Preparation of Eco-friendly Adsorbents for Removal of Boron from Aqueous Solutions
Project no. 21712 · Status: Kapanmış (Yayın bekleniyor) · 2020
Summary
Boron poisoning of water is a common environmental problem, as even a few parts per million of boron in irrigation water can stifle plant growth. To preserve the environment, an effective method for removing boron from water and reducing the boron content below the permitted limit before it is discharged into the environment must be developed. Adsorption is shown to be superior to other approaches for removing contaminants from water and wastewater. The goal of this research is to employ modified biochar made from agricultural wastes (corn and tomatoes) as an adsorbent for removing boron from aqueous solutions. A 23 full factorial design was employed to assess the importance of the influences of three performance-related factors using analysis of variance (statistical software, MINITAB-Version 20). It was possible to get the model-function equation for boron adsorption on maize waste-based biochar. According to the findings, the temperature and mass of the adsorbent had an impact on boron removal by adsorption. On boron removal, the impacts of variables such pyrolysis circumstances, modification type, ionic strength, temperature, adsorbent dosage, pH, and beginning boron concentration were examined. For corn and tomatoes, the optimal conditions were pH 4 and 6, adsorbent dosage 1 and 2g of biochar per 25 mL solution, and temperature 25 0C, respectively. The isotherm of adsorption using corn waste biochar and kinetic investigations were also carried out. The highest adsorbent capacity (q) of corn and tomato biochar was calculated to be 0.1 and 0.3 mg/g, respectively. For corn waste biochar the thermodynamic parameters such as (?G), (?H), and (?S) were also calculated. (FTIR), (SEM), (XRD), (TGA), and (BET) were used to characterize the corn -based biochar . To assess the reusability of corn biochar, 1M NaOH solution was used as an eluent for desorbing boron.