Efficient Removal of Cu۲+ ions and Malachite green dyefrom Aqueous Solutions by Polyanionic Sodium Alginate-derived Hydrogel

Industrialization and human activities have a significant impact on the environment, contributing to issues such as global warming, deforestation, air pollution, and water pollution[۱]. Metal ions from various sources are released into the water body, posing a great threat to the human body through the food chain. The purpose of the present work is to develop a novel, environmentally friendly and reusable adsorption material with low-cost and excellent adsorption capacity for removing the heavy metal ions from sewage. Presently, natural biopolymers are the most widely used materials for wastewater treatment because as natural materials they are: (i) inexpensive and renewable; (ii) abundant at large scale; (iii) biocompatible and biodegradable[۲]. In the presented study, a novel clay/ sodium alginate /Salep/ Carboxymethyl cellulose (CMC) Hydrogel nanocomposite was synthesized for efficient removal of Malachite green dye and Cu۲+ ions from contaminated water. The most significant factors that influence the adsorption capacity of adsorbents are pH, adsorbent dose, pollutant’s initial concentration, contact time, and temperature. Optimization of these factors should be carefully considered to design industrial scale adsorption processes. The hydrogel structure, thermal stability, surface morphology, and surface area were studied using FT-IR, SEM, EDX, TGA, and BET techniques. Utilizing the Langmuir isotherm model, the maximum sorption capacities were determined to be ۵۲۶ mg/g for copper ions and ۱۳۱.۵ mg/g for Malachite green.

کلیدواژه ها:

Adsorption ، Wastewater ، Malachite green ، Copper ions