Journal of Environmental Treatment Techniques (JETT)

 

Volume 2, Issue 1, (2014)

 

Table of Contents

 

A Review of Self-healing Concrete Research Development

Volume 2, Issue 1, Pages: 1-11 | [Full Text] PDF (147 KB) | HTML format | XML format

 

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

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.

 

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.

 

Keywords 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)

 

 

Poyan Ghanbarnejad5, Amin Goli1, Benyamin Bayat5, Habib Barzkar2, Amirreza Talaiekhozani3,6, Marzieh Bagheri5, Sanaz Alaee4

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.

 

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.

 

Keywords 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)

 

Zahra Abaspoor1, Amin Goli2, Amirreza Talaiekhozani3,4*, Benyamin Bayat1, Poyan ghanbarnejad1, Marzieh Bagheri5, Sanaz Alaee6, Gholamreza Ziaee7

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.

 

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.

 

Keywords 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)

 Sabuj Das1, Haradhan Kumar Mohajan2

1- Senior Lecturer, Department of Mathematics, Raozan University College, Bangladesh.

2- Premier University, Chittagong, Bangladesh.

 

Abstract This paper shows how to prove the two Theorems first and second mock theta conjectures respectively.

Keywords 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)

 

Amin Goli1 , Poyan Ghanbarnejad2, Benyamin Bayat2, Zahra Abaspur2, Zakiye Norozzade2, Mohammad Frotan3, Amirreza Talaiekhozani4,5

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.

 

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.

 

Keywords Formaldehyde, Adsorption, Formalin, Cypress leaf

 

 

 

 

 

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