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Absorption patterns of Ni2+ ions from artificial solutions were studied using vermiculite-based ionites. As a result of research, first- and second-order sorption kinetics were considered and analyzed. It was found that the kinetic parameters of the results obtained as a result of the sorption of Ni2+ ions on vermiculite-based ionite are close to the pseudo-second order kinetics of sorption. It can be seen from the studies that the sorption kinetics of the second order of ion absorption into the ion exchanger obeys, and the correlation coefficient of the sorption kinetics of the second order is, respectively, Ni2+ (R2=0.9967-0.9988), the correlation coefficient of the sorption kinetics of the first order N2+ (R2=0.796 -0.863) turned out to be equal to the value. The absorption activation energy of Ni2+ metal ions was determined based on the values of 19.8 kj/mol for the nickel ion. [ABSTRACT FROM AUTHOR]

In this study, as being a cationic surfactant, hexadecyltrimethylammonium bromide (HDTMA-Br) sorption on vermiculite, perlite and zeolite was investigated. Because of using cationic surfactant as softener in the last rinsing, it is discharged as household waste to environmental media at high concentrations. Therefore, removal of cationic surfactants from environmental media is important. Sorption characteristics were searched in terms of sorption capacities and Langmuir, Freundlich, Temkin and Dubinin-Redushkevich isotherm models using batch method. After changing surface of adsorbents to their homoinonic forms by using NaCl, surfaces were become suitable for sorption of positively charged surfactant molecules. HDTMA sorption on vermiculite was best described by Freundlich isotherm model, while Langmuir model was fitted well for perlite and zeolite. Also, experimental and theoretical qe values were compared and found that they were fitted well with each other. As a result of experiments, it was found that retained HDTMA by adsorbents were 99%, 75% and 96.5% for vermiculite, perlite and zeolite, respectively. It is assumed that the major mechanisms for the sorption of HDTMA on adsorbent are ion exchange between Na ions and HDTMA molecules, electrostatic interaction between negatively charged surface and positively charged surfactant molecules, and also hydrophobic interactions between hydrophobic sides of HDTMA molecules. [ABSTRACT FROM AUTHOR]