Browsing by Author "Turkmenler, Harun"
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Article Citation Count: 14Biosorption Kinetics and Isotherm Studies of Cd(II) by Dried Enteromorpha compressa Macroalgae Cells from Aqueous Solutions(Wiley, 2010) Sahmurova, Aida; Turkmenler, Harun; Ozbas, Emine ElmaslarFor the first time ever Enteromorpha compressa macroalgae (ECM) which is commonly found in Turkey has been used as biosorbent by us This study aims to investigate the biosorption of Cd2+ from aqueous solutions in a batch system by using an alga of ECM in different concentrations pH levels agitation rates (90-150 rpm) and contact periods The maximum biosorption capacity of the ECM was found to be 9 50 mg/g at pH 6 Cd2+ initial concentration of 10 mg/L and agitation rate 150 rpm Cadmium removal efficiency was about 95% The experimental isotherm data were analyzed using the Langmuir and Freundlich equations Isotherm parameters for both equations were determined and discussed The stated biosorption mechanism is explained by the Freundlich isotherm (r(2) = 0 998) theory Two simplified kinetic models including a pseudo-first and second order equation were selected to follow the biosorption process Kinetic parameters rate constants equilibrium adsorption capacities and related correlation coefficients for each kinetic model were calculated and discussed It was shown that the biosorption of cadmium onto ECM could be described by the pseudo-second order equation (r(2) > 0 99)Article Citation Count: 2HEAVY METAL REMOVAL BY USING DRIED ENTEROMORPHA COMPRESSA MACRO ALGAE FROM AQUEOUS SOLUTION AND INDUSTRIAL WASTEWATER APPLICATION(Parlar Scientific Publications (p S P), 2013) Sahmurova, Aida; Turkmenler, Harun; Gulnaz, OsmanIn this study adsorption of Zn (II) ions from aqueous solution was studied using Enteromorpha Compressa (EC) as an adsorbent. The FT-IR analysis results shows that EC biomass have several metal binding functional groups such as carboxyl and hydroxyl groups. The zero point of charge of the biomass was determined as pH 5.56 +/- 0.2. The optimum adsorption pH was determined at pH 6 and maximum adsorption capacity (Q(max)) of EC was determined as 625 mgg(-1). Adsorption capacity of biomass was increased with increase of the initial metal concentrations, however increasing the particle size range of biomass decreased the Zn (II) adsorption capacity. The pseudo second-order model well described the adsorption of Zn (II) on EC. The general using and efficiency of EC to treatment of industrial wastewater was tested. EC biomass effectively removed metal ions from industrial wastewater. contain 0.186 mgL(-1) of Cd, 0.034 mgL(-1) of Cu, 0.16 mgL(-1) of Zn ions. The the Chemical Oxygen Demand (COD) of industrial wastewater reduced after adsorption experiment from 886 to 729 mgL(-1) for sample 1 at pH 6.