Recently, the search for low-cost eco-friendly adsorbents has become one of the main objectives of researchers. The aim of this study was to test the removal of four heavy metals, namely lead (Pb), zinc (Zn), nickel (Ni) and cadmium (Cd), from a simulated watery solution using brewed tea waste as a potentially suitable adsorbent. The effects of pH levels (2.0–6.0), adsorbent amount (0.1–5.0 g), contact times (1–150 min.) were examined throughout the adsorption process. The results of the experiments showed that the heavy metals elimination yields had an inverse relationship with pH and a linear relationship between the other parameters. The optimum pH for the removal of the heavy metals was between 4.0 and 5.0 in the case of the brewed tea waste. Equilibrium times of 2, 10, 30 and 5 min were required for the adsorption of Pb, Zn, Ni, Cd onto Camellia sinensis, respectively. Based on the results of this study it can be said that brewed tea waste has a high potential to remove heavy metals from aqueous solutions. The maximum adsorption capacities were calculated as 1.197, 1.457, 1.163 and 2.468 mg/g, for Pb, Zn, Ni and Cd, respectively, by fitting the equilibrium data to the Langmuir isotherm model.

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Today, because of technological innovations, types and production of electric and electronic equipment is increasing. As a result of this, rapid consumption is also gaining speed. Recovery of electronic waste is important when considering its potential negative effects to the environment and considering its materials that already have economical values. This study is an analysis of the level of consumer choice of e‐waste in Niğde‐Aksaray Province. A survey was conducted to evaluate the level of knowledge about e‐waste in the province and also e‐waste and waste management perspectives were evaluated. Statistical package for the social sciences has been used for Likert scale analysis. After analyzing the survey, the results showed that consumers do not have clear information about electronic and electric equipment (EEE). Only 22% of the participants suggested that e‐waste recycling was more significant than other sorts of recycling. When the users were made aware of the topic, they were highly motivated to contribute to the EEE recycling. According to the responses, the important resource materials could be gained after recycling e‐waste in order to preserve natural resources. Moreover, 39% of the respondents supported the municipality controlled e‐waste collection centers for increasing the number of collected e‐waste. In addition, the fact that people were willing to participate in e‐waste collection campaigns would guide future management strategies for e‐waste in these provinces.

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