B.Sc

Sep 1, 1977 - Jul 1, 1981

Chemical Engineering

MSc

Feb 10, 1984 - Feb 10, 1986

Chemical Engineering

PhD

Oct 1, 1992 - Dec 2, 1996

Chemical Engineering

Adsorption of phenol from aqueous solution using granular activated carbon from walnut shell

Dec 4, 2023

Journal AIP Conf. Proc. 2834

publisher AIP Publishing

DOI https://doi.org/10.1063/5.0161507

Issue 1

Volume 2834

Walnut shell (WS) was examined to prepare granular activated carbon (WSGAC). The characterizations of (WSGAC) were studied using X-ray diffraction and Fourier transform infrared (FTIR). Results suggested that WSGAC possessed a porous structure that is rich in carboxyl and hydroxyl groups on its surface that play a significant role in phenol adsorption. The specific surface area of WSGAC was estimated by methylene blue (MB) adsorption, which is equal to 2313.01 m2/g, iodine number 659.906 (mg/g), and (MB) number 728.5 (mg/g). These numbers revealed that it was highly meso and macro-porous. Various adsorption parameters (dosage of WSGAC, contact time, pH and temperature) were tested. The pH of the solution was shown to have a significant impact on adsorption. At pH 3, the most adsorption occurred. Equilibrium isotherms were analyzed using Freundlich, Langmuir and Temkin models. The data best fitted with the Langmuir isotherm with an adsorption capacity of 2508.86 mg/g and R2=0.9884. Results obtained show that the removal percentage increases as the temperature increases from (81.63%) at 288k to (94.47%) at 343k. The kinetics of phenol adsorption followed a pseudo-second-order kinetic model. Thermodynamic parameters (∆Go), (∆H) and (∆So) indicated that phenol adsorption was spontaneous and endothermic.

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Active Carbon from Microwave Date Stones for Toxic Dye Removal: Setting the Design Capacity

Jun 18, 2020

Journal Chemical Engineering & Technology

publisher WILEY-VCH Verlag GmbH

DOI DOI: 10.1002/ceat.202000059

Issue 9

Volume 43

The widely used toxic dye malachite green (MG) poses a significant risk to human health, having a mutagenic effect. Waste date stones were used to produce microwave-activated carbons and were applied to adsorb the highly toxic dye. The critically important task of selecting the correct design adsorption capacity for different effluent pollutant concentrations to meet effluent discharge limit standards is described and a novel design selection criteria approach is presented.

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Combined magnetic field and adsorption process for treatment of biologically treated palm oil mill effluent (POME)

May 1, 2014

Journal Chemical Engineering Journal

publisher Elsevier

DOI http://dx.doi.org/10.1016/j.cej.2013.12.084

Volume 243

The production of palm oil, however, results in the generation of large quantities of polluted wastewater commonly referred as palm oil mill effluent (POME). There is an actual need to seek factors intensifying the treatment processes of POME. The new methods which not required extension of existing plants or building very expensive bioreactors are still searching. In recent years increasing attention has been directed to the possibility of improvement of waste water treatment by static magnetic field. The aim of our study was to determine the impact of constant magnetic field as well as the integration of this technique with the famous technique used for wastewater treatment which is adsorption by activated carbon as a novel method for POME treatment. This new method has been found to be a useful method for removing colour, TSS and COD from biologically treated POME.

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Treatment and decolorization of biologically treated Palm Oil Mill Effluent (POME) using banana peel as novel biosorbent

Dec 8, 2013

Journal Journal of Environmental Management

publisher Elsevier

DOI http://dx.doi.org/10.1016/j.jenvman.2013.11.031

Volume 132

Palm Oil Mill Effluent (POME) treatment has always been a topic of research in Malaysia. This effluent that is extremely rich in organic content needs to be properly treated to minimize environmental hazards before it is released into watercourses. The main aim of this work is to evaluate the potential of applying natural, chemically and thermally modified banana peel as sorbent for the treatment of biologically treated POME. Characteristics of these sorbents were analyzed with BET surface area and SEM. Batch adsorption studies were carried out to remove color, total suspended solids (TSS), chemical oxygen demand (COD), tannin and lignin, and biological oxygen demand (BOD) onto natural banana peel (NBP), methylated banana peel (MBP), and banana peel activated carbon (BPAC) respectively. The variables of pH, adsorbent dosage, and contact time were investigated in this study. Maximum percentage removal of color, TSS, COD, BOD, and tannin and lignin (95.96%, 100%, 100%, 97.41%, and 76.74% respectively) on BPAC were obtained at optimized pH of 2, contact time of 30 h and adsorbent dosage of 30 g/100 ml. The isotherm data were well described by the Redliche Peterson isotherm model with correlation coefficient of more than 0.99. Kinetic of adsorption was examined by Langergren pseudo first order, pseudo second order, and second order. The pseudo second order was identified to be the governing mechanism with high correlation coefficient of more than 0.99.

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Waste lubricating oil treatment by extraction and adsorption

Mar 15, 2013

Journal Chemical Engineering Journal

publisher Elsevier

DOI http://dx.doi.org/10.1016/j.cej.2012.12.076

Volume 220

In this work, the recovery of base oils from waste lubricants was investigated using a novel combination of solvent extraction and adsorption on solids. The performance of six extracting solvents (n-hexane, 1- butanol, petroleum ether, 1-hexanol, carbon tetra chloride, and acetone) was evaluated experimentally. Solvent to oil ratios from 1:1 to 4:1 were also examined. This research has studied the effect of the use of KOH to enhance flocculation. The results show that 1-butanol achieved the best performance with the maximum percent sludge removal, followed by n-hexane, petroleum ether, 1-hexanol, carbon tetrachloride, and acetone. The percentage of oil sludge was found to increase with the increase of solvent to oil ratio until it reached the maximum at the ratio of 3:1. The application of an adsorption process using different adsorbent materials was investigated. Adsorbent materials such as almond shell, walnut shell, eggshell, and acid activated clay which were prepared locally were used. It was found that the acid activated clay was able to give the best conditions for treating the waste oil followed by the almond shell powder. The results from the test showed that, viscosity increased from 38.3 cst for used lube oil to 85 cst for acid/ clay treatment and the flash point increase from 178 C to 238 C, while the density decreased from 912 to 896 kg/m3, the pour point from 6 to 13.2 C and colour from 0.53 to 0.12. Other results from the different tests showed varying degrees of improvement with the best results obtained using the acid/clay treatment.

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Removal of Heavy Metals from Waste Water Using Black Tea-waste

Apr 17, 2012

Journal Arabian Journal for Science and Engineering

publisher Springer

DOI DOI 10.1007/s13369-012-0264-8

Issue 6

Volume 37

Removal of heavy metals (Cobalt, Cadmium, and Zinc) from waste water was possible using black teawaste. Adsorption was observed for the three metals at 180 min. Under our experimental conditions, pH plays an important role in the adsorption process, particularly on the adsorption capacity of teawaste for the heavy metals under study. The pH level allowing for an optimum rate of adsorption was found to be 6 for Co, Cd, and Zn. We demonstrate that black teawaste has a relatively high adsorption capacity for these heavy metals; the quantities adsorbed per a half gram of black teawaste at equilibrium (qe) are 15.39 mg/g for Co, 13.77 mg/g for Cd, and 12.24 mg/g for Zn. It was found that the percentage of removed metal ions is inversely proportional to initial metal ions concentration, but correlates with teawaste adsorbent dosage. The adsorption of heavy metals on black teawaste is described by an isotherm of type I and is fully verified by the Freundlich and Langmuir isotherms. The kinetics of the Cobalt, Cadmium, and Zinc adsorption on the teawaste were found to follow a pseudo first-order rate equation. This method has the advantage of being applicable in developing countries due to the low cost and availability of teawaste.

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