کارایی نانوذرات آلوم سنتز شده به روش الکتروشیمیایی در حذف اسید تانیک به عنوان پیش ساز تری هالومتان های سرطان زا از آب آشامیدنی: مطالعه ایزوترم و سینتیک

عنوان انگليسی

Efficiency of electrochemical-synthesized alum nanoparticles in the removal of tannic acid as a precursor of carcinogenic trihalomethanes from drinking water: isotherm and kinetics study

خلاصه انگلیسی

In this experimental study, alum adsorbent was synthesized using an electrochemical process consisting of aluminum (anode) and iron (cathode) electrodes in a 1 L cylindrical reactor. The structure of the alum adsorbent was investigated using transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller techniques. Adsorption process experiments were evaluated with four input parameters such as pH (4–9), alum nanoparticles dosage (0.01–0.05 g/L), initial concentration of tannic acid (10–80 mg/L), and contact time (5–50 min). The isotherm and adsorption kinetics were examined under optimal experimental conditions to evaluate the adsorption process. The results of the physicochemical analysis confirmed the accuracy of the alum structure. Under optimal conditions of the adsorption process, pH, adsorbent dose, initial concentration of tannic acid, and contact time were 6, 0.05 g/L, 20 mg/L, and 50 min; Under these conditions, the removal efficiency of tannic acid was obtained to be 93.9%. The results of the adsorption isotherm and kinetics studies showed that the adsorption process follows the Langmuir isotherm (R2 = 0.99) while the process kinetics corresponds to the second-order kinetics model (R2 = 1). The results showed that alum can be used as a high-availability and cost-effective adsorbent to remove tannic acid from aqueous solutions.

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