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- MakaleYalnız künye2018Scopus SJRQ3Assessment and ICP-MS determination of toxic metal content (Cd, Cr, Ni, and Pb) in Ibrkish chicken meat for use as bioindicator for human health
Karaaslan, Nagihan M.; Yaman, Mehmet
The aim of this study was to determine the toxic metal concentrations in chicken meat consumed by the Turkish population and to establish health risk assessment. The concentrations of cadmium (Cd), chromium (Cr), nickel (Ni), and lead (Pb) in chicken meat produced by seven different suppliers were determined using inductively coupled plasma mass spectrometry (ICP- MS). The Cd concentrations in all samples were found to be lower than the maximum allowable concentration (MAC) of 50 Hg kg-1. The Cr and Ni concentrations in all samples were lower than 700 and 450 μg kg-1, respectively, with the exception of Cr in the samples from one producer and of Ni from two other producers. The Pb concentrations (max. 413 μg kg-1) in the samples from three producers were found to be higher than the MAC of 100 μg kg-1. Although the concentrations of lead in some samples exceed the limits set by the authorities, risk of developing cancer over a human lifetime was found to be not significant (between 3 to 16 per 1,000,000 persons).
AtıfScopus8
İncele - MakaleYalnız künye2018Scopus SJRQ3Response surface modeling for Pb(II) removal from alcoholic beverages using natural clay: Process optimization with box–behnken experimental design and determination by electrothermal AAS
Ince, Olcay Kaplan; Ince, Muharrem; Onal, Ali
A three-level four-factor Box–Behnken experimental design (BBD) combined with response surface modeling (RSM) was used for the optimization and modeling of Pb(II) adsorption from alcoholic beverages onto natural clay. The BBD method was chosen as the statistical prediction method to reduce the experimental numbers which saves time and chemicals and reduce analysis cost. Various independent process variables including solution pH (X1: 3.0– 7.0), contact time (X2: 2–60 min), adsorbent dosage (X3: 0.01-0.1 g), and agitation speed (X4: 50–150 rpm) were optimized. The optimal conditions used for Pb(II) removal were pH of 5.3, contact time 38.9 minutes, 0.071 g adsorbent dosage, and 98.7 rpm agitation speed, resulting in a maximum removal efficiency of 120 mg g-1. Pb was determined by electrothermal AAS. The significance of the independent variables and their interactions were tested by means of the analysis of variance (ANOVA) and are based on the ANOVA statistical value. The adsorption of Pb(II) onto clay was found to be highly significant with very low probability (p) values (<0.001). These results were justified by the relatively high correlation coefficients (R2 = 0.9965, R2 adj = 0.9930, and R2 Pred= 0.9819) of the statistical prediction. FTIR analysis confirmed major participation of amide, amines, ketones, including the primary alcohol groups, during Pb(II) biosorption. Clay was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM), coupled with energy dispersive X-Ray (EDX). The proposed adsorption process efficiently removes Pb(II) present in various aqueous media and can be used for industrial wastewater or drinks.
AtıfScopus6İncele - MakaleYalnız künye2017Scopus SJRQ3Box-Behnken design approach for optimizing removal of copper from wastewater using a novel and green adsorbent
Ince, Muharrem; Ince, Olcay Kaplan
The aim of the present research was to apply the Box-Behnken experimental design and response surface methodology for modeling of copper (Cu2+) ions from an industrial wastewater and leachate pretreated astragalus herbal plant. A three factor, three level Box-Behnken experimental design combined with response surface modeling (RSM) and quadratic programming (QP) was employed for maximizing Cu(ID removal from aqueous solution based on 17 different experimental data obtained in a batch experimental study. Three independent variables (pH ranging from 2.0 to 8.0, contact time from 10 to 180 minutes, and adsorbent amount from 0.1 to 1 g) were studied. The significance of the independent variables and their interactions were tested by means of the analysis of variance (ANOVA) with 95% confidence limits. The standardized effects of the independent variables and their interactions on the dependent variable were also investigated by preparing a Pareto chart. The optimum values of the selected variables were obtained by solving the quadratic regression model as well as by analyzing the response surface contour plots. Using the experimental conditions of pH = 5.0, contact time = 92.5 minutes, adsorbent dosage = 0.25 g, the recovery efficiency of Cu(II) was found to be 100%. Copper-free and copperloaded astragalus was analyzed using fourier transform infrared spectrometry (FTIR) which evidenced the functional groups involved in copper uptake. Adsorption equilibrium for copper was described by using the Freundlich and Langmiur adsorption isotherms. This adsorbent was applied to different industrial wastewater and leachate samples for copper removal.
AtıfScopus17İncele - MakaleYalnız künye2017Scopus SJRQ3Determination of element concentrations in commercial infant formulas using atomic absorption spectrometry
Unuvar, Songul; Savan, Ebru Kuyumcu; Karaaslan, Nagihan M.
The presence of heavy metals, inadequate minerals and elements in infant foods is of great concern. In this study, the heavy metals aluminum (Al) and lead (Pb), essential elements such as iron (Fe) and zinc (Zn), and minerals such as calcium (Ca), potassium (K), magnesium (Mg), and sodium (Na) were determined by atomic absorption spectrometry (AAS) in five different brands of 20 infant formula samples obtained from pharmacies and supermarkets in Malatya, Turkey. The Joint FAO/ WHO Expert Committee on Food Additives (JECFA) has set the maximum concentration levels of heavy metals in infant formula and levels of provisional tolerable weekly intake (PTWI) of these metals by infants. The levels of Al and Pb in the analyzed samples were found to be under legal limits. The recommended daily intake (RDI) of the essential elements and minerals were found within normal and permissible ranges, showing that the formulas are safe for infants.
AtıfScopus1İncele - MakaleYalnız künye2017Scopus SJRQ3Using food waste biomass as effective adsorbents in water and wastewater treatment for Cu(II) removal
Ince, Muharrem; Ince, Olcay Kaplan; Asam, Eren; Önal, Ali
The present study investigated Cu(II) ion adsorption onto banana peel, chestnut shell, and tea leaf waste in aqueous medium under different experimental conditions. Batch adsorption studies were carried out with various Cu(II) concentrations as well as the influence of process parameters such as pH, contact time, and adsorbent amount on the removal of copper, and the optimum conditions for maximum removal of copper from an aqueous solution. These food waste biomass adsorbents were applied to mineral water and industrial wastewater samples and the copper removal potentials were compared. The nature of the adsorbents and metal ion interactions was examined by the fourier transform infrared spectroscopy (FTIR) technique. The adsorption data were obtained by using the Langmuir model showing maximum adsorption capacity of banana peel, chestnut shell, and tea leaf waste at 1.94 mg g-1 2.25 mg g-1, and 3.36 mg g-1, respectively. Copper was determined by flame atomic absorption spectrometry.
AtıfScopus19İncele - DergiAtomic Spectroscopy