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    Adsorption of copper on modified wood (pine) materials
    (EDITURA ACADEMIEI ROMANE, 2005) Argun, ME; Dursun, S; Gur, K; Ozdemir, C; Karatas, M; Dogan, S
    The use of natural matter as an adsorbent for copper (11) removal from artificial waste water solution was investigated. To this end, two natural adsorbents, such as pine bark (MPB) modified with HCI and pine cone (MPC) modified with HC1, were studied. At first, the concentration level of the HC1 solution required for modification was observed, being then followed by the determination of the optimum levels of adsorbent, stirring rate, contact time and pH values. Various adsorption isotherms were also obtained by using different concentrations of the heavy metal cations tested in the experiment. As a result, it was found out that the maximum removal efficiency levels obtained were of 98.14%, for the modified pine cone material at pH 5, and of 88.54% for the modified pine barks, respectively, at pH 3.
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    Effect of MnSO4 on the chromium removal from the leather industry wastewater
    (SELPER LTD, PUBLICATIONS DIV, 2005) Ozdemir, C; Karatas, M; Dursun, S; Argun, ME; Dogan, S
    Chromium (VI) is one of the heavy metals in water and wastewater that has the most toxic characteristic. Consequently, it is dangerous for human and environmental health. Various methods are used for removal of the chromium from wastewater, and new methods have been developed in recent years. Recent studies and investigations on the removal of environmental pollution selected methods that were economical, of optimum efficiently and could be carried out easily. In this study, the removal of Cr6+ in the leather industry wastewater is investigated using MnSO4 that was used easily and economically. Experimental studies are performed in two phases. In the first phase, the optimum MnSO4 dose for removal of Cr6- was determined. In the second phase, the optimum pH was studied. About 96% removal of chromium was launched with 530 mg l(-1) MnSO4 dose at pH value 9 in the wastewater sample.
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    Nickel adsorption on the modified pine tree materials
    (SELPER LTD, PUBLICATIONS DIV, 2005) Argun, ME; Dursun, S; Gur, K; Ozdemir, C; Karatas, M; Dogan, S
    Removal of nickel ions from aqueous solutions containing 1-100 mg l(-1), using pine tree (Pinus nigra) materials modified with HCl, was investigated on a laboratory scale. For this purpose, two natural adsorbents such as the modified pine bark (MPB) and the modified pine cone (MPC) materials with HCl solution were studied. At first, the required concentration level of the HCl solution for the modification was observed, and then this was followed by the determinations of optimum levels of adsorbent amount, stirring rate, contact time and pH values. Various adsorption isotherms were also obtained by using different concentrations of the heavy metal cations tested in the experiment. As a result, the maximum removal efficiency levels obtained were as follows; 97% for the modified pine bark at pH 8 and 80% for the modified pine cone at pH 8.
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    Nitrite removal form the water using the wood sawdust
    (EDITURA ACADEMIEI ROMANE, 2004) Dursun, S
    Eutrophication is an important environmental problem originating from high nutrients with mostly domestic waste discharged in wastewaters, decreasing the dissolved oxygen and affecting the aerobic microorganisms in the rivers and lakes around the heavily industrialised regions. During the decomposition of proteins and other nitrogen-containing organic materials by microorganisms (nitrification), the algae populations in water increase and cover the water surface, thus impeding sunlight's penetration to the lower levels of water. Also, some industries and food factories of the developing countries discharge the nitrites directly into water. In this study, the removal of nitrite from artificially polluted water was investigated. Sawdust of poplar (Populous alba L.) and pine (Pinus sylvestris L.) species was used as treatment material. The nitrite solution, with a concentration of 30 mg L-1 in tap water was used as simulated waste sample, the result of this work showing that the maximum amount of nitrite removed was about 96% and 53%, respectively, as depending on the wood types used.
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    Trihalomethane determination and removals from the main discharge channel of Konya City (Turkey)
    (SELPER LTD, PUBLICATIONS DIV, 2004) Ozdemir, C; Dursun, S
    Konya Main Discharge Channel is a very important environmental problem due to carrying the domestic waste water of Konya city centre as well as industrial waste water. Lowest flow rate of the channel was observed in October about 2 10(4) m(3)d(-1). In this period, channel water is not only waste water but includes more rain water coming from Golyazi region. Discharge channel water can only reach to Tuz Lake for three months in a year. At other times of the year, water cannot reach the lake because of high evaporation, infiltration and usage of the water for irrigation. The land irrigated with the waste water tends to lose its productivity. In this study, water samples were collected and analysed from one hourly period for 2 days (24x2=48), daily period for 3 weeks (7x3=21) and monthly samples for a year (9 months). The samples were analysed as to whether these contained trihalomethanes; or not, also results were compared with disinfection method that is used for drinking water, and samples were collected from ten different points on the channel. Pollution level of the channel water was controlled in accordance with the Turkish Water Pollution Control Law. In addition to trihalomethanes analysis, the effect of aeration on trihalomethanes was investigated. Collected samples (given above) were analysed for trihalomethanes compounds, and the relationship between disinfection type and dosage method on trihalomethanes formation was compared in this study.