Investigation of the use of green bayburt stones as adsorbent by statistical experimental design

The tuff type, which is defined as Bayburt Stone in Bayburt region, is frequently used as industrial raw material in the region. These stones consist of three different varieties; white, green and yellow. As it is known, in recent years, the use of low-cost and easy-to-supply natural raw materials as adsorbents for removing various pollutants from wastewaters has become a very important issue. In this context, the adsorbent characteristic of green Bayburt stone was investigated by using a Taguchi experiment design which is one of the statistical experimental design methods after milling to very small dimensions (d50=13.20 µm). In the experimental studies cobalt (Co) element was selected as a model heavy metal. The optimum adsorption parameter values of green Bayburt stone were determined as 7 for pH, 250 mg/L for initial metal concentration and 0,250 g for adsorbent dose. According to the findings, adsorption capacity of the adsorbent for Co(II) was calculated as qe = 60.16 (mg/g), and this value was found to be comparable with many studies in the literature.