Functionalization of Zeolite Y with Ethylene diamine and Evaluation of its Efficiency in Removing Heavy Metal ions such as Cd and Pb

Contamination of surface water with heavy metal ions, particularly in industrial areas, is extremely harmful to the environment and human health. At accumulation levels above the permissible limit, tissues and organs are harmed, and various symptoms lead to dizziness, headache, insomnia, loss of memory, and cancer. Heavy metals, due to their toxic nature, must be removed from water for environmental safety and water preservation. Among different methods, the use of zeolites for removal of heavy metal ions is promising. Due to their molecular sieving properties, zeolites find great uses in water treatment. These compounds can adsorb and remove minerals, organic matters, and heavy metals from water. The performance of zeolites in different processes such as ion separation, catalysis of chemical reactions, and proton transfer is determined by their chemical properties and pore diameter. In this project we aimed the utilization of ethylenediamine-functionalized zeolite Y for heavy metal ions removal. To this end, the zeolite Y was soaked with methanol and then functionalized with ethylenediamine at ۷۵% weight percent. FT-IR spectrum confirmed that the zeolite Y was functionalized successfully. To study the removal of metals, two metal ions, Cadmium and lead (II) were selected. First, a ۲۵۰ mL solution with a concentration of ۱۰ mM of metal salt cadmium nitrate or lead (II) nitrate trihydrate prepared. Next, ۰.۱ grams of the zeolite Y ۷۵% amine was mixed with ۲۵ mL of the heavy metal ions solution and allowed to be stirred for ۲۴ hours. After ۲۴ hours, the filtrate was subjected to atomic absorption spectrometry (AAS). According to the results, both metals were eliminated by ۹۹%.

کلیدواژه ها:

Zeolite Y ، Functionalization ، Heavy metal adsorption ، Water purification