Sequential study on reactive blue 29 dye removal from aqueous solution by peroxy acid and single wall carbon nanotubes: experiment and theory

<p>Abstract</p> <p>The majority of anthraquinone dye released to the environment come from antrapogenic sources. Several techniques are available for dyes' removal. In this study removal of reactive blue 29 (RB29) by an advanced oxidation process sequenced with single wall carbon nanotubes was investigated. Advanced oxidation process was optimized over a period of 60 minutes by changing the ratio of acetic acid to hydrogen peroxide, the compounds which form peroxy acid. Reduction of 20.2% -56.4% of reactive blue 29 was observed when the ratio of hydrogen peroxide/acetic acid/dye changed from 344/344/1 to 344/344/0.08 at different times (60, 120 and 180 min). The optimum ratio of acetic acid/hydrogen peroxide/dye was found to be 344/344/0.16 over 60 min. The resultant then was introduced for further removal by single wall carbon nanotubes(SWCNTs) as adsorbent. The adsorption of reactive blue 29 onto SWCNTs was also investigated. Langmuir, Freundlich and BET isotherms were determined and the results revealed that the adsorption of RB29 onto SWCNTs was well explained by BET model and changed to Freundlich isotherm when SWCNTs was used after the application of peroxy acid. Kinetic study showed that the equilibrium time for adsorption of RB 29 on to SWCNT is 4 h. Experiments were carried out to investigate adsorption kinetics, adsorbent capacity and the effect of solution pH on the removal of reactive blue29. The pseudo-second order kinetic equation could best describe the sorption kinetics. The most efficient pH for color removal (amongst pH=3, 5 and 8) was pH= 5. Further studies are needed to identify the peroxy acid degradation intermediates and to investigate their effects on SWCNTs.</p

Sexual Lives and Family Function of Women with Family Member with Disability: Educational Status and Income Level

This study was conducted to determine how sexual lives and family functions of women with low educational and income status who had family members with disability were influenced. The study included subjects with disability comprising 12.29% of Turkish population who have disabilities. Using the sampling formula in which the size of universe was known, the sample included the families with 183 children with disability and women. Study was conducted in the center of the province Kayseri with children with disability in families with low socio-economic status, attending a school and with the families living in a neighborhood with low socio-economic status. Low income level determined unhealthiness and 56.8% of the participants reported to have problems in sexual relation. Sexual lives and family functions of women with low educational status and income level were determined to be negatively more affected because of an additional problem; having a member with disability in the family