Evaluation of the bio-carbon produced from weeds and its magnetic nanocomposite loaded with MnFe2O4 nanoparticles to remove some heavy metals from aqueous solution

Activated carbons are widely used as they have high adsorption capacity due to their wide surface area and porosity structure. However, because of their high cost, scientists have sought to look for alternative methods to prepare cheaper adsorbents. Recently, biocarbons are widely used as alternative adsorbents due to their economic, eco-friendly and renewable properties. In this thesis study, weeds (W) in the campus area of Dicle University were evaluated for the first time in the preparation of a low cost and eco-friendly new biocarbon and its MnFe2O4 loaded nano-composite adsorbents. For this purpose, the provided Ws were washed several times with tap water, then with distilled water and dried in the daylight until the pollution was removed. TGA/DTA, XRD, SEM, proksimate and aproksimate analyzes of dried Ws were performed. The dried Ws were then convert to biocarbon (WC) by carbonization in the nitrogen gas atmosphere in the tube furnace. Its WC/MnFe2O4 composite was prepared by loading MnFe2O4 nanoparticles into the WC. The resulting WC and its WC/MnFe2O4 composite were characterized by physical and chemical methods such as BET, SEM, FT-IR, Boehm's titration and zero charge pH. In addition, the prepared adsorbents were characterized as being adsorbent in the removal of heavy metal from the aqueous solution. İn order to optimize the adsorption conditions, the effect of the parameters acting on the adsorption, such as solution pH, adsorbent amount, adsorbent concentration, contact time and solution temperature were examined. Kinetic and isotherm studies were performed to evaluate the physicochemical interaction between adsorbent and adsorbent. Using the kinetic and isotherm data, kinetic, isotherm and thermodynamic parameters of the adsorption system were determined.