Preparation of rice husk carbon-clinoptilolite composite adsorbent for color removal from real textile wastewater: Effects of operating conditions

摘要

This study investigates the optimal operating conditions for preparation of rice husk carbon-clinoptilolite (RHC-clinop) composite adsorbent for color removal from dye house facility. Central composite design (CCD) was used to determine the effects of the four preparation variables; clinoptilolite (clinop), rice husk carbon (RHC), ordinary Portland cement (OPC) and water binder ratio (W/B) on percentage color removal and attrition. The significant factors on each experimental design response were identified from the analysis of variance (ANOVA). The optimum operating conditions for RHC-clinop preparation were obtained by using clinop, RHC, OPC and W/B of 16g, 9g, 38g and 15mL, respectively, which resulted in 92% of color removal and 17% of attrition. FTIR analysis showed the chemical changes on the surface of the RHC-clinop prepared before and after batching tests. The RHC-clinop prepared in this study could be a promising composite adsorbent for dye waste water treatment due to high efficiency of color removal and least attrition.