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

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 RHCclinop 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.

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