پديدآورندگان :
Mohammadi Sayed Zia szmohammadi@yahoo.com Payame Noor University, Tehran, Iran , Karimi Mohammad Ali - Payame Noor University, Tehran, Iran , Mofidi Nasab Nastaran - Payame Noor University, Tehran, Iran
چكيده فارسي :
In recent decades, the water pollution has become one of the major environmental threats due to the release of the toxic and hazardous chemical from various activities [1]. The heavy metals are one of the most commonly used materials which are used in various industries, when these metal ions are discharged in the effluent of industries they possess several environmental and detrimental effects on human health as well as prevailing flora and fauna. Nickel belongs to heavy metal groups and has various industrial applications such as mineral processing, electroplating, production of paints and batteries, manufacturing of sulfate and porcelain enameling [2]. Despite the extensive use of nickel, this has known to be a toxic and hazardous element which can cause severe health problems to lungs, kidneys, gastrointestinal distress such as nausea, vomiting, diarrhea, pulmonary fibrosis, renal edema, and skin dermatitis [3]. Thus, the heavy metals, especially nickel, must be rapidly removed and adsorbed from the industrial effluents. The previous studies reported that there are numerous techniques for heavy metal removal from effluents but among all the adsorption process were found to be most effective and extensively used method for this purpose [4].In recently years, the magnetic activated carbon have been widely used as an adsorbent for the removal of toxic metals and organic pollutants from aqueous solutions due to their large specific surface area, chemical and mechanical stability, layered structure and high capacity.In the present work, the removal of nickel ions from aqueous system based on magnetic activated carbon was evaluated. The physicochemical and morphological characterization of the synthesized magnetic activated carbon was studied by using XRD and FT-IR techniques. Then, the magnetic activated carbon was used for removal of nickel ions and the equilibrium data was evaluated by adsorption isotherm model and thermodynamic equations. The maximum adsorption capacity of nickel ions on the magnetic activated carbons was 90.7 mg g−1. Adsorption experiments will be performed in batch system. The results were showed that magnetic activated carbon give large adsorption capacity, excellent chemical stability, and good reusability, suggesting utility as a highly potential adsorbent for separating nickel ions from aqueous solution.
