Ahmet Engin

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Andrej Dujella

University of Zagreb

Hemin Koyi

Uppsala University

Jana Javornik

University of East London

Armando Marques-Guedes

UNL - New University of Lisbon

Graham Martin

University of Leicester

Gwen Robbins Schug

University of North Carolina at Greensboro

Gabriel Gutierrez-Alonso

University of Salamanca

John Sutton

Macquarie University

Eros Carvalho

Universidade Federal do Rio Grande do Sul

Kevin Arbuckle

Swansea University

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Papers by Ahmet Engin

Arpada (Hordeum vulgare L.) Genotip x Çevre İnteraksiyonları ve Stabilite Analizi

Tarım Bilimleri Dergisi, 2004

Biralik Arpalarda Onemli Kalite Ozellikleri ve Bunlarin Malt Kalitesi Uzerine Etkileri

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Biralik Arpalarda Cesit Karisimlari

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bazı arpa çeşitlerinin maraş ve urfa koşullarında

Bu çalışma Kahramanmaraş ve Şanlıurfa koşullarında 1997-98 ve 1998-99 yıllarında iki lokasyonlu o... more Bu çalışma Kahramanmaraş ve Şanlıurfa koşullarında 1997-98 ve 1998-99 yıllarında iki lokasyonlu olarak yürütülmüştür. Denemede 24 iki sıralı 1 altı sıralı olmak üzere toplam 25 arpa çeşidi kullanılmıştır. İki yıllık ortalama sonuçlara göre; Kahramanmaraş koşullarında tane verimi 367.2-734.9 kg/da, bitki boyu 79.50-110.8 cm, başak uzunluğu 7.53-9.44 cm, bin tane ağırlığı 37.14-50.49 g arasında değişmiştir. Şanlıurfa koşullarında ise tane verimi 419.2-540.8 kg/da, bitki boyu 55.98-80.60 cm, başak uzunluğu 5.59-7.24 cm, bin tane ağırlığı 41.62-52.52 g arasında değişmiştir. Şanlıurfa lokasyonunda ortalama 1. Kalite değerleri % 63.38-86.93, 2.kalite değerleri % 8.13-26.9, protein oranı % 10.32-11.95, tane nemi % 9.3-10.1 arasında değişmiştir. K.Maraş koşullarında Brenda, Jubilant, Volga, Brewstar, Viva çeşitleri; Ş.Urfa koşullarında S 448/88, Brenda, Brewstar, Şahin-91, Jubilant, Caruso ve Clarine çeşitleri yüksek verim vermişlerdir. ND.8972, W-1936, Steffi, Kaya, Clarine çeşitleri düşük protein oranı ve yüksek 1. Kalite değerleri vermişlerdir.

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Arpa Cesit ve Hatlarinin Verim ve Malt Ozellikleri Uzerinde Arastirmalar

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Color removal from textile dyebath effluents in a zeolite fixed bed reactor: determination of optimum process conditions using Taguchi method

Journal of hazardous materials, Jan 30, 2008

Feasibility analysis of color removal from textile dyeing wastewater in a fixed-bed column system by surfactant-modified zeolite (SMZ)

Journal of hazardous materials, Jan 30, 2009

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Feasibility analysis of color removal from textile dyeing wastewater in a fixed-bed column system by surfactant-modified zeolite (SMZ)

Journal of Hazardous Materials, 2009

In this study, the ability of surfactant-modified zeolite (SMZ) to remove color from real textile... more In this study, the ability of surfactant-modified zeolite (SMZ) to remove color from real textile wastewater was investigated. Tests were performed in a fixed-bed column reactor and the surface of natural zeolite was modified with a quaternary amine surfactant hexadecyltrimethylammonium bromide (HTAB). The zeolite bed that was modified at 1 g L −1 HTAB concentration and HTAB flow rate of 0.015 L min −1 showed good performance in removing color. Effects of wastewater color intensity, flow rates and bed heights were also studied. Wastewater was diluted several times in the ratios of 25%, 50% and 75% in order to assess the influence of wastewater strength. The breakthrough curves of the original and diluted wastewaters are dispersed due to the fact that breakthrough came late at lower color intensities and saturation of the bed appeared faster at higher color intensities. The column had a 3-cm diameter and four different bed heights of 12.5, 25, 37.5 and 50 cm, which treated 5.25, 19.50, 35.25 and 51 L original textile wastewater, respectively, at the breakthrough time at a flow rate of 0.025 L min −1 . The theoretical service times evaluated from bed depth service time (BDST) approach for different column variables. The calculated and theoretical values of the exchange zone height were found with a difference of 27%. The various design parameters obtained from fixed-bed experimental studies showed good correlation with corresponding theoretical values, under different bed heights. The regeneration of the SMZ was also evaluated using a solution consisting of 30 g L −1 NaCl and 1.5 g L −1 NaOH at pH 12 and temperature 30 • C. Twice-regenerated SMZ showed the best performance compared with the others while first-and thrice-regenerated perform lower than the original SMZ.

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Color removal from textile dyebath effluents in a zeolite fixed bed reactor: Determination of optimum process conditions using Taguchi method

Journal of Hazardous Materials, 2008

Taguchi method was applied as an experimental design to determine optimum conditions for color re... more Taguchi method was applied as an experimental design to determine optimum conditions for color removal from textile dyebath house effluents in a zeolite fixed bed reactor. After the parameters were determined to treat real textile wastewater, adsorption experiments were carried out. The breakthrough curves for adsorption studies were constructed under different conditions by plotting the normalized effluent color intensity (C/C(0)) versus time (min) or bed volumes (BV). The chosen experimental parameters and their ranges are: HTAB concentration (C(htab)), 1-7.5 gL(-1); HTAB feeding flowrate (Q(htab)), 0.015-0.075 L min(-1); textile wastewater flowrate (Q(dye)), 0.025-0.050 L min(-1) and zeolite bed height (H(bed)), 25-50 cm, respectively. Mixed orthogonal array L(16) (4(2)x2(2)) for experimental plan and the larger the better response category were selected to determine the optimum conditions. The optimum conditions were found to be as follows: HTAB concentration (C(htab))=1g L(-1), HTAB feeding flowrate (Q(htab))=0.015 L min(-1), textile wastewater flowrate (Q(dye))=0.025 L min(-1) and bed height (H(bed))=50 cm. Under these conditions, the treated wastewater volume reached a maximum while the bed volumes (BV) were about 217. While HTAB concentration, gL(-1) (A); zeolite bed height, cm (D) and wastewater flowrate, L min(-1) (C) were found to be significant parameters, respectively, whereas, HTAB flowrate, L min(-1) (B) was found to be an insignificant parameter.