Mokhtar Arami - Academia.edu (original) (raw)

Papers by Mokhtar Arami

Black Sea Oceanography, 1991

... M. Rajasimman a , Corresponding Author Contact Information , E-mail The Corresponding Author ... more ... M. Rajasimman a , Corresponding Author Contact Information , E-mail The Corresponding Author and P. Karthic b. a Department of Chemical Engineering, Annamalai University, Annamalai Nagar-608002, Tamil Nadu, India. ...

Chemical Engineering and Processing: Process Intensification, 2013

ABSTRACT The optimization and modeling of the electrocoagulation process which conducted by means... more ABSTRACT The optimization and modeling of the electrocoagulation process which conducted by means of iron (EC-Fe) and aluminum (EC-Al) anodes, in the removal of C.I. Reactive Red 43 were performed through the response surface methodology (RSM). Moreover, the occurrence of possible destructive reactions during both EC-Fe and EC-Al processes was investigated using UV–Vis spectrometry, total organic carbon (TOC) and GC–MS analyses. The electrocoagulation experiments were carried out in a monopolar batch reactor using two anodes and two cathodes in parallel connections. Current density, time, pH and chloride concentration were considered as input variables for RSM. The analysis of variance revealed a high coefficient of determination (REC-Fe2=0.981 and REC-Al2=0.934) between experimental removal efficiency and predicted one by RSM developed models. The optimum conditions proposed by RSM to reach the maximum RR43 removal through the EC-Fe were different from the ones proposed for the EC-Al. At the optimum conditions, the removal efficiency of dye was more than 99% for both processes, whereas 90.58% and 98.37% of initial TOC concentration decreased during EC-Fe and EC-Al processes, respectively. The analyses results confirmed that beside sweep flocculation mechanism, known as the main removal mechanism, the degradation of dye was occurred during EC-Fe as a minor pathway.

Environmental Engineering and Management Journal, 2012

$Research paper thumbnail of Tailoring the hierarchical porous structure within polyethersulfone/cellulose nanosheets mixed matrix membrane to achieve efficient dye/salt mixture fractionation$

Journal of Polymer Research, 2016

Water Practice and Technology, 2011

The aim of this study is to examine the effect of operational parameters on fluoride removal usin... more The aim of this study is to examine the effect of operational parameters on fluoride removal using electrocoagulation method. For this purpose, various operational parameters including initial pH, initial fluoride concentration, applied current, reaction time, electrode connection mode, anode material, electrolyte salt, electrolyte concentration, number of electrodes and interelectrode distance were investigated. The highest defluoridation efficiency achieved at initial pH 6. In the case of initial fluoride concentration, maximum removal efficiency (98.5%) obtained at concentration of 25mg/l. The increase of applied current and reaction time improved defluoridation efficiency up to 99%. The difference of fluoride removal efficiencies between monopolar and bipolar series and monopolar parallel were significant, especially at reaction time of 5 min. When aluminum used as anode material, higher removal efficiency (98.5%) achieved compared to that of iron anode (67.7%). The best electro...

J. Color Sci. …, 2009

Page 1. *Corresponding author: arami@aut.ac.ir available online @ www.jcst.icrc.ac.ir @ /2) 1387 ... more Page 1. *Corresponding author: arami@aut.ac.ir available online @ www.jcst.icrc.ac.ir @ /2) 1387 (< 247 237 > @ @ > @ pH > 1< 2* < @ 3 @> < 4 1 < < < > < 4413 - 15784 2 < < < > < 4413 - 15784 3 < > > < < 51167 - 87317 4 < < < < < 654 - 16765 ...

JOURNAL OF COLOR SCIENCE …, 2008

This study aims to investigate the performance of polyaluminum chloride (PAC) as a coagulant to r... more This study aims to investigate the performance of polyaluminum chloride (PAC) as a coagulant to remove Acid blue 292 (AB292), which is used widely in textile industry in Iran. The effect of pH, coagulant dosage, kaolinite (as a natural coagulant aid), and initial dye ...

Water Science and Technology, 2011

Chitosan was selected as a natural coagulating agent for the removal of acid dyes (Acid Blue 292;... more Chitosan was selected as a natural coagulating agent for the removal of acid dyes (Acid Blue 292; AB292, and Acid Red 398; AR398) from dye-containing solutions. The study was organised in two phases. In phase 1, chitosan was used alone as a natural coagulant for the removal of the dyes. For this purpose, the effect of different parameters including pH, chitosan dosage and initial dye concentration on the dye removal efficiency was examined. In phase 2 of the study, the application of chitosan as a natural coagulant aid in conjunction with polyaluminium chloride (PAC) was assessed. According to the results of phase 1, the best removal efficiencies occurred in an acidic pH range (less than 6) for both of the dyes. Also, excellent dye removal results (about 90%) were achieved with relatively low dosages of chitosan (30–35 mg L−1 for AB292 and 50–60 mg L−1 for AR398). However, the initial concentration of the dyes severely influenced the coagulation performance of chitosan, which can co...

Water Science and Technology, 2010

This study aims to compare the performance of two waterworks sludge samples, ferric chloride slud... more This study aims to compare the performance of two waterworks sludge samples, ferric chloride sludge (FCS) and polyaluminium chloride sludge (PACS), as coagulants to remove Acid Red 119 (AR119) dye from aqueous solution. A series of batch experiments were performed to investigate the effect of initial pH, coagulant dosage and initial dye concentration on coagulation/flocculation process efficiency. Results showed that the dye removal was strongly pH-dependent and followed the same trend for both coagulants, increasing steadily with decreasing initial pH in the range of 3–12. With the increase of coagulant dosage, the dye removal efficiency increased and no re-stabilization phenomenon was observed. However, the coagulant dosage needed for the maximum dye removal efficiency was much lower for FCS (150 mg dried sludge/L) in compare with PACS (5.5 g dried sludge/L). It seems that both charge neutralization and sweep flocculation mechanisms were involved in removal of AR119 using FCS and ...

Environmental Engineering and Management Journal