پديدآورندگان :
Sohrabi Nasrin nsohrabi48@gmail.com Department of Chemistry, Payame Noor, University, P.O.19395-3697-Tehran, Iran; E-mail: , Rasouli Nahid n.rasooli55@yahoo.com Department of Chemistry, Payame Noor, University, P.O.19395-3697-Tehran, Iran; E-mail: , Janighorban Mohtaram mjstd1350@gmail.com Department of Chemistry, Payame Noor, University, P.O.19395-3697-Tehran, Iran Iranian National Standardization organization , Isfahan; E-mail
چكيده فارسي :
Absorption of Cd2+ onto modified LDH(Zn-Al) with anionic food dye(LDHQ) as adsorbent was studied following full LDH characterization by FT-IR spectroscopy, scanning electron microscopy and BET( Brunauer, Emmet, and Teller). The effects of variables were studied and optimized by a central composite design (CCD) combined with response surface methodology (RSM) and desirability function (DF). The good agreement between experimental and prediction data at optimum values of all variables was explored. The optimum condition set as follow: 10-80 mg/l of Cd2+ concentration, pH 4.01 for sample solution, 0.09 g of LDHQ and 56 min rotation with magnetic stirrer, and 20.2ºC of temperature as mass transfer process. The small amount of proposed adsorbent (0.09 g) was applicable for removal of Cd (RE 88%) at 56 min with high adsorption capacity (10 mg/l).
