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Volume (issue) 4(1), December 1999

CONTENTS

Correlation of solid-liquid mass transfer in liquid fluidized bed (1999) Volume (issue) 4 (1) : 1-12

O. Laçin and H. Saraç

Atatürk University, Department of Chemical Engineering, Erzurum,Türkiye

Correlation of solid-liquid mass transfer between fluid and immersed object in liquid fluidized bed of spherical inert particles has been studied experimentally using a rectangular fluidization column. The mass transfer coefficients were obtained by measuring the limiting current for the diffusion-controlled reduction of ferri- and ferro-cyanide at a flat nickel electrode as function of electrode height. Experimental data are correlated as follow;

Experimental data agree reasonably well with the proposed model. The correlation is discussed in light of the results of this study and the literature.


Pollution potential of Murgul copper plant solid wastes (1999) Volume(issue) 4(1): 13-20

A. Yartaşı1, A. Ekmekyapar2, R. Gül3, and A. Sert1

1Atatürk University, Engineering Faculty, Department of Chemical Engineering, Erzurum, Turkey

2Inönü University, Engineering Faculty, Department of Chemical Engineering, Malatya, Turkey

3Atatürk University, Engineering Faculty, Department of Civill Engineering, Erzurum, Turkey

In this study, the heavy metal pollution from Murgul Copper Plant solid waste to environment was investigated. For its purpose, the amounts of Fe, Zn, Mg, Co, Al, Cd, Cu, Cr and Pb from the waste into water were determined, changing the ratio of solid waste / water by column tests under laboratory conditions, and the adsorption capabilities of the metals in the water on the region soil were examined carefully. In addition the amounts of the heavy metal leakage from the solid waste to the environment by the effect of rain and snow water were observed by an experimental set up during one year period.

In the column experiments and experiments carried out in open air conditions, it was observed that considerable amounts of the heavy metal ions from the solid waste leaked to the environment. It was determined that the metal amounts leaking into water by long period contact of the solid waste with water increased or decreased depending upon the heavy metal species. It was also found that in open air conditions the same amount of the solid waste gave more heavy metal to the environment than in laboratory conditions, which can be attributed to the effect of changing weather conditions. the region soil adsorbed these metal leaking into water in different levels depending on the species of the metal.


Levels of heavy metals in the alga of Ulva lactuca growing in the Aegean Sea (1999) Volume(issue) 4(1): 21-23

M. Tüzen1, E. Sesli2, and A. Demirbaş2

1Gaziosmanpaşa University, Department of Chemistry, Tokat, Turkey

2Karadeniz Technical University, Department of Science Education, 61335-Akçaabat, Trabzon, Turkey

Levels of seven heavy metals (Mn, Fe, Ni, Cu, Zn, Pb, and Cd) were determined by flame AAS in the species of Ulva lactuca collected from sites around the province of İzmir in Aegean Sea (Turkey). Generally the order of metal abundance in Ulva lactuca was Fe> Mn> Zn> Cu, Ni, Pb> Cd.


A study for learning the orders of atomic orbitals (1999) Volume (issue) 4 (1) : 25-29

A. Menzek

Department of Chemistry, Faculty of Arts and Sciences, Atatürk University, 25240 Erzurum, Turkey

This paper will contribute that the orders of atomic orbitals is easily learned in chemistry education. , In education use of words and phrases, remembered and related to each other, is important. Therefore, phrase saafedpe which have vowel and consonant letter was taken into consideration. These vowel and consonant letters were used for determination of orders and principle quantum numbers of atomic orbitals (AO).


Some taxa of Bryophyta spreaded in Eynesil District (Giresun-Turkey) (1999) Volume (issue) 4 (1) : 30-41

T. Özdemir

Karadeniz Technical University, Department of Biology Education,TR-61335, Akçaabat,Trabzon, Turkey

This study contained 78 taxa collected and identified in Eynesil district of Giresun province in Turkey by the botanical excursion made various times in August-September-October 1999. 63 taxa of them belong to the Bryopsida (Musci) and 15 taxa belong to Marchantiopsida (Hepaticopsida). 6 taxa of these are new records for the A4 square. All of taxa are new records for the study area.


Chromite minerals from Guleman in Turkey and their XRF and classic analyses (1998) Volume(issue) 4(1): 42-46

M. Özdemir1, A. Demirbaş1, and İ. Çakmak2

1Educational Faculty, Karadeniz Technical University, 61335, Akçaabat, Trabzon, Turkey

2Department of Chemistry, Fırat University, Elazığ, Turkey

Samples of chromite ore supplied from different six sources in Turkey were analyzed by X-ray fluorometric method. Five of these samples were excellent convenient for the metallurgical uses. The other one was suitable the refractory use, and all of them are sufficient the chemical uses. One of these in order to have the ratio of MgO/SiO2 lower than 1.06 is not available for ferrochrom production.


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