons Biodegradation in a Microbial Fuel Cell
, M.Sc. Thesis Sharif University of Technology ; Kariminia, Hamid Reza (Supervisor)
Abstract
Environmental issues are more and more considered because of increasing environmental pollution along the industrial growth. In recent years Microbial Fuel Cells (MFCs) have attracted attention of many researchers as a renewable source of clean energy. In this research, wastewaters of purified terephthalic acid (PTA) plant and polyethylene terephthalate (PET) plant were examined in MFC.
Voltage generation in the PTA MFC cycle indicated two steady phases. Produced power was 31.8 mW/m2 (normalized per cathode area) and calculated Coulombic efficiency was 2.05 % for COD removal of 74% during 21 days. Concentration changes of each pollutant indicated that acetic acid (AA) and benzoic acid...
Voltage generation in the PTA MFC cycle indicated two steady phases. Produced power was 31.8 mW/m2 (normalized per cathode area) and calculated Coulombic efficiency was 2.05 % for COD removal of 74% during 21 days. Concentration changes of each pollutant indicated that acetic acid (AA) and benzoic acid...
Removal of Cr(VI) by modified brown algae Sargassum bevanom from aqueous solution and industrial wastewater
, Article Journal of the Taiwan Institute of Chemical Engineers ; Volume 44, Issue 6 , 2013 , Pages 977-989 ; 18761070 (ISSN) ; Ahmadi, M ; Ghiasvand, M ; Kahrizi, S ; Katal, R ; Sharif University of Technology
2013
Abstract
The aim of this research work is to investigate sorption characteristic of acid treated brown algae Sargassum bevanom (acid treated S. bevanom) for the removal of Cr(VI) ions from aqueous solutions. The acid-treated alga was prepared by transferring the S. bevanom into 0.5. M HCl and then stirring the mixture at 300. rpm for 6. h at room temperature. The sorption of Cr(VI) ions by batch method is carried out. The optimum conditions of biosorption were found to be: a biomass dose of 0.7. g in 100. ml of Cr(VI), contact time of 110. min and pH 3, respectively. In optimum condition, removal efficiency was 89.64%. It was found that temperature has a positive effect on the removal efficiency....
Optimizing OLR and HRT in a UASB reactor for pretreating high- Strength municipal wastewater
, Article Chemical Engineering Transactions ; Volume 24 , 2011 , Pages 1285-1290 ; 19749791 (ISSN) ; Shayegan, J ; Sharif University of Technology
Abstract
This study was carried out for examination of a lab-scale UASB reactor for optimization of organic loading rate and hydraulic retention time. The total volume of the reactor was 5 1 with an effective height of 160 cm and diameter of 5 cm. This reactor was used to treat fortified municipal wastewater at volumetric organic loadings of 3.6, 7.2, 10.8, and 14.4 kg m3 d 1 at temperature 30°C. The result of present work indicated an optimum range for organic loading (7.2 to 10.8 kg m-3 d-1) with COD removal efficiency of about 85%. Moreover, optimum HRT for influent COD concentration of 1200mg/l is shown to be only 4 hours. Furthermore nitrate removal efficiency was about 80% at optimized organic...
Effect of adding nitrate on the performance of a multistage biofilter used for anaerobic treatment of high-strength wastewater
, Article Chemical Engineering Journal ; Volume 156, Issue 2 , 2010 , Pages 250-256 ; 13858947 (ISSN) ; Borja, R ; Bagheri, M ; Ali Monemian, S ; Goodarzi, V ; Tooyserkani, Z ; Sharif University of Technology
Abstract
This laboratory research was carried out to evaluate the performance of a multistage anaerobic biofilm reactor, with six compartments and a working volume of 70 L, for the treatment of a strong synthetic nitrogenous and high-strength wastewater at an operational temperature of 26 ± 0.5 °C. Initially, the performance of the reactor was studied when subjected to an increase in the hydraulic retention time (HRT) at a constant influent COD concentration of 10,000 mg/L. Five different HRTs were studied: 0.25, 0.67, 1, 3 and 5 days, which were equivalent to 6, 16, 24, 72 and 120 h, respectively. By increasing the HRTs from 6 h to 1 day, COD and BOD removal efficiencies were increased from 63% to...
Particle removal optimization in rotating dissolved air flotation used in paper-recycling wastewater treatment
, Article Water and Environment Journal ; 2021 ; 17476585 (ISSN) ; Amini Rad, H ; Borghei, S. M ; Vossoughi, M ; Rouhollahi, R ; Sharif University of Technology
John Wiley and Sons Inc
2021
Abstract
Rotating dissolved air flotation (RDAF) has been utilized for several decades in paper-recycling wastewater treatment; however, it has rarely been addressed in the literature, which makes research into this system challenging and complicated. However, in this work, a full-scale industrial wastewater treatment system for a paper-recycling mill in Mazandaran province, Iran, was evaluated. Experiments indicated that under the same wastewater and chemical conditions, there are differences in the removal efficiencies. This finding was investigated by conducting simulation in ANSYS CFX R18.0 and experimentation simultaneously. Thus, the main purpose of this research was to optimize the operation...
Developing the Model of Municipal Wastewater Treatment Plants with Energy Technologies and Environment Assessment
, M.Sc. Thesis Sharif University of Technology ; Saboohi, Yadollah (Supervisor)
Abstract
Regarding the reduction of high qualified and accessible resources, the waste water treatments are accounted as one of the main challenges in environmental context. Surprisingly, with or without consideration of this issue can lead to play the crucial key in whether development or society retardation. With developing and being more sophisticated of waste water treatment technology and also rising the stringency of environmental constraint, approaching the optimum technology basis economics of scale is time consuming and complicated.Behind this concept, contribution of this study is twofold. The general approach of treatment is identified using AHP methodology in primary stage. After that, it...
Kinetic modelling and performance prediction of a hybrid anaerobic baffled reactor treating synthetic wastewater at mesophilic temperature
, Article Process Biochemistry ; Volume 45, Issue 10 , 2010 , Pages 1616-1623 ; 13595113 (ISSN) ; Martín, A ; Borja, R ; Sharif University of Technology
2010
Abstract
A modelling study on the anaerobic digestion process of a synthetic medium-strength wastewater containing molasses as a carbon source was carried out at different influent conditions. The digestion was conducted in a laboratory-scale hybrid anaerobic baffled reactor with three compartments and a working volume of 54L, which operated at mesophilic temperature (35°C). Two different kinetic models (one model was based on completely stirred tank reactors (CSTR) in series and the other an axial diffusion or dispersion model typical of deviations of plug-flow reactors), were assessed and compared to simulate the organic matter removal or fractional conversion. The kinetic constant (k) obtained by...
Removal of lignin, COD, and color from pulp and paper wastewater using electrocoagulation
, Article Desalination and Water Treatment ; Volume 57, Issue 21 , 2016 , Pages 9698-9704 ; 19443994 (ISSN) ; Kariminia, H. R ; Safari, S ; Sharif University of Technology
Taylor and Francis Inc
2016
Abstract
Electrocoagulation is an effective, fast, and economic method for treatment of industrial wastewaters. In this study, effects of different parameters including electrolysis time, voltage, and pH on the reduction of chemical oxygen demand (COD), lignin, and color in pulp and paper wastewaters were studied. Iron and aluminum were used as anode and cathode electrodes, respectively. Under the optimal conditions (pH 5, 60 min, 10 V), this treatment method led to 85% removal of COD and 78.5% removal of lignin. Furthermore, clear treated water with complete color removal was generated that suggests the application of electrocoagulation for industrial wastewater treatment, especially in pulp and...
Screening of microorganisms for decolorization of treated distillery wastewater
, Article Iranian Journal of Science and Technology, Transaction B: Engineering ; Volume 32, Issue 1 , 2008 , Pages 53-60 ; 10286284 (ISSN) ; Shayegan, J ; Afshari, A ; Sharif University of Technology
2008
Abstract
The objective of this research work was to obtain a microorganism capable of decolorizing treated distillery wastewater (TDW). 21 isolated and procured microorganisms were screened for their percentage decolorization. The screening strategy was performed using three different culture media in two main steps. The primary screening was carried out in two stages. In the first stage 10 microorganisms had a lower than 25% decolorization of TDW (with 25% TDW concentration). In the second stage 8 microorganisms had more than a 48% decolorization of TDW. In the secondary screening all 3 different culture media, the effect of TDW concentration, pH and nitrogen source were studied. A fungus identified...
Biosorption of Uranium from Uranium Conversion Waste using Aspergillus Niger Fungus
, Ph.D. Dissertation Sharif University of Technology ; Roosta Azad, Reza (Supervisor) ; Yaghmaei, Soheyla (Co-Advisor)
Abstract
Presence of heavy metals in industrial waste has always been a serious environmental problem. One of such metals in uranium that is used in important industries such as nuclear industry. Thus, it must be excluded from industrial waste efficiently. This research aimed to study effect of local strain of aspergillus niger in bioabsoprtion of uranium from industrial waste in which good absorption was reached and absorption of local strain was compared with that of control strain obtained from PTCC. Also, local strain was collected from uranium anomalies of Bandar Abbas Mining Site and was used to identify it with reference strains available at NCBI site using PCR and proliferation of part of...
Municipal Wastewater Treatment Using Microalgal-Sludge System
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor) ; Mehrnia, Mohammad Reza (Supervisor)
Abstract
If wastewater is not properly treated, then the environment and human health can be negatively impacted. These impacts can include harm to fish and wildlife populations, oxygen depletion and contamination of drinking water. In the typical wastewater treatment process, the goal of primary, secondary and tertiary effluent treatment is to reduce or remove organic matter, solids, nutrients, disease-causing organisms and other pollutants from the treated wastewater before it is discharged to a body of water. Biological methods for wastewater treatment are much preferable for being more economical and environmentally friendly. Biological treatment of wastewater using algal-bacterial culture...
Optimization of anaerobic baffled reactor (abr) using artificial neural network in municipal wastewater treatment
, Article Environmental Engineering and Management Journal ; Vol. 13, Issue. 1 , 2014 , Pages 95-104 ; ISSN: 15829596 ; Jamshidi, S ; Hazrati, H ; Sharif University of Technology
Abstract
This study is focused on simulating and optimizing design and configuration of anaerobic baffled reactor (ABR) by means of artificial neural network (ANN). This approach is aimed to assess an efficient ABR performance in various operational conditions treating municipal wastewater. For this purpose, to analyze comprehensively on a base of experimental data, the system is operated in two pilots of 48 liters net volume made of 8 compartments. In 7 months, more than 130 sets of data are obtained to be introduced to MATLAB neural network. These include removal efficiency of chemical oxidation demand (COD) and volatile fatty acids (VFAs) parameters. The finest correlative architecture obtained...
A triple fouling layers perspective on evaluation of membrane fouling under different scenarios of membrane bioreactor operation
, Article Journal of Environmental Health Science and Engineering ; Volume 12, Issue 1 , June 2014 ; Torkian, A ; Hashemian, S. J ; Bakhshi, B ; Sharif University of Technology
Abstract
One of the main factors affecting membrane fouling in MBRs is operational conditions. In this study the influence of aeration rate, filtration mode, and SRT on hollow fiber membrane fouling was investigated using a triple fouling layers perspective. The sludge microbial population distribution was also determined by PCR method. Through various applied operational scenarios the optimal conditions were: aeration rate of 15 LPM; relaxation mode with 40s duration and 8 min. interval; and SRT of 30 days. The similarity between SMP variations in triple fouling layers with its corresponding hydraulic resistance confirmed the effect of SMP on membrane fouling. Among three fouling fractions, the...
Biodegradation of cyanide by a new isolated strain under alkaline conditions and optimization by response surface methodology (RSM)
, Article Journal of Environmental Health Science and Engineering ; Vol. 12, issue. 1 , 2014 ; Yaghmaei, S ; Nejad, Z. G ; Sharif University of Technology
Abstract
Background: Biodegradation of free cyanide from industrial wastewaters has been proven as a viable and robust method for treatment of wastewaters containing cyanide. Results: Cyanide degrading bacteria were isolated from a wastewater treatment plant for coke-oven-gas condensate by enrichment culture technique. Five strains were able to use cyanide as the sole nitrogen source under alkaline conditions and among them; one strain (C2) was selected for further studies on the basis of the higher efficiency of cyanide degradation. The bacterium was able to tolerate free cyanide at concentrations of up to 500 ppm which makes it a good potentially candidate for the biological treatment of cyanide...
Rapid start-up and improvement of granulation in SBR
, Article Journal of Environmental Health Science and Engineering ; Volume 13, Issue 1 , 2015 ; 2052336X (ISSN) ; Shayegan, J ; Rezasoltani, S ; Sharif University of Technology
BioMed Central Ltd
2015
Abstract
Abstract Background: The aim of this study is to accelerate and improve aerobic granulation within a Sequencing Batch Reactor (SBR) by cationic polymer addition. Methods: To identify whether the polymer additive is capable of enhancing granule formation, two SBRs (R1 and R2, each 0.15 m in diameter and 2 m in height) are used by feeding synthetic wastewater. The cationic polymer with concentration of 30 to 2 ppm is added to R2, while no cationic polymer is added to R1. Results: Results show that the cationic polymer addition causes faster granule formation and consequently shorter reactor start-up period. The polymer-amended reactor contains higher concentration of biomass with better...
Enhancing sonocatalytic properties of TiO2 nanocatalysts by controlling the surface conditions: effect of particle size and PVA modification
, Article Desalination and Water Treatment ; Volume 57, Issue 58 , 2016 , Pages 28378-28385 ; 19443994 (ISSN) ; Madaah Hosseini, H. R ; Ordikhani, F ; Mokhtari Dizaji, M ; Sharif University of Technology
Taylor and Francis Inc
2016
Abstract
The influence of particle size and surface modification on sonocatalytic activity of TiO2 nanoparticles was investigated by measuring the degradation efficiency of methyl orange (MO) as a model pollutant. Crystalline TiO2 nanoparticles with different particles and aggregate size were prepared through solution-phase method with varying synthesis temperatures. Coating with polyvinyl alcohol was performed to enhance colloidal stability of the particles over a wide range of pH values (1.5–7.5). Characterization was carried out using X-ray diffraction, high-resolution transmission electron microscopy, dynamic light scattering, and Fourier-transformed infrared techniques. It was found that...