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Browsing MÜHENDİSLİK FAKÜLTESİ by Author "Altundoğan, Hamdi Soner"


Browsing MÜHENDİSLİK FAKÜLTESİ by Author "Altundoğan, Hamdi Soner"

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  • A study on the Cr(VI) removal from aqueous solutions by steel wool 
    Özer, Ahmet; Altundoğan, Hamdi Soner; Erdem, Mehmet; Tümen, Fikret (1997)
    The reduction of Cr(VI) by steel wool and the precipitation of reduced chromium by CaCO(3) powder and NaOH solution were investigated in continuous and batch systems, respectively. The effects of acid and initial Cr(VI) ...
  • A study on the reduction of hexavalent chromium in aqueous solutions by vinasse 
    Altundoğan, Hamdi Soner; Özer, Ahmet; Tümen, Fikret (2004)
    Hexavalent chromium introduced to the water ecosystem is an important issue due to the toxic effect it poses. The first step of conventional treatment of wastewaters containing hexavalent chromium is its reduction to ...
  • A study on the sulphuric acid leaching of copper converter slag in the presence of dichromate 
    Altundoğan, Hamdi Soner; Boyrazlı, Mustafa; Tümen, Fikret (2004)
    In this study, extraction characteristics of Cu, Co, Zn and Fe from copper converter slag by oxidative leaching with potassium dichromate–sulphuric acid lixiviant were investigated. The experimental results indicated that ...
  • Arsenic adsorption from aqueous solutions by activated red mud 
    Altundoğan, Hamdi Soner; Altundoğan, Sema; Tümen, Fikret; Bildik, Memnune (2002)
    Heat treatment and acid treatment methods have been tested on red mud to increase its arsenic adsorption capability. The results indicate that the adsorptive capacity of red mud can be increased by acid treatment. This ...
  • Arsenic removal from aqueous solutions by adsorption on red mud 
    Altundoğan, Hamdi Soner; Altundoğan, Sema; Tümen, Fikret; Bildik, Memnune (2000)
    Use of red mud, which is a waste product from bauxite processing, has been explored as an alternate adsorbent for arsenic in this study. The tests showed that the alkaline aqueous medium (pH 9.5) favored the removal of ...
  • As(V) removal from aqueous solutions by coagulation with liquid phase of red mud 
    Altundoğan, Hamdi Soner; Tümen, Fikret (2003)
    As(V) removal by using liquid phase of red mud (LPRM) is reported in this article. The experimental section includes characterization of LPRM, as well as As(V) removal from arsenical aqueous solution mixed with LPRM by ...
  • Copper removal from aqueous solutions by sugar beet pulp treated by NaOH and citric acid 
    Altundoğan, Hamdi Soner (2007)
    Sugar beet pulp was converted into effective copper sorption material by treating subsequently with NaOH and citric acid. Compared with the untreated sugar beet pulp, the cation exchange capacity of the modified sugar beet ...
  • Cr(VI) reduction in aqueous solutions by using copper smelter slag 
    Kıyak, Belgin; Özer, Ahmet; Altundoğan, Hamdi Soner; Erdem, Mehmet; Tümen, Fikret (1999)
    The ability of Copper Smelter Slag (CSS) to reduce Cr(VI) in aqueous solutions has been investigated. The extent of reduction is dependent on the amounts of acid and reductant, contact time, Cr(VI) concentration, temperature ...
  • Cr(VI) Reduction in aqueous solutions by using synthetic iron sulphide 
    Erdem, Mehmet; Altundoğan, Hamdi Soner; Özer, Ahmet; Tümen, Fikret (2001)
    This study was carried out to reduce Cr(VI) in aqueous solutions by using synthetic iron sulphide. For that purpose, the effects of acid content, contact time, initial Cr(VI) concentration, temperature of the solution, ...
  • Hardness removal from waters by using citric acid modified pine cone 
    Altundoğan, Hamdi Soner; Topdemir, Aykut; Çakmak, Meltem; Bahar, Nurdan (2016)
    In this study, an effective cation exchanger was developed from pine cone by citric acid modification and its hardness removal properties from waters were investigated. For this purpose, grinded pine cone samples were ...
  • Heavy metals binding properties of esterified lemon 
    Arslanoğlu, Hasan; Altundoğan, Hamdi Soner; Tümen, Fikret (2009)
    Sorption of Cd2+, Cr3+, Cu2+, Ni2+, Pb2+ and Zn2+ onto a carboxyl groups-rich material prepared from lemon was investigated in batch systems. The results revealed that the sorption is highly pH dependent. Sorption kinetic ...
  • Hexavalent chromium removal by ferrochromium slag 
    Erdem, Mehmet; Altundoğan, Hamdi Soner; Turan, Mehmet Deniz; Tümen, Fikret (2005)
    The aim of this study is to demonstrate the potential of Cr(VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr(VI) concentrations of water contacted with ferrochromium slag (W/FS = ...
  • Metal recovery from copper converter slag by roasting with ferric sulphate 
    Altundoğan, Hamdi Soner; Tümen, Fikret (1997)
    A study of the recovery of copper, cobalt, nickel and zinc from copper converter slag by roasting with ferric sulphate is reported. Roasting of converter slag with ferric sulphate, followed by leaching with water, was ...
  • Preparation of cation exchanger from lemon and sorption of divalent heavy metals 
    Arslanoğlu, Hasan; Altundoğan, Hamdi Soner; Tümen, Fikret (2008)
    A cation exchanging material was developed from lemon by modifying the pectic–cellulosic substances in the lemon peel by lemon juice having citric acid. For this purpose, chopped lemon removed from seeds and yellow skin ...
  • Recovery of metals from copper converter slag by leaching with K2Cr2O7-H2SO4 
    Boyrazlı, Mustafa; Altundoğan, Hamdi Soner; Tümen, Fikret (2006)
    In this study, the effects of some parameters on the extraction of metals from copper converter slag by using a sulphuric acid/potassium dichromate lixiviant were investigated. The leaching kinetic of copper from converter ...
  • Recovery of zinc and lead from zinc plant residue 
    Turan, Mehmet Deniz; Altundoğan, Hamdi Soner; Tümen, Fikret (2004)
    Zinc and lead recovery from zinc plant residue (ZPR) has been investigated. The residue is discarded as a cake from a Waelz kiln processing zinc–lead carbonate ores. The zinc plant residue containing 11.3% Zn, 24.6% Pb, ...
  • Removal of hexavalent chromium by using heat-activated bauxite 
    Erdem, Mehmet; Altundoğan, Hamdi Soner; Tümen, Fikret (2004)
    In this study, to increase the Cr(VI) adsorption capacity of bauxite, heat treatment method was tested and the effects of pH, adsorbent dosage, contact time, initial Cr(VI) concentration and temperature on the adsorption ...
  • Removal of phosphates from aqueous solutions by using bauxite: I. effect of pH on the adsorption of various phosphates 
    Altundoğan, Hamdi Soner; Tümen, Fikret (2002)
    In this study, the effect of pH on adsorption of various forms of phosphate onto bauxite was investigated. For this purpose, the adsorption and desorption of inorganic (ortho and condensed) and organic phosphate species ...
  • Removal of phosphates from aqueous solutions by using bauxite: II.activation study 
    Altundoğan, Hamdi Soner; Tümen, Fikret (2003)
    In this study, acid treatment and heat treatment methods have been investigated in order to enhance the phosphate adsorption capacity of bauxite. For this purpose, a series of bauxites treated with 0.1–1.0 M HCl and another ...
  • The removal of Cr(VI) from aqueous solutions using zinc extraction residue 
    Günaydın, Fatma; Özer, Ahmet; Altundoğan, Hamdi Soner; Erdem, Mehmet; Tümen, Fikret (1999)
    This study deals with the removal of Cr(VI) from aqueous solutions by using filter cake known as zinc extraction residue (ZER) generated as a by product in a zinc production plant located in Kayseri-TURKEY. It was found ...

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