In this study, hazelnut shells, orange peel, and melon seeds were selected as raw materials in the preparation of activated carbon. Various activators at different concentrations under two activation temperatures of 300 °C and 500 °C were utilized. All produced adsorbents and a commercial activated carbon as a reference were used for the adsorption of acetic acid from its aqueous solutions in the various initial concentrations. The effect of the amounts of adsorbents was also studied. Removal efficiencies (Re%) and adsorption capacities (Qe) were experimentally determined. Langmuir, Freundlich, and Temkin isotherms were modelled, and their parameters were calculated. The surface area, pore volumes, and average pore width of the activated carbons were characterized by N2 adsorption at 77.35 K using the BET, t-plot, and BJH methods, respectively. The highest BET surface area of the activated carbon from hazelnut shells was obtained as 717.738 m2/g at 500 °C activation temperature and 60% H3PO4 concentration. SEM images and FTIR analyses were investigated. It was found that activated carbons of hazelnut shells and orange peel showed higher efficiencies than commercial activated carbon.

The rise of smartphones, tablets and mobile apps is an important development in health and healthcare, particularly social apps that provide learning and collaboration opportunities to busy health professionals and health education for the general public. Effective use of smartphones is part of how doctors and patients communicate in the 21st century. This paper focuses on one social media and networking service that was launched in 2010 and active user base is reached 600 million by the end of 2017, namely Instagram. In medicine, Instagram is finding a niche among health professionals that use hospital-specific and dedicated accounts and groups on these platforms to communicate and encourage social and mobile forms of learning. Instagram is free and easy-to-use apps that facilitate all sorts of clinical and non-clinical exchanges, and can also support mobile learning. This paper focuses on the content of images of three Turkish hospitals' Instagram accounts on January-September 2018 which provide health-related information in the today's digital era.