Volume 2, Issue 1, (2014)
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A Review of
Self-healing Concrete Research Development Volume 2, Issue 1, Pages: 1-11 | [Full Text] PDF (147 KB) |
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Amirreza Talaiekhozan1,2, Ali Keyvanfar5, Arezo Shafaghat5, Ramin Andalib3, M.Z Abd Majid3, Mohamad Ali Fulazzaky1, Rosli Mohamad Zin3, Chew Tin Lee4, Mohd Warid Hussin3, Norhaliza Hamzah3, Nur Fatimah Marwar3, H.I. Haidar3 |
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1- Institute of Environmental and Water Resources Management, Water Research Alliance, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor Bahru, Malaysia. 2- Department of Civil and Environmental Engineering, Jami Institute of Technology, Isfahan, Iran. 3- Construction Research Alliance, Faculty of Civil engineering, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor Bahru, Malaysia. 4- Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. 5- Postdoctoral Researcher, Research Management Center, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia.
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Abstract — Self-healing
concretes are being widely recognized as a remedial technique to improve the
durability of concrete. Although, few review papers on self-healing concrete
were published, a strong review on all aspects of self-healing concrete
cannot be found. In this paper, natural, chemical and biological processes of
self-healing concrete technologies were completely reviewed. The main focus
of the study is for the biological processes. The review presents a new
insight into the research for the treatment of unexpected cracking of
concrete. The information presented in this paper can be considered
significant for biotechnologists and bioprocess engineers to have
comprehensive updates on the current status-quo of self-healing concrete. |
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Keywords
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Self-healing concrete, chemical self-healing
process, biological self-healing process, biological precipitation |
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-------------------------------------------------------------------------------- Evaluation of
Formaldehyde Adsorption by Human Hair and Sheep Wool in Industrial Wastewater
with High Concentration Volume 2, Issue 1, Pages: 12-17 | [Full Text] PDF (320 KB) |
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Poyan Ghanbarnejad5,
Amin Goli1, Benyamin Bayat5, Habib
Barzkar2, Amirreza Talaiekhozani3,6,
Marzieh Bagheri5, Sanaz
Alaee4 |
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1- Jami Institute of Technology, Department of Mechanical Engineering, Isfahan, Iran. 2- MSc of Azad university of Quechan, Department of food industries, Quechan, Iran. 3- 6- Institute of Environmental and Water Resources Management, Water Research Alliance, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor Bahru, Malaysia. 4- Shiraz University Medical Sciences, School of Advanced Medical Sciences and Technologies, Department of Reproductive Biology, Shiraz, Iran. 5- Jami Institute of Technology, Department of Chemical Engineering, Isfahan, Iran. 6- Jami Institute of Technology, Department of Civil and Environmental Engineering, Isfahan, Iran. |
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Abstract — One of such
pollutants which can be detected in many different industrial wastewaters is
formaldehyde. The biological treatment of wastewater contaminated with
formaldehyde is very difficult due to its antibacterial property. However the
removal of formaldehyde using adsorption process such as activated carbon is
possible but it may be expensive. The main aim of this study is the
adsorption of formaldehyde on human hair and sheep wool as an adsorbent.
Human hair and sheep wool are cheap and they can be disposed by common
methods such as incineration. In this study, the concentration of
formaldehyde in wastewater was measured during the adsorption process using
chemical oxygen demand method (COD). Then the effects of different parameters
such as pH, temperature, hydraulic retention time, formaldehyde
concentration, and weight of human hair and sheep wool were evaluated.
Finally, based on our results, optimum values of the parameters were
investigated. The obtained results showed that formaldehyde can be adsorbed
on human hair significantly. Also it was revealed that formaldehyde can be
removed from wastewater during 5 min, and the increase of hydraulic retention
time from 5 to 25 min is not effective on formaldehyde adsorption efficiency.
The results elaborated that, formaldehyde adsorption efficiency using white
hair, colored hair by chemical colors or natural ones (e.g. Henna), and sheep
wool is as efficient as common human hair. The results attained from this
research showed that using human hair or sheep wool for removing formaldehyde
from industrial wastewater is possible. |
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Keywords
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Formaldehyde, Adsorption process,
Human hair, Formalin, Sheep wool. |
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-------------------------------------------------------------------------------- Evaluation of
Nitrate Removal from Wastewater Using Electrochemical Method Volume 2, Issue 1, Pages: 18-21 | [Full Text] PDF (111 KB)
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Zahra Abaspoor1, Amin Goli2,
Amirreza Talaiekhozani3,4*, Benyamin
Bayat1, Poyan ghanbarnejad1, Marzieh Bagheri5, Sanaz
Alaee6, Gholamreza Ziaee7 |
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1- Jami Institute of Technology, Department of Chemical Engineering, Isfahan, Iran. 2- Jami Institute of Technology, Department of Mechanical Engineering, Isfahan, Iran. 3- Jami Institute of Technology, Department of Civil Engineering, Isfahan, Iran. 4- Institute of Environmental and Water Resources Management, Water Research Alliance, UniversitiTeknologi Malaysia, UTM Skudai, 81310 Johor Bahru, Malaysia. 5- Jami Institute of Technology, Department of Chemical Engineering, Isfahan, Iran. 6- Department of Reproductive Biology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran. 7- Jami Institute of Technology, Department of Accountancy, Isfahan, Iran. |
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Abstract — Groundwater
pollution by nitrate is a serious problem that has been widely observed
worldwide. This type of pollution can be dangerous for human health and especially
for children. Therefore, nitrate must be removed from contaminated
underground. Electrochemical method has many advantages in comparison with
reverse osmosis or ion exchange, such as lower cost, requires less space,
less sludge production and requires fewer chemical materials. The aim of this
study is to evaluate nitrate removal by electrochemical method. Carrying out
this study; water samples contaminated with nitrate were prepared by adding
suitable amount of NaNO3 in distilled water. Then samples were treated by a
batch of electrochemical reactor in laboratory-scale. In this study,
graphical rods were applied as electrodes. Nitrate concentration was
determined by spectrophotometric method. The
results showed that by using electrochemical method 15.33, 17.41, 19.48 and
21.58 % of nitrate ion could be removed within hydraulic retention times of
30, 60, 90 and 120 min, respectively. These results were obtained by using a
voltage of 24 volts and electrode surface of 15.896 cm3. Our results elaborated
that, electrochemical method is fully capable of removing nitrate ion from
water. However, nitrate removal efficiency in this method is not efficient
enough to apply in industrial scale. |
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Keywords
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Nitrate removal, electrochemical
method, water treatment, and water well. |
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-------------------------------------------------------------------------------- Mock Theta
Conjectures Volume 2, Issue 1, Pages: 19-22 | [Full Text] PDF (127 KB) |
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Sabuj Das1, Haradhan Kumar Mohajan2 |
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1- Senior Lecturer, Department of Mathematics, Raozan University College, Bangladesh. 2- Premier University, Chittagong, Bangladesh. |
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Abstract — This paper shows
how to prove the two Theorems first and second mock theta conjectures
respectively. |
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Keywords
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Mock theta, rank of
partition. |
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-------------------------------------------------------------------------------- Evaluation of wastewater
treatment contaminated with formaldehyde by using activated carbon prepared
from cypress leaf Volume 2, Issue 1, Pages: 23-27 | [Full Text] PDF (138 KB)
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Amin Goli1 , Poyan
Ghanbarnejad2, Benyamin Bayat2, Zahra Abaspur2,
Zakiye Norozzade2, Mohammad Frotan3,
Amirreza Talaiekhozani4,5 |
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1. Jami Institute of Technology, Department of Mechanical engineering, Isfahan, Iran. 2. Jami Institute of Technology, Department of Chemical Engineering, Isfahan, Iran. 3. University of Hakim Sabzevari, Department of Geography and Urban Planning, Sabzevar, Iran. 4. Jami Institute of Technology, Department of Civil Engineering, Isfahan, Iran. 5. Institute of Environmental and Water Resources Management, Water Research Alliance, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor Bahru, Malaysia.
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Abstract — Rising standards
of effluent discharge to the environment has led many researches to look for
more effective and at the same time, economical treatment methods.
Utilization of Activated carbon, as an effective and economical method, could
be a helpful solution in this regard. The purpose of this study is to
investigate the preparation of activated carbon from cypress tree leaves and
its abilities in treatment of formaldehyde contaminated wastewater. Besides
investigating the adsorption ability of the adsorbent, the effects of various
parameters such as pH, retention time, Formaldehyde concentration and
temperature were also investigated. Test results obtained from this study
demonstrate that the most efficient condition for formaldehyde removal by the
adsorbent is on the temperature of 10 C, retention time of 5 minutes and pH
equal to 7 which led to a 98% formaldehyde removal. According to the survey
conducted in this study it can be concluded that the utilization of activated
carbon, obtained from the cypress tree leaves, is an efficient and economical
solution in the removal of toxic waste such as formaldehyde.
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Keywords
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Formaldehyde, Adsorption,
Formalin, Cypress leaf |
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