Paper Title
Dye Removal by Nano Zero Valent Iron Coupled with ca2+ : Optimization using the Box - Behnken Design

Abstract
This research investigated enhancement effect of reactive red-159 (RR-159), a dye contaminant, remediation by nano-zero valent iron (NZVI) coupled with Ca2+. The Box-Behnken Design (BBD) was applied to search for the optimal condition for RR-159 removal. Three variable parameters, initial pH, initial concentration of RR-159, and Ca2+ dosage per 0.1 g of NZVI were applied for the removal of the contaminant. The results revealed that high removal of RR-159 (95.64%) can be obtained when the conditions of the removal were initial pH at 3, 1000 mg/L of initial concentration of RR-159, and 0.15 of Ca2+ per 0.1 g of NZVI. Keywords - Nanoiron, NZVI, Adsorption, Dye removal, Nano materials.