Dual metal zeolitic imidazolate frameworks as an organometallic polymer for effective adsorption of chlorpyrifos in aqueous solution under optimized conditions assisted BOX-Behnken desig
کد مقاله : 1020-INZC6
افشین رحمتی *1، عبدالرِِئوف صمدی میبدی2
1گروه شیمی-دانشگاه مازندران-دانشکده شیمی
2مدیرگروه شیمی تجزیه-دانشگاه مازندران-دانشکده شیمی
چکیده مقاله:
ZIFS are a set of MOFS materials with chemical and thermal stabilities that are topologically isomorphic with zeolite and contain functionalized organic linked and transition metal ions. Dual metal Zeolitic imidazolate frameworks (ZIF-2M) containing two metals of Zinc and Cobalt was successfully synthesized in the aqueous solution (free solvent) at room temperature and characterized by Common methods such as X-ray diffraction (XRD) , field emission (FESEM), Furrier transform infra red (FTIR), energy dispersive X-ray (EDX) and Brunauer–Emmett–Teller ( BET). The presence of second metal led to the improving in both chemical as well as physical properties such as crystal structure, porosity, specific area and magnetic property together keeping basic structure of ZIFs. The removal efficiency of chlorpyrifos was examined by both of dual metal (ZIF-2M) as well as single metal ZIF (ZIF-8) under similar circumstances. The potential parameters affecting on the removal efficiency such as dose of absorbent, pH and contact time were investigated. The optimum conditions were achieved by BOX-Behnken design. Results revealed that removal efficiency of ZIF-2M (97%) is more than that of ZIF-8 (90%). Langmuir and Freundlich isotherms were also studied under optimal conditions.
کلیدواژه ها:
Keywords: Chlorpyrifos; Dual metal ZIF; Langmuir isotherm; Freundlich isotherm; BOX-Behnken design; ZIF-
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